org.osgi.framework
Class ServiceEvent

java.lang.Object
  java.util.EventObject
      org.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:

• REGISTERED
• MODIFIED
• UNREGISTERING

Returns:

Type of service lifecycle change.