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About the session tracking of stateful beans

 
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After reading EJB in action, I still wonder exactly how the EE container does session-tracking?

For example:

clientMethod() {
@EJB
StatefulBean sb;
sb.method1();
....
sb.method2();
}

How does the EE container ensure that the same stateful bean is served when method1 and method2 are called?

Is this implemented some lower-level protocol?
 
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well, in your example, sb is an instance of StatefulBean.

This is no session-tracking.
 
Tang Yue
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I know on the hgih abstraction level, developers would see a stateful bean always serving the same client. But how is this implemented by a container?

How does a container see two calls(method1, method2) from the same client and give it the same stateful bean?
 
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