AckReceiverWindow (JGroups)

Class AckReceiverWindow

public class AckReceiverWindow extends Object

Counterpart of AckSenderWindow. Simple FIFO buffer. Every message received is ACK'ed (even duplicates) and added to a hashmap keyed by seqno. The next seqno to be received is stored in next_to_remove. When a message with a seqno less than next_to_remove is received, it will be discarded. The remove() method removes and returns a message whose seqno is equal to next_to_remove, or null if not found.
Change May 28 2002 (bela): replaced TreeSet with HashMap. Keys do not need to be sorted, and adding a key to a sorted set incurs overhead.

Author: Bela Ban

Constructor Summary
	AckReceiverWindow(long initial_seqno)

Constructor Summary

AckReceiverWindow(long initial_seqno)

Method Summary
void	add(long seqno, Message msg) Adds a new message.
String	printDetails()
Message	remove() Removes a message whose seqno is equal to `next_to_remove`, increments the latter.
void	reset()
int	size()
String	toString()

Method Summary

void

add(long seqno, Message msg)

Adds a new message.

String

printDetails()

Message

remove()

Removes a message whose seqno is equal to next_to_remove, increments the latter.

void

reset()

int

size()

String

toString()

Method Detail

public void add(long seqno, Message msg)

Adds a new message. Message cannot be null

public String printDetails()

public Message remove()

Removes a message whose seqno is equal to next_to_remove, increments the latter. Returns message that was removed, or null, if no message can be removed. Messages are thus removed in order.

public void reset()

public int size()

public String toString()