Code simple, but not simpler discusses ways to develop enterprise applications based on "POJOs in Action" by Chris Richardson. Key messages include making everything as simple as possible while avoiding oversimplification, and that every technology has benefits and drawbacks. The document discusses domain models, transaction scripts, encapsulating business logic, accessing databases, handling concurrency, and long transactions. It compares object-relational mapping frameworks to other data access approaches and concurrency patterns like optimistic and pessimistic locking.
Five Keys for Performance Management of Oracle Forms and E-Business SuiteCorrelsense
Today's APM tools do not provide sufficient capabilities to perform real end user monitoring of Oracle applications. While these tools can track basic performance data, most solutions do not cover the entire Oracle E-Business Suite technology stack and it can be challenging to acquire the in-depth visibility needed to properly manage your application's performance.
Join us for a webinar where we will showcase solutions for application support engineers, application owners, QA engineers, Oracle Forms developers and EBS Integrators. Topics include how to:
Isolate problems before end users experience them
Gain visibility into the potential source of bottlenecks in Oracle components
Reduce the risk and overall time to rollout for new applications, Oracle Forms migrations and EBS upgrades
Analyze stress tests to identify, isolate and resolve scalability issues before rolling out to production
Monitor your end user experience with both real-time and historical performance metrics
Speakers: Mia Urman, CEO of OraPlayer Ltd. and Frank Days, VP of Marketing, Correlsense
Introduction to j2 ee patterns online training classQUONTRASOLUTIONS
Quontra Solutions is leading provider of IT career advice, Training and consulting services for IT Professional and corporates across USA. We train individuals or Corporate via online or class Room training in all IT tools and Technologies. We always strive to bring out innovative methods along with the traditional teaching techniques which enhance the overall experience of the students and teachers to extract the return on Investments, high efficiency and scalability. The company’s architecture is based on the insights from the marketplace, business analytics and strategies keeping intact the fundamental principles in mind, helps us to compete and win in today’s environment without changing any quality in training. The support, service and training provided by Quontra solutions for various customers assures a “stay up to date” easy transition from previous to current in terms of technology. Our advertisers and promoters are none other than the clients you have been associated with us for their training needs..
Email Id : info@quontrasolutions.co.uk Website: http://www.quontrasolutions.co.uk
New Approaches to Faster Oracle Forms System PerformanceCorrelsense
Are your end-users complaining that Forms is slow? Ever wonder what the source of the problem is? Want to learn what are the fastest, most effective strategies to improve overall performance and end user experience?
Join us for a webinar where we will showcase best practices for application support engineers, application owners, QA engineers, Oracle Forms developers and EBS Integrators. Topics include:
Minimizing start up times and resource requirements
Improving speed of Forms rendering
Gaining visibility into the potential source of bottlenecks in Oracle components
Speakers: Mia Urman, CEO of OraPlayer Ltd. and Frank Days, VP of Marketing, Correlsense
Flopsar, basado en el concepto de APM (application performance monitoring), es además una herramienta para análisis conductural de aplicaciones y procesos de negocio. Se destaca por su interfaz principal, que es muy innovadora e intuitiva.
The presentation covers a microservices architecture used for AEM-based system.
If we think of highly-scalable enterprise systems it’s worth considering moving from AEM-based design to microservices architecture. In this approach, some bigger logical parts are deployed separately, outside of AEM – all of these parts are called services. Of course, AEM is still there (it’s another service) and plays one of the most important roles - it delivers the user experience, i.e. websites, pages, their layout and static content. Most of the dynamic content though, is provided by other services deployed e.g. as a stand-alone applications on Tomcat or Node.js servers. The assembly of pages served by AEM and the dynamic content from other services is done with use of… another service. Sounds complicated? Although from deployment point of view it’s more complex than simple AEM-based approach, it brings a couple of significant advantages:
* Improved scalability – each service can be scaled separately. If you expect a lot of traffic and the majority of processing is related e.g. to search, then you can add another instance of search service only. You don’t need to replicate the whole system.
* Easier deployment – since the services are independent you can upgrade each of them easily whereas other services remain untouched.
* Faster development – you are not limited to OSGi technology, so you can develop each service with solutions which best suit the service needs.
