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Develop applications

Develop applications that use specific technologies or components, such as portlets, SIP servlets, enterprise beans, web services. Find programming information that focuses on specific concerns, such as security, messaging, transaction support, naming and directory, data access.

This section focuses on developing applications in the WebSphere Application Server full profile application serving environment. If we are using the Liberty profile, see Use the Liberty profile as an application development environment.

Subtopics

• New features overview for developing applications
  View the topics in the following list to learn more about developing applications for deployment on this product.
• Liberty profile: Developing applications
  This page provides a starting point for finding out how to develop applications for the Liberty profile, which provides a highly composable, lightweight, and very quick, application server.
• How do I develop applications?
  Follow these shortcuts to get started quickly with popular tasks.
• Designing applications
  This topic highlights websites and other ideas for finding best practices for designing WebSphere applications, particularly in the realm of WebSphere extensions to the Java EE specification.
• Integrated development environments
  This topic describes obtaining an integrated development environment (IDE). Use Rational products from IBM to design, construct, and manage changes to applications for deployment on your WAS products.
• Debugging applications
  To debug the application, use an IDE like the IBM Rational Application Developer for WebSphere to create a Java project. Then import the program to debug into the project.
• Assemble applications
  Application assembly consists of creating Java EE modules that can be deployed onto application servers. The modules are created from code artifacts such as web application archive (WAR) files, resource adapter archive (RAR) files, EJB JAR files, and application client archive (JAR) files. This packaging and configuring of code artifacts into EAR modules or stand-alone web modules is necessary for deploying the modules onto an application server.
• Class loading
  Class loaders are part of the JVM code and are responsible for finding and loading class files. Class loaders enable applications deployed on servers to access repositories of available classes and resources. Application developers and deployers must consider the location of class and resource files, and the class loaders used to access those files, to make the files available to deployed applications. Class loaders affect the packaging of applications and the runtime behavior of packaged applications of deployed applications.
• Add logging and tracing to the application
  We can add logging and tracing to applications to help analyze performance and diagnose problems in WAS.
• Develop ActivitySessions
  This page provides a starting point for finding information about ActivitySessions, a WebSphere extension for reducing the complexity of commitment rules and limitations associated with one-phase commit resources.
• Develop Application profiling
  This page provides a starting point for finding information about application profiling, a WebSphere extension for defining strategies to dynamically control concurrency, prefetch, and read-ahead.
• Develop Asynchronous beans
  This page provides a starting point for finding information about asynchronous beans.
• Develop applications that use the Bean Validation API
  

  The Bean Validation API is introduced with the Java Enterprise Edition 6 platform as a standard mechanism to validate Enterprise JavaBeans in all layers of an application, including, presentation, business and data access. Before the Bean Validation specification, the JavaBeans were validated in each layer. To prevent the reimplementation of validations at each layer, developers bundled validations directly into their classes or copied validation code, which was often cluttered. Having one implementation that is common to all layers of the application simplifies the developers work and saves time.

