| /** |
| * 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.component.vertx; |
| |
| import io.vertx.core.Handler; |
| import io.vertx.core.eventbus.Message; |
| import io.vertx.core.eventbus.MessageConsumer; |
| import org.apache.camel.AsyncCallback; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ExchangePattern; |
| import org.apache.camel.Processor; |
| import org.apache.camel.impl.DefaultConsumer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.apache.camel.component.vertx.VertxHelper.getVertxBody; |
| |
| public class VertxConsumer extends DefaultConsumer { |
| private static final Logger LOG = LoggerFactory.getLogger(VertxConsumer.class); |
| private final VertxEndpoint endpoint; |
| private transient MessageConsumer messageConsumer; |
| |
| private Handler<Message<Object>> handler = new Handler<Message<Object>>() { |
| public void handle(Message event) { |
| onEventBusEvent(event); |
| } |
| }; |
| |
| public VertxConsumer(VertxEndpoint endpoint, Processor processor) { |
| super(endpoint, processor); |
| this.endpoint = endpoint; |
| } |
| |
| protected void onEventBusEvent(final Message event) { |
| LOG.debug("onEvent {}", event); |
| |
| final boolean reply = event.replyAddress() != null; |
| final Exchange exchange = endpoint.createExchange(reply ? ExchangePattern.InOut : ExchangePattern.InOnly); |
| exchange.getIn().setBody(event.body()); |
| |
| try { |
| getAsyncProcessor().process(exchange, new AsyncCallback() { |
| @Override |
| public void done(boolean doneSync) { |
| if (reply) { |
| Object body = getVertxBody(exchange); |
| if (body != null) { |
| LOG.debug("Sending reply to: {} with body: {}", event.replyAddress(), body); |
| event.reply(body); |
| } |
| } |
| } |
| }); |
| } catch (Exception e) { |
| getExceptionHandler().handleException("Error processing Vertx event: " + event, exchange, e); |
| } |
| } |
| |
| protected void doStart() throws Exception { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Registering EventBus handler on address {}", endpoint.getAddress()); |
| } |
| |
| if (endpoint.getEventBus() != null) { |
| messageConsumer = endpoint.getEventBus().consumer(endpoint.getAddress(), handler); |
| } |
| super.doStart(); |
| } |
| |
| protected void doStop() throws Exception { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Unregistering EventBus handler on address {}", endpoint.getAddress()); |
| } |
| |
| try { |
| if (messageConsumer != null && messageConsumer.isRegistered()) { |
| messageConsumer.unregister(); |
| messageConsumer = null; |
| } |
| } catch (IllegalStateException e) { |
| LOG.warn("EventBus already stopped on address {}", endpoint.getAddress()); |
| // ignore if already stopped as vertx throws this exception if its already stopped etc. |
| // unfortunately it does not provide an nicer api to know its state |
| } |
| super.doStop(); |
| } |
| } |