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Spring Container need to load server resource only once

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I have a Spring bean which refers connection factory to access J2C resource. This code is deployed in webSphere server in 2 jvms load balanced. I had the readAuth method as init-method in bean xml but it was called multiple times during a load test. Since Spring singleton is per bean per container, I assumed there are multiple containers causing it to load multiple times. So I removed the init-method and changed the username and password to static and added null check in get methods. But now also, readAuth method is being called multiple times. I want to ensure this method is called only once per jvm since this method access server resource and connection is timing out during load test.
Please suggest a best approach on how to write this class. Thanks in advance.

Don't get me started about those stupid light bulbs.
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