@ChannelPipelineCoverage(value="all") public class ProtobufDecoder extends OneToOneDecoder
ChannelBuffer
into a
Google Protocol Buffers
Message
. Please note that this decoder must be used with a proper
FrameDecoder
such as LengthFieldBasedFrameDecoder
if you are
using a stream-based transport such as TCP/IP. 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); }
Constructor and Description |
---|
ProtobufDecoder(com.google.protobuf.Message prototype)
Creates a new instance.
|
ProtobufDecoder(com.google.protobuf.Message prototype,
com.google.protobuf.ExtensionRegistry extensionRegistry) |
Modifier and Type | Method and Description |
---|---|
protected Object |
decode(ChannelHandlerContext ctx,
Channel channel,
Object msg) |
handleUpstream
public ProtobufDecoder(com.google.protobuf.Message prototype)
public ProtobufDecoder(com.google.protobuf.Message prototype, com.google.protobuf.ExtensionRegistry extensionRegistry)
protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception
decode
in class OneToOneDecoder
Exception
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