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.example.netty;
  
  import java.util.Random;
  
  import org.apache.camel.BindToRegistry;
  import org.apache.camel.Configuration;
  import org.apache.camel.ExchangeTimedOutException;
  import org.apache.camel.LoggingLevel;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.netty.DefaultChannelHandlerFactory;
  import org.apache.camel.main.Main;
  
  /**
   * Netty client which calls the server every half-second with a random word.
   */
  public final class MyClient {
  
      private MyClient() {
      }
  
      public static void main(String[] args) throws Exception {
          Main main = new Main(MyClient.class);
  
          main.run(args);
      }
  
      @Configuration
      public static class MyClientConfiguration {
  
          @BindToRegistry("myEncoder")
          public DefaultChannelHandlerFactory myCodecEncoderFactory() {
              return new MyCodecEncoderFactory();
          }
  
          @BindToRegistry("myDecoder")
          public DefaultChannelHandlerFactory myCodecDecoderFactory() {
              return new MyCodecDecoderFactory();
          }
  
          @BindToRegistry("myManager")
          public MyCorrelationManager myCorrelationManager() {
              return createCorrelationManager();
          }
      }
  
      static MyCorrelationManager createCorrelationManager() {
          // setup correlation manager and its timeout (when a request has not received a response within the given time millis)
          MyCorrelationManager manager = new MyCorrelationManager();
          // set timeout for each request message that did not receive a reply message
          manager.setTimeout(5000);
          // set the logging level when a timeout was hit, ny default its DEBUG
          manager.setTimeoutLoggingLevel(LoggingLevel.INFO);
          return manager;
      }
  
      public static class MyRouteBuilder extends RouteBuilder {
  
          private static final String[] WORDS = new String[]{"foo", "bar", "baz", "beer", "wine", "cheese"};
          private int counter;
          private final Random random = new Random();
  
          public int increment() {
              return ++counter;
          }
  
          public String word() {
              return WORDS[random.nextInt(WORDS.length)];
          }
  
          @Override
          public void configure() throws Exception {
              // lets build a special custom error message for timeout
              onException(ExchangeTimedOutException.class)
                  // here we tell Camel to continue routing
                  .continued(true)
                  // after it has built this special timeout error message body
                  .setBody(simple("#${header.corId}:${header.word}-Time out error!!!"));
  
              from("timer:trigger").id("client")
                  // set correlation id as unique incrementing number
                  .setHeader("corId", method(this, "increment"))
                  // set random word to use in request
                  .setHeader("word", method(this, "word"))
                  // build request message as a string body
                  .setBody(simple("#${header.corId}:${header.word}"))
                  // log request before
                  .log("Request:  ${id}:${body}")
                  // call netty server using a single shared connection and using custom correlation manager
                  // to ensure we can correctly map the request and response pairs
                  .to("netty:tcp://localhost:4444?sync=true&encoders=#bean:myEncoder&decoders=#bean:myDecoder"
                      + "&producerPoolEnabled=false&correlationManager=#bean:myManager")
                  // log response after
                  .log("Response: ${id}:${body}");
          }
      }
  }
  