org.jboss.netty.handler.codec.protobuf

类 ProtobufEncoder

java.lang.Object

org.jboss.netty.handler.codec.oneone.OneToOneEncoder

org.jboss.netty.handler.codec.protobuf.ProtobufEncoder

所有已实现的接口:

ChannelDownstreamHandler, ChannelHandler

@ChannelHandler.Sharable
public class ProtobufEncoder
extends OneToOneEncoder

Encodes the requested Google Protocol Buffers Message and MessageLite into a ChannelBuffer. A typical setup for TCP/IP would be:

 ChannelPipeline pipeline = ...;

 // Decoders
 pipeline.addLast("frameDecoder",
                  new LengthFieldBasedFrameDecoder(1048576, 0, 4, 0, 4));
 pipeline.addLast("protobufDecoder",
                  new ProtobufDecoder(MyMessage.getDefaultInstance()));

 // Encoder
 pipeline.addLast("frameEncoder", new LengthFieldPrepender(4));
 pipeline.addLast("protobufEncoder", new ProtobufEncoder());
 

and then you can use a MyMessage instead of a ChannelBuffer as a message:

 void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
     MyMessage req = (MyMessage) e.getMessage();
     MyMessage res = MyMessage.newBuilder().setText(
                               "Did you say '" + req.getText() + "'?").build();
     ch.write(res);
 }
 

嵌套类概要

从接口继承的嵌套类/接口 org.jboss.netty.channel.ChannelHandler

ChannelHandler.Sharable

构造器概要

构造器

构造器和说明
ProtobufEncoder()

方法概要

方法

限定符和类型	方法和说明
protected java.lang.Object	encode(ChannelHandlerContext ctx, Channel channel, java.lang.Object msg) Transforms the specified message into another message and return the transformed message.

从类继承的方法 org.jboss.netty.handler.codec.oneone.OneToOneEncoder

doEncode, handleDownstream

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ProtobufEncoder

public ProtobufEncoder()

方法详细资料

encode

protected java.lang.Object encode(ChannelHandlerContext ctx,
                      Channel channel,
                      java.lang.Object msg)
                           throws java.lang.Exception

从类复制的说明: OneToOneEncoder

Transforms the specified message into another message and return the transformed message. Note that you can not return null, unlike you can in OneToOneDecoder.decode(ChannelHandlerContext, Channel, Object); you must return something, at least ChannelBuffers.EMPTY_BUFFER.

指定者:

encode 在类中 OneToOneEncoder

抛出:

java.lang.Exception