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.events;
  
  import java.util.Arrays;
  import java.util.List;
  
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.apache.camel.Processor;
  import org.apache.camel.support.DefaultConsumer;
  import org.apache.ignite.IgniteEvents;
  import org.apache.ignite.events.Event;
  import org.apache.ignite.lang.IgnitePredicate;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Ignite Events consumer.
   */
  public class IgniteEventsConsumer extends DefaultConsumer {
  
      private static final Logger LOG = LoggerFactory.getLogger(IgniteEventsConsumer.class);
  
      private IgniteEventsEndpoint endpoint;
      private IgniteEvents events;
      private int[] eventTypes = new int[0];
  
      private IgnitePredicate<Event> predicate = new IgnitePredicate<Event>() {
          private static final long serialVersionUID = 6738594728074592726L;
  
          @Override
          public boolean apply(Event event) {
              Exchange exchange = createExchange(true);
              Message in = exchange.getIn();
              in.setBody(event);
              try {
                  if (LOG.isTraceEnabled()) {
                      LOG.trace("Processing Ignite Event: {}.", event);
                  }
                  // use default consumer callback
                  AsyncCallback cb = defaultConsumerCallback(exchange, true);
                  getAsyncProcessor().process(exchange, cb);
              } catch (Exception e) {
                  LOG.error(String.format("Exception while processing Ignite Event: %s.", event), e);
              }
              return true;
          }
      };
  
      public IgniteEventsConsumer(IgniteEventsEndpoint endpoint, Processor processor, IgniteEvents events) {
          super(endpoint, processor);
          this.endpoint = endpoint;
          this.events = events;
      }
  
      @Override
      protected void doStart() throws Exception {
          super.doStart();
  
          List<Integer> ids = endpoint.getEventsAsIds();
          eventTypes = new int[ids.size()];
          int counter = 0;
          for (Integer i : ids) {
              eventTypes[counter++] = i;
          }
  
          events.localListen(predicate, eventTypes);
  
          LOG.info("Started local Ignite Events consumer for events: {}.", Arrays.asList(eventTypes));
      }
  
      @Override
      protected void doStop() throws Exception {
          super.doStop();
  
          events.stopLocalListen(predicate, eventTypes);
  
          LOG.info("Stopped local Ignite Events consumer for events: {}.", Arrays.asList(eventTypes));
      }
  
  }
  