This document discusses managing transactions in ADO.NET. It covers local transactions which operate on a single data source and distributed transactions which operate on multiple data sources. It describes the properties of transactions, types of transactions classes in ADO.NET, and how to perform and commit local and distributed transactions programmatically using methods like BeginTransaction(), Complete(), and Commit(). It also discusses transaction isolation levels and how to specify them.
The document provides an overview of developing database applications using ADO.NET and XML. It discusses the ADO.NET object model which includes data providers and datasets. Data providers are used to connect to databases and retrieve data to fill datasets. Connections, commands, data readers and data adapters are the key components of data providers. The document also covers creating and managing connections, executing SQL statements, and handling connection events and pooling.
The document discusses working with data adapters in ADO.NET. It explains that a data adapter retrieves data from a database into a dataset and then updates the database. Different types of data adapters like SqlDataAdapter can be used depending on the database. The data adapter uses properties like SelectCommand and methods like Fill() to transfer data between the database and dataset. It also addresses resolving concurrency issues and improving performance through batch updates.
This document discusses data binding and navigating records in database applications using ADO.NET and XML. It describes implementing simple and complex data binding to display data on Windows form controls from a data source. It also explains using the BindingNavigator control to navigate between records in the data source and interact with the records. Key steps include binding control properties like Text to columns in the data source and using controls in the BindingNavigator to move between records.
The document discusses working with datasets and datatables in a disconnected environment in ADO.NET. It describes how datasets store and manipulate data disconnected from the database, and how they contain datatables which in turn contain columns and rows of data. It also discusses typed and untyped datasets, relationships between tables, and using dataviews to filter and sort data in a datatable.
The document discusses connected and disconnected environments in ADO.NET. A connected environment maintains a constant connection to the data source, while a disconnected environment does not directly connect. It also covers synchronous and asynchronous operations using command objects, and how asynchronous commands can improve performance by executing in parallel. Methods like BeginExecuteReader() and EndExecuteReader() are used for asynchronous retrieval and completion of data.
The document provides an overview of ADO.NET objects used to interact with databases, including the SqlConnection object used to connect to databases, the SqlCommand object used to execute queries and commands, and the SqlDataReader object used to read query results. It also introduces the DataSet object for caching data in memory and the SqlDataAdapter object for loading and writing data between a database and the in-memory DataSet.
This document provides a summary of a session on SQL Server security and authentication using ADO.NET. The session discusses SQL Server authentication modes including Windows authentication and SQL Server authentication. It demonstrates how to programmatically manage SQL Server logins, roles, and permissions from VB.NET. The document also covers application security techniques using views, stored procedures and SQL Server application roles to restrict database access.
The document discusses ADO.NET, which is a model used by .NET applications to communicate with a database. It identifies the key components of ADO.NET, including the data provider, dataset, connection, data adapter, and data command. The data adapter transfers data between a database and dataset using commands like Select, Insert, Update and Delete. It also discusses how to connect to a database by creating a data adapter and accessing the database through a dataset.
The document provides an overview of developing database applications using ADO.NET and XML. It discusses the ADO.NET object model which includes data providers and datasets. Data providers are used to connect to databases and retrieve data to fill datasets. Connections, commands, data readers and data adapters are the key components of data providers. The document also covers creating and managing connections, executing SQL statements, and handling connection events and pooling.
The document discusses working with data adapters in ADO.NET. It explains that a data adapter retrieves data from a database into a dataset and then updates the database. Different types of data adapters like SqlDataAdapter can be used depending on the database. The data adapter uses properties like SelectCommand and methods like Fill() to transfer data between the database and dataset. It also addresses resolving concurrency issues and improving performance through batch updates.
This document discusses data binding and navigating records in database applications using ADO.NET and XML. It describes implementing simple and complex data binding to display data on Windows form controls from a data source. It also explains using the BindingNavigator control to navigate between records in the data source and interact with the records. Key steps include binding control properties like Text to columns in the data source and using controls in the BindingNavigator to move between records.
The document discusses working with datasets and datatables in a disconnected environment in ADO.NET. It describes how datasets store and manipulate data disconnected from the database, and how they contain datatables which in turn contain columns and rows of data. It also discusses typed and untyped datasets, relationships between tables, and using dataviews to filter and sort data in a datatable.
The document discusses connected and disconnected environments in ADO.NET. A connected environment maintains a constant connection to the data source, while a disconnected environment does not directly connect. It also covers synchronous and asynchronous operations using command objects, and how asynchronous commands can improve performance by executing in parallel. Methods like BeginExecuteReader() and EndExecuteReader() are used for asynchronous retrieval and completion of data.
The document provides an overview of ADO.NET objects used to interact with databases, including the SqlConnection object used to connect to databases, the SqlCommand object used to execute queries and commands, and the SqlDataReader object used to read query results. It also introduces the DataSet object for caching data in memory and the SqlDataAdapter object for loading and writing data between a database and the in-memory DataSet.
This document provides a summary of a session on SQL Server security and authentication using ADO.NET. The session discusses SQL Server authentication modes including Windows authentication and SQL Server authentication. It demonstrates how to programmatically manage SQL Server logins, roles, and permissions from VB.NET. The document also covers application security techniques using views, stored procedures and SQL Server application roles to restrict database access.
The document discusses ADO.NET, which is a model used by .NET applications to communicate with a database. It identifies the key components of ADO.NET, including the data provider, dataset, connection, data adapter, and data command. The data adapter transfers data between a database and dataset using commands like Select, Insert, Update and Delete. It also discusses how to connect to a database by creating a data adapter and accessing the database through a dataset.
The document provides an overview of ADO.NET and its core classes:
- ADO.NET uses datasets to store data from a database in memory and data provider objects like connections, commands, and data adapters to retrieve and update data in the database.
- The .NET Framework includes the SQL Server and OLE DB data providers, which provide classes like SqlConnection and OleDbConnection to connect to databases.
- Core classes like SqlCommand represent SQL statements, and SqlDataAdapter links commands and connections to datasets to load and save data.
The document provides an introduction to ADO.NET architecture, including its benefits and core concepts. It discusses key ADO.NET objects like Connection, Command, DataReader, DataSet and DataAdapter. It explains how these objects are used to connect to databases, execute queries, retrieve and manage data in memory, and update data sources.
This document provides an overview of ADO.NET components including data providers, datasets, datatables, connections, commands, parameters, dataadapters, and datareaders. It discusses the architecture of ADO.NET and the roles and properties of key classes. The data provider, connection, and command classes are described in detail along with examples of how to establish a connection and execute commands against a database.
ODBC (Open Database Connectivity) was Microsoft's first database access technology. It provided a C interface that allowed applications to access data from different database management systems (DBMS) using a standardized call level interface. While widely adopted, it had some drawbacks including requiring a C interface and putting a burden on drivers to emulate a relational database for non-relational data sources.
ADO.NET is a set of classes that allows .NET applications to access data from databases. It includes classes for connecting to databases, executing commands, retrieving data, and updating data. The key classes are Connection, Command, DataSet, DataAdapter, and DataReader. ADO.NET uses a disconnected model where data is retrieved into a DataSet object using a DataAdapter and then disconnected from the database. This allows for improved scalability and performance compared to older data access methods.
