OSGi™ Service Platform
Release 2

org.osgi.framework
Class ServiceEvent

java.lang.Object
  extended byjava.util.EventObject
      extended byorg.osgi.framework.ServiceEvent
All Implemented Interfaces:
java.io.Serializable

public class ServiceEvent
extends java.util.EventObject

A service lifecycle change event.

ServiceEvent objects are delivered to a ServiceListener objects when a change occurs in this service's lifecycle. A type code is used to identify the event type for future extendability.

OSGi reserves the right to extend the set of types.

See Also:
ServiceListener, Serialized Form

Field Summary
static int MODIFIED
          The properties of a registered service have been modified.
static int REGISTERED
          This service has been registered.
static int UNREGISTERING
          This service is in the process of being unregistered.
 
Fields inherited from class java.util.EventObject
source
 
Constructor Summary
ServiceEvent(int type, ServiceReference reference)
          Creates a new service event object.
 
Method Summary
 ServiceReference getServiceReference()
          Returns a reference to the service that had a change occur in its lifecycle.
 int getType()
          Returns the type of event.
 
Methods inherited from class java.util.EventObject
getSource, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

REGISTERED

public static final int REGISTERED
This service has been registered.

This event is synchronously delivered after the service has been registered with the Framework.

The value of REGISTERED is 0x00000001.

See Also:
BundleContext.registerService(java.lang.String[], java.lang.Object, java.util.Dictionary), Constant Field Values

MODIFIED

public static final int MODIFIED
The properties of a registered service have been modified.

This event is synchronously delivered after the service properties have been modified.

The value of MODIFIED is 0x00000002.

See Also:
ServiceRegistration.setProperties(java.util.Dictionary), Constant Field Values

UNREGISTERING

public static final int UNREGISTERING
This service is in the process of being unregistered.

This event is synchronously delivered before the service has completed unregistering.

If a bundle is using a service that is UNREGISTERING, the bundle should release its use of the service when it receives this event. If the bundle does not release its use of the service when it receives this event, the Framework will automatically release the bundle's use of the service while completing the service unregistration operation.

The value of UNREGISTERING is 0x00000004.

See Also:
ServiceRegistration.unregister(), BundleContext.ungetService(org.osgi.framework.ServiceReference), Constant Field Values
Constructor Detail

ServiceEvent

public ServiceEvent(int type,
                    ServiceReference reference)
Creates a new service event object.

Parameters:
type - The event type.
reference - A ServiceReference object to the service that had a lifecycle change.
Method Detail

getServiceReference

public ServiceReference getServiceReference()
Returns a reference to the service that had a change occur in its lifecycle.

This reference is the source of the event.

Returns:
Reference to the service that had a lifecycle change.

getType

public int getType()
Returns the type of event. The event type values are:

Returns:
Type of service lifecycle change.

OSGi™ Service Platform
Release 2

Copyright © OSGi Alliance (2000, 2002). All Rights Reserved. Licensed under the OSGi Specification License, Version 1.0