* Reduced cost and time-to-market – thanks to above, the overall cost of change implementation and time needed to deploy it to production is reduced significantly
Five Keys for Performance Management of Oracle Forms and E-Business SuiteCorrelsense
Today's APM tools do not provide sufficient capabilities to perform real end user monitoring of Oracle applications. While these tools can track basic performance data, most solutions do not cover the entire Oracle E-Business Suite technology stack and it can be challenging to acquire the in-depth visibility needed to properly manage your application's performance.
Join us for a webinar where we will showcase solutions for application support engineers, application owners, QA engineers, Oracle Forms developers and EBS Integrators. Topics include how to:
Isolate problems before end users experience them
Gain visibility into the potential source of bottlenecks in Oracle components
Reduce the risk and overall time to rollout for new applications, Oracle Forms migrations and EBS upgrades
Analyze stress tests to identify, isolate and resolve scalability issues before rolling out to production
Monitor your end user experience with both real-time and historical performance metrics
Speakers: Mia Urman, CEO of OraPlayer Ltd. and Frank Days, VP of Marketing, Correlsense
Introduction to j2 ee patterns online training classQUONTRASOLUTIONS
Quontra Solutions is leading provider of IT career advice, Training and consulting services for IT Professional and corporates across USA. We train individuals or Corporate via online or class Room training in all IT tools and Technologies. We always strive to bring out innovative methods along with the traditional teaching techniques which enhance the overall experience of the students and teachers to extract the return on Investments, high efficiency and scalability. The company’s architecture is based on the insights from the marketplace, business analytics and strategies keeping intact the fundamental principles in mind, helps us to compete and win in today’s environment without changing any quality in training. The support, service and training provided by Quontra solutions for various customers assures a “stay up to date” easy transition from previous to current in terms of technology. Our advertisers and promoters are none other than the clients you have been associated with us for their training needs..
Email Id : info@quontrasolutions.co.uk Website: http://www.quontrasolutions.co.uk
New Approaches to Faster Oracle Forms System PerformanceCorrelsense
Are your end-users complaining that Forms is slow? Ever wonder what the source of the problem is? Want to learn what are the fastest, most effective strategies to improve overall performance and end user experience?
Join us for a webinar where we will showcase best practices for application support engineers, application owners, QA engineers, Oracle Forms developers and EBS Integrators. Topics include:
Minimizing start up times and resource requirements
Improving speed of Forms rendering
Gaining visibility into the potential source of bottlenecks in Oracle components
Speakers: Mia Urman, CEO of OraPlayer Ltd. and Frank Days, VP of Marketing, Correlsense
Flopsar, basado en el concepto de APM (application performance monitoring), es además una herramienta para análisis conductural de aplicaciones y procesos de negocio. Se destaca por su interfaz principal, que es muy innovadora e intuitiva.
The presentation covers a microservices architecture used for AEM-based system.
If we think of highly-scalable enterprise systems it’s worth considering moving from AEM-based design to microservices architecture. In this approach, some bigger logical parts are deployed separately, outside of AEM – all of these parts are called services. Of course, AEM is still there (it’s another service) and plays one of the most important roles - it delivers the user experience, i.e. websites, pages, their layout and static content. Most of the dynamic content though, is provided by other services deployed e.g. as a stand-alone applications on Tomcat or Node.js servers. The assembly of pages served by AEM and the dynamic content from other services is done with use of… another service. Sounds complicated? Although from deployment point of view it’s more complex than simple AEM-based approach, it brings a couple of significant advantages:
* Improved scalability – each service can be scaled separately. If you expect a lot of traffic and the majority of processing is related e.g. to search, then you can add another instance of search service only. You don’t need to replicate the whole system.
* Easier deployment – since the services are independent you can upgrade each of them easily whereas other services remain untouched.
* Faster development – you are not limited to OSGi technology, so you can develop each service with solutions which best suit the service needs.
* Reduced cost and time-to-market – thanks to above, the overall cost of change implementation and time needed to deploy it to production is reduced significantly
Optimizing Your Management for Business ExpansionAmanda Collette
Efficient business management is a must especially if you're planning to expand. Among the first things you should establish to ensure your business runs smoothly are systems for your employees covering job descriptions, delegation, compensation and training. Read this document from Alliance Accounting for details.