The document discusses several differences between ADO.NET concepts including:
1) DataReader allows reading one record at a time in a forward-only manner while DataAdapter allows navigating records and updating data in a disconnected manner.
2) DataSet allows caching and manipulating disconnected data across multiple tables while DataReader requires an open connection and only retrieves data from a single query.
3) DataSet.Copy() copies both structure and data of a DataSet while DataSet.Clone() only copies the structure without any data.
4) ADO.NET uses XML, disconnected architecture, and the DataSet object while classic ADO uses binary format, requires active connections, and the Recordset object.
Disconnected Architecture and Crystal report in VB.NETEverywhere
This document discusses disconnected architecture in ADO.NET. It explains that ADO.NET uses a dataset object to enable disconnected data access through filling the dataset using a data adapter. The dataset acts as an in-memory cache of data and does not interact directly with the data source. Data tables within the dataset contain rows and columns of data. The data adapter acts as a bridge between the dataset and data source, using commands to fill the dataset from a query and update changes back to the source. Stored procedures can also be used to encapsulate database operations when working with a dataset in a disconnected manner.
The document discusses data access in .NET applications. It describes how earlier models like DAO and ADO had issues around performance and connectivity. ADO.NET improved on ADO by using a disconnected data access model where connections are opened briefly to perform operations then closed. ADO.NET relies on datasets, which hold in-memory representations of data, and data providers like SQL Client that maintain connections to databases.
This chapter covers programming with data in databases using ADO.NET. It discusses accessing and modifying database data declaratively using data source controls or programmatically using ADO.NET classes like DbConnection, DbCommand, and DbDataReader. It also covers filling DataSet objects with data from databases using DbDataAdapter and executing transactions across multiple databases.
The document discusses databases and database management systems (DBMS) and relational database management systems (RDBMS). It defines key terms like data, information, databases, DBMS, RDBMS and provides examples. It also summarizes the differences between DBMS and RDBMS and lists some popular RDBMS like Oracle, SQL Server, and Access. The document then focuses on Oracle, providing details on its components, tools and applications.
This document discusses data representation in C# and ADO.NET. It begins by explaining that C# objects are similar to Java objects but with properties instead of getter/setter methods. It then covers how to create a class with properties in C# and use objects. The document also discusses encapsulation in ADO.NET and how it handles connecting to databases. It provides steps for connecting to a database, creating a data adapter and dataset, binding controls to display data, and adding code to populate the dataset and allow navigation between records.
This document provides an overview of relational database programming using ADO.NET. It discusses relational database systems and SQL, connecting applications to databases, using database objects like commands and readers, and executing statements. Key topics covered include relational models, SQL, database constraints, ADO.NET providers and objects, parameterized commands, and transactions.
This document discusses files and streams in .NET framework 4.5. It covers navigating the file system using classes like FileInfo, DirectoryInfo, and DriveInfo. It also discusses reading and writing files using streams, including FileStream for binary data and StreamReader/StreamWriter for text. Key points covered include getting information on files and directories, creating/deleting files and folders, and reading/writing files using streams in a simple way compared to FileStream.
With help of this small Proof of Concept, I have tried to demonstrate the usage of Neo4J (Graph DB) as a metastore for a Data Lake or a DW. Graph DBs can store highly relational data and help us in doing data discovery and impact analysis, which bit more complex to bee done in an RDBMS.
JAM819 - Native API Deep Dive: Data Storage and RetrievalDr. Ranbijay Kumar
Nearly all apps need to store data on device. Join this session for an overview of the various APIs that can be used to store and retrieve data from device memory. Learn how to leverage different storage mechanisms available and what to consider. This session will cover, the file system, SQLite and persistent settings and how to implement this in your native C and Cascades application.
This document provides an overview of ADO.NET and how to access relational data using it in Microsoft Visual Studio .NET. It covers key ADO.NET concepts like the object model, DataSets, and DataAdapters. It also demonstrates how to connect to a database, generate and populate a DataSet, and display dataset data in list-bound controls like a DataGrid. The document includes lessons, demonstrations, and a practice activity on these topics.
The document discusses ADO (ActiveX Data Objects) and how it facilitates communication between programming languages and data sources through intermediate components like drivers and providers. It explains different types of drivers like JET and ODBC drivers and their uses. It also discusses providers, and how they address some limitations of drivers. The document then introduces ADO.NET as a redesign of ADO with managed providers for .NET languages. It discusses various classes used for data access in ADO.NET. Finally, it explains concepts like connections, commands, data readers, datasets, and data adapters which are used for connecting to data sources and managing data in ADO.NET applications.
ADO.NET provides a disconnected data access model that establishes connections to databases only when needed to execute commands or retrieve data. This improves performance, security, and scalability compared to ADO which uses a connected model. ADO.NET relies on two main components - the DataSet, which stores an in-memory copy of retrieved data, and Data Providers which include Connection, Command, DataReader and DataAdapter classes to interface with databases and populate/update the DataSet.
This document summarizes key observations and annotations made while working with Oracle 10g in a database lab. It describes how to create tables and insert, update, and delete records using SQL. It also covers integrity constraints, aggregate functions, and join operations in Oracle 10g. The annotations provide helpful tips for defining schemas, allowing and handling null values, adding constraints, and renaming columns - which will assist students and others working with Oracle 10g.
The document discusses ADO.NET and working with datasets and data adapters in a disconnected model. It provides an introduction to ADO.NET and how it allows connecting application UIs to data sources. It describes dealing with databases using connected and disconnected models and the ADO.NET data architecture. It explains how to work with datasets as in-memory representations of data with tables, columns, rows and relations. It discusses using a data adapter to populate a dataset from a data source using Fill() and update the data source from the dataset using Update().
The document discusses transaction management in EJB. It defines transactions and the ACID properties of atomicity, consistency, isolation, and durability. It describes transaction models like flat and nested transactions. It also discusses transaction isolation levels, distributed transactions using two-phase commit protocol, and how to control transactions programmatically using the Java Transaction API in EJB.
WebLogic Transaction Service provides transaction processing capabilities in WebLogic Server. It uses the Java Transaction API (JTA) model where the transaction manager coordinates transactions across multiple resource managers like databases. Transactions can have different isolation levels to balance consistency, concurrency and performance. WebLogic supports both local and global transactions within and across domains. Transaction parameters, monitoring, recovery and debugging options are available to manage transactions in WebLogic Server.
The document provides an overview of ADO.NET and its core classes:
- ADO.NET uses datasets to store data from a database in memory and data provider objects like connections, commands, and data adapters to retrieve and update data in the database.
- The .NET Framework includes the SQL Server and OLE DB data providers, which provide classes like SqlConnection and OleDbConnection to connect to databases.
- Core classes like SqlCommand represent SQL statements, and SqlDataAdapter links commands and connections to datasets to load and save data.
