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.telemetry;
  
  import java.util.concurrent.Callable;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.CamelExchangeException;
  import org.apache.camel.Exchange;
  import org.apache.camel.support.DefaultAsyncProducer;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class MyAsyncProducer extends DefaultAsyncProducer {
  
      private static final Logger LOG = LoggerFactory.getLogger(MyAsyncProducer.class);
      private final ExecutorService executor;
      private final AtomicInteger counter = new AtomicInteger();
  
      public MyAsyncProducer(MyAsyncEndpoint endpoint) {
          super(endpoint);
          this.executor = endpoint.getCamelContext().getExecutorServiceManager().newDefaultThreadPool(this, "MyProducer");
      }
  
      @Override
      public MyAsyncEndpoint getEndpoint() {
          return (MyAsyncEndpoint) super.getEndpoint();
      }
  
      @Override
      public boolean process(final Exchange exchange, final AsyncCallback callback) {
          executor.submit(new Callable<Object>() {
              public Object call() throws Exception {
                  LOG.info("Simulating a task which takes {} millis to reply", getEndpoint().getDelay());
                  Thread.sleep(getEndpoint().getDelay());
  
                  int count = counter.incrementAndGet();
                  if (getEndpoint().getFailFirstAttempts() >= count) {
                      LOG.info("Simulating a failure at attempt {}", count);
                      exchange.setException(new CamelExchangeException("Simulated error at attempt " + count, exchange));
                  } else {
                      String reply = getEndpoint().getReply();
                      reply = getEndpoint().isAppend() ? exchange.getIn().getBody() + " " + reply : reply;
                      exchange.getMessage().setBody(reply);
                      LOG.info("Setting reply {}", reply);
                  }
  
                  LOG.info("Callback done(false)");
                  callback.done(false);
                  return null;
              }
          });
  
          // indicate from this point forward its being routed asynchronously
          LOG.info("Task submitted, now tell Camel routing engine to that this Exchange is being continued asynchronously");
          return false;
      }
  
  }
  