jgroup.jini
Class LookupManager
java.lang.Object
|
+--jgroup.jini.LookupManager
- public class LookupManager
- extends java.lang.Object
The LookupManager class can be used to interrogate a
lookup service in order to obtain a proxy for a service.
LookupManager is only a convenience class, which
invokes the discovery protocol in order to obtain a
proxy for the lookup service and then interrogate it
opportunely. The Jgroup programmer can use different
techniques to perform the lookup, as illustrated in
the Jini specification.
In order to search for a group which has joined the
Jini federation, a GroupEntry entry containing the
group name must be included in the template.
- Since:
- Jgroup 1.1
- Author:
- Alberto Montresor
Constructor Summary |
private |
LookupManager()
Private constructor for singleton use |
Method Summary |
private void |
discarded(net.jini.discovery.DiscoveryEvent ev)
|
private void |
discovered(net.jini.discovery.DiscoveryEvent ev)
|
static java.lang.Object |
lookup(net.jini.core.lookup.ServiceTemplate template)
Perform a lookup in the lookup service, searching for the
specified object with the specified attributes. |
static java.lang.Object |
lookup(net.jini.core.lookup.ServiceTemplate template,
int timeout)
Perform a lookup in the lookup service, searching for the
specified object with the specified attributes. |
private java.lang.Object |
searchDiscovered(net.jini.core.lookup.ServiceTemplate template,
int timeout)
|
Methods inherited from class java.lang.Object |
, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait |
manager
private static LookupManager manager
- Singleton manager
registrars
private java.util.LinkedList registrars
LookupManager
private LookupManager()
throws java.io.IOException
- Private constructor for singleton use
- Throws:
java.io.IOException
- an error occurred in starting discovery
lookup
public static java.lang.Object lookup(net.jini.core.lookup.ServiceTemplate template)
throws java.io.IOException
- Perform a lookup in the lookup service, searching for the
specified object with the specified attributes.
- Parameters:
template
- template of the service to be searched- Returns:
- a proxy for the service, or null is no service can be
found with the specified template
- Throws:
java.io.IOException
- an error occurred in doing lookup
lookup
public static java.lang.Object lookup(net.jini.core.lookup.ServiceTemplate template,
int timeout)
throws java.io.IOException
- Perform a lookup in the lookup service, searching for the
specified object with the specified attributes.
- Parameters:
template
- template of the service to be searchedtimeout
- maximum time allowed for the lookup operation- Returns:
- a proxy for the service, or null is no service can be
found with the specified template
- Throws:
java.io.IOException
- an error occurred in doing lookup
discovered
private void discovered(net.jini.discovery.DiscoveryEvent ev)
discarded
private void discarded(net.jini.discovery.DiscoveryEvent ev)
searchDiscovered
private java.lang.Object searchDiscovered(net.jini.core.lookup.ServiceTemplate template,
int timeout)
throws java.rmi.RemoteException