The IlvThreadedActivityMonitorProperty class is a
named property used to attach a IlvThreadedActivityMonitor to an IlvManager
IlvManager
.
This threaded monitor is a centralized
object with which threads should register their activities. The
activities, that is, tasks, must also notify this controller of
their progress.
All activity listeners registered with this controller are notified
in turn of any activity progress. The IlvThreadedActivityMonitorPanel is one such
important listener. This bean provides the user with feedback on
activities that are currently running, see Using the GUI beans.
The source code for the Map Builder demonstration, which contains
all of the code described in this section, can be found at <installdir> /jviews-maps810/samples/mapbuilder/index.html.
Accessing the threaded activity monitor
You can access the threaded activity
monitor by calling:
IlvThreadedActivityMonitor mon = IlvThreadedActivityMonitorProperty.GetThreadedActivityMonitor(manager);
Providing threaded activity information
It is the responsibility of each thread to
register, update and unregister their activities to provide the
user with correct information on the background tasks that are
running:
mon.updateActivityProgress(activityID,10,"doing something long"); ... do something long that takes 10% of total time... mon.updateActivityProgress(activityID,20,"doing another thing"); ...
Setting the activity progress to 100% or
unregistering the activity removes it from the list currently
managed by the monitor.
Registering objects as listeners
You can also register your own objects as
listeners to changes in the activity monitor with lines of code
such as:
mon.addActivityListener(new IlvThreadedActivityMonitor.ActivityListener() {
public void activityChanged(ActivityEvent e) {
if(e.getEventType() ==
IlvThreadedActivityMonitor.ActivityEvent.ACTIVITY_REMOVED) {
... an activity just ended, do something.
}
});