• Develop Client applications
  This page provides a starting point for finding information about application clients and client applications. Application clients provide a framework on which application code runs, so that your client applications can access information on the application server.
• Develop Communications Enabled Applications
  CEA is a functionality that provides the ability to add dynamic web communications to any application or business process. WAS v8.5 provides a suite of integrated telephony and collaborative web services that extends the interactivity of enterprise and web commerce applications. With the CEA capability, enterprise solution architects and developers can use a single core application to enable multiple modes of communication. Enterprise developers do not need to have extensive knowledge of telephony or SIP to implement CEA. The CEA capability delivers call control, notifications, and interactivity and provides the platform for more complex communications.
• Develop data access resources
  This page provides a starting point for finding information about data access. Various enterprise information systems (EIS) use different methods for storing data. These backend data stores might be relational databases, procedural transaction programs, or object-oriented databases.
• Develop Dynamic caching
  The dynamic cache service, which improves performance by caching the output of servlets, commands, web services, and JSP (JSP) files.
• Develop Dynamic and EJB query
  This page provides a starting point for finding information about dynamic query, a WebSphere programming extension for unprecedented application flexibility. This information also includes Enterprise JavaBeans query, the Java feature upon which the WebSphere extension is built.
• Develop EJB applications
  This page provides a starting point for finding information about enterprise beans.
• Develop Internationalization service
  This page provides a starting point for finding information about globalization and the internationalization service, a WebSphere extension for improving developer productivity.
• Develop Mail, URLs, and other Java EE resources
  This page provides a starting point for finding information about resources used by applications deployed on a Java EE-compliant application server. They include:
• Develop Messaging resources
  The use of asynchronous messaging resources for enterprise applications with WAS.
• Develop Naming and directory
  This page provides a starting point for finding information about naming support. Naming includes both server-side and client-side components. The server-side component is a Common Object Request Broker Architecture (CORBA) naming service (CosNaming). The client-side component is a JNDI service provider. JNDI is a core component in the Java EE programming model.
• Develop Object pools
  This page provides a starting point for finding information about object pools.
• Develop Object Request Broker (ORB)
  The Object Request Broker (ORB). WAS v8.5 uses an ORB to manage communication between client applications and server applications as well as among product components. These Java EE standard services are relevant to the ORB: Remote Method Invocation/Internet Inter-ORB Protocol (RMI/IIOP) and Java Interface Definition Language (Java IDL).
• Develop OSGi applications
  This page provides a starting point for finding out how to develop OSGi applications.
• Develop Portlet applications
  This page provides a starting point for finding information about portlet applications, which are special reusable Java servlets that appear as defined regions on portal pages. Portlets provide access to many different applications, services, and web content.
• Develop SCA composites
  This page provides a starting point for finding information about SCA composites, which consist of components that implement business functions in the form of services.
• Develop Scheduler service
  The scheduler service, a WebSphere programming extension responsible for starting actions at specific times or intervals.
• Develop security
  Secure specific types of applications, such as applications that include portlets, SIP servlets, enterprise beans, web services. Find security information that focuses on specific concerns, such as messaging, transaction support, naming and directory, data access.
• Develop Startup beans
  This page provides a starting point for finding information about startup beans.
• Develop Service integration
  This page provides a starting point for finding information about service integration.
• Develop SIP applications
  This page provides a starting point for finding information about SIP applications, which are Java programs that use at least one SIP servlet written to the JSR 116 specification.
• Develop Spring applications
  This page provides a starting point for finding information about how to develop Spring applications that can run successfully in a WAS environment.
• Develop Transactions
  This page provides a starting point for finding information about Java Transaction API (JTA) support. Applications running on the server can use transactions to coordinate multiple updates to resources as one unit of work, such that all or none of the updates are made permanent.
• Develop web applications
  This page provides a starting point for finding information about web applications, which are comprised of one or more related files managed as a unit, including:
• Develop web services
  This page provides a starting point for finding information about web services.
• Develop web services - Addressing (WS-Addressing)
  The Web Services Addressing (WS-Addressing) support in this product provides the environment for web services that use the World Wide Web Consortium (W3C) WS-Addressing specifications. This family of specifications provide transport-neutral mechanisms to address web services and to facilitate end-to-end addressing.
• Develop web services - Invocation framework (WSIF)
  The WSIF is a WSDL-oriented Java™ API. You use this API to invoke web services dynamically, regardless of the service implementation format (for example enterprise bean) or the service access mechanism (for example JMS). Using WSIF, we can move away from the usual web services programming model of working directly with the SOAP APIs, towards a model where you interact with representations of the services. We can therefore work with the same programming model regardless of how the service is implemented and accessed.
• Develop web services - Notification (WS-Notification)
  WS-Notification enables web services to use the publish and subscribe messaging pattern.You use publish and subscribe messaging to publish one message to many subscribers. In this pattern a producing application inserts (publishes) a message (event notification) into the messaging system having marked it with a topic that indicates the subject area of the message. Consuming applications that have subscribed to the topic in question, and have appropriate authority, all receive an independent copy of the message that was published by the producing application.
• Develop web services - Reliable messaging (WS-ReliableMessaging)
  To configure a web service application to use WS-ReliableMessaging, you attach a policy set containing a WS-ReliableMessaging policy type. This policy type offers a range of qualities of service: managed persistent, managed non-persistent, or unmanaged non-persistent.
• Develop web services - RESTful services
  We can use Java API for RESTful Web Services (JAX-RS) to develop services that follow REST principles. RESTful services are based on manipulating resources. Resources can contain static or dynamically updated data. By identifying the resources in the application, we can make the service more useful and easier to develop.
• Develop web services - Security (WS-Security)
  The Web Services Security specification defines core facilities for protecting the integrity and confidentiality of a message, and provides mechanisms for associating security-related claims with a message.
• Develop web services - Transaction support (WS-Transaction)
  WS-Transaction is an interoperability standard that includes the WS-AtomicTransaction, WS-BusinessActivity, and WS-Coordination specifications. The Web Services Atomic Transaction (WS-AT) support in the application server provides transactional quality of service to the web services environment. Distributed web services applications, and the resources they use, can take part in distributed global transactions. With Web Services Business Activity (WS-BA) support in the application server, web services on different systems can coordinate activities that are more loosely coupled than atomic transactions. Such activities can be difficult or impossible to roll back atomically, and therefore require a compensation process if an error occurs. Web Services Coordination (WS-COOR) specifies a CoordinationContext and a Registration service with which participant web services can enlist to take part in the protocols that are offered by specific coordination types.
• Develop web services - Transports
  Transport chains represent a network protocol stack used for I/O operations within an application server environment. Transport chains are part of the channel framework function that provides a common networking service for all components.
• Develop web services - UDDI registry
  The Universal Description, Discovery, and Integration (UDDI) specification defines a way to publish and discover information about web services. The UDDI specification defines a standard for the visibility, reusability, and manageability that are essential for a service-oriented architecture (SOA) registry service. The UDDI registry is a directory for web services that is implemented using the UDDI specification. It is a component of WebSphere Application Server.
• Develop Work area
  This page provides a starting point for finding information about work areas, a WebSphere extension for improving developer productivity.
• XML applications
  This page provides a starting point for finding information about XML applications.

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