| /* |
| * 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.openejb.util; |
| |
| import java.lang.reflect.Method; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.FutureTask; |
| |
| /** |
| * Utility class used to invoke methods asynchronously, using a given {@link Executor}. |
| */ |
| public class AsynchronousRunner { |
| |
| private final Executor executor; |
| |
| public AsynchronousRunner(Executor executor) { |
| this.executor = executor; |
| } |
| |
| /** |
| * Performs the given method invocation asynchronously |
| * |
| * @param object The object which will have the method invoked |
| * @param method The method to be invoked |
| * @param arguments The invocation arguments |
| * @return A {@link Future} containing the method return value |
| */ |
| public Future<Object> runAsync(Object object, Method method, Object... arguments) { |
| Callable<Object> callable = new MethodInvoker(object, method, arguments); |
| FutureTask<Object> futureTask = new FutureTask<Object>(callable); |
| executor.execute(futureTask); |
| return futureTask; |
| } |
| |
| /** |
| * A {@link Callable} implementation which just delegates the execution using |
| * {@link Method#invoke(Object, Object[])} |
| * |
| */ |
| private class MethodInvoker implements Callable<Object> { |
| private Object object; |
| private Method method; |
| private Object[] arguments; |
| |
| public MethodInvoker(Object object, Method method, Object[] arguments) { |
| this.object = object; |
| this.method = method; |
| this.arguments = arguments; |
| } |
| |
| public Object call() throws Exception { |
| return method.invoke(object, arguments); |
| } |
| } |
| } |