WCF provides a unified programming model for building service-oriented applications. It enables developers to build secure, reliable, and transacted solutions that integrate across platforms and interoperate with existing investments. WCF implements SOAP-based web services as its fundamental communication mechanism and supports WS-* standards for security, reliability, transactions, and metadata exchange. Developers can define services using contracts, expose endpoints using addresses and bindings, and apply behaviors to customize runtime properties.
Overview of Microsoft WCF communication technology (Windows Communication Foundation).
WCF is a unified communication framework for distributed .Net applications.
WCF defines a common programming model and unified API for clients and services to send messages between each other.
WCF is the current and future standard for distributed .Net applications.
One of WCFs core concept is ABC which stands for Address, Binding and Contract.
The address defines a service's location. The binding defines how the service can be accessed and the contract defines the service interface.
This common model allows a uniform programming model for distributed applications not only based on web services, but also on message based transports like MSMQ.
WSDL is an XML-based language used to describe web services. A WSDL document defines services, operations, and messages. It specifies where services are located and how they can be accessed. Key elements include: definitions, types, message, portType, binding, port, and service. WSDL allows clients to discover and interact with web services in a standardized, platform-independent manner.
Web services allow for integration both within and between organizations through standardized XML messaging over the internet. The core technologies that enable web services are SOAP, which defines a standard messaging protocol, WSDL, which describes service interfaces, and UDDI, which allows services to be published and discovered. SOAP uses XML for flexible, self-describing messages and takes advantage of XML features like namespaces and schemas. It defines an envelope, header and body structure. Common uses of web services include processing purchase orders, answering inquiries, and processing shipment requests across organizational boundaries without tight coupling between partners.
Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.
This document provides an introduction to SOAP, WSDL, and UDDI, which together define the architecture for big web services. It discusses what a web service is, the roles of SOAP, WSDL, and UDDI in the web service architecture, how web services differ from conventional middleware like CORBA, an overview of SOAP including its message exchange mechanism and use of RPC, how WSDL is used to describe a web service's interface, and how UDDI allows for service discovery.
This document provides an overview of Enterprise Java Beans (EJB) including:
- The different types of EJB components including session beans, message-driven beans, and entities.
- Session beans can be stateless, stateful, or singleton and their differences are summarized.
- How EJB components are accessed through local, remote, and no-interface views using dependency injection or JNDI lookups.
- Message-driven beans process asynchronous JMS messages.
- Transactions, persistence contexts, and resources can be managed by the EJB container through annotations.
WCF provides a unified programming model for building service-oriented applications. It enables developers to build secure, reliable, and transacted solutions that integrate across platforms and interoperate with existing investments. WCF implements SOAP-based web services as its fundamental communication mechanism and supports WS-* standards for security, reliability, transactions, and metadata exchange. Developers can define services using contracts, expose endpoints using addresses and bindings, and apply behaviors to customize runtime properties.
Overview of Microsoft WCF communication technology (Windows Communication Foundation).
WCF is a unified communication framework for distributed .Net applications.
WCF defines a common programming model and unified API for clients and services to send messages between each other.
WCF is the current and future standard for distributed .Net applications.
One of WCFs core concept is ABC which stands for Address, Binding and Contract.
The address defines a service's location. The binding defines how the service can be accessed and the contract defines the service interface.
This common model allows a uniform programming model for distributed applications not only based on web services, but also on message based transports like MSMQ.
WSDL is an XML-based language used to describe web services. A WSDL document defines services, operations, and messages. It specifies where services are located and how they can be accessed. Key elements include: definitions, types, message, portType, binding, port, and service. WSDL allows clients to discover and interact with web services in a standardized, platform-independent manner.
Web services allow for integration both within and between organizations through standardized XML messaging over the internet. The core technologies that enable web services are SOAP, which defines a standard messaging protocol, WSDL, which describes service interfaces, and UDDI, which allows services to be published and discovered. SOAP uses XML for flexible, self-describing messages and takes advantage of XML features like namespaces and schemas. It defines an envelope, header and body structure. Common uses of web services include processing purchase orders, answering inquiries, and processing shipment requests across organizational boundaries without tight coupling between partners.
Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.
This document provides an introduction to SOAP, WSDL, and UDDI, which together define the architecture for big web services. It discusses what a web service is, the roles of SOAP, WSDL, and UDDI in the web service architecture, how web services differ from conventional middleware like CORBA, an overview of SOAP including its message exchange mechanism and use of RPC, how WSDL is used to describe a web service's interface, and how UDDI allows for service discovery.
This document provides an overview of Enterprise Java Beans (EJB) including:
- The different types of EJB components including session beans, message-driven beans, and entities.
- Session beans can be stateless, stateful, or singleton and their differences are summarized.
- How EJB components are accessed through local, remote, and no-interface views using dependency injection or JNDI lookups.
- Message-driven beans process asynchronous JMS messages.
- Transactions, persistence contexts, and resources can be managed by the EJB container through annotations.
The document discusses sending emails using PHP. It provides the syntax for PHP's mail() function which requires parameters like to, subject, message, headers, and parameters. It also discusses configuring PHP in the php.ini file to send emails and debugging email issues. Common PHP errors like syntax errors, runtime errors, and logical errors are covered as well as basic error handling techniques.
This document provides an introduction to jQuery, including:
- jQuery is a JavaScript library that simplifies HTML document interaction and event handling. It was created by John Resig in 2006.
- The current version is 1.3.2 and version 1.4 is coming soon. John Resig continues to develop jQuery in Boston.
- jQuery selects elements, changes their properties, handles events, and makes AJAX calls to simplify common JavaScript tasks. It works by selecting DOM elements and running functions on the selection.
Hibernate is an object-relational mapping tool that allows developers to more easily write applications that interact with relational databases. It does this by allowing developers to map Java classes to database tables and columns, so that developers can interact with data through Java objects rather than directly with SQL statements. Hibernate handles the conversion between Java objects and database rows behind the scenes. Some key benefits of using Hibernate include faster data retrieval, avoiding manual database connection management, and easier handling of database schema changes.
