| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.ignite.internal.processors.cache; |
| |
| import java.util.Collection; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.locks.Condition; |
| import java.util.concurrent.locks.Lock; |
| import javax.cache.CacheException; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.internal.IgniteInternalFuture; |
| import org.apache.ignite.internal.IgniteInterruptedCheckedException; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * |
| */ |
| class CacheLockImpl<K, V> implements Lock { |
| /** Gateway. */ |
| private final GridCacheGateway<K, V> gate; |
| |
| /** */ |
| private final IgniteInternalCache<K, V> delegate; |
| |
| /** Operation context. */ |
| private final CacheOperationContext opCtx; |
| |
| /** */ |
| private final Collection<? extends K> keys; |
| |
| /** */ |
| private int cntr; |
| |
| /** */ |
| private volatile Thread lockedThread; |
| |
| /** |
| * @param gate Gate. |
| * @param delegate Delegate. |
| * @param opCtx Operation context. |
| * @param keys Keys. |
| */ |
| CacheLockImpl(GridCacheGateway<K, V> gate, IgniteInternalCache<K, V> delegate, CacheOperationContext opCtx, |
| Collection<? extends K> keys) { |
| this.gate = gate; |
| this.delegate = delegate; |
| this.opCtx = opCtx; |
| this.keys = keys; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void lock() { |
| CacheOperationContext prev = gate.enter(opCtx); |
| |
| try { |
| checkTx(); |
| |
| delegate.lockAll(keys, 0); |
| |
| incrementLockCounter(); |
| } |
| catch (IgniteCheckedException e) { |
| throw new CacheException(e.getMessage(), e); |
| } |
| finally { |
| gate.leave(prev); |
| } |
| } |
| |
| /** |
| * |
| */ |
| private void incrementLockCounter() { |
| assert (lockedThread == null && cntr == 0) || (lockedThread == Thread.currentThread() && cntr > 0); |
| |
| cntr++; |
| |
| lockedThread = Thread.currentThread(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void lockInterruptibly() throws InterruptedException { |
| tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean tryLock() { |
| CacheOperationContext prev = gate.enter(opCtx); |
| |
| try { |
| checkTx(); |
| |
| boolean res = delegate.lockAll(keys, -1); |
| |
| if (res) |
| incrementLockCounter(); |
| |
| return res; |
| } |
| catch (IgniteCheckedException e) { |
| throw new CacheException(e.getMessage(), e); |
| } |
| finally { |
| gate.leave(prev); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean tryLock(long time, TimeUnit unit) throws InterruptedException { |
| if (Thread.interrupted()) |
| throw new InterruptedException(); |
| |
| if (time <= 0) |
| return tryLock(); |
| |
| CacheOperationContext prev = gate.enter(opCtx); |
| |
| try { |
| checkTx(); |
| |
| IgniteInternalFuture<Boolean> fut = delegate.lockAllAsync(keys, unit.toMillis(time)); |
| |
| try { |
| boolean res = fut.get(); |
| |
| if (res) |
| incrementLockCounter(); |
| |
| return res; |
| } |
| catch (IgniteInterruptedCheckedException e) { |
| if (!fut.cancel()) { |
| if (fut.isDone()) { |
| Boolean res = fut.get(); |
| |
| Thread.currentThread().interrupt(); |
| |
| if (res) |
| incrementLockCounter(); |
| |
| return res; |
| } |
| } |
| |
| if (e.getCause() instanceof InterruptedException) |
| throw (InterruptedException)e.getCause(); |
| |
| throw new InterruptedException(); |
| } |
| } |
| catch (IgniteCheckedException e) { |
| throw new CacheException(e.getMessage(), e); |
| } |
| finally { |
| gate.leave(prev); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void unlock() { |
| CacheOperationContext prev = gate.enter(opCtx); |
| |
| try { |
| if (lockedThread != Thread.currentThread()) { |
| throw new IllegalStateException("Failed to unlock keys (did current thread acquire lock " + |
| "with this lock instance?)."); |
| } |
| |
| assert cntr > 0; |
| |
| cntr--; |
| |
| if (cntr == 0) |
| lockedThread = null; |
| |
| delegate.unlockAll(keys); |
| } |
| catch (IgniteCheckedException e) { |
| throw new CacheException(e.getMessage(), e); |
| } |
| finally { |
| gate.leave(prev); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @NotNull @Override public Condition newCondition() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Verifies there is no ongoing user transaction. |
| * |
| * @throws CacheException |
| */ |
| private void checkTx() throws CacheException { |
| if (delegate.context().tm().inUserTx()) |
| throw new CacheException("Explicit lock can't be acquired within a transaction."); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(CacheLockImpl.class, this); |
| } |
| } |