JMS Adapter

JMS Adapter:

Oracle JCA Adapter for JMS (Oracle JMS Adapter), which enables an Oracle BPEL process or an Oracle Mediator component to Interact with Java Messaging Service.

The JMS as Two Modelling:

1. Point-to-point.

2. Pubish-Subsribe.

1.  Point-to-point(Queue):

In the point-to-point domain, messages are exchanged through a queue and each message is delivered to only one receiver.

In point-to-point messaging, the messages are stored in a queue until they are consumed. One or more producers write to the queue and one or more consumers extract messages from the queue. The JMS consumer sends an acknowledgment after consumption of a message.

2.  Pubish-Subsribe(Topic):

In the publish-subscribe model, messages are sent to a topic and can be read by many subscribed clients.

In publish/subscribe messaging, producers publish messages to a topic, and the consumer subscribes to a particular topic. Many publishers can publish to the same topic, and many consumers can subscribe to the same topic. All messages published to the topic by the producers are received by all consumers subscribed to the topic. By default, subscribers receive messages only when the subscribers are active. However, JMS API supports durable subscriptions that ensure that consumers receive messages that were published even when the subscribers are not up and running. The durable subscription involves registering the consumer with a unique ID for retrieving messages that were sent when the consumer was inactive. These messages are persisted by the JMS provider and are either sent to the consumer when it becomes active.

This Oracle JMS working with any JMS Providers like:

AQ JMS, TIBCO JMS, IBM Web sphere (MQ Series JMS), Web logic JMS, Apache and Active MQ.

Oracle JMS Features:

è    Oracle JMS Adapter Support Queues and Topic.

è    Oracle JMS Adapter provides support to stream payload. When you enable this

Feature used for storing large message payloads into the Queue or Topic.

Asynchronous communication, guaranteed message delivery, receipt notification, and transaction control. JMS is a Java interface developed by Sun Microsystems for producing, sending, and receiving messages of an enterprise messaging system. JMS is an API that JMS vendors implement. Oracle provides two implementations of JMS, WLS JMS and Oracle JMS based on Oracle advanced queues. A JMS producer creates JMS messages and a JMS consumer consumes JMS messages.