public class FixedLengthFrameDecoder extends ByteToMessageDecoder
ByteBuf分割成固定的字节数。
例如，如果您收到以下四个分段数据包：
+---+----+------+----+
| A | BC | DEFG | HI |
+---+----+------+----+
A FixedLengthFrameDecoder (3)会将它们解码为以下三个固定长度的数据包：
+-----+-----+-----+
| ABC | DEF | GHI |
+-----+-----+-----+
ByteToMessageDecoder.CumulatorChannelHandler.SharableCOMPOSITE_CUMULATOR, MERGE_CUMULATOR| Constructor and Description |
|---|
FixedLengthFrameDecoder(int frameLength)
创建一个新的实例。
|
| Modifier and Type | Method and Description |
|---|---|
protected java.lang.Object |
decode(ChannelHandlerContext ctx, ByteBuf in)
从 ByteBuf中创建一个框架并将其返回。
|
protected void |
decode(ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out)
解码从一个 ByteBuf到另一个。
|
actualReadableBytes, callDecode, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, handlerRemoved0, internalBuffer, isSingleDecode, setCumulator, setDiscardAfterReads, setSingleDecode, userEventTriggeredchannelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaughtensureNotSharable, handlerAdded, isSharableclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waithandlerAddedpublic FixedLengthFrameDecoder(int frameLength)
frameLength - 框架的长度
protected final void decode(ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out) throws java.lang.Exception
ByteToMessageDecoder
decode
ByteToMessageDecoder
ctx - 这ByteToMessageDecoder所属的ChannelHandlerContext
in - 从中读取数据的ByteBuf
out - 应该添加解码消息的
List
java.lang.Exception - 发生错误时抛出
protected java.lang.Object decode(ChannelHandlerContext ctx, ByteBuf in) throws java.lang.Exception
ByteBuf中创建一个框架并将其返回。
ctx - 这ByteToMessageDecoder所属的ChannelHandlerContext
in - 从中读取数据的ByteBuf
ByteBuf表示帧或null 。
java.lang.Exception
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