Examples of com.sleepycat.je.tree.ChildReference.fetchTarget()

com.sleepycat.je.tree.ChildReference.fetchTarget()

Fetch the target object that this ChildReference refers to. If the object is already in VM, then just return the reference to it. If the object is not in VM, then read the object from the log. If the object has been faulted in and the in arg is supplied, then the total memory size cache in the IN is invalidated. @param database The database that this ChildReference resides in. @param in The IN that this ChildReference lives in. Ifthe target is fetched (i.e. it is null on entry), then the total in memory count is invalidated in the IN. May be null. For example, the root is a ChildReference and there is no parent IN when the rootIN is fetched in. @return the Node object representing the target node in the tree, ornull if there is no target of this ChildReference, or null if a pendingDelete or knownDeleted entry has been cleaned.

      if (lnIsDupCountLN) {
    parentDIN = (DIN) node;
    parentDIN.latch(false);
                ChildReference dclRef = parentDIN.getDupCountLNRef();
                lsn = dclRef.getLsn();
                ln = (LN) dclRef.fetchTarget(db, parentDIN);
            } else {
                ln = (LN) node;
            }


            /*

             * the delete info queue when the txn commits. If this is a
             * duplicate tree, we also have to update the duplicate tree count.
             */
            ChildReference dupCountRef = dupRoot.getDupCountLNRef();
            DupCountLN dcl = (DupCountLN)
                dupCountRef.fetchTarget(database, dupRoot);
            dupRoot.releaseLatch();
            LockResult dclGrantAndInfo = locker.lock
                (dcl.getNodeId(), LockType.WRITE, database);
 
            /*

            releaseBIN();
            dupCountRef = dupRoot.getDupCountLNRef();
            long oldDclLsn = dupCountRef.getLsn();
            dclGrantAndInfo.setAbortLsn(oldDclLsn,
                                        dupCountRef.isKnownDeleted());
            dcl = (DupCountLN) dupCountRef.fetchTarget(database, dupRoot);
            dcl.decDupCount();
      assert dcl.getDupCount() >= 0;
            EnvironmentImpl envImpl = database.getDbEnvironment();
            long dupCountLsn =
                dcl.log(envImpl, database.getId(), dupKey, oldDclLsn, locker);

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