org.jgroups.stack
public class Retransmitter extends Object
add()
method adds a range of sequence numbers of messages to be retransmitted. The
remove()
method removes a sequence number again, cancelling retransmission requests for it.
Whenever a message needs to be retransmitted, the RetransmitCommand.retransmit()
method is called.
It can be used e.g. by an ack-based scheme (e.g. AckSenderWindow) to retransmit a message to the receiver, or
by a nak-based scheme to send a retransmission request to the sender of the missing message.
Version: $Revision: 1.10 $
Nested Class Summary | |
---|---|
interface | Retransmitter.RetransmitCommand Retransmit command (see Gamma et al.) used to retrieve missing messages |
Field Summary | |
---|---|
protected static Log | log |
Constructor Summary | |
---|---|
Retransmitter(Address sender, Retransmitter.RetransmitCommand cmd, TimeScheduler sched)
Create a new Retransmitter associated with the given sender address | |
Retransmitter(Address sender, Retransmitter.RetransmitCommand cmd)
Create a new Retransmitter associated with the given sender address |
Method Summary | |
---|---|
void | add(long first_seqno, long last_seqno)
Add the given range [first_seqno, last_seqno] in the list of
entries eligible for retransmission. |
static void | main(String[] args) |
void | remove(long seqno)
Remove the given sequence number from the list of seqnos eligible
for retransmission. |
void | reset()
Reset the retransmitter: clear all msgs and cancel all the
respective tasks |
void | setRetransmitTimeouts(long[] timeouts) |
int | size() |
void | stop()
Stop the rentransmition and clear all pending msgs.
|
String | toString() |
Parameters: sender the address from which retransmissions are expected or to which retransmissions are sent cmd the retransmission callback reference sched retransmissions scheduler
Parameters: sender the address from which retransmissions are expected or to which retransmissions are sent cmd the retransmission callback reference
If retransmitter thread is suspended, wake it up
If this retransmitter has been provided an externally managed scheduler, then just clear all msgs and the associated tasks, else stop the scheduler. In this case the method blocks until the scheduler's thread is dead. Only the owner of the scheduler should stop it.