org.jboss.netty.handler.codec.protobuf

类 ProtobufVarint32FrameDecoder

java.lang.Object

org.jboss.netty.channel.SimpleChannelUpstreamHandler

org.jboss.netty.handler.codec.frame.FrameDecoder

org.jboss.netty.handler.codec.protobuf.ProtobufVarint32FrameDecoder

所有已实现的接口:

ChannelHandler, ChannelUpstreamHandler, LifeCycleAwareChannelHandler

public class ProtobufVarint32FrameDecoder
extends FrameDecoder

A decoder that splits the received ChannelBuffers dynamically by the value of the Google Protocol Buffers Base 128 Varints integer length field in the message. For example:

 BEFORE DECODE (302 bytes)       AFTER DECODE (300 bytes)
 +--------+---------------+      +---------------+
 | Length | Protobuf Data |----->| Protobuf Data |
 | 0xAC02 |  (300 bytes)  |      |  (300 bytes)  |
 +--------+---------------+      +---------------+
 

另请参阅:

CodedInputStream

嵌套类概要

从接口继承的嵌套类/接口 org.jboss.netty.channel.ChannelHandler

ChannelHandler.Sharable

字段概要

从类继承的字段 org.jboss.netty.handler.codec.frame.FrameDecoder

cumulation, DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS

构造器概要

构造器

构造器和说明
ProtobufVarint32FrameDecoder()

方法概要

方法

限定符和类型	方法和说明
protected java.lang.Object	decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer) Decodes the received packets so far into a frame.

从类继承的方法 org.jboss.netty.handler.codec.frame.FrameDecoder

actualReadableBytes, afterAdd, afterRemove, appendToCumulation, beforeAdd, beforeRemove, channelClosed, channelDisconnected, cleanup, decodeLast, exceptionCaught, extractFrame, getMaxCumulationBufferCapacity, getMaxCumulationBufferComponents, internalBuffer, isUnfold, messageReceived, newCumulationBuffer, replace, setMaxCumulationBufferCapacity, setMaxCumulationBufferComponents, setUnfold, unfoldAndFireMessageReceived, updateCumulation

从类继承的方法 org.jboss.netty.channel.SimpleChannelUpstreamHandler

channelBound, channelConnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, handleUpstream, writeComplete

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ProtobufVarint32FrameDecoder

public ProtobufVarint32FrameDecoder()

方法详细资料

decode

protected java.lang.Object decode(ChannelHandlerContext ctx,
                      Channel channel,
                      ChannelBuffer buffer)
                           throws java.lang.Exception

从类复制的说明: FrameDecoder

Decodes the received packets so far into a frame. If an sub-class wants to extract a frame out of the buffer it should use the FrameDecoder.extractFrame(ChannelBuffer, int, int) method, to make optimizations easier later.

指定者:

decode 在类中 FrameDecoder

参数:

ctx - the context of this handler

channel - the current channel

buffer - the cumulative buffer of received packets so far. Note that the buffer might be empty, which means you should not make an assumption that the buffer contains at least one byte in your decoder implementation.

返回:

the decoded frame if a full frame was received and decoded. null if there's not enough data in the buffer to decode a frame.

抛出:

java.lang.Exception