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.component.binding;
018
019 import org.apache.camel.CamelContextAware;
020 import org.apache.camel.Component;
021 import org.apache.camel.Consumer;
022 import org.apache.camel.Endpoint;
023 import org.apache.camel.Exchange;
024 import org.apache.camel.Processor;
025 import org.apache.camel.Producer;
026 import org.apache.camel.impl.DefaultEndpoint;
027 import org.apache.camel.processor.PipelineHelper;
028 import org.apache.camel.spi.Binding;
029 import org.apache.camel.spi.HasBinding;
030 import org.apache.camel.util.ServiceHelper;
031
032 /**
033 * Applies a {@link org.apache.camel.spi.Binding} to an underlying {@link Endpoint} so that the binding processes messages
034 * before its sent to the endpoint and processes messages received by the endpoint consumer before its passed
035 * to the real consumer.
036 */
037 public class BindingEndpoint extends DefaultEndpoint implements HasBinding {
038 private final Binding binding;
039 private final Endpoint delegate;
040
041 public BindingEndpoint(String uri, Component component, Binding binding, Endpoint delegate) {
042 super(uri, component);
043 this.binding = binding;
044 this.delegate = delegate;
045 }
046
047 @Override
048 public Producer createProducer() throws Exception {
049 return new BindingProducer(this);
050 }
051
052 @Override
053 public Consumer createConsumer(Processor processor) throws Exception {
054 Processor bindingProcessor = new BindingConsumerProcessor(this, processor);
055 return delegate.createConsumer(bindingProcessor);
056 }
057
058 @Override
059 public boolean isSingleton() {
060 return true;
061 }
062
063 @Override
064 public Binding getBinding() {
065 return binding;
066 }
067
068 public Endpoint getDelegate() {
069 return delegate;
070 }
071
072 /**
073 * Applies the {@link Binding} processor to the given exchange before passing it on to the delegateProcessor (either a producer or consumer)
074 */
075 public void pipelineBindingProcessor(Processor bindingProcessor, Exchange exchange, Processor delegateProcessor) throws Exception {
076 bindingProcessor.process(exchange);
077
078 Exchange delegateExchange = PipelineHelper.createNextExchange(exchange);
079 delegateProcessor.process(delegateExchange);
080 }
081
082 @Override
083 protected void doStart() throws Exception {
084 // inject CamelContext
085 if (binding instanceof CamelContextAware) {
086 ((CamelContextAware) binding).setCamelContext(getCamelContext());
087 }
088 ServiceHelper.startServices(delegate, binding);
089 super.doStart();
090 }
091
092 @Override
093 protected void doStop() throws Exception {
094 ServiceHelper.stopServices(delegate, binding);
095 super.doStop();
096 }
097 }