Package org.osgi.framework

Class ServiceEvent

java.lang.Object

java.util.EventObject

org.osgi.framework.ServiceEvent

All Implemented Interfaces:

Serializable

public class ServiceEvent
extends EventObject

An event from the Framework describing a service lifecycle change.

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

OSGi Alliance reserves the right to extend the set of types.

See Also:

ServiceListener, AllServiceListener, Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	MODIFIED	The properties of a registered service have been modified.
static int	MODIFIED_ENDMATCH	The properties of a registered service have been modified and the new properties no longer match the listener's filter.
static int	REGISTERED	This service has been registered.
static int	UNREGISTERING	This service is in the process of being unregistered.

Constructor Summary

Constructors

Constructor	Description
ServiceEvent(int type, ServiceReference<?> reference)	Creates a new service event object.

Method Summary

Modifier and Type	Method	Description
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

equals, 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.

See Also:

BundleContext.registerService(String[],Object,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.

See Also:

ServiceRegistration.setProperties(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.

See Also:

ServiceRegistration.unregister(), BundleContext.ungetService(ServiceReference), Constant Field Values

MODIFIED_ENDMATCH

public static final int MODIFIED_ENDMATCH

The properties of a registered service have been modified and the new properties no longer match the listener's filter.

This event is synchronously delivered after the service properties have been modified. This event is only delivered to listeners which were added with a non-null filter where the filter matched the service properties prior to the modification but the filter does not match the modified service properties.

Since:

1.5

See Also:

ServiceRegistration.setProperties(Dictionary), 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
• MODIFIED_ENDMATCH
• UNREGISTERING

Returns:

Type of service lifecycle change.