/*
* 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.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import com.google.common.base.Ticker;
/**
* Implements profiling for a ReentrantReadWriteLock.
*/
final class ProfiledReentrantReadWriteLock implements ReadWriteLock {
private final ProfiledReadLock readLock;
private final ProfiledWriteLock writeLock;
/**
* @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)
*/
ProfiledReentrantReadWriteLock(ReentrantReadWriteLock delegate, Ticker ticker, String label) {
readLock = new ProfiledReadLock(delegate, ticker, label);
writeLock = new ProfiledWriteLock(delegate, ticker, label);
}
@Override
public ProfiledLock readLock() {
return readLock;
}
@Override
public ProfiledLock writeLock() {
return writeLock;
}
private static class ProfiledReadLock extends ReentrantReadWriteLock.ReadLock implements ProfiledLock {
private final LockProfileDelegate helper;
private final ReentrantReadWriteLock delegate;
ProfiledReadLock(ReentrantReadWriteLock delegate, Ticker ticker, String label) {
super(delegate);
this.delegate = delegate;
helper = new LockProfileDelegate(ticker, label, this);
}
@Override
public void lock() {
boolean alreadyOwned = helper.logRequest();
super.lock();
helper.logRequestCompleted(alreadyOwned, true);
}
@Override
public void lockInterruptibly() throws InterruptedException {
boolean alreadyOwned = helper.logRequest();
super.lockInterruptibly();
helper.logRequestCompleted(alreadyOwned, true);
}
@Override
public boolean tryLock() {
boolean alreadyOwned = helper.logRequest();
boolean result = super.tryLock();
helper.logRequestCompleted(alreadyOwned, result);
return result;
}
@Override
public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
boolean alreadyOwned = helper.logRequest();
boolean result = super.tryLock(timeout, unit);
helper.logRequestCompleted(alreadyOwned, result);
return result;
}
@Override
public void unlock() {
super.unlock();
helper.logUnlock();
}
/**
* @return true if any thread holds this lock (note that the read lock may be shared between threads, hence the different semantics)
*/
@Override
public boolean isHeldByCurrentThread() {
return delegate.getReadHoldCount() > 0;
}
@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 toString() {
return delegate.readLock().toString();
}
@Override
public String getLabel() {
return helper.getLabel();
}
}
private static class ProfiledWriteLock extends ReentrantReadWriteLock.WriteLock implements ProfiledLock {
private final LockProfileDelegate helper;
private final ReentrantReadWriteLock delegate;
ProfiledWriteLock(ReentrantReadWriteLock delegate, Ticker ticker, String label) {
super(delegate);
this.delegate = delegate;
helper = new LockProfileDelegate(ticker, label, this);
}
@Override
public void lock() {
boolean alreadyOwned = helper.logRequest();
super.lock();
helper.logRequestCompleted(alreadyOwned, true);
}
@Override
public void lockInterruptibly() throws InterruptedException {
boolean alreadyOwned = helper.logRequest();
super.lockInterruptibly();
helper.logRequestCompleted(alreadyOwned, true);
}
@Override
public boolean tryLock() {
boolean alreadyOwned = helper.logRequest();
boolean result = super.tryLock();
helper.logRequestCompleted(alreadyOwned, result);
return result;
}
@Override
public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
boolean alreadyOwned = helper.logRequest();
boolean result = super.tryLock(timeout, unit);
helper.logRequestCompleted(alreadyOwned, result);
return result;
}
@Override
public void unlock() {
super.unlock();
helper.logUnlock();
}
@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 toString() {
return delegate.writeLock().toString();
}
@Override
public String getLabel() {
return helper.getLabel();
}
}
}