IBM BPM, V8.0.1, All platforms > Authoring services in Integration Designer > Developing business processes > Building human tasks > Create an escalation for your human task

Notifying an event handler of an escalation

You can use customized notification event handlers within your application environment to deal with escalations in your human task model.

To implement notification event handlers, you can use either the NotificationEventHandlerPlugin interface, or you can extend the default com.ibm.task.spi.NotificationEventHandler service provider interface (SPI) implementation class.

To configure an event and add it to your business application model, follow these instructions.


Procedure

  1. Implement an event handler according to the steps below.

    You can package the implementation class of the com.ibm.task.spi.NotificationEventHandlerPlugin into the same application as your human task, or you can put it into a dependent utility project. This section describes how you add the notification event handler implementation class to the same application as the human task.

    1. In the Java™ perspective, right-click your Java module, and select New > Class.

    2. In the New Java Class wizard, choose a Package and a Name for your new Class and click Add beside the Interfaces field.

    3. In the Implemented Interfaces Selection window, begin typing notif until a list of matching types appear, choose NotificationEventHandlerPlugin, and click Finish.
    Here is an example of an implementation of the escalationNotification method. 
    public void escalationNotification(Task task, Escalation escalation) {

  System.out.println("--- Notification event received: " + DateFormat.getDateTimeInstance().format( new   Date(System.currentTimeMillis())));;

  if(task != null)
  {
    System.out.println("Task template name: " + task.getTaskTemplateName());
    System.out.println("Task name: " + task.getName());
    System.out.println("Event handler name: " + task.getEventHandlerName());
    System.out.println("Is escalated: " + task.isEscalated());
  }   else
  {
    System.out.println("Task is null");
  } 
  System.out.println("Notification event received.");

  if(escalation != null)
  {
    System.out.println("Escalation name: " + escalation.getName());
    System.out.println("Escalate within: " + escalation.getDurationUntilEscalated());
    System.out.println("Repeat notification every: " + escalation.getDurationUntilRepeated());
  }   else
  {
    System.out.println("Escalation is null");
  }   System.out.println("--- End notification event");

  2. Create a service provider configuration file for the plug-in. This configuration file provides the mechanism for identifying and loading the plug-in, and conforms to the Java 2 service provider interface specification.

    1. In the META-INF/services/ directory of your JAR file, create a file with the name com.ibm.task.spi.plug-in_nameNotificationEventHandlerPlugin, where plug-in_name is the name of the plug-in.

      For example, if your plug-in is called HelpDeskRequest (event handler name) and it implements the com.ibm.task.spi.NotificationEventHandlerPlugin interface, the name of the configuration file is com.ibm.task.spi.HelpDeskRequestNotificationEventHandlerPlugin.

    2. In the first line of the file that is neither a comment line nor a blank line, specify the fully qualified name of your plug-in class.

      For example, if your plug-in class is called MyEventHandler, and it is in the com.customer.plugins package, then the first line of the configuration file must contain the following entry: com.customer.plugins.MyEventHandler.

  3. Declare a notification event handler for your task as described here:

    1. In the human task editor click the Details tab.

    2. In the Event handler name field, enter a name for your notification event handler.

      This name is not the name of the implementation class, it is the name that you gave the event handler.

    3. Click Save.

  4. Add your plugin to your application:

    1. Switch to the Resource perspective.

    2. In the Navigator, expand your business integration project.

    3. In the META-INF folder, create a new folder services.
    4. Right-click the services folder and select New > File .

    5. In the File name field of the New File wizard, enter com.ibm.task.spi. EventHandlerNameNotificationEventHandlerPlugin Where EventHandlerName is the event handler name you have specified for your task.

    6. Click Finish. The editor opens for the new file. In the editor, add a line with the fully qualified class name of your implementation class: bpc.samples.plugin.EscalationNotificationPlugin.

    7. Click Save.

  5. Specify an escalation with a notification type Event:

    1. Switch to the Business Integration perspective and open your task in the human task editor.

    2. In the Escalation settings section, select the escalation.

    3. Click the Details tab.

    4. Configure the escalation as needed (for help, see the Related tasks section below). For Notification type, choose Event from the list of available options.
    5. Save your work.


Example

To see an example of an escalation that uses a customized notification event handler, go to http://publib.boulder.ibm.com/bpcsamp/index.html, and click Human Task features > Escalation.

You will need a connection to the internet to view this example.

Building human tasks

Create an escalation for your human task


Related tasks:
Create an escalation for your human task
Selecting a calendar type for your escalation
Setting duration values for your human task
Defining timer-driven behavior in a BPEL process
Use business calendars within human tasks


Related reference:
Details tab: business state machine editor
Duration tab: Human Task editor


Related information:

Interface UserCalendar