Hi, I have come across some use of locks and latches which I don't understand. One of the lockObject() methods in the lock manager (SinglePool.lockObject(Object, Lockable, Object, int, Latch)) takes a Latch parameter. When this method is used, the specified latch will be released if the lock cannot be obtained immediately, and that page will be re-latched when the lock has been obtained.
Does anyone know what this method is used for? I have tried to find a code path to it from the JDBC methods, but I have not found such a path yet. Actually, I even modified the method so that it threw an exception each time it was called, and ran derbyall and the JUnit tests. Only some of the storeunit tests failed, but they invoke the methods of StoredPage and friends directly, so they don't really count. So, when none of the tests that use our public interface use this kind of locking, when and for what purpose is it used? Thanks, -- Knut Anders
