@ChannelHandler.Sharable public class StringDecoder extends OneToOneDecoder
ChannelBuffer
into a String
. Please
note that this decoder must be used with a proper FrameDecoder
such as DelimiterBasedFrameDecoder
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:
and then you can use aChannelPipeline
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 a ChannelBuffer
as a message:
void messageReceived(ChannelHandlerContext
ctx,MessageEvent
e) { String msg = (String) e.getMessage(); ch.write("Did you say '" + msg + "'?\n"); }
ChannelHandler.Sharable
Constructor and Description |
---|
StringDecoder()
Creates a new instance with the current system character set.
|
StringDecoder(Charset charset)
Creates a new instance with the specified character set.
|
StringDecoder(String charsetName)
Deprecated.
Use
StringDecoder(Charset) instead. |
Modifier and Type | Method and Description |
---|---|
protected Object |
decode(ChannelHandlerContext ctx,
Channel channel,
Object msg)
Transforms the specified received message into another message and return
the transformed message.
|
handleUpstream
public StringDecoder()
public StringDecoder(Charset charset)
@Deprecated public StringDecoder(String charsetName)
StringDecoder(Charset)
instead.protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception
OneToOneDecoder
null
if the received message
is supposed to be discarded.decode
in class OneToOneDecoder
Exception
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