| /* |
| * 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.hbase.thrift; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| /** |
| * A BlockingQueue reports waiting time in queue and queue length to |
| * ThriftMetrics. |
| */ |
| @InterfaceAudience.Private |
| public class CallQueue implements BlockingQueue<Runnable> { |
| private static Log LOG = LogFactory.getLog(CallQueue.class); |
| |
| private final BlockingQueue<Call> underlyingQueue; |
| private final ThriftMetrics metrics; |
| |
| public CallQueue(BlockingQueue<Call> underlyingQueue, |
| ThriftMetrics metrics) { |
| this.underlyingQueue = underlyingQueue; |
| this.metrics = metrics; |
| } |
| |
| private static long now() { |
| return System.nanoTime(); |
| } |
| |
| public static class Call implements Runnable { |
| final long startTime; |
| final Runnable underlyingRunnable; |
| |
| Call(Runnable underlyingRunnable) { |
| this.underlyingRunnable = underlyingRunnable; |
| this.startTime = now(); |
| } |
| |
| @Override |
| public void run() { |
| underlyingRunnable.run(); |
| } |
| |
| public long timeInQueue() { |
| return now() - startTime; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other instanceof Call) { |
| Call otherCall = (Call)(other); |
| return this.underlyingRunnable.equals(otherCall.underlyingRunnable); |
| } else if (other instanceof Runnable) { |
| return this.underlyingRunnable.equals(other); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.underlyingRunnable.hashCode(); |
| } |
| } |
| |
| @Override |
| public Runnable poll() { |
| Call result = underlyingQueue.poll(); |
| updateMetrics(result); |
| return result; |
| } |
| |
| private void updateMetrics(Call result) { |
| if (result == null) { |
| return; |
| } |
| metrics.incTimeInQueue(result.timeInQueue()); |
| metrics.setCallQueueLen(this.size()); |
| } |
| |
| @Override |
| public Runnable poll(long timeout, TimeUnit unit) throws InterruptedException { |
| Call result = underlyingQueue.poll(timeout, unit); |
| updateMetrics(result); |
| return result; |
| } |
| |
| @Override |
| public Runnable remove() { |
| Call result = underlyingQueue.remove(); |
| updateMetrics(result); |
| return result; |
| } |
| |
| @Override |
| public Runnable take() throws InterruptedException { |
| Call result = underlyingQueue.take(); |
| updateMetrics(result); |
| return result; |
| } |
| |
| @Override |
| public int drainTo(Collection<? super Runnable> destination) { |
| return drainTo(destination, Integer.MAX_VALUE); |
| } |
| |
| @Override |
| public int drainTo(Collection<? super Runnable> destination, |
| int maxElements) { |
| if (destination == this) { |
| throw new IllegalArgumentException( |
| "A BlockingQueue cannot drain to itself."); |
| } |
| List<Call> drained = new ArrayList<Call>(); |
| underlyingQueue.drainTo(drained, maxElements); |
| for (Call r : drained) { |
| updateMetrics(r); |
| } |
| destination.addAll(drained); |
| int sz = drained.size(); |
| LOG.info("Elements drained: " + sz); |
| return sz; |
| } |
| |
| |
| @Override |
| public boolean offer(Runnable element) { |
| return underlyingQueue.offer(new Call(element)); |
| } |
| |
| @Override |
| public boolean offer(Runnable element, long timeout, TimeUnit unit) |
| throws InterruptedException { |
| return underlyingQueue.offer(new Call(element), timeout, unit); |
| } |
| @Override |
| public void put(Runnable element) throws InterruptedException { |
| underlyingQueue.put(new Call(element)); |
| } |
| |
| @Override |
| public boolean add(Runnable element) { |
| return underlyingQueue.add(new Call(element)); |
| } |
| |
| @Override |
| public boolean addAll(Collection<? extends Runnable> elements) { |
| int added = 0; |
| for (Runnable r : elements) { |
| added += underlyingQueue.add(new Call(r)) ? 1 : 0; |
| } |
| return added != 0; |
| } |
| |
| @Override |
| public Runnable element() { |
| return underlyingQueue.element(); |
| } |
| |
| @Override |
| public Runnable peek() { |
| return underlyingQueue.peek(); |
| } |
| |
| @Override |
| public void clear() { |
| underlyingQueue.clear(); |
| } |
| |
| @Override |
| public boolean containsAll(Collection<?> elements) { |
| return underlyingQueue.containsAll(elements); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return underlyingQueue.isEmpty(); |
| } |
| |
| @Override |
| public Iterator<Runnable> iterator() { |
| return new Iterator<Runnable>() { |
| final Iterator<Call> underlyingIterator = underlyingQueue.iterator(); |
| @Override |
| public Runnable next() { |
| return underlyingIterator.next(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return underlyingIterator.hasNext(); |
| } |
| |
| @Override |
| public void remove() { |
| underlyingIterator.remove(); |
| } |
| }; |
| } |
| |
| @Override |
| public boolean removeAll(Collection<?> elements) { |
| return underlyingQueue.removeAll(elements); |
| } |
| |
| @Override |
| public boolean retainAll(Collection<?> elements) { |
| return underlyingQueue.retainAll(elements); |
| } |
| |
| @Override |
| public int size() { |
| return underlyingQueue.size(); |
| } |
| |
| @Override |
| public Object[] toArray() { |
| return underlyingQueue.toArray(); |
| } |
| |
| @Override |
| public <T> T[] toArray(T[] array) { |
| return underlyingQueue.toArray(array); |
| } |
| |
| @Override |
| public boolean contains(Object element) { |
| return underlyingQueue.contains(element); |
| } |
| |
| @Override |
| public int remainingCapacity() { |
| return underlyingQueue.remainingCapacity(); |
| } |
| |
| @Override |
| public boolean remove(Object element) { |
| return underlyingQueue.remove(element); |
| } |
| } |