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Chapter 62. Quartz

The quartz: component provides a scheduled delivery of messages using the Quartz scheduler. Each endpoint represents a different timer (in Quartz terms, a Trigger and JobDetail).

quartz://timerName?options
quartz://groupName/timerName?options
quartz://groupName/timerName/cronExpression       (@deprecated)
quartz://groupName/timerName/?cron=expression     (Apache Camel 2.0)
quartz://timerName?cron=expression                (Apache Camel 2.0)

The component uses either a CronTrigger or a SimpleTrigger. If no cron expression is provided, the component uses a simple trigger. If no groupName is provided, the quartz component uses the Camel group name.

You can append query options to the URI in the following format, ?option=value&option=value&...

Parameter Default Description
cron None Specifies a cron expression (not compatible with the trigger.\* or job.\* options).
trigger.repeatCount 0 SimpleTrigger: How many times should the timer repeat?
trigger.repeatInterval 0 SimpleTrigger: The amount of time in milliseconds between repeated triggers.
job.name null Sets the job name.
job._XXX_ null Sets the job option with the _XXX_ setter name.
trigger._XXX_ null Sets the trigger option with the _XXX_ setter name.
stateful false Uses a Quartz StatefulJob instead of the default job.
fireNow false New to Camel 2.2.0, if it is true will fire the trigger when the route is start when using SimpleTrigger.

For example, the following routing rule will fire two timer events to the mock:results endpoint:

from("quartz://myGroup/myTimerName?trigger.repeatInterval=2&trigger.repeatCount=1").routeId("myRoute").to("mock:result");

When using a StatefulJob, the JobDataMap is re-persisted after every execution of the job, thus preserving state for the next execution.

By default Quartz will look for a quartz.properties file in the root of the classpath. If you are using WAR deployments this means just drop the quartz.properties in WEB-INF/classes.

However the Camel Quartz component also allows you to configure properties:

Parameter Default Type Description
properties null Properties Camel 2.4: You can configure a java.util.Propoperties instance.
propertiesFile null String Camel 2.4: File name of the properties to load from the classpath

To do this you can configure this in Spring XML as follows

<bean id="quartz" class="org.apache.camel.component.quartz.QuartzComponent">
    <property name="propertiesFile" value="com/mycompany/myquartz.properties"/>
</bean>

Available as of Camel 2.4

The Quartz component offers an option to let the Quartz scheduler be started delayed, or not auto started at all.

Parameter Default Type Description
startDelayedSeconds 0 int Camel 2.4: Seconds to wait before starting the quartz scheduler.
autoStartScheduler true boolean Camel 2.4: Whether or not the scheduler should be auto started.

To do this you can configure this in Spring XML as follows

<bean id="quartz" class="org.apache.camel.component.quartz.QuartzComponent">
    <property name="startDelayedSeconds" value="5"/>
</bean>

Available as of Camel 2.4

If you use Quartz in clustered mode, e.g. the JobStore is clustered. Then from Camel 2.4 onwards the Quartz component will not pause/remove triggers when a node is being stopped/shutdown. This allows the trigger to keep running on the other nodes in the cluster.

Apache Camel adds the getters from the Quartz Execution Context as header values. The following headers are added: calendar, fireTime, jobDetail, jobInstance, jobRuntTime, mergedJobDataMap, nextFireTime, previousFireTime, refireCount, result, scheduledFireTime, scheduler, trigger, triggerName, triggerGroup.

The fireTime header contains the java.util.Date of when the exchange was fired.

Avaiable as of Apache Camel 2.0 Quartz supports Cron-like expressions for specifying timers in a handy format. You can use these expressions in the cron URI parameter; though to preserve valid URI encoding we allow + to be used instead of spaces. Quartz provides a little tutorial on how to use cron expressions.

For example the following will fire a message every five minutes starting at 12pm (noon) to 6pm on weekdays:

from("quartz://myGroup/myTimerName?cron=0+0/5+12-18+?+*+MON-FRI").to("activemq:Totally.Rocks");

which is equivalent to using the cron expression

0 0/5 12-18 ? * MON-FRI

The following table shows the URI character encodings we use to preserve valid URI syntax:

URI Character Cron character
\+ Space

@deprecated Quartz supports Cron-like expressions for specifying timers in a handy format. You can use these expressions in the URI; though to preserve valid URI encoding we allow / to be used instead of spaces and $ to be used instead of ?.

For example, the following endpoint URI will fire a message at 12pm (noon) every day

from("quartz://myGroup/myTimerName/0/0/12/*/*/$").to("activemq:Totally.Rocks");

which is equivalent to using the cron expression

0 0 12 * * ?

The following table shows the URI character encodings we use to preserve valid URI syntax:

URI Character Cron character
/ Space
$ ?

See also: