By alarmnummer
via java.dzone.com
Published: Jul 14 2008 / 17:20
This blogs presents a problem (and solution!) where it is required to do some manual after an object is garbage collected. A WeakHashMap was not a good solution because it isn't threadsafe (or scalable) and because the key/value should only be removed when some other object is garbage collected (unlike the WeakHashMap where the key/value is removed when the value is garbage collected).
Comments
alarmnummer replied ago:
With a WeakHashMap the key/value is removed, when the key is unreachable, not the value. My mistake.
But that is exactly the problem I have. I have a throw away key (that is composed of other keys) and I don't want entries to be removed when the key gets garbage collected but only when one of the parts of the key gets garbage collected.
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