The document provides an overview of client-server technology, networking concepts like sockets and remote procedure calls, XML, web services, SOAP, and RESTful architectures. It defines key terms like web services, SOAP, WSDL, UDDI, and REST. It describes how SOAP uses XML to define an envelope and headers to package messages and how REST relies on lightweight HTTP to perform CRUD operations on resources identified by URIs.
SOAP is a simple and flexible messaging framework for transferring information specified in the form of an XML infoset between an initial SOAP sender and ultimate SOAP receiver.
This document provides an introduction to XML. It discusses what XML is, its advantages over binary formats, and some common XML languages such as XHTML, SVG, and MathML. It also covers XML rules for documents to be well-formed and valid, and provides examples of XML code.
HTML5 is a new version of HTML that includes new elements and features. It introduces elements for embedding graphics and media, like <canvas> for drawings and <video> and <audio> for media playback. It also includes new form input types, drag and drop functionality, and geolocation. HTML5 provides semantic elements to better describe content. It enables offline web applications and web storage. While browser support is still evolving, many new HTML5 features can already be used today.
This Edureka "Node.js Express tutorial" will help you to learn the Node.js express fundamentals with examples. Express.js is flexible and minimal node.js web application framework that provides robust set of features to develop mobile and web applications. It facilitates the rapid development of node.js applications. Below are the topics covered in this tutorial:
1) Why Express.js?
2) What is Express.js?
3) Express Installation
4) Express Routes
5) Express Middlewares
This document discusses connecting to and interacting with MySQL databases from PHP. It covers connecting to a MySQL database server, selecting databases, executing SQL statements, working with query results, and inserting, updating and deleting records. Functions covered include mysql_connect(), mysql_query(), mysql_fetch_row(), mysql_affected_rows(), and mysql_info(). The document provides examples of connecting to MySQL, selecting databases, executing queries, and accessing and manipulating data.
The document discusses Java Database Connectivity (JDBC) which allows Java applications to connect to databases. It describes the JDBC architecture including drivers, loading drivers, connecting to databases, executing queries and updates using Statement and PreparedStatement objects, processing result sets, and handling exceptions. It also covers transactions, result set metadata, and cleaning up resources.
Server-side programming involves writing code that runs on a web server using languages like Java, PHP, and C#. It processes user input, displays pages, structures applications, and interacts with storage. Client-side programming writes code that runs in the user's browser using JavaScript. In a typical interaction, a user's browser requests a page from a server, which processes the request and returns the page which is then rendered in the browser. Common server-side programming languages and frameworks include PHP, Python, and ASP.Net. Web pages can be static with fixed HTML content or dynamic where the content changes based on server-side processing.
This document provides an overview of Java Server Pages (JSP) technology. Some key points:
- JSP allows separation of work between web designers and developers by allowing HTML/CSS design and Java code to be placed in the same file.
- A JSP page is compiled into a servlet, so it can take advantage of servlet features like platform independence and database-driven applications.
- JSP pages use tags like <jsp:include> and <jsp:useBean> to include content and access JavaBeans. Scriptlets, expressions, declarations, and directives are also used.
- Implicit objects like request, response, out, and session are automatically available in JSP pages
This document discusses ADO.NET, which is a data access technology that allows applications to connect to and manipulate data from various sources. It describes the core ADO.NET objects like Connection, Command, DataReader, DataAdapter, DataSet and DataTable. It also explains the differences between connected and disconnected data access models in ADO.NET, detailing the objects used in each approach and their advantages. Finally, it provides an overview of commonly used .NET data providers like SqlClient, OleDb and Odbc.
This document provides an overview of ExpressJS, a web application framework for Node.js. It discusses using Connect as a middleware framework to build HTTP servers, and how Express builds on Connect by adding functionality like routing, views, and content negotiation. It then covers basic Express app architecture, creating routes, using views with different template engines like Jade, passing data to views, and some advanced topics like cookies, sessions, and authentication.
The wrapper classes in Java are used to convert primitive data types like int and float into objects. There are eight wrapper classes that correspond to the eight primitive types. Wrapper classes allow primitive types to be used in contexts that require objects, like collections. They provide methods to convert between primitive types and their corresponding wrapper class objects.
This document introduces Flask, a Python framework for building web applications. It explains that Flask uses Python decorators to define routes for the web server. Before writing a Flask application, the reader is instructed to install Python, pip, virtualenv, and Flask within a new project directory. The basics of writing a Flask application are then covered, including running the application and defining routes to return responses. The document ends with quiz questions and resources for learning more about Flask.
The document discusses ASP.NET Web API, which is a framework for building HTTP services that can be accessed from various applications and platforms. It supports building RESTful services and maps HTTP verbs to action methods. Web API supports JSON, XML, and BSON formats and can be self-hosted or hosted in IIS. Choosing between Web API and WCF depends on requirements around supported protocols, message exchange patterns, and framework versions. Web API uses controllers and routing to handle requests. It supports configuration, parameters, and custom result types. Media types and formatters are used to serialize requests and responses.
DTD stands for Document Type Definition and is used to define the structure and elements of an XML document. It allows you to create rules for elements within XML documents and ensures XML documents conform to the DTD. A DTD can be internal, within the XML document, or external, in a separate file. It uses elements, attributes, and operators to define elements, attributes, data types, cardinality, and sequences within an XML document.
This document provides an overview of Java servlets including:
- Servlets allow Java code to generate dynamic web page content in response to HTTP requests. They are hosted by a servlet container inside a web server.
- The servlet lifecycle involves initialization, processing requests, and destruction. Common methods are init(), service(), destroy().
- The javax.servlet and javax.servlet.http APIs provide interfaces and classes for building servlets and handling HTTP requests/responses.
- Servlets can collaborate by forwarding or redirecting requests between servlets using methods like RequestDispatcher and HttpServletResponse.
- Session management techniques like cookies, hidden fields, and HTTP sessions allow servlets to maintain state across
This document discusses ADO.NET, which is a set of classes that allows .NET applications to communicate with databases. It provides advantages over classic ADO such as supporting both connected and disconnected data access. The key components of ADO.NET are data providers, which act as bridges between applications and databases, and the DataSet, which allows storing and manipulating relational data in memory disconnected from the database.
This document provides an introduction and overview of Windows Communication Foundation (WCF). It discusses what WCF is, how it differs from web services, and some of its key advantages and disadvantages. Development tools for WCF like Visual Studio are also mentioned. The document concludes by outlining some of the fundamental concepts in WCF like endpoints, bindings, contracts, and messages.
