001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.processor; 018 019 import org.apache.camel.AsyncCallback; 020 import org.apache.camel.AsyncProcessor; 021 import org.apache.camel.Exchange; 022 import org.apache.camel.impl.ServiceSupport; 023 import org.apache.camel.util.AsyncProcessorHelper; 024 import org.apache.camel.util.ServiceHelper; 025 026 /** 027 * A Delegate pattern which delegates processing to a nested AsyncProcessor which can 028 * be useful for implementation inheritance when writing an {@link org.apache.camel.spi.Policy} 029 */ 030 public class DelegateAsyncProcessor extends ServiceSupport implements AsyncProcessor { 031 protected AsyncProcessor processor; 032 033 public DelegateAsyncProcessor() { 034 } 035 public DelegateAsyncProcessor(AsyncProcessor processor) { 036 this.processor = processor; 037 } 038 039 @Override 040 public String toString() { 041 return "DelegateAsync(" + processor + ")"; 042 } 043 044 public AsyncProcessor getProcessor() { 045 return processor; 046 } 047 048 public void setProcessor(AsyncProcessor processor) { 049 this.processor = processor; 050 } 051 052 protected void doStart() throws Exception { 053 ServiceHelper.startServices(processor); 054 } 055 056 protected void doStop() throws Exception { 057 ServiceHelper.stopServices(processor); 058 } 059 060 public boolean process(final Exchange exchange, final AsyncCallback callback) { 061 return processor.process(exchange, callback); 062 } 063 064 public void process(Exchange exchange) throws Exception { 065 AsyncProcessorHelper.process(this, exchange); 066 } 067 068 }