Red Hat Summit Red Hat SummitSupportConsoleDéveloppeursCommencer un essaiContact

Ce contenu n'est pas disponible dans la langue sélectionnée.

Chapter 9.  Scheduler

Read this chapter to learn about the role of timers in the Business Process Manager.
Timers can be created upon events in the process. Set them to trigger either action executions or event transitions.

9.1.  Timers
Copier lien

The easiest way to set a timer is by adding a timer element to the node. This sample code shows how to do so: 
<state name='catch crooks'>
  <timer name='reminder' 
         duedate='3 business hours' 
         repeat='10 business minutes'
         transition='time-out-transition' >
    <action class='the-remainder-action-class-name' />
  </timer>
  <transition name='time-out-transition' to='...' />
</state>
Copy to Clipboard Toggle word wrap
A timer specified on a node is not executed after that node is exited. Both the transition and the action are optional. When a timer is executed, the following events occur in sequence:
  1. an event of type timer is fired
  2. if an action is specified, it executes
  3. a signal is to resume execution over any specified transition
Every timer must have a unique name. If no name is specified in the timer element, the name of the node is used by default.
Use the timer action to support any action element (such as action or script.)
Timers are created and canceled by actions. The two pertinent action-elements are create-timer and cancel-timer. In actual fact, the timer element shown above is just short-hand notation for a create-timer action on node-enter and a cancel-timer action on node-leave.

9.2.  Scheduler Deployment
Copier lien

Process executions create and cancel timers, storing them in a timer store. A separate timer runner checks this store and execute each timers at the due moment.
Scheduler Components Overview
View larger image
Scheduler Components Overview

Figure 9.1. Scheduler Components Overview

Retour au début
Red Hat logoGithubredditYoutubeTwitter

Apprendre

Essayez, achetez et vendez

Communautés

À propos de la documentation Red Hat

Nous aidons les utilisateurs de Red Hat à innover et à atteindre leurs objectifs grâce à nos produits et services avec un contenu auquel ils peuvent faire confiance. Découvrez nos récentes mises à jour.

Rendre l’open source plus inclusif

Red Hat s'engage à remplacer le langage problématique dans notre code, notre documentation et nos propriétés Web. Pour plus de détails, consultez le Blog Red Hat.

À propos de Red Hat

Nous proposons des solutions renforcées qui facilitent le travail des entreprises sur plusieurs plates-formes et environnements, du centre de données central à la périphérie du réseau.

Theme

© 2025 Red Hat