Configure timer managers

A timer manager acts as a thread pool for application components that use asynchronous beans. Use the administrative console to configure timer managers. The timer manager service is enabled by default.

If we are not familiar with timer managers, review the conceptual section, Timer managers, in the Asynchronous beans topic.

We can define multiple timer managers for each cell. Each timer manager is bound to a unique place in Java Naming and Directory Interface (JNDI).

Important: The timer manager service is only supported from within the Enterprise Java Beans (EJB) container or web container. Looking up and using a configured timer manager from a JEE application client container is not supported.

1. Start the administrative console.

2. Select Resources > Asynchronous beans > Timer managers.

3. Specify a Scope value and click New.

4. Specify the following required properties:

   Scope

   The scope of the configured resource. This value indicates the location for the configuration file.

   Name

   The display name for the timer manager.

   JNDI Name

   The Java Naming and Directory Interface (JNDI) name for the timer manager. This name is used by asynchronous beans that must look up the timer manager. Each timer manager must have a unique JNDI name within the cell.

   Number of Timer Threads

   The maximum number of threads used for timers.

5. [Optional] Specify a Description and a Category for the timer manager.

6. [Optional] Select the Service Names (Java EE contexts) on which we want this timer manager to be made available. Any asynchronous beans that use this timer manager then inherit the selected Java EE contexts from the component that creates the bean. The list of selected services also is known as the "sticky" context policy for the timer manager. Selecting more services than required might impede performance.

7. [Optional] Select Custom Properties > New. Other optional fields include:

   Name

   lateTimerTime

   Value

   Number of seconds

   Description

   Specify a description

   Type

   Select java.lang.String

   The lateTimerTime custom property is the number of seconds beyond which a late-firing timer causes an informational message to be logged. The informational message is logged once per timer manager. The default value is 5 seconds and a value of 0 disables this property.

8. Save the configuration.

Results

The timer manager is now configured and ready for access by application components that must manage the start of asynchronous code.

• Timer manager collection
  Use this page to view the configuration properties of timer managers, which enable applications to schedule future timer notifications and to receive timer notification callbacks to application-specified listeners within a JEE environment. The timer manager binds to the JNDI name space.

Related concepts

Asynchronous beans

Related tasks

Configure timer manager custom properties