The document provides an introduction to ADO.NET architecture, including its benefits and core concepts. It discusses key ADO.NET objects like Connection, Command, DataReader, DataSet and DataAdapter. It explains how these objects are used to connect to databases, execute queries, retrieve and manage data in memory, and update data sources.
This document provides an overview of ADO.NET components including data providers, datasets, datatables, connections, commands, parameters, dataadapters, and datareaders. It discusses the architecture of ADO.NET and the roles and properties of key classes. The data provider, connection, and command classes are described in detail along with examples of how to establish a connection and execute commands against a database.
ODBC (Open Database Connectivity) was Microsoft's first database access technology. It provided a C interface that allowed applications to access data from different database management systems (DBMS) using a standardized call level interface. While widely adopted, it had some drawbacks including requiring a C interface and putting a burden on drivers to emulate a relational database for non-relational data sources.
ADO.NET is a set of classes that allows .NET applications to access data from databases. It includes classes for connecting to databases, executing commands, retrieving data, and updating data. The key classes are Connection, Command, DataSet, DataAdapter, and DataReader. ADO.NET uses a disconnected model where data is retrieved into a DataSet object using a DataAdapter and then disconnected from the database. This allows for improved scalability and performance compared to older data access methods.
The document discusses several differences between ADO.NET concepts including:
1) DataReader allows reading one record at a time in a forward-only manner while DataAdapter allows navigating records and updating data in a disconnected manner.
2) DataSet allows caching and manipulating disconnected data across multiple tables while DataReader requires an open connection and only retrieves data from a single query.
3) DataSet.Copy() copies both structure and data of a DataSet while DataSet.Clone() only copies the structure without any data.
4) ADO.NET uses XML, disconnected architecture, and the DataSet object while classic ADO uses binary format, requires active connections, and the Recordset object.
Disconnected Architecture and Crystal report in VB.NETEverywhere
This document discusses disconnected architecture in ADO.NET. It explains that ADO.NET uses a dataset object to enable disconnected data access through filling the dataset using a data adapter. The dataset acts as an in-memory cache of data and does not interact directly with the data source. Data tables within the dataset contain rows and columns of data. The data adapter acts as a bridge between the dataset and data source, using commands to fill the dataset from a query and update changes back to the source. Stored procedures can also be used to encapsulate database operations when working with a dataset in a disconnected manner.
The document discusses data access in .NET applications. It describes how earlier models like DAO and ADO had issues around performance and connectivity. ADO.NET improved on ADO by using a disconnected data access model where connections are opened briefly to perform operations then closed. ADO.NET relies on datasets, which hold in-memory representations of data, and data providers like SQL Client that maintain connections to databases.
This chapter covers programming with data in databases using ADO.NET. It discusses accessing and modifying database data declaratively using data source controls or programmatically using ADO.NET classes like DbConnection, DbCommand, and DbDataReader. It also covers filling DataSet objects with data from databases using DbDataAdapter and executing transactions across multiple databases.
The document discusses databases and database management systems (DBMS) and relational database management systems (RDBMS). It defines key terms like data, information, databases, DBMS, RDBMS and provides examples. It also summarizes the differences between DBMS and RDBMS and lists some popular RDBMS like Oracle, SQL Server, and Access. The document then focuses on Oracle, providing details on its components, tools and applications.
This document discusses data representation in C# and ADO.NET. It begins by explaining that C# objects are similar to Java objects but with properties instead of getter/setter methods. It then covers how to create a class with properties in C# and use objects. The document also discusses encapsulation in ADO.NET and how it handles connecting to databases. It provides steps for connecting to a database, creating a data adapter and dataset, binding controls to display data, and adding code to populate the dataset and allow navigation between records.
This document provides an overview of relational database programming using ADO.NET. It discusses relational database systems and SQL, connecting applications to databases, using database objects like commands and readers, and executing statements. Key topics covered include relational models, SQL, database constraints, ADO.NET providers and objects, parameterized commands, and transactions.
This document discusses files and streams in .NET framework 4.5. It covers navigating the file system using classes like FileInfo, DirectoryInfo, and DriveInfo. It also discusses reading and writing files using streams, including FileStream for binary data and StreamReader/StreamWriter for text. Key points covered include getting information on files and directories, creating/deleting files and folders, and reading/writing files using streams in a simple way compared to FileStream.
With help of this small Proof of Concept, I have tried to demonstrate the usage of Neo4J (Graph DB) as a metastore for a Data Lake or a DW. Graph DBs can store highly relational data and help us in doing data discovery and impact analysis, which bit more complex to bee done in an RDBMS.
JAM819 - Native API Deep Dive: Data Storage and RetrievalDr. Ranbijay Kumar
Nearly all apps need to store data on device. Join this session for an overview of the various APIs that can be used to store and retrieve data from device memory. Learn how to leverage different storage mechanisms available and what to consider. This session will cover, the file system, SQLite and persistent settings and how to implement this in your native C and Cascades application.
This document provides an overview of ADO.NET and how to access relational data using it in Microsoft Visual Studio .NET. It covers key ADO.NET concepts like the object model, DataSets, and DataAdapters. It also demonstrates how to connect to a database, generate and populate a DataSet, and display dataset data in list-bound controls like a DataGrid. The document includes lessons, demonstrations, and a practice activity on these topics.
The document discusses ADO (ActiveX Data Objects) and how it facilitates communication between programming languages and data sources through intermediate components like drivers and providers. It explains different types of drivers like JET and ODBC drivers and their uses. It also discusses providers, and how they address some limitations of drivers. The document then introduces ADO.NET as a redesign of ADO with managed providers for .NET languages. It discusses various classes used for data access in ADO.NET. Finally, it explains concepts like connections, commands, data readers, datasets, and data adapters which are used for connecting to data sources and managing data in ADO.NET applications.
ADO.NET provides a disconnected data access model that establishes connections to databases only when needed to execute commands or retrieve data. This improves performance, security, and scalability compared to ADO which uses a connected model. ADO.NET relies on two main components - the DataSet, which stores an in-memory copy of retrieved data, and Data Providers which include Connection, Command, DataReader and DataAdapter classes to interface with databases and populate/update the DataSet.
This document summarizes key observations and annotations made while working with Oracle 10g in a database lab. It describes how to create tables and insert, update, and delete records using SQL. It also covers integrity constraints, aggregate functions, and join operations in Oracle 10g. The annotations provide helpful tips for defining schemas, allowing and handling null values, adding constraints, and renaming columns - which will assist students and others working with Oracle 10g.
The document discusses ADO.NET and working with datasets and data adapters in a disconnected model. It provides an introduction to ADO.NET and how it allows connecting application UIs to data sources. It describes dealing with databases using connected and disconnected models and the ADO.NET data architecture. It explains how to work with datasets as in-memory representations of data with tables, columns, rows and relations. It discusses using a data adapter to populate a dataset from a data source using Fill() and update the data source from the dataset using Update().
The document discusses transaction management in EJB. It defines transactions and the ACID properties of atomicity, consistency, isolation, and durability. It describes transaction models like flat and nested transactions. It also discusses transaction isolation levels, distributed transactions using two-phase commit protocol, and how to control transactions programmatically using the Java Transaction API in EJB.
