Examples with Transaction com.sleepycat.je.Transaction used on opensource projects

Example 71 with Transaction

use of com.sleepycat.je.Transaction in project voldemort by voldemort.

the class BdbStorageEngine method delete.

@Override
public boolean delete(ByteArray key, Version version) throws PersistenceFailureException {
    StoreUtils.assertValidKey(key);
    long startTimeNs = -1;
    if (logger.isTraceEnabled())
        startTimeNs = System.nanoTime();
    Transaction transaction = null;
    try {
        transaction = this.environment.beginTransaction(null, null);
        DatabaseEntry keyEntry = new DatabaseEntry(key.get());
        if (version == null) {
            // unversioned delete. Just blow away the whole thing
            OperationStatus status = getBdbDatabase().delete(transaction, keyEntry);
            if (OperationStatus.SUCCESS == status)
                return true;
            else
                return false;
        } else {
            // versioned deletes; need to determine what to delete
            DatabaseEntry valueEntry = new DatabaseEntry();
            // do a get for the existing values
            OperationStatus status = getBdbDatabase().get(transaction, keyEntry, valueEntry, LockMode.RMW);
            // key does not exist to begin with.
            if (OperationStatus.NOTFOUND == status)
                return false;
            List<Versioned<byte[]>> vals = StoreBinaryFormat.fromByteArray(valueEntry.getData());
            Iterator<Versioned<byte[]>> iter = vals.iterator();
            int numVersions = vals.size();
            int numDeletedVersions = 0;
            // supplied version
            while (iter.hasNext()) {
                Versioned<byte[]> curr = iter.next();
                Version currentVersion = curr.getVersion();
                if (currentVersion.compare(version) == Occurred.BEFORE) {
                    iter.remove();
                    numDeletedVersions++;
                }
            }
            if (numDeletedVersions < numVersions) {
                // we still have some valid versions
                valueEntry.setData(StoreBinaryFormat.toByteArray(vals));
                getBdbDatabase().put(transaction, keyEntry, valueEntry);
            } else {
                // we have deleted all the versions; so get rid of the entry
                // in the database
                getBdbDatabase().delete(transaction, keyEntry);
            }
            return numDeletedVersions > 0;
        }
    } catch (DatabaseException e) {
        this.bdbEnvironmentStats.reportException(e);
        logger.error(e);
        throw new PersistenceFailureException(e);
    } finally {
        attemptCommit(transaction);
        if (logger.isTraceEnabled()) {
            logger.trace("Completed DELETE (" + getName() + ") of key " + ByteUtils.toHexString(key.get()) + " (keyRef: " + System.identityHashCode(key) + ") in " + (System.nanoTime() - startTimeNs) + " ns at " + System.currentTimeMillis());
        }
    }
}

Example 72 with Transaction

use of com.sleepycat.je.Transaction in project voldemort by voldemort.

the class BdbStorageEngine method put.

@Override
public void put(ByteArray key, Versioned<byte[]> value, byte[] transforms) throws PersistenceFailureException {
    long startTimeNs = -1;
    if (logger.isTraceEnabled())
        startTimeNs = System.nanoTime();
    StoreUtils.assertValidKey(key);
    DatabaseEntry keyEntry = new DatabaseEntry(key.get());
    DatabaseEntry valueEntry = new DatabaseEntry();
    boolean succeeded = false;
    Transaction transaction = null;
    List<Versioned<byte[]>> vals = null;
    try {
        transaction = environment.beginTransaction(null, null);
        // do a get for the existing values
        OperationStatus status = getBdbDatabase().get(transaction, keyEntry, valueEntry, LockMode.RMW);
        if (OperationStatus.SUCCESS == status) {
            // update
            vals = StoreBinaryFormat.fromByteArray(valueEntry.getData());
            // compare vector clocks and throw out old ones, for updates
            Iterator<Versioned<byte[]>> iter = vals.iterator();
            while (iter.hasNext()) {
                Versioned<byte[]> curr = iter.next();
                Occurred occurred = value.getVersion().compare(curr.getVersion());
                if (occurred == Occurred.BEFORE)
                    throw new ObsoleteVersionException("Key " + new String(hexCodec.encode(key.get())) + " " + value.getVersion().toString() + " is obsolete, it is no greater than the current version of " + curr.getVersion().toString() + ".");
                else if (occurred == Occurred.AFTER)
                    iter.remove();
            }
        } else {
            // insert
            vals = new ArrayList<Versioned<byte[]>>(1);
        }
        // update the new value
        vals.add(value);
        valueEntry.setData(StoreBinaryFormat.toByteArray(vals));
        status = getBdbDatabase().put(transaction, keyEntry, valueEntry);
        if (status != OperationStatus.SUCCESS)
            throw new PersistenceFailureException("Put operation failed with status: " + status);
        succeeded = true;
    } catch (DatabaseException e) {
        this.bdbEnvironmentStats.reportException(e);
        logger.error("Error in put for store " + this.getName(), e);
        throw new PersistenceFailureException(e);
    } finally {
        if (succeeded)
            attemptCommit(transaction);
        else
            attemptAbort(transaction);
        if (logger.isTraceEnabled()) {
            logger.trace("Completed PUT (" + getName() + ") to key " + key + " (keyRef: " + System.identityHashCode(key) + " value " + value + " in " + (System.nanoTime() - startTimeNs) + " ns at " + System.currentTimeMillis());
        }
    }
}

Example 73 with Transaction

use of com.sleepycat.je.Transaction in project voldemort by voldemort.

the class BdbStorageEngine method releaseLock.

@Override
public void releaseLock(KeyLockHandle<byte[]> handle) {
    Transaction transaction = (Transaction) handle.getKeyLock();
    if (transaction != null) {
        attemptAbort(transaction);
    }
    handle.close();
}

Example 74 with Transaction

use of com.sleepycat.je.Transaction in project voldemort by voldemort.

the class BdbStorageEngine method putAndUnlock.

@Override
public void putAndUnlock(ByteArray key, KeyLockHandle<byte[]> handle) {
    long startTimeNs = -1;
    if (logger.isTraceEnabled())
        startTimeNs = System.nanoTime();
    StoreUtils.assertValidKey(key);
    DatabaseEntry keyEntry = new DatabaseEntry(key.get());
    DatabaseEntry valueEntry = new DatabaseEntry();
    boolean succeeded = false;
    Transaction transaction = null;
    try {
        transaction = (Transaction) handle.getKeyLock();
        valueEntry.setData(StoreBinaryFormat.toByteArray(handle.getValues()));
        OperationStatus status = getBdbDatabase().put(transaction, keyEntry, valueEntry);
        if (status != OperationStatus.SUCCESS)
            throw new PersistenceFailureException("putAndUnlock operation failed with status: " + status);
        succeeded = true;
    } catch (DatabaseException e) {
        this.bdbEnvironmentStats.reportException(e);
        logger.error("Error in putAndUnlock for store " + this.getName(), e);
        throw new PersistenceFailureException(e);
    } finally {
        if (succeeded)
            attemptCommit(transaction);
        else
            attemptAbort(transaction);
        if (logger.isTraceEnabled()) {
            logger.trace("Completed PUTANDUNLOCK (" + getName() + ") to key " + key + " (keyRef: " + System.identityHashCode(key) + " in " + (System.nanoTime() - startTimeNs) + " ns at " + System.currentTimeMillis());
        }
        handle.close();
    }
}