Chapter 118. Netty4

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-netty4</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

netty4:tcp://localhost:99999[?options]
netty4:udp://remotehost:99999/[?options]

RouteBuilder builder = new RouteBuilder() {
  public void configure() {
    from("netty4:udp://localhost:5155?sync=true")
      .process(new Processor() {
         public void process(Exchange exchange) throws Exception {
           Poetry poetry = (Poetry) exchange.getIn().getBody();
           poetry.setPoet("Dr. Sarojini Naidu");
           exchange.getOut().setBody(poetry);
         }
       }
    }
};

RouteBuilder builder = new RouteBuilder() {
  public void configure() {
       from("netty4:tcp://localhost:5150")
           .to("mock:result");
  }
};

ChannelHandlerFactory lengthDecoder = ChannelHandlerFactories.newLengthFieldBasedFrameDecoder(1048576, 0, 4, 0, 4);
 
StringDecoder stringDecoder = new StringDecoder();
registry.bind("length-decoder", lengthDecoder);
registry.bind("string-decoder", stringDecoder);
 
LengthFieldPrepender lengthEncoder = new LengthFieldPrepender(4);
StringEncoder stringEncoder = new StringEncoder();
registry.bind("length-encoder", lengthEncoder);
registry.bind("string-encoder", stringEncoder);
 
List<ChannelHandler> decoders = new ArrayList<ChannelHandler>();
decoders.add(lengthDecoder);
decoders.add(stringDecoder);
 
List<ChannelHandler> encoders = new ArrayList<ChannelHandler>();
encoders.add(lengthEncoder);
encoders.add(stringEncoder);
 
registry.bind("encoders", encoders);
registry.bind("decoders", decoders);

   
<util:list id="decoders" list-class="java.util.LinkedList">
        <bean class="org.apache.camel.component.netty4.ChannelHandlerFactories" factory-method="newLengthFieldBasedFrameDecoder">
            <constructor-arg value="1048576"/>
            <constructor-arg value="0"/>
            <constructor-arg value="4"/>
            <constructor-arg value="0"/>
            <constructor-arg value="4"/>
        </bean>
        <bean class="io.netty.handler.codec.string.StringDecoder"/>
    </util:list>

    <util:list id="encoders" list-class="java.util.LinkedList">
        <bean class="io.netty.handler.codec.LengthFieldPrepender">
            <constructor-arg value="4"/>
        </bean>
        <bean class="io.netty.handler.codec.string.StringEncoder"/>
    </util:list>

    <bean id="length-encoder" class="io.netty.handler.codec.LengthFieldPrepender">
        <constructor-arg value="4"/>
    </bean>
    <bean id="string-encoder" class="io.netty.handler.codec.string.StringEncoder"/>

    <bean id="length-decoder" class="org.apache.camel.component.netty4.ChannelHandlerFactories" factory-method="newLengthFieldBasedFrameDecoder">
        <constructor-arg value="1048576"/>
        <constructor-arg value="0"/>
        <constructor-arg value="4"/>
        <constructor-arg value="0"/>
        <constructor-arg value="4"/>
    </bean>
    <bean id="string-decoder" class="io.netty.handler.codec.string.StringDecoder"/>

 from("direct:multiple-codec").to("netty4:tcp://localhost:{{port}}?encoders=#encoders&sync=false");
                
 from("netty4:tcp://localhost:{{port}}?decoders=#length-decoder,#string-decoder&sync=false").to("mock:multiple-codec");

   <camelContext id="multiple-netty-codecs-context" xmlns="http://camel.apache.org/schema/spring">
        <route>
            <from uri="direct:multiple-codec"/>
            <to uri="netty4:tcp://localhost:5150?encoders=#encoders&amp;sync=false"/>
        </route>
        <route>
            <from uri="netty4:tcp://localhost:5150?decoders=#length-decoder,#string-decoder&amp;sync=false"/>
            <to uri="mock:multiple-codec"/>
        </route>
    </camelContext>

        from("netty4:tcp://localhost:8080").process(new Processor() {
            public void process(Exchange exchange) throws Exception {
                String body = exchange.getIn().getBody(String.class);
                exchange.getOut().setBody("Bye " + body);
                // some condition which determines if we should close
                if (close) {
                    exchange.getOut().setHeader(NettyConstants.NETTY_CLOSE_CHANNEL_WHEN_COMPLETE, true);
                }
            }
        });

Registry registry = camelContext.getRegistry();
ServerInitializerFactory factory = new TestServerInitializerFactory();
registry.bind("spf", factory);
context.addRoutes(new RouteBuilder() {
  public void configure() {
      String netty_ssl_endpoint =
         "netty4:tcp://localhost:5150?serverInitializerFactory=#spf"
      String return_string =
         "When You Go Home, Tell Them Of Us And Say,"
         + "For Your Tomorrow, We Gave Our Today.";
 
      from(netty_ssl_endpoint)
       .process(new Processor() {
          public void process(Exchange exchange) throws Exception {
            exchange.getOut().setBody(return_string);
          }
       }
  }
});

  <!-- use the worker pool builder to create to help create the shared thread pool -->
  <bean id="poolBuilder" class="org.apache.camel.component.netty.NettyWorkerPoolBuilder">
    <property name="workerCount" value="2"/>
  </bean>

  <!-- the shared worker thread pool -->
  <bean id="sharedPool" class="org.jboss.netty.channel.socket.nio.WorkerPool"
        factory-bean="poolBuilder" factory-method="build" destroy-method="shutdown">
  </bean>

    <route>
      <from uri="netty4:tcp://localhost:5021?textline=true&amp;sync=true&amp;workerPool=#sharedPool&amp;usingExecutorService=false"/>
      <to uri="log:result"/>
      ...
    </route>

    <route>
      <from uri="netty4:tcp://localhost:5022?textline=true&amp;sync=true&amp;workerPool=#sharedPool&amp;usingExecutorService=false"/>
      <to uri="log:result"/>
      ...
    </route>