WebLogic Transaction Service provides transaction processing capabilities in WebLogic Server. It uses the Java Transaction API (JTA) model where the transaction manager coordinates transactions across multiple resource managers like databases. Transactions can have different isolation levels to balance consistency, concurrency and performance. WebLogic supports both local and global transactions within and across domains. Transaction parameters, monitoring, recovery and debugging options are available to manage transactions in WebLogic Server.
Scaling Cloud-Scale Translytics Workloads with Omid and PhoenixDataWorks Summit
Recently, Apache Phoenix has been integrated with Apache (incubator) Omid transaction processing service, to provide ultra-high system throughput with ultra-low latency overhead. Phoenix has been shown to scale beyond 0.5M transactions per second with sub-5ms latency for short transactions on industry-standard hardware. On the other hand, Omid has been extended to support secondary indexes, multi-snapshot SQL queries, and massive-write transactions.
These innovative features make Phoenix an excellent choice for translytics applications, which allow converged transaction processing and analytics. We share the story of building the next-gen data tier for advertising platforms at Verizon Media that exploits Phoenix and Omid to support multi-feed real-time ingestion and AI pipelines in one place, and discuss the lessons learned.
This document discusses new features in Visual Studio 2010 and .NET Framework 4. It provides an overview of improvements to the .NET Framework including numerics, data structures, I/O, and a unified cancellation model. It also describes goals of the CLR 4 such as better integration, performance, and reliability through features like in-process side-by-side loading, the dynamic language runtime, parallel extensions, and code contracts for debugging. The workshop will examine these new capabilities in the .NET Framework 4.
Jdon Framework is a lightweight framework that helps build clean and fluent architecture systems using domain-driven design principles. It introduces reactive and event-driven patterns into the domain layer. Jdon uses an asynchronous and non-blocking approach to allow for higher throughput applications compared to traditional request-response frameworks like Spring. Key aspects of Jdon include domain events that enable loose coupling between components, and a single-writer model that guarantees single operations on in-memory state.
This document outlines a course on .NET programming with VB.NET. It introduces key .NET concepts like the Common Language Runtime (CLR) and assemblies. It describes how VB.NET code is compiled to MSIL and executed by the CLR. The course covers building classes and objects in VB.NET, object-oriented programming fundamentals, working with .NET framework classes, creating Windows and web forms applications, and data access with ADO.NET.
The document discusses .NET Remoting and how it enables communication between .NET applications. It compares .NET Remoting to other technologies like DCOM and web services, noting they have some similarities but also differences in their goals and implementations. Specifically, .NET Remoting provides an abstract approach to interprocess communication, while web services represent a concrete XML-based implementation of that approach. The document also positions .NET Remoting as an improvement over DCOM, which it replaces as the technology for remote communication between Windows applications.
The document provides an introduction to .NET, including:
- What .NET is and its main components like the .NET Framework and building blocks.
- How ADO.NET bridges the gap between XML and relational data using DataSet.
- How web services are a key part of .NET and how they can be created and consumed in Visual Studio.NET.
- Issues around migrating from older DNA/COM-based architectures to .NET.
This document discusses transaction management and concurrency control in database systems. It defines a transaction as a logical unit of work that must be completed or aborted without intermediate states. Transactions are formed by multiple database requests and must transform the database from one consistent state to another. The document outlines the properties of transactions including atomicity, durability, serializability and isolation. It also discusses concurrency control techniques like locking and time stamping methods to coordinate simultaneous transaction execution and ensure serializability.
DBF-Lecture11-Chapter12.ppt
Database Principles: Fundamentals of Design, Implementations and Management
Lecture11- CHAPTER 12: Transaction Management and Concurrency Control
Presented by Rabia Cherouk
*
ObjectivesIn this chapter, you will learn:About database transactions and their propertiesWhat concurrency control is and what role it plays in maintaining the database’s integrityWhat locking methods are and how they workHow stamping methods are used for concurrency controlHow optimistic methods are used for concurrency controlHow database recovery management is used to maintain database integrity
*
What is a Transaction?A transaction is a logical unit of work that must be either entirely completed or abortedSuccessful transaction changes database from one consistent state to anotherOne in which all data integrity constraints are satisfiedMost real-world database transactions are formed by two or more database requestsEquivalent of a single SQL statement in an application program or transaction
Same as Fig. 12.1 in your book
*
Same as Fig. 12.1 in your book
*
Evaluating Transaction Results Not all transactions update the databaseSQL code represents a transaction because database was accessedImproper or incomplete transactions can have devastating effect on database integritySome DBMSs provide means by which user can define enforceable constraintsOther integrity rules are enforced automatically by the DBMS
Same as Fig. 12.2 in your book
*
Figure 9.2
Same as Fig. 12.2 in your book
*
Transaction Properties
All transactions must display atomicity, consistency, durability and serializability (ACIDS).AtomicityAll operations of a transaction must be completedConsistency Permanence of database’s consistent stateIsolation Data used during transaction cannot be used by second transaction until the first is completed
*
Transaction Properties (cont..)Durability Once transactions are committed, they cannot be undoneSerializabilityConcurrent execution of several transactions yields consistent resultsMultiuser databases are subject to multiple concurrent transactions
*
Transaction Management with SQLANSI (American National Standard Institute) has defined standards that govern SQL database transactionsTransaction support is provided by two SQL statements: COMMIT and ROLLBACKTransaction sequence must continue until:COMMIT statement is reachedROLLBACK statement is reachedEnd of program is reachedProgram is abnormally terminated
*
The Transaction LogA DBMS uses a Transaction log to store:A record for the beginning of transactionFor each transaction component: Type of operation being performed (update, delete, insert)Names of objects affected by transaction“Before” and “after” values for updated fieldsPointers to previous and next transaction log entries for the same transactionEnding (COMMIT) of the transaction
Table 12.1 in your book
*
The Transaction Log
Table 12.1 in your book
*
Concurrency ControlIs the coordination o.
The document provides an overview of Microsoft .NET, including its history, goals, basic elements, and comparison to J2EE. Some key points:
- .NET aims to provide cross-platform interoperability, multi-language support, and code reuse. Its basic elements include the Common Language Runtime, class libraries, ASP.NET, Windows Forms, ADO.NET, and XML web services.
- It compares to J2EE in providing an infrastructure for building enterprise applications but supports more programming languages due to the Common Language Runtime. Language interoperability is a core advantage of .NET over J2EE.
- An example demonstrates how .NET services could enable a doctor's palmtop
MicroServices at Netflix - challenges of scaleSudhir Tonse
Microservices at Netflix have evolved over time from a single monolithic application to hundreds of fine-grained services. While this provides benefits like independent delivery, it also introduces complexity and challenges around operations, testing, and availability. Netflix addresses these challenges through tools like Hystrix for fault tolerance, Eureka for service discovery, Ribbon for load balancing, and RxNetty for asynchronous communication between services.
