Class StringDecoder
- java.lang.Object
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- org.jboss.netty.handler.codec.oneone.OneToOneDecoder
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- org.jboss.netty.handler.codec.string.StringDecoder
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- All Implemented Interfaces:
ChannelHandler
,ChannelUpstreamHandler
@Sharable public class StringDecoder extends OneToOneDecoder
Decodes a receivedChannelBuffer
into aString
. Please note that this decoder must be used with a properFrameDecoder
such asDelimiterBasedFrameDecoder
if you are using a stream-based transport such as TCP/IP. A typical setup for a text-based line protocol in a TCP/IP socket would be:ChannelPipeline
pipeline = ...; // Decoders pipeline.addLast("frameDecoder", newDelimiterBasedFrameDecoder
(80,Delimiters.lineDelimiter()
)); pipeline.addLast("stringDecoder", newStringDecoder
(CharsetUtil.UTF_8)); // Encoder pipeline.addLast("stringEncoder", newStringEncoder
(CharsetUtil.UTF_8));String
instead of aChannelBuffer
as a message:void messageReceived(
ChannelHandlerContext
ctx,MessageEvent
e) { String msg = (String) e.getMessage(); ch.write("Did you say '" + msg + "'?\n"); }
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Nested Class Summary
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Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler
ChannelHandler.Sharable
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Constructor Summary
Constructors Constructor Description StringDecoder()
Creates a new instance with the current system character set.StringDecoder(Charset charset)
Creates a new instance with the specified character set.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected Object
decode(ChannelHandlerContext ctx, Channel channel, Object msg)
Transforms the specified received message into another message and return the transformed message.-
Methods inherited from class org.jboss.netty.handler.codec.oneone.OneToOneDecoder
handleUpstream
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Constructor Detail
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StringDecoder
public StringDecoder()
Creates a new instance with the current system character set.
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StringDecoder
public StringDecoder(Charset charset)
Creates a new instance with the specified character set.
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Method Detail
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decode
protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception
Description copied from class:OneToOneDecoder
Transforms the specified received message into another message and return the transformed message. Returnnull
if the received message is supposed to be discarded.- Specified by:
decode
in classOneToOneDecoder
- Throws:
Exception
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