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.ignite.messaging;
  
  import java.util.UUID;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.apache.camel.Processor;
  import org.apache.camel.component.ignite.IgniteConstants;
  import org.apache.camel.support.DefaultConsumer;
  import org.apache.ignite.IgniteMessaging;
  import org.apache.ignite.lang.IgniteBiPredicate;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Ignite Messaging consumer.
   */
  public class IgniteMessagingConsumer extends DefaultConsumer {
  
      private static final Logger LOG = LoggerFactory.getLogger(IgniteMessagingConsumer.class);
  
      private IgniteMessagingEndpoint endpoint;
      private IgniteMessaging messaging;
  
      private IgniteBiPredicate<UUID, Object> predicate = new IgniteBiPredicate<UUID, Object>() {
          private static final long serialVersionUID = -971933058406324501L;
  
          @Override
          public boolean apply(UUID uuid, Object payload) {
              Exchange exchange = createExchange(true);
              try {
                  Message in = exchange.getIn();
                  in.setBody(payload);
                  in.setHeader(IgniteConstants.IGNITE_MESSAGING_TOPIC, endpoint.getTopic());
                  in.setHeader(IgniteConstants.IGNITE_MESSAGING_UUID, uuid);
                  if (LOG.isTraceEnabled()) {
                      LOG.trace("Processing Ignite message for subscription {} with payload {}.", uuid, payload);
                  }
                  getProcessor().process(exchange);
              } catch (Exception e) {
                  LOG.error(String.format("Exception while processing Ignite Message from topic %s", endpoint.getTopic()), e);
              }
              return true;
          }
      };
  
      public IgniteMessagingConsumer(IgniteMessagingEndpoint endpoint, Processor processor, IgniteMessaging messaging) {
          super(endpoint, processor);
          this.endpoint = endpoint;
          this.messaging = messaging;
      }
  
      @Override
      protected void doStart() throws Exception {
          super.doStart();
  
          messaging.localListen(endpoint.getTopic(), predicate);
  
          LOG.info("Started Ignite Messaging consumer for topic {}.", endpoint.getTopic());
      }
  
      @Override
      protected void doStop() throws Exception {
          super.doStop();
  
          messaging.stopLocalListen(endpoint.getTopic(), predicate);
  
          LOG.info("Stopped Ignite Messaging consumer for topic {}.", endpoint.getTopic());
      }
  
  }
  