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Bug 370391

Summary:	Make clients more robust by adding server failover support
Product:	[Technology] OSEE	Reporter:	Ryan Brooks <ryan.d.brooks>
Component:	OSEE Application Framework	Assignee:	Swapna Mising name <swapna.r>
Status:	ASSIGNED ---	QA Contact:
Severity:	enhancement
Priority:	P3
Version:	0.9.9
Target Milestone:	0.9.9
Hardware:	All
OS:	All
Whiteboard:

Description Ryan Brooks

2012-02-01 23:42:50 EST

While there maybe multiple application servers running, currently the client is not fault tolerant because it only performs arbitration once.

Use this failover strategy  instead: http://openejb.apache.org/ejb-failover.html

Comment 1 Ryan Brooks

2012-02-08 23:58:15 EST

Perhaps the best first step would be to get HTTP requests to failover working using a fixed list of alternative servers.  Once that is working to then add support for a dynamic alternative server list.

In org.eclipse.osee.framework.core.util.HttpProcessor both post() methods (this method is overloaded) utilizes the class org.apache.commons.httpclient.methods.PostMethod with the class org.apache.commons.httpclient.DefaultHttpMethodRetryHandler for handling retries upon failure.

The first option that comes to mind to hook in support for server failover would be to extend HttpMethodRetryHandler to make a customer handler.  However, that will probably not let you have the request directed to a different server.