The document discusses sending emails using PHP. It provides the syntax for PHP's mail() function which requires parameters like to, subject, message, headers, and parameters. It also discusses configuring PHP in the php.ini file to send emails and debugging email issues. Common PHP errors like syntax errors, runtime errors, and logical errors are covered as well as basic error handling techniques.
This document provides an introduction to jQuery, including:
- jQuery is a JavaScript library that simplifies HTML document interaction and event handling. It was created by John Resig in 2006.
- The current version is 1.3.2 and version 1.4 is coming soon. John Resig continues to develop jQuery in Boston.
- jQuery selects elements, changes their properties, handles events, and makes AJAX calls to simplify common JavaScript tasks. It works by selecting DOM elements and running functions on the selection.
Hibernate is an object-relational mapping tool that allows developers to more easily write applications that interact with relational databases. It does this by allowing developers to map Java classes to database tables and columns, so that developers can interact with data through Java objects rather than directly with SQL statements. Hibernate handles the conversion between Java objects and database rows behind the scenes. Some key benefits of using Hibernate include faster data retrieval, avoiding manual database connection management, and easier handling of database schema changes.
The document provides an overview of client-server technology, networking concepts like sockets and remote procedure calls, XML, web services, SOAP, and RESTful architectures. It defines key terms like web services, SOAP, WSDL, UDDI, and REST. It describes how SOAP uses XML to define an envelope and headers to package messages and how REST relies on lightweight HTTP to perform CRUD operations on resources identified by URIs.
SOAP is a simple and flexible messaging framework for transferring information specified in the form of an XML infoset between an initial SOAP sender and ultimate SOAP receiver.
This document provides an introduction to XML. It discusses what XML is, its advantages over binary formats, and some common XML languages such as XHTML, SVG, and MathML. It also covers XML rules for documents to be well-formed and valid, and provides examples of XML code.
HTML5 is a new version of HTML that includes new elements and features. It introduces elements for embedding graphics and media, like <canvas> for drawings and <video> and <audio> for media playback. It also includes new form input types, drag and drop functionality, and geolocation. HTML5 provides semantic elements to better describe content. It enables offline web applications and web storage. While browser support is still evolving, many new HTML5 features can already be used today.
This Edureka "Node.js Express tutorial" will help you to learn the Node.js express fundamentals with examples. Express.js is flexible and minimal node.js web application framework that provides robust set of features to develop mobile and web applications. It facilitates the rapid development of node.js applications. Below are the topics covered in this tutorial:
1) Why Express.js?
2) What is Express.js?
3) Express Installation
4) Express Routes
5) Express Middlewares
This document discusses connecting to and interacting with MySQL databases from PHP. It covers connecting to a MySQL database server, selecting databases, executing SQL statements, working with query results, and inserting, updating and deleting records. Functions covered include mysql_connect(), mysql_query(), mysql_fetch_row(), mysql_affected_rows(), and mysql_info(). The document provides examples of connecting to MySQL, selecting databases, executing queries, and accessing and manipulating data.
The document discusses Java Database Connectivity (JDBC) which allows Java applications to connect to databases. It describes the JDBC architecture including drivers, loading drivers, connecting to databases, executing queries and updates using Statement and PreparedStatement objects, processing result sets, and handling exceptions. It also covers transactions, result set metadata, and cleaning up resources.
Server-side programming involves writing code that runs on a web server using languages like Java, PHP, and C#. It processes user input, displays pages, structures applications, and interacts with storage. Client-side programming writes code that runs in the user's browser using JavaScript. In a typical interaction, a user's browser requests a page from a server, which processes the request and returns the page which is then rendered in the browser. Common server-side programming languages and frameworks include PHP, Python, and ASP.Net. Web pages can be static with fixed HTML content or dynamic where the content changes based on server-side processing.
This document provides an overview of Java Server Pages (JSP) technology. Some key points:
- JSP allows separation of work between web designers and developers by allowing HTML/CSS design and Java code to be placed in the same file.
- A JSP page is compiled into a servlet, so it can take advantage of servlet features like platform independence and database-driven applications.
- JSP pages use tags like <jsp:include> and <jsp:useBean> to include content and access JavaBeans. Scriptlets, expressions, declarations, and directives are also used.
- Implicit objects like request, response, out, and session are automatically available in JSP pages
This document discusses ADO.NET, which is a data access technology that allows applications to connect to and manipulate data from various sources. It describes the core ADO.NET objects like Connection, Command, DataReader, DataAdapter, DataSet and DataTable. It also explains the differences between connected and disconnected data access models in ADO.NET, detailing the objects used in each approach and their advantages. Finally, it provides an overview of commonly used .NET data providers like SqlClient, OleDb and Odbc.
This document provides an overview of ExpressJS, a web application framework for Node.js. It discusses using Connect as a middleware framework to build HTTP servers, and how Express builds on Connect by adding functionality like routing, views, and content negotiation. It then covers basic Express app architecture, creating routes, using views with different template engines like Jade, passing data to views, and some advanced topics like cookies, sessions, and authentication.
The wrapper classes in Java are used to convert primitive data types like int and float into objects. There are eight wrapper classes that correspond to the eight primitive types. Wrapper classes allow primitive types to be used in contexts that require objects, like collections. They provide methods to convert between primitive types and their corresponding wrapper class objects.
This document introduces Flask, a Python framework for building web applications. It explains that Flask uses Python decorators to define routes for the web server. Before writing a Flask application, the reader is instructed to install Python, pip, virtualenv, and Flask within a new project directory. The basics of writing a Flask application are then covered, including running the application and defining routes to return responses. The document ends with quiz questions and resources for learning more about Flask.
The document discusses ASP.NET Web API, which is a framework for building HTTP services that can be accessed from various applications and platforms. It supports building RESTful services and maps HTTP verbs to action methods. Web API supports JSON, XML, and BSON formats and can be self-hosted or hosted in IIS. Choosing between Web API and WCF depends on requirements around supported protocols, message exchange patterns, and framework versions. Web API uses controllers and routing to handle requests. It supports configuration, parameters, and custom result types. Media types and formatters are used to serialize requests and responses.
