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Can anyone explain what is meant by recursive locking in Java?

Many thanks

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  • 'Recursive' locking would mean that a locking routine calls itself, which doesn't make much sense. Do you mean 'reentrant' locking? Please quote the text that you are trying to understand. Commented Apr 26, 2010 at 9:09
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    To understand recursive locking you first have to understand recursive locking Commented Apr 26, 2010 at 13:49

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recursive locking in java means the same thread can lock the same mutex object twice and won't deadlock

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Intrinsic locks in Java are reentrant. Recursive locking is the single method (correct me if I'm wrong) to ensure "hand-over-hand" locking using intrinsic locks.

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Hand over hand locking uses multiple lock objects (whether monitor or j.u.c.Lock), which can cause deadlocking. Recursive locking uses the same lock with the same thread multiple times
John, I was thinking of a scenario using the intrinsic lock of a guarding LOCK object to navigate a tree vs locking the entire tree. This is where lock reentrancy comes into play