Automation has come a long way in the last 15 years. This presentation tells the story of my journey from no automation, to running in excess of 1000 tests a day. It shares my insights, failures, successes and lessons learned, so hopefully you can get there too.
Optimizing Your Management for Business ExpansionAmanda Collette
Efficient business management is a must especially if you're planning to expand. Among the first things you should establish to ensure your business runs smoothly are systems for your employees covering job descriptions, delegation, compensation and training. Read this document from Alliance Accounting for details.
Automation has come a long way in the last 15 years. This presentation tells the story of my journey from no automation, to running in excess of 1000 tests a day. It shares my insights, failures, successes and lessons learned, so hopefully you can get there too.
Decision CAMP 2014 - Erik Marutian - Using rules-based gui framework to power...Decision CAMP
In this presentation we will describe our experience developing with a highly dynamic web application for a large bank using rules-based technology. We needed to:
build new as well as to enhance existing systems to comply with customer due diligence
apply a business rules management system to present a complex user interaction logic and to dynamically control completeness of a complex client onboarding process spread out through multiple systems and channels.
We selected OpenRules Dialog to be used as a general purpose rule engine as well as to replace graphical components (a survey type dynamic web based application) behind one of the channels.
By replacing one of the original components with the OpenRules GUI Framework, we were able to:
Dramatically reduce components cost and schedule:
The cost in our specific example was reduced by a factor of 10
The schedule, at the same time, was also reduced from 6 months to 2 months
Improve overall user experience:
Flexibility of the framework allowed meeting all specific business UX requirements. Even those that the original component could not meet.
Simplify maintenance and escape vendor “lock in”:
The “open source” nature meant that we owned all pieces of the framework at any time.
In additional, the framework allowed developing all requirements with minimal customization to the core features.
We will demo our web application with explanations how quite complex presentation and interaction logic was implemented using intuitive, business-oriented decision tables in MS Excel.
Hybernat and structs, spring classes in mumbai
best Hybernat and structs, spring classes in mumbai with job assistance.
our features are:
expert guidance by it industry professionals
lowest fees of 5000
practical exposure to handle projects
well equiped lab
after course resume writing guidance
Single Page Applications: Your Browser is the OS!Jeremy Likness
Single Page Applications have gained tremendous popularity over the past few years and have prompted the creation of several frameworks to support their development. Unlike traditional web applications, most of the heavy lifting for SPA happens on the client side in your web browser. These applications rely on hundreds of lines of JavaScript coupled with asynchronous web service calls to provide a desktop-like experience that is accessible from virtually any device.
Join Principal Architect, Jeremy Likness, to learn more about SPA, including how to determine when you should choose this approach, how SPA compares and contrasts with traditional server-based approaches including ASP.NET WebForms and MVC, and what frameworks and tools (such as jQuery, AngularJS, and Aurelia) make building SPA easier. Discover how single page applications powered by HTML5 and JavaScript transform your browser into a web-based operating system.
The microservice architectural style is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API.
In this slide we have discussed, Monolithic application vs Microservices, applicable scenarios for adopting the architectural pattern, when we need microservices, what are the benefits, case study of an e-commerce platform by compartmentalizing the scopes into different sample microservices and Docker implementations.
The full talk has been recorded here: https://youtu.be/tNlp7HS533g
Debugging,Troubleshooting & Monitoring Distributed Web & Cloud Applications a...Theo Jungeblut
In the past, applications where created as monolithic entities running on a single server. If this is the past for you, too, you will have experienced the downside of modern distributed and cloud applications, as debugging, troubleshooting, and monitoring is not easily accomplished with traditional approaches.
Within this session, we will explore different possibilities for collecting and analyzing the needed information to solve issues on modern distributed application and discuss the advantages and disadvantages of each approach like debugger, log files, performance counter and third party solutions. The focus of this session will be on Developer and DevOps need, as increased release cycles and third party dependency more and more result in the need for troubleshooting also on production system, rather than in an isolated test environment.