The document discusses ADO.NET and provides an overview of its architecture and programming model. It describes how ADO.NET provides a unified way to access different data sources through a common set of interfaces and classes. It also outlines connection-oriented and disconnected scenarios in ADO.NET and provides a code example that connects to a SQL Server database, executes a command, and reads results using ADO.NET interfaces like IDbConnection and IDataReader.
The document discusses the .NET platform and framework. It provides an overview of the key components of .NET including the Common Language Runtime (CLR) environment that executes programs, the Framework Class Library (FCL) base classes and libraries, and support for multiple programming languages. It also describes concepts like application domains, marshaling objects across boundaries, and how programs are compiled to Microsoft Intermediate Language (MSIL) and executed.
The document provides an overview of Node.js including that it is a cross-platform runtime environment for JavaScript outside the browser, uses an event-driven and non-blocking I/O model, and is perfect for data-intensive real-time applications. It discusses Node.js features like being extremely fast, asynchronous and event-driven, single-threaded, and highly scalable. The document also covers installing Node.js, using the command line interface and REPL, basic commands, data types, functions, buffers, the process object, global scope, and exporting modules.
iProcess Server’s architecture we can see that its engines are organized into nodes, where a node is formed by 1 or N iProcess Engine servers sharing a database instance.
Transaction and concurrency pitfalls in JavaErsen Öztoprak
This document discusses transactions and concurrency in Java. It examines transaction management with the ACID properties and different transaction models including local, programmatic, and declarative. It describes how to create and end transactions using SQL commands as well as the use of autocommit. Concurrency management essentials and isolation levels in databases are also covered. Examples of implementing transactions using JDBC, Spring's TransactionTemplate and PlatformTransactionManager, and the @Transactional annotation are provided.
The document provides an overview of .NET technology and VB.NET programming. It discusses key aspects of .NET including the Common Language Runtime (CLR), Common Type System, Windows Forms, Web Forms, Web Services, ADO.NET, XML support, and multiple language support. It also covers VB.NET programming concepts like forms, events, databases, dialog boxes, menus, classes, and arrays of objects. The document is intended as teaching material for a course on .NET and VB.NET programming.
Microsoft .NET is a software framework that allows for the creation of web services and applications that can integrate and share information across devices, systems and languages. It consists of common language runtime, class libraries, ASP.NET for web applications and Windows Forms for desktop apps. .NET uses XML and SOAP to connect systems and web services provide reusable applications. The framework and tools like Visual Studio allow developers to build and deploy cross-platform applications and services.
The document discusses legacy connectivity and protocols. It describes legacy integration as integrating J2EE components with legacy systems. The key approaches to legacy integration are data level integration, application interface integration, method level integration, and user interface level integration. Legacy connectivity can be achieved using Java Native Interface (JNI), J2EE Connector Architecture, and web services. JNI allows Java code to call native methods written in other languages like C/C++. The J2EE Connector Architecture standardizes connectivity through resource adapters. Web services provide a platform-independent approach through XML protocols.
The document discusses messaging and internationalization. It covers messaging using Java Message Service (JMS), including the need for messaging, messaging architecture, types of messaging, messaging models, messaging servers, components of a JMS application, developing effective messaging solutions, and implementing JMS. It also discusses internationalizing J2EE applications.
The document discusses Java 2 Enterprise Edition (J2EE) application security. It covers security threat assessment, the Java 2 security model, and Java security APIs. The Java 2 security model provides access controls and allows downloading and running applications securely. It uses techniques like cryptography, digital signatures, and SSL. The Java Cryptography Extensions API provides methods for encrypting data, generating keys, and authentication.
The document discusses various security tools in Java including keytool, jarsigner, and policytool. Keytool is used to manage keystores containing private keys and certificates. It can generate key pairs, import/export certificates, and list keystore contents. Jarsigner signs JAR files using certificates from a keystore. Policytool creates and edits security policy files specifying user permissions. The document provides details on using each tool's commands and options.
This document discusses EJB technology and provides summaries of key concepts:
1. It defines the EJB container model and describes features like security, distributed access, and lifecycle management.
2. It compares the lifecycles of stateless session beans, stateful session beans, entity beans, and message-driven beans.
3. It contrasts stateful and stateless session beans and discusses differences in client state, pooling, lifecycles, and more. It also compares session beans and entity beans in terms of representing processes versus data.
This document discusses behavioral design patterns and J2EE design patterns. It provides descriptions and class diagrams for several behavioral patterns, including Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, and Visitor. It also defines what a J2EE design pattern is and notes that J2EE patterns are categorized into the presentation, business, and integration tiers of an enterprise application.
This document provides an overview of EJB in J2EE architecture and EJB design patterns. It discusses the key characteristics of using EJB in J2EE architecture, including supporting multiple clients, improving reliability and productivity, supporting large scale deployment, developing transactional applications, and implementing security. It also outlines several EJB design patterns, such as client-side interaction patterns, EJB layer architectural patterns, inter-tier data transfer patterns, and transaction/persistence patterns.
This document discusses design patterns and provides examples of structural and behavioral design patterns. It describes the adapter, bridge, composite, decorator, facade, flyweight, proxy, chain of responsibility, and command patterns. Structural patterns are concerned with relationships and responsibilities between objects, while behavioral patterns focus on communication between objects. Examples of UML diagrams are provided to illustrate how each pattern can be modeled.
The document discusses UML diagrams that can be used to model J2EE applications, including use case diagrams, class diagrams, package diagrams, sequence diagrams, collaboration diagrams, state diagrams, activity diagrams, component diagrams, and deployment diagrams. It provides examples of each diagram type using a case study of an online bookstore system. The use case diagram shows use cases and actors, the class diagram shows classes and relationships, and other diagrams demonstrate how specific interactions, workflows, and system configurations can be modeled through different UML diagrams.
This document discusses design patterns and selecting appropriate patterns based on business requirements. It provides an overview of design patterns available in TheServerSide.com pattern catalog, which are organized into categories like EJB layer architectural patterns, inter-tier data transfer patterns, transaction and persistence patterns, and client-side EJB interaction patterns. Examples of patterns in each category are described. Best practices for developing class diagrams and using proven design patterns are also mentioned.
This document provides an overview of J2EE architecture. It defines architecture as the study of designing J2EE applications and discusses architectural concepts like attributes, models, and terminology. It describes the role of an architect and phases of architectural design. The document outlines the various components of J2EE like clients, web components, business components and containers. It also discusses key aspects of J2EE architecture like application areas, issues, technologies and available application servers.
The document discusses various topics related to collaboration and distributed systems including network communication in distributed environments, application integration using XML, and legacy integration technologies. Specifically, it covers factors that affect network performance like bandwidth and latency. It also describes using XML for data mapping between applications and data stores. Finally, it discusses different legacy integration methods like screen scraping, object mapping tools, and using off-board servers.
The document discusses JavaBean properties, property editors, and the classes used to implement them in Java. It describes the PropertyEditorSupport class and its methods for creating customized property editors. The PropertyDescriptor class and BeanInfo interface provide information about JavaBean properties, events, and methods. The document also provides tips on using sample JavaBeans from BDK1.1 in Java 2 SDK and creating a manifest file for multiple JavaBeans. Common questions about JavaBeans are answered.
