February 2004
Intermediate to advanced
848 pages
27h 25m
English
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Clustered JMS
Even though a JMS server is pinned to a single WebLogic instance, WebLogic is able to provide a clustered implementation of JMS that offers scalability and load balancing at various levels of client access, as well as high-availability features to ensure that a pinned service such as the JMS server doesn’t present a single point of failure to dependent JMS applications. WebLogic’s JMS implementation is able to achieve this through a number of features:
JMS clients can remain unaware of the exact locations of the JMS resources deployed to the cluster. The JNDI name of a JMS destination is made available to all servers in the cluster because it is bound in the cluster-wide JNDI tree. An external client need only use the JNDI name to look up the desired location, without consideration of which physical server hosts the destination. This provides cluster-wide, transparent access to the destinations.
JMS connection factories can be targeted to all members of a cluster, even to those that do not host a JMS server. When a connection factory produces a connection, it automatically will target one of the servers hosting a connection factory using a load-balancing scheme. The servers that host these connections transparently route traffic through to the required destinations. This allows WebLogic to transparently load-balance remote JMS connections to the cluster, and also provide failover in the event of a server failure.
WebLogic lets you configure multiple JMS destinations ...
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