Java – how do I know the value associated with a deleted entry in the weakhashmap
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Java
I have such things:
private Map<MyObj1,MyObj2> map = new WeakHashMap<MyObj1,MyObj2>(); ... somewhere in the code ... MyObj1 myObj1 = new MyObj1(); map.put(myObj1,new MyObj2(); ... myObj1 = null; ... somewhere else in a thread ... (I would like to pass to a checkThis(MyObj2) method the Value associated with the entry that was removed from the Map) /* something like this maybe */ while (true) { MyObj2 myObj2 = referenceQueue.remove().get(); checkThis(myObj2); }
The myobj1 key may be deleted when GC comes into play, and there is no strong reference
I want to pass checkthis (myobj2) to the specific map value object associated with the deleted key (may I check a ReferenceQueue?)
I can't figure out how to put it in the code
Solution
Comments from another answer:
This sounds like the work of HttpSessionBindingListener
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