Package org.apache.mina.filter.codec

Interface ProtocolDecoder

All Known Implementing Classes:

CumulativeProtocolDecoder, DecodingStateProtocolDecoder, DemuxingProtocolDecoder, ObjectSerializationDecoder, PrefixedStringDecoder, ProtocolDecoderAdapter, SynchronizedProtocolDecoder, TextLineDecoder

public interface ProtocolDecoder

Decodes binary or protocol-specific data into higher-level message objects. MINA invokes decode(IoSession, IoBuffer, ProtocolDecoderOutput) method with read data, and then the decoder implementation puts decoded messages into ProtocolDecoderOutput by calling ProtocolDecoderOutput.write(Object).

Please refer to TextLineDecoder example.

Author:

Apache MINA Project

See Also:

ProtocolDecoderException

Method Summary

Modifier and Type	Method	Description
void	decode(IoSession session, IoBuffer in, ProtocolDecoderOutput out)	Decodes binary or protocol-specific content into higher-level message objects.
void	dispose(IoSession session)	Releases all resources related with this decoder.
void	finishDecode(IoSession session, ProtocolDecoderOutput out)	Invoked when the specified session is closed.

Method Detail

decode

void decode(IoSession session,
            IoBuffer in,
            ProtocolDecoderOutput out)
     throws Exception

Decodes binary or protocol-specific content into higher-level message objects. MINA invokes decode(IoSession, IoBuffer, ProtocolDecoderOutput) method with read data, and then the decoder implementation puts decoded messages into ProtocolDecoderOutput.

Parameters:

session - The current Session

in - the buffer to decode

out - The ProtocolDecoderOutput that will receive the decoded message

Throws:

Exception - if the read data violated protocol specification

finishDecode

void finishDecode(IoSession session,
                  ProtocolDecoderOutput out)
           throws Exception

Invoked when the specified session is closed. This method is useful when you deal with the protocol which doesn't specify the length of a message such as HTTP response without content-length header. Implement this method to process the remaining data that decode(IoSession, IoBuffer, ProtocolDecoderOutput) method didn't process completely.

Parameters:

session - The current Session

out - The ProtocolDecoderOutput that contains the decoded message

Throws:

Exception - if the read data violated protocol specification

dispose

void dispose(IoSession session)
      throws Exception

Releases all resources related with this decoder.

Parameters:

session - The current Session

Throws:

Exception - if failed to dispose all resources