9 WebLogic Server Messaging

The Java Message Service (JMS) is a standard API for accessing enterprise messaging systems. JMS simplifies application development by providing a standard interface for creating, sending, and receiving messages.

This chapter includes the following topics:

Overview of JMS and WebLogic Server

The WebLogic Server implementation of JMS is an enterprise-class messaging system that is tightly integrated into the WebLogic Server platform and fully supports the JMS 2.0 Specification. The JMS 2.0 Specification is available at http://www.oracle.com/technetwork/java/jms/index.html. WebLogic JMS provides numerous WebLogic JMS Extensions that go beyond the standard JMS APIs.

Java Message Service

An enterprise messaging system enables applications to asynchronously communicate with one another through the exchange of messages. A message is a request, report, and/or event that contains information needed to coordinate communication between different applications. A message provides a level of abstraction, allowing you to separate the details about the destination system from the application code.

The Java Message Service (JMS) is a standard API for accessing enterprise messaging systems that is implemented by industry messaging providers. Specifically, JMS:

• Enables Java applications that share a messaging system to exchange messages

• Simplifies application development by providing a standard interface for creating, sending, and receiving messages

WebLogic JMS supports both client and server applications; in addition to Java, it has client libraries for C APIs and Microsoft .NET. WebLogic JMS accepts messages from producer applications and delivers them to consumer applications. For more information on JMS API programming with WebLogic Server, see Developing JMS Applications for Oracle WebLogic Server. For information about JMS API programming for WebLogic Server hosted consumer applications, see Developing Message-Driven Beans for Oracle WebLogic Server.

WebLogic JMS Message Workflow

The following figure illustrates the WebLogic message workflow.

Figure 9-1 WebLogic JMS Message Workflow

Description of "Figure 9-1 WebLogic JMS Message Workflow"

For information on the major components of the WebLogic JMS architecture, see WebLogic JMS Architecture in Developing JMS Applications for Oracle WebLogic Server.

Roadmap for WebLogic Server Messaging

The WebLogic Server documentation set includes several introductory, procedural, and reference topics, including examples, that help you understand how to develop and administer WebLogic JMS resources.

Table 9-1 Roadmap for WebLogic Server Messaging

Major Task	Subtasks and Additional Information
Learning more about WebLogic Server messaging	WebLogic JMS architecture and environment JMS configuration resources Overview of JMS servers Overview of JMS modules Environment-related system resources for WebLogic JMS Understanding the messaging models Understanding the JMS API Value-added public JMS API extensions
Getting started with WebLogic JMS	Overview of JMS programming Best practices for JMS beginners and advanced users Developing a basic JMS application Overview of JMS resource configuration Value-added WebLogic Server JMS features Integrating remote and foreign JMS providers Sample Applications and Code Examples Troubleshooting WebLogic JMS
Using new WebLogic JMS features	Developing advanced pub/sub applications Interoperating with Oracle advanced queueing Developing JMS .NET Client Applications for Oracle WebLogic Server
Programming WebLogic messaging	Developing JMS Applications for Oracle WebLogic Server Developing advanced pub/sub applications Developing Message-Driven Beans for Oracle WebLogic Server
Understanding clients for WebLogic messaging	Understanding JMS clients WebLogic Server client types and features
Configuring WebLogic messaging	Best practices for JMS beginners and advanced users Administering JMS Resources for Oracle WebLogic Server Integrating remote and foreign JMS providers Administering the Store-and-Forward Service for Oracle WebLogic Server Administering the WebLogic Messaging Bridge for Oracle WebLogic Server Administering the WebLogic Persistent Store
Using the WebLogic Server Administration Console to configure WebLogic messaging	Configuring JMS servers Configuring JMS system modules and resources Configuring store-and-forward for JMS messages Configuring and managing messaging bridges
Performance and tuning	Tuning WebLogic JMS Tuning WebLogic JMS store-and-forward Tuning WebLogic messaging bridge Tuning message-driven beans Tuning logging last resource Tuning the WebLogic Persistent Store
Reference	Javadoc for WebLogic JMS extensions MBean reference JMS schema Java Message Service Specification JMS C API Reference for Oracle WebLogic Server