This session requires a solid understanding of distributed applications and knowledge of SOA, but most principles also apply to and can be beneficial for more traditional application design approaches. The used code examples are in .NET but the shown principles generally apply to other languages, too, and shown software is often available for a variety of environments.
AMC Squarelearning Bangalore is the best training institute for a career development. it had students from various parts of the country and even few were from West African countries.
How can Oracle Forms (or other legacy) applications be modernized to fit in a contemporary IT architecture? Trends, concepts and technologies are discussed.
Optimus XPages: An Explosion of Techniques and Best PracticesTeamstudio
Are you starting a new XPages project, but not sure it’s going to be done right the first time? Do you have an existing application that doesn’t seem to have that “X” Factor? In this webinar, John Jardin demonstrates how XPages developers can apply proven techniques and best practices to take their applications to a game-changing level.
You'll learn how to:
-Rapidly develop responsive applications,
-Improve user experience and response times with background and multi-threaded operations,
-Keep your XPages lightweight with code injection,
-Create scheduled tasks the XPages way,
-And much more.
This is a small introduction to microservices. you can find the differences between microservices and monolithic applications. You will find the pros and cons of microservices. you will also find the challenges (Business/ technical) that you may face while implementing microservices.
4. You have to design enterprise
applications at some moment
But how to develop this skill if:
• There are no appropriate trainings
• The Internet usually provides little,
contradictory and out of date knowledge
• People tell you “lie”
• Etc.
?
7. POJOs in Action (2006)
• shows how to address many common and
complex design issues in back-end logic
development of enterprise applications with
fantastic real-world examples
• combines best practices and design wisdom to
integrate domain-driven design and test-driven
development for object-oriented applications
• carefully explains the techniques and
technologies used at various levels, including
Spring, JDO, Hibernate, EJB 3, and iBatis.
8. Key Messages
• Regardless of how the frameworks evolve,
there are some key concepts that will not
change
• Every technology has both benefits and
drawbacks
• Make everything as simple as possible, but
not simpler (Albert Einstein)
13. Benefits and Drawbacks
+ Improved maintainability and extensibility
+ Persistence framework enables you to easily
map the domain model to the database
- You should have good OOD skills
15. Benefits and Drawbacks
+ Easy to Use (no OOD skill required)
+ Can use full range of SQL features
- Code can be difficult to understand and
maintain (complex business logic, explicit load
and save all required data)
- Cost of maintaining handwritten SQL (e.g. add
a column – change multiple queries)
- Lack of portability of SQL
16. When to Use
• The application must use SQL directly or you
cannot use a persistence framework
• The business logic is very simple
• The development team lacks the necessary
OO design skills
19. Benefits and Drawbacks
+ Business Logic is encapsulated and is free of
transaction management (including distributed
transactions), security, remote access, detaching
objects, etc.
- You must write extra code
- It is quite easy for the detachment code and
the presentation tier to get out of sync and for
the POJO façade to only return some of the
objects required by the presentation tier
21. Benefits and Drawbacks
+ Faster development (the business tier does not
contain façades or error-prone detachment logic)
- Less encapsulation (it is quite easy for business
logic to creep into the presentation tier; the
presentation tier has access to the domain objects;
business tier changes affect presentation tier)