DTD stands for Document Type Definition and is used to define the structure and elements of an XML document. It allows you to create rules for elements within XML documents and ensures XML documents conform to the DTD. A DTD can be internal, within the XML document, or external, in a separate file. It uses elements, attributes, and operators to define elements, attributes, data types, cardinality, and sequences within an XML document.
This document provides an overview of Java servlets including:
- Servlets allow Java code to generate dynamic web page content in response to HTTP requests. They are hosted by a servlet container inside a web server.
- The servlet lifecycle involves initialization, processing requests, and destruction. Common methods are init(), service(), destroy().
- The javax.servlet and javax.servlet.http APIs provide interfaces and classes for building servlets and handling HTTP requests/responses.
- Servlets can collaborate by forwarding or redirecting requests between servlets using methods like RequestDispatcher and HttpServletResponse.
- Session management techniques like cookies, hidden fields, and HTTP sessions allow servlets to maintain state across
This document discusses ADO.NET, which is a set of classes that allows .NET applications to communicate with databases. It provides advantages over classic ADO such as supporting both connected and disconnected data access. The key components of ADO.NET are data providers, which act as bridges between applications and databases, and the DataSet, which allows storing and manipulating relational data in memory disconnected from the database.
This document provides an introduction and overview of Windows Communication Foundation (WCF). It discusses what WCF is, how it differs from web services, and some of its key advantages and disadvantages. Development tools for WCF like Visual Studio are also mentioned. The document concludes by outlining some of the fundamental concepts in WCF like endpoints, bindings, contracts, and messages.
Windows Communication Foundation (WCF) is a Microsoft programming platform and runtime system for building and deploying distributed services. It provides a common platform for all .NET communication and unifies features of previous Microsoft technologies like web services, remoting, and messaging. WCF allows services to expose endpoints that can be accessed over various transports using different bindings and protocols to provide flexibility, reliability, security, and other functionality through configuration. Key concepts in WCF include endpoints, bindings, behaviors, contracts, and the service host.
The document discusses best practices for building Windows Communication Foundation (WCF) services, including when to use WCF services, common tools for working with WCF, hosting and deployment options, exception handling techniques, client proxy patterns, and data contract recommendations. It provides guidance on service design principles, exception handling, hosting, client proxies, and other WCF development topics.
The document discusses Windows Communication Foundation (WCF), Microsoft's unified programming model for building service-oriented applications. It enables developers to build secure, reliable, transacted solutions that integrate across platforms and interoperate with existing investments. Some key points discussed include:
- WCF provides a single unified solution rather than requiring different technologies for different communication styles.
- WCF is designed to interoperate well with non-WCF platforms and technologies from other vendors as well as Microsoft technologies that preceded WCF.
- A WCF service exposes methods through a well-defined XML interface, interacting only through data contracts rather than passing complete classes.
- Services and clients agree on their interface but are otherwise independent,
Web API or WCF - An Architectural ComparisonAdnan Masood
ASP.NET Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices. The new ASP.NET Web API is a continuation of the previous WCF Web API projection. WCF was originally created to enable SOAP-based services and other related bindings. However, for simpler RESTful or RPCish services (think clients like jQuery) ASP.NET Web API is a good choice.
In this meeting we discussed what do you need to understand as an architect to implement your service oriented architecture using WCF or ASP.NET web API. With code samples, we will elaborate on WCF Web API’s transition to ASP.NET Web API and respective constructs such as Service vs. Web API controller, Operation vs. Action, URI templates vs ASP.NET Routing, Message handlers, Formatters and Operation handlers vs Filters, model binders. WebApi offers support for modern HTTP programming model with full support for ASP.NET Routing, content negotiation and custom formatters, model binding and validation, filters, query composition, is easy to unit test and offers improved Inversion of Control (IoC) via DependencyResolver.
You will walk away with a sample set of services that run on Silverlight, Windows Forms, WPF, Windows Phone and ASP.NET.
WCF (Windows Communication Foundation) is Microsoft's latest service-oriented architecture technology for building distributed applications. It provides a common platform for all .NET communication and is the successor to previous message distribution technologies. WCF allows developers to build service-oriented applications and exposes endpoints that define the address, binding, and contract for communicating with clients. Endpoints can be configured programmatically or through configuration files and bindings describe how clients will communicate with services. Services in WCF define contracts including service contracts, data contracts, and message contracts. Services can be hosted in different ways including using IIS, self-hosting, Windows Activation Service, or as a Windows service.
The document provides an introduction to Windows Communication Foundation (WCF) and service-oriented development using WCF. It describes how to create and host a WCF service using Visual Studio 2008, including creating a service interface, service class, and server or host application. It also explains how to consume a WCF service using Visual Studio 2008 through approaches like the ChannelFactory class or adding a service reference. The key components of WCF like endpoints, bindings, and contracts are also defined.
The document discusses REST (REpresentational State Transfer), an architectural style for building distributed systems. It outlines the key constraints and principles of REST like using a uniform interface, stateless operations, and hypermedia as the engine of application state. It also covers how to host and consume REST services using .NET, WCF, and HTTP. Examples of URIs, return formats, and tools for testing REST services are provided.
This document discusses ASP.NET WCF and REST. It provides an overview of the evolution of the web from content-focused to including capabilities. It also discusses REST architectural principles and how WCF supports RESTful services through features like WebGet, WebInvoke, UriTemplate, and WebHttpBinding. The WCF REST Starter Kit is introduced which provides templates and samples for building RESTful services with WCF.
This document provides an agenda and overview for a presentation on software services, including Windows Communication Foundation (WCF) and RESTful WCF. The presentation covers topics such as WCF architecture, endpoints, bindings, contracts, hosting, metadata exchange, instance management, transfer modes, REST principles, and comparisons between SOAP and REST. Code examples are provided to illustrate key WCF concepts.
This document discusses WCF Web APIs and REST architecture. It provides an overview of REST principles like statelessness and uniform interfaces. It then demonstrates how to build a RESTful application in WCF Web APIs to handle orders, payments, and receipts. Resources are used to represent domain objects and activities, and WCF handles communication between the client and service.
