Thursday Aug 09, 2012

Coherence - Session Sharing between Applications Hosted on Different Application Servers / Hosted on Different WebLogic Domains

Session state in Java Web application is associated with a single (user) browser session. Sometimes there will be a requirement where  the session data has to be shared by "Between Web applications within the EAR" / "Between Web Applications" / "Between EARs" / "Between EARs located in Different Weblogic Server Domains" / "Between EARs located in Different Application Servers".

In weblogic Server there is an option to share session between web applications present within the EAR. But some time there might be a requirement to share the session "Between Web Applications" / "Between EARs" / "Between EARs located in Different Weblogic Server Domains" / "Between EARs located in Different Application Servers". We can achieve this only with the help of caching tool.

Coherence is one of the most popular caching tools available. With help of coherence we will store sessions in a different JVM from where the application is running (application on application server). This session is shared by different JVMs (Different Domains/Different Application Servers etc).
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