Petals Documentation > Petals ESB > Petals Components > Petals-SE-QUARTZ

Petals-SE-QUARTZ

Features


This component schedules jobs to trigger services invokations within the JBI bus. The jobs are based on time policies.

It is relying on the Quartz open source project.

This component only acts as a service consumer and doesn't act as a service provider. You use it to start another treatment managed by another service.

For more details about Quartz usage, see url : http://www.quartz-scheduler.org/

Component Configuration


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Service Configuration

Job scheduling

CONSUME SERVICE : Call a JBI service according to a time expression.

Service Unit Descriptor

The Quartz component is configured with a cron expression, a service to call and an XML message request to send to the service.

You have to deploy a Service Unit with a JBI descriptor containing a consumes section and the parameters.

Here is a sample of a SU JBI descriptor to call a Hello service with <text>hello</text> message, at 10:15am every day during the year 2005 :

<?xml version="1.0" encoding="UTF-8"?>

<!-- JBI descriptor for PEtALS' "petals-se-quartz" (QUARTZ), version 1.0 -->
<jbi:jbi version="1.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:jbi="http://java.sun.com/xml/ns/jbi"
    xmlns:quartz="http://petals.ow2.org/components/quartz/version-1.0"
    xmlns:petalsCDK="http://petals.ow2.org/components/extensions/version-4.0"
    xmlns:generatedNs="http://petals.ow2.org/components/hello/version-3.0">

  <!-- Import a Service into PEtALS or Expose a PEtALS Service => use a BC. -->
  <jbi:services binding-component="false">

    <!-- Expose a PEtALS Service => consumes a Service. -->
    <jbi:consumes
        interface-name="generatedNs:Hello"
        service-name="generatedNs:HelloSrv"
        endpoint-name="HelloSrvEndpoint">

      <!-- CDK specific elements -->
      <petalsCDK:operation>sayHelloOperation</petalsCDK:operation>
      <petalsCDK:mep>InOnly</petalsCDK:mep>

      <!-- Component specific elements -->
      <quartz:cron-expression>0 15 10 * * ? 2005</quartz:cron-expression>
      <quartz:content><![CDATA[ <text>hello</text> ]]> </quartz:content>
    </jbi:consumes>
  </jbi:services>
</jbi:jbi>
Configuration of a Service Unit to consume a service (JBI)

Parameter Description Default Required
consumes Refer JBI service to invoke into the JBI bus.
You can define an explicit endpoint: interface (QName) / Service (QName) / Endpoint (String) attributes.
Or define implicit endpoint, to let the container routing according to QOS configurations (HA...):
-by Interface attribute (QName)
-by Service attribute (QName) 		- Yes


Configuration of a Service Unit to consume a service (CDK)

Parameter Description Default Required
mep Message exchange pattern abbreviation. This parameter can be used in conjunction with the method of the CDK Listeners: createMessageExchange(Extensions extensions).
This method returns a CDK Exchange corresponding to the type of the specified pattern. 		- Yes
operation Operation to call on a service. This parameter can be used in conjunction with the sending methods of the Listeners. If no operation is specified in the Message Exchange to send, this parameter will be used. - No
timeout Timeout in milliseconds of a synchronous send. This parameter can be used in conjunction with the sendSync(Exchange exchange) method of the Listeners. Set 0 for an infinite timeout. 30000 No

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