The document discusses several WCF concepts and techniques including streaming, message contracts, duplex contracts, creating WCF clients in code, and service discovery. Streaming allows transferring large data in chunks and is supported by some but not all bindings. Message contracts provide full control over SOAP messages. Duplex contracts enable two-way communication between client and server. Creating WCF clients in code provides more control over proxies. Service discovery features announce services and exchange metadata.
This document summarizes a presentation about Windows Communication Foundation (WCF) services for web developers. It discusses WCF programming models including SOAP and RESTful services. It provides an overview of SOAP and REST architectures and common bindings. Examples are given of calling SOAP and REST services. The document also discusses OData and WCF Data Services for exposing data via REST.
Este documento proporciona una introducción a Windows Communication Foundation (WCF). Explica conceptos fundamentales como endpoint, binding, contract y hosting. Define un endpoint como un punto de comunicación que consiste en una dirección, un binding y un contract. El binding define el canal de comunicación, mientras que el contract define las operaciones expuestas por el endpoint. WCF permite alojar servicios en procesos existentes u otros ambientes como IIS.
Learn how to get the best out of Camunda Tasklist, an HTML 5 application for human workflow management. You will also hear how to benefit from the Camunda Javascript forms SDK in your very own frontend applications.
introduction to Windows Comunication Foundationredaxe12
The document discusses Windows Communication Foundation (WCF) and provides an overview of its key capabilities. WCF unifies distributed application development on Windows, allows interoperability with other platforms, and maximizes developer productivity. It brings together existing Microsoft distributed technologies and supports WS-* web services standards.
This document provides an overview of security in Windows Communication Foundation (WCF). It discusses the different WCF bindings and their default security settings. It also covers how to configure WCF security by setting the security mode, client credential type, and credential values. Additional topics include role-based and claims-based authorization, impersonation, and sample security configuration code. The document recommends the WSHttpBinding for default message encryption security and also mentions the BasicHttpBinding and NetMsmqBinding as other options to consider for bindings.
Building Services: .NET FX 3.5, SOAP, REST, and Beyond
Most developers will be aware of various Microsoft technologies to help build SOAP services, the latest of which are WCF and WF in .NET FX 3.5, but there’s another world of services outside SOAP. Recently Microsoft has been very active in its support for, and use of, REST as a mechanism for implementing services. This event will cover recent and forthcoming technologies for building services with SOAP and REST, and we’ll explain REST for the uninitiated.
Agenda:
Session 1: The SOAP Story
In this session we’ll do a lighting quick re-cap of what SOAP is, what specs surround it before looking at how far the SOAP programming model has come in Microsoft’s latest-and-greatest stack – Windows Communication Foundation (WCF) V3.5. We’ll talk about different approaches to building services and we’ll take a good look at the integration between WCF V3.5 and Windows Workflow Foundation (WF) V3.5 which opens up a whole new way of implementing services.
Session 2: Time for a REST
Web applications have evolved; using technologies like AJAX and Silverlight they have rich client-side code that wants to consume services, but they prefer JSON, “plain xml” and REST. In this session we’ll introduce REST for the uninitiated, and we’ll demonstrate some of the new and forthcoming technology that Microsoft has for working with REST: WCF 3.5, Web3S, Windows Live Data, and Codename “Astoria”.
For more details and the original slidedeck visit http://www.microsoft.com/uk/msdn/events/new/Detail.aspx?id=316
This document provides an introduction to Windows Communication Foundation (WCF). It discusses what WCF is, its architecture and fundamentals. It covers topics like hosting, tooling support, handling faults, endpoints, bindings, contracts and more. The key points are that WCF provides a runtime for building service-oriented applications, supports different programming models, and handles messaging, transactions, reliability and security behind the scenes.
Overview of Windows Vista Devices and Windows Communication Foundation (WCF)Jorgen Thelin
The document discusses Windows Communication Foundation (WCF) and how it provides a unified programming model for building service-oriented applications. WCF enables development of loosely-coupled services through features like support for WS-* specifications, compatibility with existing Microsoft distributed application technologies, and integration with Visual Studio 2005. It also discusses how WCF improves productivity over previous technologies and promotes interoperability and service-orientation.
WCF allows for inter-process communication within a local machine or remotely over a network. A WCF service exposes endpoints that clients can connect to in order to exchange messages. Services define contracts that specify their operations. Clients are programs that communicate with service endpoints. WCF supports various transports and message formats and provides tools for generating metadata and clients.
This document provides an overview of Java web services, including key concepts like XML-based communication, loose coupling of services, and support for synchronous and asynchronous calls. It also describes major web service technologies like SOAP, WSDL, and UDDI. Additionally, it outlines Java APIs for building, deploying, and consuming web services and provides an example of creating a simple book ordering service.
This document provides an overview of key concepts in Windows Communication Foundation (WCF), including contracts, bindings, behaviors, and REST support. It discusses how WCF uses contracts to define service operations, data contracts for message types, and message contracts for message structure. It also covers common bindings for different transports, custom bindings, and behaviors for aspects like instancing and throttling. The document introduces REST principles supported in WCF like identifying resources with URIs and using HTTP verbs, and new features in WCF 4 like simplified configuration and WS-Discovery support.
This document discusses web services and how they can be created in ASP.NET using two primary models - the ASP.NET (.asmx) model and the Windows Communication Foundation (WCF) model. It provides details on how to define service contracts, implement and host services, and consume services from a client application for both models. The key aspects covered include defining endpoints, bindings, and contracts as well as attributes used for services, operations, data contracts, and more.
The document discusses various topics related to WCF services including service binding, hosting WCF services, instance management, and exception handling. It describes different bindings like basicHttpBinding, wsHttpBinding, and netTcpBinding. It covers hosting WCF services in IIS, self-hosting, WAS hosting, and Windows service hosting. It defines the different instance context modes of per-call, per-session, and singleton. Finally, it discusses using fault contracts to better handle exceptions in WCF services.
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What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
3. SOA can be simply defined as an architectural
concept or style that uses a set of “loosely
coupled services” to achieve the desired
functionality.
4. Boundaries are Explicit.
Services are Autonomous
Services share schema and contract, not class
Service compatibility is determined based on
policy
5. Services are secure
Services leave the system in a consistent state
Services are thread-safe
Services are reliable
7. WCF is a programming model that enables
developers to build service solutions that are
reliable and secure, and even transacted.
