org.osgi.service.dmt

Interface DmtEventListener

public interface DmtEventListener

Registered implementations of this class are notified via DmtEvent objects about important changes in the tree. Events are generated after every successful DMT change, and also when sessions are opened or closed. If a DmtSession is opened in atomic mode, DMT events are only sent when the session is committed, when the changes are actually performed.

Dmt Event Listener services must have permission DmtPermission.GET for the nodes in the nodes and newNodes property in the Dmt Event.

Field Summary

Fields

Modifier and Type	Field and Description
static String	FILTER_EVENT A number of event types packed in a bitmap.
static String	FILTER_PRINCIPAL A number of names of principals.
static String	FILTER_SUBTREE A number of sub-tree top nodes that define the scope of the Dmt Event Listener.

Method Summary

Modifier and Type	Method and Description
void	changeOccurred(DmtEvent event) DmtAdmin uses this method to notify the registered listeners about the change.

Field Detail

FILTER_SUBTREE

static final String FILTER_SUBTREE

A number of sub-tree top nodes that define the scope of the Dmt Event Listener. If this service property is registered then the service must only receive events for nodes that are part of one of the sub-trees. The type of this service property is String+.

See Also:

Constant Field Values

FILTER_PRINCIPAL

static final String FILTER_PRINCIPAL

A number of names of principals. If this service property is provided with a Dmt Event Listener service registration than that listener must only receive events for which at least one of the given principals has Get rights. The type of this service property is String+.

See Also:

Constant Field Values

FILTER_EVENT

static final String FILTER_EVENT

A number of event types packed in a bitmap. If this service property is provided with a Dmt Event Listener service registration than that listener must only receive events where one of the Dmt Event types occur in the bitmap. The type of this service property must be Integer.

See Also:

Constant Field Values

Method Detail

changeOccurred

void changeOccurred(DmtEvent event)

DmtAdmin uses this method to notify the registered listeners about the change. This method is called asynchronously from the actual event occurrence.

Parameters:

event - the DmtEvent describing the change in detail