de.stz.bt.fnd
Class FND_InvokeIDPool

java.lang.Object
  java.lang.Thread
      de.stz.bt.fnd.FND_InvokeIDPool

All Implemented Interfaces:

java.lang.Runnable

public class FND_InvokeIDPool

extends java.lang.Thread

Implementation of the ID Pool where the IDs of the sent and received UDP packets are managed. When an FND Datagram is being sent by the LZ, an InvokeID is being removed from the LZ's SP (send pool) and being transmitted to the Insel. Sent invoke_ids are being stored in the ShadowSendInvokeId so they can be timed out if the island crashed and the InvokeId never "comes back". When an FND Datagram is being received by the LZ, its InvokeID is being stored in the InvokeIdReceivePool. Upon sending the reply, the invokeID is being removed from the InvokeIdReceivePool, and being "handed back" with the reply to the Insel. The number of InvokeIDs created in the send pool is max_invoke. TODO: A timeout mechanism kills "old" (timed out) invokeIDs from the pools, as the requests they belong to must have timed out already.

Version:

$Id: FND_InvokeIDPool.html,v 1.1 2004/11/08 08:10:45 jseitter Exp $

Author:

Philipp Haeuser

Field Summary

private static org.apache.log4j.Logger	logger
static int	max_invoke
(package private) java.util.LinkedList	sendInvokeIDPool
(package private) java.util.LinkedList	shadowSendInvokeIDPool

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

FND_InvokeIDPool()

Method Summary

private boolean	addID(java.util.LinkedList checkList, FND_InvokeID checkId)
boolean	addSendInvokeID(FND_InvokeID addID)
FND_InvokeID	getFreeSendID()
private boolean	hasID(java.util.LinkedList checkList, FND_InvokeID checkId)
boolean	hasSendInvokeID(FND_InvokeID checkId)
private boolean	removeID(java.util.LinkedList checkList, FND_InvokeID checkId)
void	run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

sendInvokeIDPool

java.util.LinkedList sendInvokeIDPool

shadowSendInvokeIDPool

java.util.LinkedList shadowSendInvokeIDPool

logger

private static org.apache.log4j.Logger logger

max_invoke

public static final int max_invoke

See Also:

Constant Field Values

Constructor Detail

FND_InvokeIDPool

public FND_InvokeIDPool()

Method Detail

run

public void run()

addID

private boolean addID(java.util.LinkedList checkList,
                      FND_InvokeID checkId)

removeID

private boolean removeID(java.util.LinkedList checkList,
                         FND_InvokeID checkId)

addSendInvokeID

public boolean addSendInvokeID(FND_InvokeID addID)

getFreeSendID

public FND_InvokeID getFreeSendID()

hasID

private boolean hasID(java.util.LinkedList checkList,
                      FND_InvokeID checkId)

hasSendInvokeID

public boolean hasSendInvokeID(FND_InvokeID checkId)