Class ProtobufEncoder
java.lang.Object
org.jboss.netty.handler.codec.oneone.OneToOneEncoder
org.jboss.netty.handler.codec.protobuf.ProtobufEncoder
- All Implemented Interfaces:
ChannelDownstreamHandler
,ChannelHandler
Encodes the requested Google
Protocol Buffers
Message
and MessageLite
into a
ChannelBuffer
. A typical setup for TCP/IP would be:
and then you can use aChannelPipeline
pipeline = ...; // Decoders pipeline.addLast("frameDecoder", newLengthFieldBasedFrameDecoder
(1048576, 0, 4, 0, 4)); pipeline.addLast("protobufDecoder", newProtobufDecoder
(MyMessage.getDefaultInstance())); // Encoder pipeline.addLast("frameEncoder", newLengthFieldPrepender
(4)); pipeline.addLast("protobufEncoder", newProtobufEncoder
());
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); }
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Nested Class Summary
Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler
ChannelHandler.Sharable
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected Object
encode
(ChannelHandlerContext ctx, Channel channel, Object msg) Transforms the specified message into another message and return the transformed message.Methods inherited from class org.jboss.netty.handler.codec.oneone.OneToOneEncoder
doEncode, handleDownstream
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Constructor Details
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ProtobufEncoder
public ProtobufEncoder()
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Method Details
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encode
Description copied from class:OneToOneEncoder
Transforms the specified message into another message and return the transformed message. Note that you can not returnnull
, unlike you can inOneToOneDecoder.decode(ChannelHandlerContext, Channel, Object)
; you must return something, at leastChannelBuffers.EMPTY_BUFFER
.- Specified by:
encode
in classOneToOneEncoder
- Throws:
Exception
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