Apache Camel: Quartz

Quartz Component

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).

Using cron expressions

Configuring the cron expression in Camel 1.x is based on path separators. We changed this to an URI option in Camel 2.0, allowing a more elegant configuration.
Also it is not possible to use the / cron special character (for increments) in Camel 1.x, which Camel 2.0 also fixes.

URI format

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

Options

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.

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").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.

Message Headers

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.

Using Cron Triggers

Avaiable as of 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 at 12pm (noon) every day

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

Using Cron Triggers in Camel 1.x

@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
`$`	`?`

Quartz Component

URI format

Options

Message Headers

Using Cron Triggers

Using Cron Triggers in Camel 1.x

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