WCF simplifies development of unified,
simplified and manageable distributed
systems
10. Programming model type
1. You can use the object model programmatically.
2. You can use configuration files.
3. You can use declarative programming
(attributes).
The order in which settings are applied is as
follows:
1. Attributes are applied.
2. The configuration is applied.
3. The code runs.
12. What do I send?
Where do I send it?
How should I send it?
Contract
Address
Binding ServiceClient
Endpoint Endpoint
a network address
indicates where the service
is located.
specifies how a client can
communicate with the
endpoint
identifies what operations
are available to the
clients
13. WCF Service Library
◦ WCF Test Client
◦ WCF Configuration Editor
◦ Output is dll
◦ Has app.config file
Website Project Template
◦ Has web.config
◦ Used over asp.net webservice
◦ Has a .svc file
15. It contains information about what a service
does and the type of information it will make
available.
There are three types of contracts:
Data Contract
Message Contract
Service Contract
Operation Contact
17. The service contract expresses the “methods”
that are exposed to the outside world.
using System.ServiceModel;
namespace MyFirstWCF
{
[ServiceContract(Namespace =
"http://Ebusiness30/WCF")]
interface IService
{
[OperationContract]
Operation1( );
[OperationContract]
Operation2( );
}
}
class MyService :
IMyContract
{
public string
MyMethod( )
{
return "Hello WCF";
}
}
18. Define the custom types that you will use as a
parameter or return in your operation
contract
[DataContract(Namespace=" Ebusiness30WCF")]
public class Customer
{
[DataMember(Name=“CustomerName")]
public string Name;
[DataMember(Name=“NID")]
public int id;
[DataMember(Name=“Type")]
private string type;
}
19. use message contracts to control how
properties of your types map to the SOAP
headers and SOAP body
[MessageContract(Namespace=" Ebusiness30/WCF")]
public class Customer
{
[MessageBody(Name=“CustomerName")]
public string Name;
[MessageBody(Name=“NID")]
public int id;
[MessageHeader(Name=“Type")]
private string type;
}
22. Bindings are the mechanism by which communication
details are specified to make connecting to a service’s WCF
endpoint possible
A binding defines how you can communicate with the
service
The binding controls the following:
◦ The transport (HTTP, MSMQ, Named Pipes, TCP)
◦ The channels (one-way, duplex, request-reply)
◦ The encoding (XML, binary,MTOM)
◦ The supported WS-* protocols (WS-Security, WS-Federation, WS-
reliability, WS-Transactions)
Using bindings is a two-step process, as follows
◦ Select the binding from the predefined list of WCF bindings that
you will use for a particular endpoint.
◦ Create an endpoint that utilizes the binding that you have selected
or created.
23. Binding Name
Transport
Encoding
Interop
Security
Session
Transaction
Duplex
Streaming
BasicHttpBinding HTTP/S Text.MTOM BP 1.1 T X
WsHttpBinding HTTP/S Text.MTOM WS T | S X X X
WsDualHttpBinding HTTP/S Text.MTOM WS T | S X X X X
NetTcpBinding TCP Binary .NET T | S X X X X
NetNamedPipesBinding IPC Binary .NET T | S X X X X
NetMsmqBinding MSMQ Binary .NET T | S X
NetPeerTcpBinding P2P Binary .NET T | S X
MsmqIntegrationBinding MSMQ Binary MSMQ T X
T = Transport Security | S = WS-Security
It specifies the communication details required to connect to the
endpoint.
26. An address basically declares “here I am” to the
outside world.
Example
http://localhost/myservice/
protocol domain Service path
27. HTTP
◦ http://domain [:port]/path
HTTPS
◦ https://domain[:port]/path
TCP
◦ net.tcp://domain/path
MSMQ
◦ net.msmq://domain/queue name
Named pipe no port not cross-machine
◦ net.pipe://localhost/path
IIS
◦ http://domain[:port]/virtual directory[.svc file]
28. Base address
◦ enables you to host multiple endpoints under the same
base address
◦ [transport]://[host name][:optional port]/[optional path]
Endpoint address
◦ Endpoint address is where the service is actually listening.
Mex address
◦ Used to obtain metadata of the service
◦ [transport]://[host name][:optional port]/[optional path]
MyServiceMex
32. IIS 6 (ASPNET_WP.EXE / W3wp.exe)
◦ Activation on demand upon client request.
◦ Only supports HTTP/S transport.
Self Hosting
◦ Can be any managed application, i.e. Console or
WinForms application.
◦ Low-level but flexible.
Windows Activation Service (WAS)
◦ Supports all transports.
◦ Will ship with IIS 7 on Vista and Longhorn Server.
Managed Windows Services (NT Services)
33. 33
class HelloHost
{
static void Main(string[] args)
{
ServiceHost host =
new ServiceHost(typeof(HelloService));
host.Open();
// Wait until done accepting connections
Console.ReadLine();
host.Close();
}
}
<%@ Service Language=“C#” Class=“HelloService” %>
http://localhost/HelloService/HelloService.svc
Self-host
WAS/IIS-host
35. Create a service host
Open the host to allow calls in
Close the host to gracefully exit
◦ Calls in progress complete.
◦ Host refuse any further calls even if host process is still
running.
public static void Main ()
{
Uri baseAddress = new Uri ("http://localhost:8000");
using (ServiceHost serviceHost =
new ServiceHost (typeof(MyService), baseAddress))
{
serviceHost.Open ();
// The service can now be accessed.
Console.WriteLine ("Press <ENTER> to terminate service.");
Console.ReadLine ();
}
}
39. Client uses a proxy to consume the service
The proxy
◦ Is CLR interface and class representing the service.
◦ Provides the same operations as service.
◦ Has additional methods for managing the proxy and the
connection.