The document discusses JavaBean properties and custom events. It defines different types of JavaBean properties like simple, boolean, indexed, bound, and constrained properties. It also explains how to create custom events by defining an event class, event listener interface, and event handler. The event handler notifies listeners when an event occurs. Finally, it demonstrates creating a login JavaBean that uses a custom event to validate that a username and password are not the same.
The document introduces JavaBeans, which are reusable software components created using Java. It discusses JavaBean concepts like properties, methods, and events. It also describes the Beans Development Kit (BDK) environment for creating, configuring, and testing JavaBeans. BDK includes components like the ToolBox, BeanBox, Properties window, and Method Tracer window. The document provides demonstrations of creating a sample JavaBean applet and user-defined JavaBean using BDK. It also covers topics like creating manifest and JAR files for packaging JavaBeans.
The document provides information on working with joins, the JDBC API, and isolation levels in Java database applications. It discusses different types of joins like inner joins, cross joins, and outer joins. It describes the key interfaces in the JDBC API like Statement, PreparedStatement, ResultSet, Connection, and DatabaseMetaData. It also covers isolation levels and how they prevent issues with concurrently running transactions accessing a database.
The document discusses various advanced features of JDBC including using prepared statements, managing transactions, performing batch updates, and calling stored procedures. Prepared statements improve performance by compiling SQL statements only once. Transactions allow grouping statements to execute atomically through commit and rollback. Batch updates reduce network calls by executing multiple statements as a single unit. Stored procedures are called using a CallableStatement object which can accept input parameters and return output parameters.
The document introduces JDBC and its key concepts. It discusses the JDBC architecture with two layers - the application layer and driver layer. It describes the four types of JDBC drivers and how they work. The document outlines the classes and interfaces that make up the JDBC API and the basic steps to create a JDBC application, including loading a driver, connecting to a database, executing statements, and handling exceptions. It provides examples of using JDBC to perform common database operations like querying, inserting, updating, and deleting data.
The document discusses classes and objects in Java, including defining classes with data members and methods, creating objects, using constructors, and the structure of a Java application. It also covers access specifiers, modifiers, compiling Java files, and provides a summary of key points about classes and objects in Java.
The document discusses casting and conversion in Java. It covers implicit and explicit type conversions, including widening, narrowing, and casting conversions. It also discusses overloading constructors in Java by defining multiple constructor methods with the same name but different parameters. The document provides examples of casting integer and double values to byte type, as well as overloading the Cuboid constructor to calculate volumes for rectangles and squares.
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdfMalak Abu Hammad
Discover how MongoDB Atlas and vector search technology can revolutionize your application's search capabilities. This comprehensive presentation covers:
* What is Vector Search?
* Importance and benefits of vector search
* Practical use cases across various industries
* Step-by-step implementation guide
* Live demos with code snippets
* Enhancing LLM capabilities with vector search
* Best practices and optimization strategies
Perfect for developers, AI enthusiasts, and tech leaders. Learn how to leverage MongoDB Atlas to deliver highly relevant, context-aware search results, transforming your data retrieval process. Stay ahead in tech innovation and maximize the potential of your applications.
#MongoDB #VectorSearch #AI #SemanticSearch #TechInnovation #DataScience #LLM #MachineLearning #SearchTechnology
Communications Mining Series - Zero to Hero - Session 1DianaGray10
This session provides introduction to UiPath Communication Mining, importance and platform overview. You will acquire a good understand of the phases in Communication Mining as we go over the platform with you. Topics covered:
• Communication Mining Overview
• Why is it important?
• How can it help today’s business and the benefits
• Phases in Communication Mining
• Demo on Platform overview
• Q/A
HCL Notes and Domino License Cost Reduction in the World of DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-and-domino-license-cost-reduction-in-the-world-of-dlau/
The introduction of DLAU and the CCB & CCX licensing model caused quite a stir in the HCL community. As a Notes and Domino customer, you may have faced challenges with unexpected user counts and license costs. You probably have questions on how this new licensing approach works and how to benefit from it. Most importantly, you likely have budget constraints and want to save money where possible. Don’t worry, we can help with all of this!
We’ll show you how to fix common misconfigurations that cause higher-than-expected user counts, and how to identify accounts which you can deactivate to save money. There are also frequent patterns that can cause unnecessary cost, like using a person document instead of a mail-in for shared mailboxes. We’ll provide examples and solutions for those as well. And naturally we’ll explain the new licensing model.
Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
These topics will be covered
- Reducing license cost by finding and fixing misconfigurations and superfluous accounts
- How do CCB and CCX licenses really work?
- Understanding the DLAU tool and how to best utilize it
- Tips for common problem areas, like team mailboxes, functional/test users, etc
- Practical examples and best practices to implement right away
Full-RAG: A modern architecture for hyper-personalizationZilliz
Mike Del Balso, CEO & Co-Founder at Tecton, presents "Full RAG," a novel approach to AI recommendation systems, aiming to push beyond the limitations of traditional models through a deep integration of contextual insights and real-time data, leveraging the Retrieval-Augmented Generation architecture. This talk will outline Full RAG's potential to significantly enhance personalization, address engineering challenges such as data management and model training, and introduce data enrichment with reranking as a key solution. Attendees will gain crucial insights into the importance of hyperpersonalization in AI, the capabilities of Full RAG for advanced personalization, and strategies for managing complex data integrations for deploying cutting-edge AI solutions.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slackshyamraj55
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Maruthi Prithivirajan, Head of ASEAN & IN Solution Architecture, Neo4j
Get an inside look at the latest Neo4j innovations that enable relationship-driven intelligence at scale. Learn more about the newest cloud integrations and product enhancements that make Neo4j an essential choice for developers building apps with interconnected data and generative AI.
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Driving Business Innovation: Latest Generative AI Advancements & Success StorySafe Software
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
Building Production Ready Search Pipelines with Spark and MilvusZilliz
Spark is the widely used ETL tool for processing, indexing and ingesting data to serving stack for search. Milvus is the production-ready open-source vector database. In this talk we will show how to use Spark to process unstructured data to extract vector representations, and push the vectors to Milvus vector database for search serving.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
Mind map of terminologies used in context of Generative AI
Ado.net session10
1. Developing Database Applications Using ADO.NET and XML
Objectives
In this session, you will learn to:
Manage local transactions
Manage distributed transactions
Ver. 1.0 Session 10 Slide 1 of 31
2. Developing Database Applications Using ADO.NET and XML
Managing Local Transactions
A transaction can be defined as a sequence of operations
that are performed together as a single logical unit of work.
If a transaction is successful, all the data modifications
performed in the database will be committed and saved.
If a transaction fails or an error occurs, then the transaction
is rolled back to undo the data modifications done in the
database.
