| /* |
| * 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.chukwa.datacollection.agent; |
| |
| |
| import java.util.List; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import org.apache.hadoop.chukwa.Chunk; |
| import org.apache.hadoop.chukwa.datacollection.ChunkQueue; |
| import org.apache.log4j.Logger; |
| |
| public class WaitingQueue implements ChunkQueue { |
| |
| static Logger log = Logger.getLogger(WaitingQueue.class); |
| private BlockingQueue<Chunk> queue = new LinkedBlockingQueue<Chunk>(5); |
| |
| public void add(Chunk event) { |
| try { |
| this.queue.put(event); |
| } catch (InterruptedException e) { |
| }// return upwards |
| } |
| |
| public void add(List<Chunk> events) { |
| this.queue.addAll(events); |
| |
| } |
| |
| public void collect(List<Chunk> events, int maxCount) { |
| // Workaround to block on the queue |
| try { |
| events.add(this.queue.take()); |
| } catch (InterruptedException e) { |
| } |
| this.queue.drainTo(events, maxCount - 1); |
| |
| System.out.println("collect [" + Thread.currentThread().getName() + "] [" |
| + events.size() + "]"); |
| |
| if (log.isDebugEnabled()) { |
| log.debug("WaitingQueue.inQueueCount:" + queue.size() |
| + "\tWaitingQueue.collectCount:" + events.size()); |
| } |
| } |
| |
| public int size() { |
| return queue.size(); |
| } |
| |
| } |