Generate the proxy
◦ SvcUtil.exe <Base Address> [/out:<file>] [/config:<file>]
◦ When hosted in IIS/WAS
SvcUtil http://localhost/MyService/MyService.svc /out:Proxy.cs
◦ When self-hosting
SvcUtil http://localhost:8000/MyService/ /out:Proxy.cs
SvcUtil net.tcp://localhost:8001/ /out:Proxy.cs
SvcUtil net.pipe://localhost/MyPipe/ /out:Proxy.cs
◦ HTTP transport
Add Service Reference to the project in VS 2005
41. Client needs to instantiate proxy object
◦ Provide the constructor with endpoint
◦ Endpoint section name from config file
Use service methods
Close proxy instance
using (MyContractProxy proxy = new MyContractProxy
("MyEndpoint") )
{
proxy.MyMethod ();
}
42. No Proxy Client
◦ Work directly with channel
ChannelFactory<IMyContract> factory =
new ChannelFactory<IMyContract> ("MyEndpoint");
IMyContract channel = factory.CreateChannel();
channel.MyMethod ();
factory.Close ();
Need to know the contract interface
upfront
44. in this section you will learn how
1. Handle exceptions in the client applications and
services
2. Specify the exception that a WCF can raise
3. Propagate information about exceptions form
service to client
4. Learn about services state
5. Recover service that has failed
6. Detect unrecognized messages sent to the service
by the client application
45. Why SOAP fault and not CLR exception
◦ Simply , CLR exceptions are specific to the.NET
framework, java client application would not
understand the format of a CLR exception raised by
a WCF service
So, Interoperable services built by using the
WCF should convert .NET Framework
exceptions into SOAP faults and follow the
SOAP specification for reporting these faults
to client applications.
47. ServiceMthod{
Try{
service logic that may
generate an exception
}
catch(Exception e )
{
throw new
FaultException(
e.message,
new
FaultCode(“FaultName”)
}
Catching Client side
SeviceCall{
Try{
calling serviceMethod()
}
catch(FaultException e )
{
print e.code.name,
print e.Reason
}
48. Strongly typed exception
◦ A SOAP fault message that contains a sufficient
detail about the exception in order to enable the
user, or an administrator, to understand the reason
for the exception and if possible take any necessary
corrective action.
◦ Use FaultContract attributes in a service contract
◦ Note you cannot use it with one way operations
49.
50. Configure the WCF service to send details
of Unanticipated exceptions
◦ Configuration file
In the <serviceBehaviors> section of the App.config file add this tag in
the <behavior> section
Setting the includeExceptionDetailInFaults attribute to true causes WCF
to transmit the full details of exceptions when it generates SOAP faults
for unanticipated errors.
◦ Programmatically
<serviceDebug includeExceptionDetailInFaults="true"/>
[ServiceBehavior(IncludeExceptionDetailInFaults=true)]
public class ServiceImpl : IService {}
51. May I decide to make it a self study topic or
research that must be given in lab
Or give them a hint about it
Or decide to give it with no examples
Or decide to give it with examples
Summary if I didn’t give it I won’t be upset s
52. when a ServiceHost object enters the Faulted state it triggers Faulted
event . You should subscribe to this event, and provide a method
that attempts to determine the cause, and then abort and restart the
service.// ServiceHost object for hosting a WCF service
ServiceHost HelloworldServiceHost;
HelloworldServiceHost = new ServiceHost(…);
// Subscribe to the Faulted event of the productsServiceHost object
HelloworldServiceHost.Faulted += new
EventHandler(faultHandler);
// FaultHandler method Runs when productsServiceHost enters the
Faulted state
void faultHandler(object sender, EventArgs e)
{
// Examine the properties of the HelloworldServiceHost
object
// and log the reasons for the fault
// Abort the service
HelloWorldServiceHost.Abort();
// Recreate the ServiceHost object
HelloWorldServiceHost = new ServiceHost(…);
// Start the service
HelloWorldServiceHost.Open();
53. If a client application sends a message specifying an action that
the service does not recognize, the service host application
raises the UnknownMessageReceived event. The host application
can catch this event and record the unrecognized message, like
this// ServiceHost object for hosting a WCF service
ServiceHost HelloWorldServiceHost;
HelloWorldServiceHost = new ServiceHost(…);
// Subscribe to the UnknownMessageReceived event of the
HelloWorldServiceHost object
HelloWorldServiceHost.UnknownMessageReceived += new
EventHandler<UnknownMessageReceivedEventArgs>(unknownMessag
e);
// UnknownMessageReceived event handler
void unknownMessage(object sender,
UnknownMessageReceivedEventArgs e)
{
// Log the unknown message
// Display a message to the administrator
MessageBox.Show("A client attempted to send the message
" +
e.Message.Headers.Action);
One of the biggest IT topics today has to be the concept of Service-Oriented Architecture (SOA).
When you want to understand the meaning of something, you usually go to a place that defines it, such as a dictionary. In this case, we turn to the W3C to understand the definition of SOA.
The W3C defines Service-Oriented Architecture as: A set of components which can be invoked and whose interface descriptions can be discovered and published.
Service orientation is not a technology but instead is a design concept
Service orientation uses the best practices for building today’s distributed applications
Tenet 1: Boundaries are Explicit. Based on the underlying concept of encapsulation, this tenet specifies the publishing and consumption of functionality as sets of services that abstract their underlying implementation. With WCF, the attribute-based programming enables developers to explicitly define external service contracts. Without explicitly defining these, nothing within the class will be exposed publicly. In other words, WCF provides an opt-in model for explicitly defining service boundaries.
Tenet 2: Services are Autonomous. Autonomy means we design the system to support the inevitable evolution of the service’s implementation over time. As we build our services, we need to assume that their internal implementation will evolve (be versioned) over time and that our services as well as the services on which we depend could change location at (almost) any time.
Tenet 3: Services share schema and contract, not class. For those of you who are familiar with ASMX - this is exactly how ASMX works: The service publishes a contract that clients use to generate their own code to call the service. No types are shared between service and its clients by default. In addition, neither Service requires knowledge of each others’ internal workings in order to exchange data – they only need the published schemas & contracts
Tenet 4: Service compatibility is determined based on policy. The services communicate through dynamically negotiated communications channels that support the necessary semantics (security, reliability, etc). Service policy statements created automatically based on configuration, class attributes, and method signatures. Client channels automatically configured via retrieved service policy. By “name” means that we reference a well known name in Policy that represents a whole specification of behavior that needs to be used when talking to this endpoint.