Ver. 1.0 Session 10 Slide 2 of 31
3. Developing Database Applications Using ADO.NET and XML
Properties of a Transaction
For a transaction to commit successfully within a database,
it should possess the following four properties:
Atomicity States that either all the modifications
are performed or none of them are
performed
Consistency States that data is in a consistent state
after a transaction is completed
successfully to maintain the integrity of
data
Isolation States that any data modification made
by one transaction must be isolated from
the modifications made by the other
transaction
Durability States that any change in data by a
completed transaction remains
permanently in effect in the database
Ver. 1.0 Session 10 Slide 3 of 31
4. Developing Database Applications Using ADO.NET and XML
Types of Transaction
ADO.NET provides support for two types of transactions:
Local transactions A local transaction performs on a single
data source. Because local transactions
are performed on a single data source,
these transactions are efficient to
operate and easy to manage.
A distributed transaction performs on
Distributed transactions multiple data sources. Distributed
transactions enable you to incorporate
several distinct transactional operations
into an atomic unit that either succeed or
fail completely.
Ver. 1.0 Session 10 Slide 4 of 31
5. Developing Database Applications Using ADO.NET and XML
Performing Local Transactions
• ADO.NET has an interface, IDbTransaction that
contains methods for creating and performing local
transactions against a single data source.
• The following table lists the transaction classes available in
the .NET Framework 2.0.
Types of Transaction Classes Description
System.Data.SqlClient.SqlTransaction Transaction class for .NET framework
data provider for SQL Server
System.Data.OleDb.OleDbTransaction Transaction class for .NET framework
data provider for OLE DB
System.Data.Odbc.OdbcTransaction Transaction class for .NET framework
data provider for ODBC
System.Data.OracleClient.OracleTransaction Transaction class for .NET framework
data provider for Oracle
Ver. 1.0 Session 10 Slide 5 of 31
6. Developing Database Applications Using ADO.NET and XML
Performing Local Transactions (Contd.)
Let us understand how to create a local transaction.
string connectString = Creating a connection to the
data source
"Initial Catalog=AdventureWorks;
Data Source=SQLSERVER01;
User id=sa;Password=niit#1234";
SqlConnection cn = new SqlConnection();
cn.Open();
cn = connectString;
SqlTransaction tran = null;
Ver. 1.0 Session 10 Slide 6 of 31
7. Developing Database Applications Using ADO.NET and XML
Performing Local Transactions (Contd.)
try
{
tran = cn.BeginTransaction(); Calling the BeginTransaction()
SqlCommand cmd = new method
Creating the command object and
SqlCommand("INSERT INTO
passing the SQL command
empdetails(ccode,cname,
caddress,cstate,ccountry,
cDesignation,cDepartment)
VALUES(1101,'Linda Taylor',
'Oxfordshire','London',
'UK','Manager','Finance')", cn, tran);
Ver. 1.0 Session 10 Slide 7 of 31
8. Developing Database Applications Using ADO.NET and XML
Performing Local Transactions (Contd.)
cmd.ExecuteNonQuery();
Committing the transaction if
the command succeeds
tran.Commit();
Console.WriteLine("Transaction
Committedn)";
}
catch (SqlException ex)
{ Rolling back the transaction if the
tran.Rollback(); command fails
Console.WriteLine("Error
- TRANSACTION ROLLED BACKn"
+ ex.Message);
}
Ver. 1.0 Session 10 Slide 8 of 31
9. Developing Database Applications Using ADO.NET and XML
Performing Local Transactions (Contd.)
catch (System.Exception ex)
{
Console.WriteLine("System Errorn" +
ex.Message);
}
finally
{
cn.Close();
}
Console.ReadLine();
}
}
}
Ver. 1.0 Session 10 Slide 9 of 31
10. Developing Database Applications Using ADO.NET and XML
Just a minute
Which method is called when a transaction succeeds in its
operation?
1. Rollback()
2. Commit()
3. BeginTransaction()
4. ExecuteNonQuery()
Answer:
2. Commit()
Ver. 1.0 Session 10 Slide 10 of 31
11. Developing Database Applications Using ADO.NET and XML
Demo: Managing Local Transactions
Problem Statement:
John Howard, the HR executive has joined as a head of the
Finance department at Texas. Therefore, his details need to be
added to the HR database. The Department code for the
Finance department is D002. The user name that needs to be
assigned to him is JohnH and the password is howard.
As a part of the development team, you need to create a
transaction that will allow you to add these details in the
HRusers and Department tables.
Ver. 1.0 Session 10 Slide 11 of 31
12. Developing Database Applications Using ADO.NET and XML
Managing Distributed Transactions
• Distributed transactions are performed on multiple data
sources or multiple connections within a data source.
• Distributed transactions are created in the
System.Transaction namespace.
• The System.Transaction namespace has a
TransactionScope class, which enables a developer to
create and manage distributed transactions.
• To create a distributed transaction, a TransactionScope
object is created in a using block.
• The TransactionScope object decides whether to create
a local transaction or a distributed transaction. This is
known as transaction promotion.
Ver. 1.0 Session 10 Slide 12 of 31
13. Developing Database Applications Using ADO.NET and XML
Managing Distributed Transactions (Contd.)
Let us understand how to create a distributed transaction.
using (TransactionScope ts Creating the TransactionScope
= new TransactionScope()) object
{
using(SqlConnection cn Creating a connection to the data
= new SqlConnection("Initial source
Catalog=HR;Data
Source=SQLSERVER01;User
id=sa;Password=niit#1234"))
{
cn.Open();
Ver. 1.0 Session 10 Slide 13 of 31
14. Developing Database Applications Using ADO.NET and XML
Managing Distributed Transactions (Contd.)
using(SqlCommand cmd = new Creating a SqlCommand object
to insert a record in the
SqlCommand("INSERT INTO
HRusers table
HRusers(cUserName,cPassword)
VALUES('Darren','Cooper')", cn))
{
int rowsUpdated =
cmd.ExecuteNonQuery();
if (rowsUpdated > 0)
{
Ver. 1.0 Session 10 Slide 14 of 31
15. Developing Database Applications Using ADO.NET and XML
Managing Distributed Transactions (Contd.)
SqlConnection cn1 = new Creating another connection to the
SqlConnection("Initial same data source
Catalog=HR;Data
Source=SQLSERVER01;User
id=sa;Password=niit#1234"))
{
cn1.Open();
using (SqlCommand cmd1 = Creating another SqlCommand
object to delete a record in the
new SqlCommand("DELETE
Department table
Department WHERE
cDepartmentCode=1111", cn1))
{
int rowsUpdated1 =
cmd1.ExecuteNonQuery();
Ver. 1.0 Session 10 Slide 15 of 31
16. Developing Database Applications Using ADO.NET and XML
Managing Distributed Transactions (Contd.)
if (rowsUpdated1 > 0)
{
ts.Complete(); Calling the Complete() method
to commit the transactions
Console.WriteLine
("Transaction Committedn");
cn1.Close();
}
}}}
cn.Close();
}}
Console.ReadLine();
}}}
Ver. 1.0 Session 10 Slide 16 of 31
17. Developing Database Applications Using ADO.NET and XML
Just a minute
The _______ method is invoked to commit the distributed
transaction.
