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 }