Services are secure
A service and its clients must use secure communication. At the very least, the transfer of the message from the client to the service must be secured, and the clients must have a way of authenticating the service. The clients may also provide their credentials in the message so that the service can authenticate and authorize them.
Services leave the system in a consistent state
Conditions such as partially succeeding in executing the client's request are forbidden. All resources the service accesses must be consistent after the client's call. A service must not have any leftovers as a result of an error, such as only partially affecting the system state. The service should not require the help of its clients to recover the system back to a consistent state after an error.
Services are thread-safe
The service must be designed so that it can sustain concurrent access from multiple clients. The service should also be able to handle causality or logical thread reentrancy.
Services are reliable
If the client calls a service, the client will always know in a deterministic manner if the message was received by the service. The messages should also be processed in the order they were sent, not in the order they were received.
Services are robust
The service isolates its faults, preventing them from taking down itself or other services. The service should not require the clients to alter their behavior according to the type of error the service encountered. This helps to decouple the clients from the service on the error-handling dimension
An Address is a network address indicates where the service is located.
A Binding specifies how a client can communicate with the endpoint including transport protocol, encoding, and security requirements.
A Contract identifies what operations are available to the clients
Data Contract
A data contract explicitly stipulates the data that will be exchanged by the service
Message Contract
A message contract lets you customize the type formatting of parameters in SOAP messages
Service Contract
A service contract is what informs the clients and the rest of the outside world what the endpoint has to offer and communicate
16
ServiceContract Parameters
CallbackContract: Gets or sets the type of callback contract. This is useful when using the duplex messaging exchange pattern.
ConfigurationName: Defines the name as used in the configuration file to store the related configuration settings.
Name: Gets or sets the name for the <portType> element in WSDL. The default value is the name of the .NET interface.
Namespace: Gets or sets the namespace for the <portType> element in WSDL. The default value is the namespace of the .NET interface.
HasProtectionLevel: Defines a (read-only) value that indicates the protection level of the service. At the operation level, it is possible to define that the messages of the operation must be encrypted, signed, or both.
ProtectionLevel: Defines the protection level that the binding must support.
SessionMode: Gets or sets a value that defines whether the contract requires the WCF binding associated with the contract to use channel sessions. SessionMode is an enumeration with possible values of allowed, notallowed, and required. The default value is allowed.
OperationContract parameters
Name: Specifies the name of the operation. The default is the name of the operation.
Action: Defines the (WS-Addressing) action of the request message.
AsyncPattern: Indicates that the operation is implemented asynchronously by using a Begin/End method pair.
IsInitiating: Defines a value that indicates whether the method implements an operation that can initiate a session on the server.
IsOneWay: Defines a value that indicates whether an operation returns a reply message.
IsTerminating: Defines a value that indicates whether the operation causes the server to close the session after the reply message is sent.
ProtectionLevel: Defines a value that indicates the protection level of the operation. You can define that the messages of the operation must be encrypted, signed, or both.
ReplyAction: Defines the value of the SOAP action for the reply message of the operation.
DataContract parameters
Name: Defines the name for the data contract, which will also be the name in the XML schema (XSD, WSDL). The default value is the name you defined in .NET.
Namespace: Defines the namespace for the data contract. Use this property to specify a particular namespace if your type must return data that complies with a specific data contract or XML schema.
DataMember parameters
Name: Defines the name for the data contract, which will also be the name in an XML schema (XSD, WSDL). The default value is the name you defined in .NET.
Namespace: Defines the namespace for the data contract. Use this property to specify a particular namespace if your type must return data that complies with a specific data contract or XML schema.
IsRequired: Gets or sets a value that instructs the serialization engine that the member must be present.
Order: Gets or sets the order of serialization and deserialization of a member. This can be important if clients rely on the order of the fields.
EmitDefaultValue: Gets or sets a value that specifies whether to generate a default value of null or 0 for a field or property being serialized.
When using the tcp binding the client and the host must be .net applications tcp higher performance
netNamedPipe – the fastest across machine
WCF provides a default set of bindings that should cover most of your requirements. If the default bindings don’t cover your requirements, you can build your own binding by extending from CustomBinding.
Text.MTOM (Message Transmission Optimization Mechanism) is a W3C standard to balance between efficiency and interoperability. The MTOM encoding transmits most XML in textual form, but optimizes large blocks of binary data by transmitting them as-is, without conversion to text.
Encoding could be Text, Binary and Text.MTOM
WCF supports base addresses, which enables you to host multiple endpoints under the same base address and which shortcuts the duplication of the scheme, host, port, and root path in your configuration.
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If an exception occurs, this code creates a new System.ServiceModel.FaultException object with the details of the exception and throws it
The FaultCode object identifies the fault, note If you don’t create a FaultCode object, the WCF runtime will automatically generate a FaultCode object itself, with the name “Sender” and add it to the SOAP fault sent back to the client.
Throwing a faultexception is very simple and is not useful as it appears , it is not easy to predict what exceptions could occur when invoking WCF service a better solution is to use strongly typed soap faults .
A service contract can include information about any faults that might occur when executing an operation. If an operation in a WCF service detects an exception, it can generate a specific SOAP fault message that it can send back to the client application. The SOAP fault message should contain sufficient detail to enable the user, or an administrator, to understand the reason for the exception and if possible take any necessary corrective action. A client application can use the fault information in the service contract to anticipate faults and provide specific handlers that can catch and process each different fault. These are strongly typed faults
Service side
Create Custom Fault class as a Data contrcat
Use the FaultContract(typeof(your custom class))] attribute before the operation that may cause that exception
Throw the new type by the line throw new FaultException<your custom error>(custom error object)
Client side
Catch(FaultException<your custom class>obj)
{
obj.Detail.(all your class’s fields should appear here)
}
Summary
You should use the generic with the non generic exception handling
If you use strongly typed exceptions, you must specify every exception that an operation can throw in the service contract. If a service throws
a strongly typed exception that is not specified in the service contract, the details of the exception are not propagated to the client
This lack of detail is actually a security feature.
In these cases, you should catch the exception in the service, and if you need to send it to the client, raise an ordinary (non-generic) FaultException
Note:
You can turn the behavior on and off in the configuration file without rebuilding the application
If you enable this behavior in code, you cannot disable it by using the application configuration file