001// Copyright 2009 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.ioc.internal.services; 016 017import org.apache.tapestry5.ioc.Invokable; 018import org.apache.tapestry5.ioc.services.ParallelExecutor; 019 020import java.util.concurrent.ExecutionException; 021import java.util.concurrent.Future; 022import java.util.concurrent.TimeUnit; 023import java.util.concurrent.TimeoutException; 024 025/** 026 * Implementation of {@link ParallelExecutor} used when {@linkplain org.apache.tapestry5.ioc.IOCSymbols#THREAD_POOL_ENABLED 027 * the thread pool is disabled}. 028 * 029 * @since 5.1.0.3 030 */ 031public class NonParallelExecutor implements ParallelExecutor 032{ 033 public <T> Future<T> invoke(Invokable<T> invocable) 034 { 035 final T result = invocable.invoke(); 036 037 return new Future<T>() 038 { 039 public boolean cancel(boolean mayInterruptIfRunning) 040 { 041 return false; 042 } 043 044 public boolean isCancelled() 045 { 046 return false; 047 } 048 049 public boolean isDone() 050 { 051 return true; 052 } 053 054 public T get() throws InterruptedException, ExecutionException 055 { 056 return result; 057 } 058 059 public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException 060 { 061 return result; 062 } 063 }; 064 } 065 066 public <T> T invoke(Class<T> proxyType, Invokable<T> invocable) 067 { 068 return invocable.invoke(); 069 } 070}