How to use

Lock

in

com.moz.fiji.schema.util

 /** {@inheritDoc} */
 @Override
 public void close() throws IOException {
  mFiji.release();
  mLock.close();
  mZKClient.close();
 }
}

/** {@inheritDoc} */
@Override
public void lock() throws IOException {
 LOG.debug("Locking permissions for instance: '{}'.", mInstanceUri);
 boolean lockSuccessful = mLock.lock(LOCK_TIMEOUT);
 if (!lockSuccessful) {
  throw new FijiSecurityException("Acquiring lock on instance " + mInstanceUri
    + " timed out after " + LOCK_TIMEOUT + " seconds.");
 }
}

/** {@inheritDoc} */
@Override
public void unlock() throws IOException {
 LOG.debug("Unlocking permissions for instance: '{}'.", mInstanceUri);
 mLock.unlock();
}

Preconditions.checkState(state == State.OPEN,
  "Cannot backup SchemaTable instance in state %s.", state);
mZKLock.lock();
List<SchemaTableEntry> entries = Lists.newArrayList();
try {
 mZKLock.unlock();

lock.lock();
try {
 final NavigableMap<Long, FijiTableLayout> layoutMap =
 lock.unlock();
 lock.close();

Preconditions.checkState(state == State.OPEN,
  "Cannot backup SchemaTable instance in state %s.", state);
mZKLock.lock();
List<SchemaTableEntry> entries = Lists.newArrayList();
try {
 mZKLock.unlock();

lock.lock();
try {
 final NavigableMap<Long, FijiTableLayout> layoutMap =
 lock.unlock();
 lock.close();

Preconditions.checkState(state == State.OPEN,
  "Cannot restore backup to SchemaTable instance in state %s.", state);
mZKLock.lock();
try {
 flush();
} finally {
 mZKLock.unlock();

/** {@inheritDoc} */
@Override
public synchronized void close() throws IOException {
 flush();
 final State oldState = mState.getAndSet(State.CLOSED);
 Preconditions.checkState(oldState == State.OPEN,
   "Cannot close SchemaTable instance in state %s.", oldState);
 ResourceTracker.get().unregisterResource(this);
 mZKLock.close();
 mZKClient.close();
}

mZKLock.lock();
try {
 final SchemaTableEntry existingAvroEntry = loadFromHashTable(schemaHash);
 mZKLock.unlock();

Preconditions.checkState(state == State.OPEN,
  "Cannot restore backup to SchemaTable instance in state %s.", state);
mZKLock.lock();
try {
 flush();
} finally {
 mZKLock.unlock();

mZKLock.lock();
try {
 final SchemaTableEntry existingAvroEntry = loadFromHashTable(schemaHash);
 mZKLock.unlock();