| /** |
| * 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.hadoop.util; |
| |
| import java.util.concurrent.locks.Lock; |
| import java.util.concurrent.locks.ReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.slf4j.Logger; |
| |
| /** |
| * This is a wrap class of a {@link ReentrantReadWriteLock}. |
| * It implements the interface {@link ReadWriteLock}, and can be used to |
| * create instrumented <tt>ReadLock</tt> and <tt>WriteLock</tt>. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public class InstrumentedReadWriteLock implements ReadWriteLock { |
| |
| private final Lock readLock; |
| private final Lock writeLock; |
| |
| InstrumentedReadWriteLock(boolean fair, String name, Logger logger, |
| long minLoggingGapMs, long lockWarningThresholdMs) { |
| ReentrantReadWriteLock readWriteLock = new ReentrantReadWriteLock(fair); |
| readLock = new InstrumentedReadLock(name, logger, readWriteLock, |
| minLoggingGapMs, lockWarningThresholdMs); |
| writeLock = new InstrumentedWriteLock(name, logger, readWriteLock, |
| minLoggingGapMs, lockWarningThresholdMs); |
| } |
| |
| @Override |
| public Lock readLock() { |
| return readLock; |
| } |
| |
| @Override |
| public Lock writeLock() { |
| return writeLock; |
| } |
| } |