content: /*
   * 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.ambari.server.logging;
  
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.locks.Condition;
  import java.util.concurrent.locks.ReentrantLock;
  
  import com.google.common.base.Ticker;
  
  /**
   * Implements profiling for a ReentrantLock.
   */
  final class ProfiledReentrantLock implements ProfiledLock {
  
    private final ReentrantLock delegate;
    private final LockProfileDelegate helper;
  
    /**
     * @param delegate the lock to profile
     * @param ticker is the source of time information, replaceable for testing purpose
     * @param label is included in log messages for easier identification of locks (optional, may be empty or null)
     */
    ProfiledReentrantLock(ReentrantLock delegate, Ticker ticker, String label) {
      this.delegate = delegate;
      helper = new LockProfileDelegate(ticker, label, this);
    }
  
    @Override
    public void lock() {
      boolean alreadyOwned = helper.logRequest();
      delegate.lock();
      helper.logRequestCompleted(alreadyOwned, true);
    }
  
    @Override
    public void lockInterruptibly() throws InterruptedException {
      boolean alreadyOwned = helper.logRequest();
      delegate.lockInterruptibly();
      helper.logRequestCompleted(alreadyOwned, true);
    }
  
    @Override
    public boolean tryLock() {
      boolean alreadyOwned = helper.logRequest();
      boolean result = delegate.tryLock();
      helper.logRequestCompleted(alreadyOwned, result);
      return result;
    }
  
    @Override
    public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
      boolean alreadyOwned = helper.logRequest();
      boolean result = delegate.tryLock(timeout, unit);
      helper.logRequestCompleted(alreadyOwned, result);
      return result;
    }
  
    @Override
    public void unlock() {
      delegate.unlock();
      helper.logUnlock();
    }
  
    @Override
    public Condition newCondition() {
      return delegate.newCondition();
    }
  
    @Override
    public boolean isHeldByCurrentThread() {
      return delegate.isHeldByCurrentThread();
    }
  
    @Override
    public Map<String, Long> getTimeSpentWaitingForLock() {
      return helper.getTimeSpentWaitingForLock();
    }
  
    @Override
    public Map<String, Long> getTimeSpentLocked() {
      return helper.getTimeSpentLocked();
    }
  
    @Override
    public Map<String, Integer> getLockCount() {
      return helper.getLockCount();
    }
  
    @Override
    public String getLabel() {
      return helper.getLabel();
    }
  
    @Override
    public String toString() {
      return delegate.toString();
    }
  }
  