| /* |
| * 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.guava.eventbus; |
| |
| import com.google.common.eventbus.EventBus; |
| import org.apache.camel.Component; |
| import org.apache.camel.Consumer; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.MultipleConsumersSupport; |
| import org.apache.camel.Processor; |
| import org.apache.camel.Producer; |
| import org.apache.camel.spi.UriEndpoint; |
| import org.apache.camel.spi.UriParam; |
| import org.apache.camel.spi.UriPath; |
| import org.apache.camel.support.CamelContextHelper; |
| import org.apache.camel.support.DefaultEndpoint; |
| |
| /** |
| * The guava-eventbus component provides integration bridge between Camel and Google Guava EventBus. |
| */ |
| @UriEndpoint(firstVersion = "2.10.0", scheme = "guava-eventbus", title = "Guava EventBus", syntax = "guava-eventbus:eventBusRef", label = "eventbus") |
| public class GuavaEventBusEndpoint extends DefaultEndpoint implements MultipleConsumersSupport { |
| |
| private EventBus eventBus; |
| |
| @UriPath |
| private String eventBusRef; |
| @UriParam |
| private Class<?> eventClass; |
| @UriParam |
| private Class<?> listenerInterface; |
| |
| public GuavaEventBusEndpoint(String endpointUri, Component component, EventBus eventBus, Class<?> listenerInterface) { |
| super(endpointUri, component); |
| this.eventBus = eventBus; |
| this.listenerInterface = listenerInterface; |
| } |
| |
| @Override |
| public Producer createProducer() throws Exception { |
| return new GuavaEventBusProducer(this, eventBus); |
| } |
| |
| @Override |
| public Consumer createConsumer(Processor processor) throws Exception { |
| GuavaEventBusConsumer answer = new GuavaEventBusConsumer(this, processor, eventBus, eventClass, listenerInterface); |
| configureConsumer(answer); |
| return answer; |
| } |
| |
| @Override |
| public boolean isMultipleConsumersSupported() { |
| return true; |
| } |
| |
| public Exchange createExchange(Object event) { |
| Exchange exchange = createExchange(); |
| exchange.getIn().setBody(event); |
| return exchange; |
| } |
| |
| public String getEventBusRef() { |
| return eventBusRef; |
| } |
| |
| /** |
| * To lookup the Guava EventBus from the registry with the given name |
| */ |
| public void setEventBusRef(String eventBusRef) { |
| this.eventBusRef = eventBusRef; |
| } |
| |
| public EventBus getEventBus() { |
| return eventBus; |
| } |
| |
| /** |
| * To use the given Guava EventBus instance |
| */ |
| public void setEventBus(EventBus eventBus) { |
| this.eventBus = eventBus; |
| } |
| |
| public Class<?> getEventClass() { |
| return eventClass; |
| } |
| |
| /** |
| * If used on the consumer side of the route, will filter events received from the EventBus to the instances of |
| * the class and superclasses of eventClass. Null value of this option is equal to setting it to the java.lang.Object |
| * i.e. the consumer will capture all messages incoming to the event bus. This option cannot be used together |
| * with listenerInterface option. |
| */ |
| public void setEventClass(Class<?> eventClass) { |
| this.eventClass = eventClass; |
| } |
| |
| public Class<?> getListenerInterface() { |
| return listenerInterface; |
| } |
| |
| /** |
| * The interface with method(s) marked with the @Subscribe annotation. |
| * Dynamic proxy will be created over the interface so it could be registered as the EventBus listener. |
| * Particularly useful when creating multi-event listeners and for handling DeadEvent properly. This option cannot be used together with eventClass option. |
| */ |
| public void setListenerInterface(Class<?> listenerInterface) { |
| this.listenerInterface = listenerInterface; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| super.doStart(); |
| |
| if (eventBusRef != null && eventBus == null) { |
| eventBus = CamelContextHelper.mandatoryLookup(getCamelContext(), eventBusRef, EventBus.class); |
| } |
| } |
| } |