Examples of com.sleepycat.je.dbi.CursorImpl.positionFirstOrLast()

com.sleepycat.je.dbi.CursorImpl.positionFirstOrLast()
Position the cursor at the first or last record of the databaseImpl. It's okay if this record is deleted. Returns with the target BIN latched! @return true if a first or last position is found, false if thetree being searched is empty.

            cursor.setAllowEviction(true);


            DatabaseEntry keyEntry = new DatabaseEntry();
            DatabaseEntry dataEntry = new DatabaseEntry();


            if (cursor.positionFirstOrLast(true, null)) {


                /* Retrieve the first record. */
                OperationStatus status =
                    cursor.getCurrentAlreadyLatched(keyEntry, dataEntry,
                                                    LockType.NONE, true);

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        try {
            locker = BasicLocker.createBasicLocker(env, false /*noWait*/);
            cursor = new CursorImpl(fileSummaryDb, locker);
            cursor.setAllowEviction(true);


            if (cursor.positionFirstOrLast(true, null)) {


                OperationStatus status = cursor.getCurrentAlreadyLatched
                    (key, data, LockType.NONE, true);


                /* Iterate over all file summary lns. */

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         * CursorImpl.position will be adding it after it finds the bin.
         */
        final CursorImpl dup = beginMoveCursor(false);
        try {
            /* Search for first or last. */
            if (!dup.positionFirstOrLast(first, null)) {
                /* Tree is empty. */
                status = OperationStatus.NOTFOUND;
                assert LatchSupport.countLatchesHeld() == 0:
                    LatchSupport.latchesHeldToString();
            } else {

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