net.jini.lookup

Class ServiceDiscoveryManager.LookupCacheImpl.UnmapProxyTask

java.lang.Object

net.jini.lookup.ServiceDiscoveryManager.CacheTask

net.jini.lookup.ServiceDiscoveryManager.ServiceIdTask

net.jini.lookup.ServiceDiscoveryManager.LookupCacheImpl.UnmapProxyTask

All Implemented Interfaces:

TaskManager.Task, Runnable

Enclosing class:

ServiceDiscoveryManager.LookupCacheImpl

private final class ServiceDiscoveryManager.LookupCacheImpl.UnmapProxyTask
extends ServiceDiscoveryManager.ServiceIdTask

Task class used to asynchronously disassociate the given lookup service proxy from the given ServiceItemReg. This task is created and queued in both the LookupTask, and the ProxyRegDropTask. When the LookupTask determines that the service referenced by the given ServiceItemReg is an "orphan", the LookupTask queues an instance of this task. A service is an orphan if it is referenced in the serviceIdMap, but is no longer registered in any of the lookup service(s) to which it is mapped in the serviceIdMap. Note that the existence of orphans is possible when events from a particular lookup service are missed; that is, there is a "gap" in the event sequence numbers. When a previously discovered lookup service is discarded, the ProxyRegDropTask is initiated, and that task creates and queues an instance of this task for each mapping in this cache's serviceIdMap. This task removes the given lookup service proxy from the set associated with the service item referenced in the given ServiceItemReg, and determines whether that service is still associated with at least one lookup service. If the service is no longer associated with any other lookup service in the managed set of lookup services, the mapping that references the given ServiceItemReg is removed from the serviceIdMap, and a serviceRemoved event is sent. In this way, other tasks from this cache operating on the same service will not concurrently modify any state related to that service.

Field Summary

Fields

Modifier and Type	Field and Description
private ServiceDiscoveryManager.ServiceItemReg	itemReg

Fields inherited from class net.jini.lookup.ServiceDiscoveryManager.ServiceIdTask

thisTaskSid

Fields inherited from class net.jini.lookup.ServiceDiscoveryManager.CacheTask

reg, thisTaskSeqN

Constructor Summary

Constructors

Constructor and Description
ServiceDiscoveryManager.LookupCacheImpl.UnmapProxyTask(ServiceDiscoveryManager.ProxyReg reg, ServiceDiscoveryManager.ServiceItemReg itemReg, ServiceID srvcId, long seqN)

Method Summary

Methods

Modifier and Type	Method and Description
void	run()

Methods inherited from class net.jini.lookup.ServiceDiscoveryManager.ServiceIdTask

getServiceID, runAfter

Methods inherited from class net.jini.lookup.ServiceDiscoveryManager.CacheTask

getProxyReg, getSeqN, isFromProxy

Methods inherited from class java.lang.Object

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

Field Detail

itemReg

private ServiceDiscoveryManager.ServiceItemReg itemReg

Constructor Detail

ServiceDiscoveryManager.LookupCacheImpl.UnmapProxyTask

public ServiceDiscoveryManager.LookupCacheImpl.UnmapProxyTask(ServiceDiscoveryManager.ProxyReg reg,
                                                      ServiceDiscoveryManager.ServiceItemReg itemReg,
                                                      ServiceID srvcId,
                                                      long seqN)

Method Detail

run

public void run()

Specified by:

run in interface Runnable

Specified by:

run in class ServiceDiscoveryManager.CacheTask