| /* |
| * 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.dataloader; |
| |
| import java.io.IOException; |
| import java.util.concurrent.CompletionService; |
| import java.util.concurrent.ExecutorCompletionService; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.chukwa.conf.ChukwaConfiguration; |
| import org.apache.hadoop.chukwa.util.ExceptionUtil; |
| |
| public class MetricDataLoaderPool extends DataLoaderFactory { |
| private static Log log = LogFactory.getLog(MetricDataLoaderPool.class); |
| |
| protected MetricDataLoader threads[] = null; |
| private static String DATA_LOADER_THREAD_LIMIT = "chukwa.data.loader.threads.limit"; |
| private int size = 1; |
| private CompletionService completion = null; |
| private ExecutorService executor = null; |
| |
| public MetricDataLoaderPool() { |
| } |
| |
| public void load(ChukwaConfiguration conf, FileSystem fs, FileStatus[] fileList) throws IOException { |
| |
| if(executor==null) { |
| try { |
| this.size = Integer.parseInt(conf.get(DATA_LOADER_THREAD_LIMIT)); |
| } catch(Exception e) { |
| this.size = 1; |
| } |
| executor = Executors.newFixedThreadPool(size); |
| } |
| if(completion==null) { |
| completion = new ExecutorCompletionService(executor); |
| } |
| try { |
| for(int i=0;i<fileList.length;i++) { |
| String filename = fileList[i].getPath().toUri().toString(); |
| log.info("Processing: "+filename); |
| completion.submit(new MetricDataLoader(conf, fs, filename)); |
| } |
| for(int i=0;i<fileList.length;i++) { |
| completion.take().get(); |
| } |
| } catch(Exception e) { |
| log.error(ExceptionUtil.getStackTrace(e)); |
| throw new IOException(); |
| } |
| } |
| |
| public void shutdown() throws InterruptedException { |
| executor.shutdown(); |
| executor.awaitTermination(30, TimeUnit.SECONDS); |
| executor.shutdownNow(); |
| } |
| } |