Class ProtobufEncoderNano
java.lang.Object
io.netty.channel.ChannelHandlerAdapter
io.netty.channel.ChannelOutboundHandlerAdapter
io.netty.handler.codec.MessageToMessageEncoder<com.google.protobuf.nano.MessageNano>
io.netty.handler.codec.protobuf.ProtobufEncoderNano
- All Implemented Interfaces:
ChannelHandler, ChannelOutboundHandler
@Sharable
public class ProtobufEncoderNano
extends MessageToMessageEncoder<com.google.protobuf.nano.MessageNano>
Encodes the requested Google
Protocol Buffers
MessageNano into a
ByteBuf. A typical setup for TCP/IP would be:
and then you can use aChannelPipelinepipeline = ...; // Decoders pipeline.addLast("frameDecoder", newLengthFieldBasedFrameDecoder(1048576, 0, 4, 0, 4)); pipeline.addLast("protobufDecoder", newProtobufDecoderNano(MyMessage.getDefaultInstance())); // Encoder pipeline.addLast("frameEncoder", newLengthFieldPrepender(4)); pipeline.addLast("protobufEncoder", newProtobufEncoderNano());
MyMessage instead of a ByteBuf
as a message:
void channelRead(ChannelHandlerContext ctx, Object msg) {
MyMessage req = (MyMessage) msg;
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 ChannelHandler
ChannelHandler.Sharable -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected voidencode(ChannelHandlerContext ctx, com.google.protobuf.nano.MessageNano msg, List<Object> out) Encode from one message to an other.Methods inherited from class MessageToMessageEncoder
acceptOutboundMessage, writeMethods inherited from class ChannelOutboundHandlerAdapter
bind, close, connect, deregister, disconnect, flush, readMethods inherited from class ChannelHandlerAdapter
ensureNotSharable, exceptionCaught, handlerAdded, handlerRemoved, isSharableMethods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface ChannelHandler
exceptionCaught, handlerAdded, handlerRemoved
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Constructor Details
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ProtobufEncoderNano
public ProtobufEncoderNano()
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Method Details
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encode
protected void encode(ChannelHandlerContext ctx, com.google.protobuf.nano.MessageNano msg, List<Object> out) throws Exception Description copied from class:MessageToMessageEncoderEncode from one message to an other. This method will be called for each written message that can be handled by this encoder.- Specified by:
encodein classMessageToMessageEncoder<com.google.protobuf.nano.MessageNano>- Parameters:
ctx- theChannelHandlerContextwhich thisMessageToMessageEncoderbelongs tomsg- the message to encode to an other oneout- theListinto which the encoded msg should be added needs to do some kind of aggregation- Throws:
Exception- is thrown if an error occurs
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