com.firefly.codec.http2.stream

类 BufferingFlowControlStrategy

java.lang.Object

com.firefly.codec.http2.stream.AbstractFlowControlStrategy

com.firefly.codec.http2.stream.BufferingFlowControlStrategy

所有已实现的接口:

FlowControlStrategy

public class BufferingFlowControlStrategy
extends AbstractFlowControlStrategy

A flow control strategy that accumulates updates and emits window control frames when the accumulated value reaches a threshold.

The sender flow control window is represented in the receiver as two buckets: a bigger bucket, initially full, that is drained when data is received, and a smaller bucket, initially empty, that is filled when data is consumed. Only the smaller bucket can refill the bigger bucket.

The smaller bucket is defined as a fraction of the bigger bucket.

For a more visual representation, see the rocking bamboo fountain.

The algorithm works in this way.

The initial bigger bucket (BB) capacity is 100, and let's imagine the smaller bucket (SB) being 40% of the bigger bucket: 40.

The receiver receives a data frame of 60, so now BB=40; the data frame is passed to the application that consumes 25, so now SB=25. Since SB is not full, no window control frames are emitted.

The application consumes other 20, so now SB=45. Since SB is full, its 45 are transferred to BB, which is now BB=85, and a window control frame is sent with delta=45.

The application consumes the remaining 15, so now SB=15, and no window control frame is emitted.

字段概要

从类继承的字段 com.firefly.codec.http2.stream.AbstractFlowControlStrategy

log

从接口继承的字段 com.firefly.codec.http2.stream.FlowControlStrategy

DEFAULT_WINDOW_SIZE

构造器概要

构造器

构造器和说明
BufferingFlowControlStrategy(float bufferRatio)
BufferingFlowControlStrategy(int initialStreamSendWindow, float bufferRatio)

方法概要

限定符和类型	方法和说明
float	getBufferRatio()
void	onDataConsumed(SessionSPI session, StreamSPI stream, int length)
void	onStreamCreated(StreamSPI stream)
void	onStreamDestroyed(StreamSPI stream)
void	setBufferRatio(float bufferRatio)
String	toString()
void	windowUpdate(SessionSPI session, StreamSPI stream, WindowUpdateFrame frame)

从类继承的方法 com.firefly.codec.http2.stream.AbstractFlowControlStrategy

getInitialStreamRecvWindow, getInitialStreamSendWindow, getSessionStallTime, getStreamsStallTime, onDataReceived, onDataSending, onDataSent, onSessionStalled, onSessionUnstalled, onStreamStalled, onStreamUnstalled, onWindowUpdate, reset, updateInitialStreamWindow

从类继承的方法 java.lang.Object

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

构造器详细资料

BufferingFlowControlStrategy

public BufferingFlowControlStrategy(float bufferRatio)

BufferingFlowControlStrategy

public BufferingFlowControlStrategy(int initialStreamSendWindow,
                                    float bufferRatio)

方法详细资料

getBufferRatio

public float getBufferRatio()

setBufferRatio

public void setBufferRatio(float bufferRatio)

onStreamCreated

public void onStreamCreated(StreamSPI stream)

指定者:

onStreamCreated 在接口中 FlowControlStrategy

覆盖:

onStreamCreated 在类中 AbstractFlowControlStrategy

onStreamDestroyed

public void onStreamDestroyed(StreamSPI stream)

指定者:

onStreamDestroyed 在接口中 FlowControlStrategy

覆盖:

onStreamDestroyed 在类中 AbstractFlowControlStrategy

onDataConsumed

public void onDataConsumed(SessionSPI session,
                           StreamSPI stream,
                           int length)

windowUpdate

public void windowUpdate(SessionSPI session,
                         StreamSPI stream,
                         WindowUpdateFrame frame)

指定者:

windowUpdate 在接口中 FlowControlStrategy

覆盖:

windowUpdate 在类中 AbstractFlowControlStrategy

toString

public String toString()

覆盖:

toString 在类中 Object