1. Commit()
2. BeginTransaction()
3. Complete()
4. Rollback()
Answer:
3. Complete()
Ver. 1.0 Session 10 Slide 17 of 31
18. Developing Database Applications Using ADO.NET and XML
Performing Bulk Copy Operations in a Transaction
• Bulk copy operations can be performed as an isolated
operation or as a part of a transaction.
• By default, a bulk copy operation is its own transaction.
• To perform a bulk copy operation, you need to create a new
instance of BulkCopy class with a connection string.
• The bulk copy operation creates, and then, commits or rolls
back the transaction.
Ver. 1.0 Session 10 Slide 18 of 31
19. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction
An isolation level determines the effect a transaction has on
other transactions that are currently running, and vice versa.
By default, all transactions are completely isolated and run
concurrently without impacting each other.
The isolation level of a transaction specifies the locking
strategy used by the connection running the transaction to
prevent concurrency problems when multiple transactions
access the same data.
Ver. 1.0 Session 10 Slide 19 of 31
20. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
The following table describes the concurrency errors that
can occur if multiple transactions access the same data at
the same time.
Concurrency Error Description
Dirty read A transaction reads the data that has not been
committed by the other transaction. This can
create problem if a transaction that has added
the data is rolled back.
Nonrepeatable read A transaction reads the same row more than
once and a different transaction modifies the row
between the reads.
Phantom read A transaction reads a rowset more than once
and a different transaction inserts or deletes
rows between the first transaction’s reads.
Ver. 1.0 Session 10 Slide 20 of 31
21. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
The various types of isolation levels of a transaction are:
Read Uncommitted
Read Committed with Locks
Read Committed with Snapshots
Repeatable Read
Snapshot
Serializable
Ver. 1.0 Session 10 Slide 21 of 31
22. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
The following table describes the various isolation levels
and the corresponding concurrency errors for a transaction.
Isolation Level Dirty Read Nonrepeatable Read Phantom Read
Read Uncommitted Yes Yes Yes
Read Committed No Yes Yes
with Locks
Read Committed No Yes Yes
with Snapshots
Repeatable Read No No Yes
Snapshot No No No
Serializable No No No
Ver. 1.0 Session 10 Slide 22 of 31
23. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
Let us understand how to set the isolation level of a
transaction to Read Committed.
TransactionOptions options = new Initializing the
TransactionOptions
TransactionOptions(); object
options.IsolationLevel = Setting the Isolation level of
System.Transactions.IsolationLevel. both transactions to Read
Committed
ReadC ommitted;
using(TransactionScope ts = new
TransactionScope
(TransactionScopeOption.
Required, options)){
using (SqlConnection cn = new Creating a connection to
a data source
SqlConnection("Initial Catalog=
HR;Data Source=SQLSERVER01;
User id=sa;Password=niit#1234;")){
cn.Open();
Ver. 1.0 Session 10 Slide 23 of 31
24. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
using(SqlCommand cmd = new Creating a SqlCommand
object to insert a record in the
SqlCommand("INSERT INTO Department table
Department(cDepartmentCode
,vDepartmentName,vDepartmentHead,
vLocation) VALUES(2013,'IT','Lara
King','Houston')", cn)){
int rowsUpdated =
cmd.ExecuteNonQuery();
if (rowsUpdated > 0)
{
Ver. 1.0 Session 10 Slide 24 of 31
25. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
using (SqlConnection cn1 = Creating another connection to
the same data source
new SqlConnection("Initial
Catalog=HR;Data
Source=SQLSERVER01;User
id=sa;Password=niit#1234"))
{
cn1.Open();
using(SqlCommand cmd = new Creating another command
SqlCommand("INSERT INTO object to insert a record in the
HRusers table
HRusers(cUserName,cPassword
) VALUES('Hansel','Lord')",
cn1))
Ver. 1.0 Session 10 Slide 25 of 31
26. Developing Database Applications Using ADO.NET and XML
Specifying Isolation Levels of a Transaction (Contd.)
{
int rowsUpdated1 =
cmd1.ExecuteNonQuery();
if (rowsUpdated1 > 0)
{
ts.Complete(); Calling the Complete() method
to commit both transactions
}}}}
Ver. 1.0 Session 10 Slide 26 of 31
27. Developing Database Applications Using ADO.NET and XML
Just a minute
Which isolation level supports the occurrence of Dirty read,
Nonrepeatable read, and Phantom read?
1. Read Committed with Locks
2. Serializable
3. Read Committed with Snapshots
4. Read Uncommitted
Answer:
4. Read Uncommitted
Ver. 1.0 Session 10 Slide 27 of 31
28. Developing Database Applications Using ADO.NET and XML
Demo: Managing Distributed Transactions
Problem Statement:
Pamela Cruz has joined as an HR executive in Tebisco.
Therefore, her details that includes user name and password
needs to be inserted in the HRusers table. In addition, the
details about her position needs to be added in the Position
table. Both the operations need to be performed
simultaneously in both the tables. As a part of the development
team, you need to add the required details for Pamela in the
HR database.
Note: To enable execution of the distributed transactions, you
need to ensure that the MSDTC services are running on your
system.
Ver. 1.0 Session 10 Slide 28 of 31
29. Developing Database Applications Using ADO.NET and XML
Summary
In this session, you learned that:
A transaction is a logical unit of work that must be completed to
maintain the consistency and integrity of a database.
A transaction has the following properties:
Atomicity
Consistency
Isolation
Durability
The two types of transaction are:
Local transactions
Distributed transactions
Ver. 1.0 Session 10 Slide 29 of 31
30. Developing Database Applications Using ADO.NET and XML
Summary (Contd.)
A local transaction performs on a single data source. The
IDbTransaction interface contains methods for creating and
performing local transactions against a data source.
A distributed transaction performs on multiple data sources. A
distributed transaction enables you to incorporate several
distinct transactional operations into an atomic unit that either
succeed or fail completely.
Bulk copy operations can be performed as an isolated
operations or as a part of a transaction. By default, a bulk copy
operation is its own transaction.
An isolation level determines the effect a transaction has on
other transactions that are currently running, and vice versa.
Ver. 1.0 Session 10 Slide 30 of 31
31. Developing Database Applications Using ADO.NET and XML
Summary (Contd.)
The various concurrency errors that can occur when multiple
transactions access the same data at the same time are:
Dirty read
Nonrepeatable read
Phantom read
The various types of isolation levels are for a transaction are:
Read Uncommitted
Read Committed with Locks
Read Committed with Snapshots
Repeatable Read
Snapshot
Serializable
Ver. 1.0 Session 10 Slide 31 of 31
Editor's Notes
Introduce the students to the course by asking them what they know about forensics. Next, ask the students what they know about system forensics and why is it required in organizations dependent on IT. This could be a brief discussion of about 5 minutes. Lead the discussion to the objectives of this chapter.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
In this slide you need to show the calculation to determine the sum of an arithmetic progression for bubble sort algorithm. Refer to student guide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
In this slide you need to show the calculation to determine the sum of an arithmetic progression for bubble sort algorithm. Refer to student guide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
In this slide you need to show the calculation to determine the sum of an arithmetic progression for bubble sort algorithm. Refer to student guide.
While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.