| /** |
| * 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.camel.processor; |
| |
| import org.apache.camel.AsyncCallback; |
| import org.apache.camel.AsyncProcessor; |
| import org.apache.camel.AsyncProducerCallback; |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.Endpoint; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ExchangePattern; |
| import org.apache.camel.Producer; |
| import org.apache.camel.ProducerCallback; |
| import org.apache.camel.impl.InterceptSendToEndpoint; |
| import org.apache.camel.impl.ProducerCache; |
| import org.apache.camel.impl.ServiceSupport; |
| import org.apache.camel.util.AsyncProcessorHelper; |
| import org.apache.camel.util.ObjectHelper; |
| import org.apache.camel.util.ServiceHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Processor for forwarding exchanges to an endpoint destination. |
| * |
| * @version |
| */ |
| public class SendProcessor extends ServiceSupport implements AsyncProcessor, Traceable { |
| protected final transient Logger log = LoggerFactory.getLogger(getClass()); |
| protected final CamelContext camelContext; |
| protected ProducerCache producerCache; |
| protected Endpoint destination; |
| protected ExchangePattern pattern; |
| |
| public SendProcessor(Endpoint destination) { |
| ObjectHelper.notNull(destination, "destination"); |
| this.destination = destination; |
| this.camelContext = destination.getCamelContext(); |
| ObjectHelper.notNull(this.camelContext, "camelContext"); |
| } |
| |
| public SendProcessor(Endpoint destination, ExchangePattern pattern) { |
| this(destination); |
| this.pattern = pattern; |
| } |
| |
| @Override |
| public String toString() { |
| return "sendTo(" + destination + (pattern != null ? " " + pattern : "") + ")"; |
| } |
| |
| public void setDestination(Endpoint destination) { |
| this.destination = destination; |
| } |
| |
| public String getTraceLabel() { |
| return destination.getEndpointUri(); |
| } |
| |
| public void process(final Exchange exchange) throws Exception { |
| if (!isStarted()) { |
| throw new IllegalStateException("SendProcessor has not been started: " + this); |
| } |
| |
| // we should preserve existing MEP so remember old MEP |
| // if you want to permanently to change the MEP then use .setExchangePattern in the DSL |
| final ExchangePattern existingPattern = exchange.getPattern(); |
| |
| // send the exchange to the destination using a producer |
| producerCache.doInProducer(destination, exchange, pattern, new ProducerCallback<Exchange>() { |
| public Exchange doInProducer(Producer producer, Exchange exchange, ExchangePattern pattern) throws Exception { |
| exchange = configureExchange(exchange, pattern); |
| log.debug(">>>> {} {}", destination, exchange); |
| try { |
| producer.process(exchange); |
| } finally { |
| // restore previous MEP |
| exchange.setPattern(existingPattern); |
| } |
| return exchange; |
| } |
| }); |
| } |
| |
| public boolean process(Exchange exchange, final AsyncCallback callback) { |
| if (!isStarted()) { |
| throw new IllegalStateException("SendProcessor has not been started: " + this); |
| } |
| |
| // we should preserve existing MEP so remember old MEP |
| // if you want to permanently to change the MEP then use .setExchangePattern in the DSL |
| final ExchangePattern existingPattern = exchange.getPattern(); |
| |
| // send the exchange to the destination using a producer |
| return producerCache.doInAsyncProducer(destination, exchange, pattern, callback, new AsyncProducerCallback() { |
| public boolean doInAsyncProducer(Producer producer, AsyncProcessor asyncProducer, final Exchange exchange, |
| ExchangePattern pattern, final AsyncCallback callback) { |
| final Exchange target = configureExchange(exchange, pattern); |
| log.debug(">>>> {} {}", destination, exchange); |
| return AsyncProcessorHelper.process(asyncProducer, target, new AsyncCallback() { |
| public void done(boolean doneSync) { |
| // restore previous MEP |
| target.setPattern(existingPattern); |
| // signal we are done |
| callback.done(doneSync); |
| } |
| }); |
| } |
| }); |
| } |
| |
| public Endpoint getDestination() { |
| return destination; |
| } |
| |
| public ExchangePattern getPattern() { |
| return pattern; |
| } |
| |
| protected Exchange configureExchange(Exchange exchange, ExchangePattern pattern) { |
| if (pattern != null) { |
| exchange.setPattern(pattern); |
| } |
| // set property which endpoint we send to |
| exchange.setProperty(Exchange.TO_ENDPOINT, destination.getEndpointUri()); |
| return exchange; |
| } |
| |
| protected void doStart() throws Exception { |
| if (producerCache == null) { |
| producerCache = new ProducerCache(this, camelContext); |
| // add it as a service so we can manage it |
| camelContext.addService(producerCache); |
| } |
| ServiceHelper.startService(producerCache); |
| |
| // the destination could since have been intercepted by a interceptSendToEndpoint so we got to |
| // lookup this before we can use the destination |
| Endpoint lookup = camelContext.hasEndpoint(destination.getEndpointKey()); |
| if (lookup instanceof InterceptSendToEndpoint) { |
| if (log.isDebugEnabled()) { |
| log.debug("Intercepted sending to {} -> {}", destination.getEndpointUri(), lookup.getEndpointUri()); |
| } |
| destination = lookup; |
| } |
| // warm up the producer by starting it so we can fail fast if there was a problem |
| // however must start endpoint first |
| ServiceHelper.startService(destination); |
| producerCache.startProducer(destination); |
| } |
| |
| protected void doStop() throws Exception { |
| ServiceHelper.stopService(producerCache); |
| } |
| |
| } |