| /* |
| * 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.openjpa.slice; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.PriorityBlockingQueue; |
| import java.util.concurrent.SynchronousQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.openjpa.lib.conf.Configuration; |
| import org.apache.openjpa.lib.conf.Configurations; |
| import org.apache.openjpa.lib.conf.PluginValue; |
| import org.apache.openjpa.lib.util.Localizer; |
| import org.apache.openjpa.lib.util.Options; |
| import org.apache.openjpa.util.UserException; |
| |
| /** |
| * Value type used to represent a {@link ExecutorService}. |
| * This value controls the thread pool parameters. The thread pool is used |
| * to execute the queries. |
| * |
| * @author Pinaki Poddar |
| * @nojavadoc |
| */ |
| |
| public class ExecutorServiceValue extends PluginValue { |
| private static List<String> known = |
| Arrays.asList(new String[] { "cached", "fixed" }); |
| |
| private static Localizer _loc = |
| Localizer.forPackage(ExecutorServiceValue.class); |
| |
| public ExecutorServiceValue() { |
| super("ThreadingPolicy", true); |
| setDefault("cached"); |
| } |
| |
| public void setProperties(String props) { |
| super.setProperties(props); |
| } |
| |
| /** |
| * Configures a cached or fixed thread pool. |
| */ |
| @Override |
| public Object instantiate(Class type, Configuration conf, boolean fatal) { |
| Object obj = null; |
| int defaultSize = 10; |
| String cls = getClassName(); |
| if (!known.contains(cls)) |
| cls = "cached"; |
| |
| Options opts = Configurations.parseProperties(getProperties()); |
| |
| ThreadFactory factory = null; |
| if (opts.containsKey("ThreadFactory")) { |
| String fName = opts.getProperty("ThreadFactory"); |
| try { |
| factory = (ThreadFactory) Class.forName(fName).newInstance(); |
| Configurations.configureInstance(factory, conf, opts, |
| getProperty()); |
| } catch (Throwable t) { |
| throw new UserException(_loc.get("bad-thread-factory", fName), t); |
| } finally { |
| opts.removeProperty("ThreadFactory"); |
| } |
| } else { |
| factory = Executors.defaultThreadFactory(); |
| } |
| if ("cached".equals(cls)) { |
| obj = Executors.newCachedThreadPool(factory); |
| } else if ("fixed".equals(cls)) { |
| long keepAliveTime = 60L; |
| if (opts.containsKey("KeepAliveTime")) { |
| keepAliveTime = opts.getLongProperty("KeepAliveTime"); |
| opts.removeLongProperty("KeepAliveTime"); |
| } |
| obj = new ThreadPoolExecutor(defaultSize, defaultSize, |
| keepAliveTime, TimeUnit.SECONDS, |
| new SynchronousQueue<Runnable>(), factory); |
| |
| Configurations.configureInstance(obj, conf, opts, getProperty()); |
| } |
| set(obj, true); |
| return obj; |
| } |
| } |