- No support for remote access
- Tricky to configure interactions between
transactions, persistence framework, and the
servlet API
23. What’s wrong with using JDBC directly
• Developing and maintaining SQL is difficult
and time consuming
• There is a lack of portability with SQL
• Writing JDBC code is time consuming and
error-prone
24. What if I need SQL?
• You must use the full power of SQL, including
vendor-specific features, in order to get good
performance
• Your DBA might demand complete control over
the SQL statements executed by your
application
• The corporate investment in its relational
databases is so massive that the applications
working with the databases can appear
relatively unimportant
25. iBatis
• Insulates the application from connections
and prepared statements, iBATIS maps
JavaBeans to SQL statements using XML
descriptor files or annotations
• Supports for database-generated primary
keys, automatic loading of related
objects, caching, and lazy loading
26. Why you don’t want to persist objects
yourself
1. Lazy Loading (loading all of the objects that
might be accessed might be extremely
inefficient)
2. Writing back to the database only those objects
that have been modified (it would be extremely
inefficient to save all objects regardless of
whether they have changed)
3. The database access code must preserve object
identity by ensuring that there is a single in-
memory instance of a persistent object when
processing a request
28. Кey features of an ORM framework
• Declarative mapping between the object model
and database schema
• An API for creating, reading, updating, and
deleting objects
• A query language
• Support for transactions
• Lazy and eager loading
• Caching
• Detached objects
29. Benefits and Drawbacks
+ Improved productivity
+ Improved performance
+ Improved portability
+- Sometimes you must use SQL directly
(performance, etc.)
- Challenging when you’re working with a legacy
schema (e.g. denormalized)
- You might design a domain model that cannot be
mapped to the desired database schema
32. Isolated Database Transactions
• The database ensures that the outcome of
executing multiple serializable transactions is
the same as executing them serially.
• Serializable transactions prevent such
problems as lost updates and inconsistent
reads
33. Benefits and Drawbacks
+ They are simple to use
+ They prevent many concurrency
problems, including lost updates and
inconsistent reads
- They produce the high overhead, which can
reduce performance and scalability
- Fully isolated transactions can fail more
frequently than less isolated transactions
because of deadlocks and other concurrency-
related issues
34. When to Use
• Read consistency is essential
• The overhead of fully isolated transactions is
acceptable
36. Benefits and drawbacks
+ Unlike optimistic locking, pessimistic locking does not
require any schema changes
+ It prevents a transaction from overwriting another
transaction’s changes
+ It reduces the probability of deadlocks in databases that
implement fully isolated transactions by locking rows
when they read
- All potentially conflicting transactions have to use
SELECT FOR UPDATE in order for pessimistic locking to
work, which is potentially error-prone
- Some databases have limitations on how SELECT FOR
UPDATE can be used
37. When to Use
• The database schema does not support
optimistic locking because, for example, the
tables do not have a version or timestamp
column or contain values such as floats or
blobs that cannot be compared
• The application requires some degree of read
consistency
• You don’t want to incur the overhead of
serializable transactions
39. Benefits and Drawbacks
+ It is easy to implement and it is supported by
many persistence frameworks
+ Unlike pessimistic locking, does not prevent an
application from using certain SQL SELECT
statement features
- All potentially conflicting transactions must use
optimistic locking or errors will occur
- No guarantee that a transaction will be able to
update the rows that it read
- Does not prevent inconsistent reads
40. When to Use
General recommendation is that an application
should use optimistic locking unless:
• The database schema does not support
optimistic locking
• The application must be guaranteed to be
able to update the rows that it read
• The application requires consistent reads
43. What’s wrong with using a single
database transaction
• The database transaction would be long-
running because it encompasses multiple web
requests and user think time
• The transaction might last until the web
session timed out if the user could simply walk
away from the browser without completing
the use case
• It reduce scalability and concurrency
45. Benefits and Drawbacks
+ Ensures that a user can save changes
- Impacts the application globally (don’t forget
to use it in a new code, etc.)
- Requires a mechanism to forcibly release locks
46. When to Use
• The probability of conflicts is high
• The consequences of conflicts are severe
• Users typically do not abandon their sessions
or it’s feasible to implement a lock cleanup
mechanism
48. Benefits and Drawbacks
+ It is relatively easy to implement
+ Unlike the Pessimistic Offline Lock pattern, there are no
locks to clean up if the user abandons the session,
which is not uncommon in a web application.
- Because the Optimistic Offline Lock pattern only detects
changes when the user tries to save their changes, it
only works well when starting over is not a burden on
the user
- All transactions that update shared data must increment
the version number whenever they update a row,
including those that do not use the Optimistic Offline
Lock pattern
49. When to Use
• The probability of conflicts is low and the
consequences of redoing the changes are
minimal
• Users regularly abandon sessions and you
don’t want to implement a lock cleanup
mechanism
This mechanism assumes that concurrent updates will occur and so incurs an overhead regardless of whether they do.
Optimistic locking derives its name from the fact it assumes that concurrent updates are rare and that instead of preventing them the application detects and recovers from them.