New in JMS 2.0 . . .

This post lists ALL of the new APIs (interfaces/classes/annotations etc.) introduced in JMS 2.0 (part of the Java EE 7 platform). These have been categorized as follows

• API simplification
• Ease of use
• Exception Handling
• Miscellaneous

Here is a quick summary along with some code snippets

API simplification

JMSContext

Simpler abstraction on top of Connection and Session objects which eliminates the need for interacting with these classes/interfaces in order to send/receive messages.

JMSConnectionFactory

Used during JMSContext injection to specify the JNDI name of the JMS ConnectionFactory

JMSProducer and JMSConsumer

As the name suggests, a JMSProducer and JMSConsumer encapsulate the process of sending JMS messages to and from destinations (topics and queues), respectively. Instances to these objects can be obtained from the JMSContext object and they are important from an API ease-of-use perspective. Here is a ‘fluent’ API example

XAJMSContext

Transactional equivalent of the vanilla JMSContext object. The implementation of this interface provides support for JTA within JMS

Ease of use

These annotations empower less reliance on manual/administrative configuration and drive automated deployment of Java EE applications. These are perfect examples of ‘configuration as code’ and invaluable in Cloud (PaaS) deployment scenarios

JMSConnectionFactoryDefinition and JMSConnectionFactoryDefinitions

Specify the JNDI name of one/multiple JMS ConnectionFactory object. This resource will be automatically provisioned at deployment time

JMSDestinationDefinition and JMSDestinationDefinitions

Specify the JNDI name of one/more JMS Destinations (queues/topics). This resource will be automatically provisioned at deployment time

Exception Handling

JMS 1.1 and earlier versions did not have a notion of unchecked exceptions. From JMS 2.0, JMSRuntimeException has been introduced to act as the base/parent from which all other unchecked exceptions have been extended. Here is a list all the new exceptions introduced in JMS 2.0 (these are mostly unchecked versions of their checked counterparts)

• JMSRuntimeException
• IllegalStateRuntimeException
• InvalidClientIDRuntimeException
• InvalidDestinationRuntimeException
• InvalidSelectorRuntimeException
• JMSSecurityRuntimeException
• MessageFormatRuntimeException
• MessageNotWriteableRuntimeException
• ResourceAllocationRuntimeException
• TransactionInProgressRuntimeException
• TransactionRolledBackRuntimeException

Miscellaneous

JMSPasswordCrdential

Used to secure access to JMS provider before attempting any operations using an injected JMSContext object

JMSSessionMode

Specifies session mode to be used during JMSContext injection

That’s it for the new stuff in JMS 2.0 from an API perspective.

Cheers !

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