Examples of com.sleepycat.je.txn.LockResult

com.sleepycat.je.txn.LockResult
This class is a container to encapsulate a LockGrantType and a WriteLockInfo so that they can both be returned from writeLock.

        nameCursor.latchBIN();
        try {
            final long lsn =
                nameCursor.getBIN().getLsn(nameCursor.getIndex());


            final LockResult lockResult = handleLocker.nonBlockingLock
                (lsn, LockType.READ, true /*jumpAheadOfWaiters*/,
                 nameDatabase);


            if (lockResult.getLockGrant() == LockGrantType.DENIED) {
                nameCursor.getLocker().checkPreempted(null);
                throw EnvironmentFailureException.unexpectedState
                    ("No contention is possible with HandleLocker: " +
                     DbLsn.getNoFormatString(lsn));
            }

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             * initial check prevents a Btree lookup in some cases.
             */
            locker = BasicLocker.createBasicLocker(env, false /*noWait*/);
            /* Don't allow this short-lived lock to be preempted/stolen. */
            locker.setPreemptable(false);
            LockResult lockRet =
                locker.nonBlockingLock(originalLsn, LockType.READ,
                                       false /*jumpAheadOfWaiters*/, db);
            if (lockRet.getLockGrant() == LockGrantType.DENIED) {
                /* Try again later. */
                nPendingLNsLocked.increment();
                lockDenied = true;
                completed = true;
                return;

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             */
            if (lockedPendingLsn != lsn) {
                locker = BasicLocker.createBasicLocker(env, false /*noWait*/);
                /* Don't allow this short-lived lock to be preempted/stolen. */
                locker.setPreemptable(false);
                LockResult lockRet = locker.nonBlockingLock
                    (lsn, LockType.READ, false /*jumpAheadOfWaiters*/, db);
                if (lockRet.getLockGrant() == LockGrantType.DENIED) {


                    /*
                     * LN is currently locked by another Locker, so we can't
                     * assume anything about the value of the LSN in the bin.
                     */

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        /* To prevent DB open, get a write-lock on the MapLN. */
        EnvironmentImpl envImpl = databaseImpl.getDbEnvironment();
        BasicLocker locker = BasicLocker.createBasicLocker(envImpl);
        DatabaseImpl idDatabaseImpl = envImpl.getDbTree().getIdDatabaseImpl();
        try {
            LockResult lockResult = locker.nonBlockingLock
                (lsn, LockType.WRITE, false /*jumpAheadOfWaiters*/,
                 idDatabaseImpl);


            /*
             * The isEvictableInexact result is guaranteed to hold true during
             * LN stripping if it is still true after acquiring the write-lock.
             */
            if (lockResult.getLockGrant() != LockGrantType.DENIED &&
                isEvictableInexact()) {


                /*
                 * While holding both a write-lock on the MapLN, we are
                 * guaranteed that the DB is not currently open.  It cannot be

View Full Code Here

        /* Lock LSN to guarantee deletedness. */
        final BasicLocker lockingTxn = BasicLocker.createBasicLocker(envImpl);
        /* Don't allow this short-lived lock to be preempted/stolen. */
        lockingTxn.setPreemptable(false);
        try {
            final LockResult lockRet = lockingTxn.nonBlockingLock
                (lsn, LockType.READ, false /*jumpAheadOfWaiters*/,
                 checkBin.getDatabase());
            if (lockRet.getLockGrant() == LockGrantType.DENIED) {
                /* Is locked by a resurrected txn. */
                return false;
            }
            return true;
        } finally {

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                 * acquire a non-blocking read lock.
                 */
                locker = BasicLocker.createBasicLocker(env, false /*noWait*/);
                /* Don't allow this short-lived lock to be preempted/stolen. */
                locker.setPreemptable(false);
                LockResult lockRet = locker.nonBlockingLock
                    (treeLsn, LockType.READ, false /*jumpAheadOfWaiters*/, db);
                if (lockRet.getLockGrant() == LockGrantType.DENIED) {


                    /*
                     * LN is currently locked by another Locker, so we can't
                     * assume anything about the value of the LSN in the bin.
                     */

View Full Code Here

            lockingTxn.setPreemptable(false);
            try {
                /* Lock LSN.  Can discard a NULL_LSN entry without locking. */
                final long lsn = getLsn(i);
                if (lsn != DbLsn.NULL_LSN) {
                    final LockResult lockRet = lockingTxn.nonBlockingLock
                        (lsn, LockType.READ, false /*jumpAheadOfWaiters*/, db);
                    if (lockRet.getLockGrant() == LockGrantType.DENIED) {
                        anyLocksDenied = true;
                        continue;
                    }
                }

View Full Code Here

        /*
         * We're reconstructing an unfinished transaction.  We know that there
         * was a write lock on this LN since it exists in the log under this
         * txnId.
         */
        final LockResult result = txn.nonBlockingLock
            (logLsn, LockType.WRITE, false /*jumpAheadOfWaiters*/, db);
        if (result.getLockGrant() == LockGrantType.DENIED) {
            throw EnvironmentFailureException.unexpectedState
               ("Resurrected lock denied txn=" + txn.getId() +
                " logLsn=" + DbLsn.getNoFormatString(logLsn) +
                " abortLsn=" + DbLsn.getNoFormatString(abortLsn));
        }


        /*
         * Set abortLsn and database for utilization tracking.  We don't know
         * lastLoggedSize, so a default will be used for utilization counting.
         * This should not be common.
         */
        result.setAbortLsn(abortLsn, abortKnownDeleted);
        final WriteLockInfo wli = result.getWriteLockInfo();
        if (wli == null) {
            throw EnvironmentFailureException.unexpectedState
               ("Resurrected lock has no write info txn=" + txn.getId() +
                " logLsn=" + DbLsn.getNoFormatString(logLsn) +
                " abortLsn=" + DbLsn.getNoFormatString(abortLsn));

View Full Code Here

        /**
         * Lock the new LSN immediately after logging, with the BIN latched.
         * Lock non-blocking, since no contention is possible on the new LSN.
         */
        if (locker != null) {
            final LockResult lockResult = locker.nonBlockingLock
                (item.newLsn, LockType.WRITE, false /*jumpAheadOfWaiters*/,
                 dbImpl);
            assert lockResult.getLockGrant() != LockGrantType.DENIED:
                   DbLsn.getNoFormatString(item.newLsn);
            lockResult.copyWriteLockInfo(writeLockInfo);
        }
 
        clearDirty();
        return item.newLsn;
    }

View Full Code Here

        /**
         * Lock immediately after assigning a new LSN, with the BIN latched.
         * Lock non-blocking, since no contention is possible on the new LSN.
         */
        if (locker != null) {
            final LockResult lockResult = locker.nonBlockingLock
                (newLsn, LockType.WRITE, false /*jumpAheadOfWaiters*/, dbImpl);
            assert lockResult.getLockGrant() != LockGrantType.DENIED:
                   DbLsn.getNoFormatString(newLsn);
        }


        return newLsn;
    }

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com.sleepycat.je.cleaner.Cleaner

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com.sleepycat.je.tree.BIN

com.sleepycat.je.tree.dupConvert.DupConvert

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