Chapter 24. Listeners

Listeners can be seen as hooks. They wait for a specific event and take a used-defined action if the event occurs.

Created listeners are shown in the Event Listener list (see Figure below). The list has the following columns:

Table 24.1. Event Listeners Table Description

Column name	Description
Listener type	Shows the graphic representation of each listener type.
Name	Show the name of the listener.
Event source description	Describes the event the listener is waiting for.
Task type	Shows the graphic representation of each task type.
Task description	Describes the task that will be activated if the set event occurs.
Monitoring details	Shows detailed monitoring information. By default, the column is collapsed (). Clicking the column header expands it, revealing details on the date of the last run and the number of successes and failures in last 24 hours.
Enabled	Indicates whether the listener is enabled () or disabled (). Clicking the icon enables/disables the listener.
Actions	By clicking the button, you can see details of the selected listener or delete it.

In case of listeners' events and tasks working with graphs, jobflows and profiler jobs, the button appears in their respective description fields. This buttong allows you to see the graph in the Sandboxes section of the Server Console GUI.

Figure 24.1. Listeners

The event is specific to the particular listener

Graph Event Listeners

Jobflow Event Listeners

JMS Messages Listeners

Universal Event Listeners

File Event Listeners (remote and local)

Task Failure Listeners

The available actions taken by the listeners are common for all listeners. The actions, that can be taken are: