Access schedulers

Each configured scheduler is available using the Scheduler API from a JEE server application, such as a servlet or EJB module. Use a Java Naming and Directory Interface (JNDI). name or resource reference to access schedulers. Each scheduler is also available using the Java™ Management Extensions (JMX) API, using its associated WASScheduler MBean.

Scheduler and WASScheduler interfaces are the starting point for all scheduler activities. Each scheduler is independent and allows task life cycle operations, such as creating new tasks.

1. Locate schedulers using the javax.naming.Context.lookup() method from a Java EE server application, such as a servlet or EJB module like the following example:

   //lookup the scheduler to be used import com.ibm.websphere.scheduler.Scheduler;
   import javax.naming.InitialContext;
   Scheduler scheduler = (Scheduler)new InitialContext.lookup("java:comp/env/sched/MyScheduler");

2. Use wsadmin to locate a WASScheduler MBean using JACL scripting:

   set jndiName sched/MyScheduler
   
   # Map the JNDI name to the mbean name.  The mbean name is 
   # formed by replacing the / in the JNDI namewith . and prepending 
   # Scheduler_ 
   regsub -all {/} $jndiName "." jndiName
   set mbeanName Scheduler_$jndiName
   
   puts "Looking-up Scheduler MBean $mbeanName"
   set sched [$AdminControl queryNames WebSphere:*,type=WASScheduler,name=$mbeanName]
   puts $sched

Results

The scheduler is now available to use from a Java EE server application or from a JMX API client. To create a task see the topics, Developing a task that calls a session bean or Developing a task that sends a JMS message.

Related tasks

Develop and scheduling tasks

Develop a task that calls a session bean

Develop a task that sends a Java Message Service message

MBean API documentation