content: /*
   * 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.Category;
  import org.apache.camel.Component;
  import org.apache.camel.Consumer;
  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;
  
  /**
   * Send and receive messages to/from Guava EventBus.
   */
  @UriEndpoint(firstVersion = "2.10.0", scheme = "guava-eventbus", title = "Guava EventBus",
               remote = false, syntax = "guava-eventbus:eventBusRef", category = { Category.MESSAGING })
  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 boolean isRemote() {
          return false;
      }
  
      @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 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 doInit() throws Exception {
          super.doInit();
  
          if (eventBusRef != null && eventBus == null) {
              eventBus = CamelContextHelper.mandatoryLookup(getCamelContext(), eventBusRef, EventBus.class);
          }
      }
  }
  