Available as of Camel 2.12.0
The quartz2: component provides a scheduled delivery of messages using the Quartz Scheduler 2.x .
Each endpoint represents a different timer (in Quartz terms, a Trigger and JobDetail).
Maven users will need to add the following dependency to their pom.xml for this component:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-quartz2</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency>
NOTE: Quartz 2.x API is not compatible with Quartz 1.x. If you need to remain on old Quartz 1.x, please use the old Quartz component instead.
quartz2://timerName?options quartz2://groupName/timerName?options quartz2://groupName/timerName?cron=expression quartz2://timerName?cron=expression
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 |
---|---|---|
|
None |
Specifies a cron expression (not compatible with the |
|
|
SimpleTrigger: How many times should the timer repeat? |
|
|
SimpleTrigger: The amount of time in milliseconds between repeated triggers.
Must enable |
|
|
Sets the job name. |
|
|
Sets the job option with the XXX setter name. |
|
|
Sets the trigger option with the XXX setter name. |
|
|
Uses a Quartz |
|
|
If it is true will fire the trigger when the route is start when using SimpleTrigger. |
|
|
If set to true, then the trigger automatically delete when route stop. Else if set to false, it will remain in scheduler. When set to false, it will also mean user may reuse pre-configured trigger with camel Uri. Just ensure the names match. Notice you cannot have both deleteJob and pauseJob set to true. |
|
|
If set to true, then the trigger automatically pauses when route stop. Else if set to false, it will remain in scheduler. When set to false, it will also mean user may reuse pre-configured trigger with camel Uri. Just ensure the names match. Notice you cannot have both deleteJob and pauseJob set to true. |
|
|
Camel 2.12.4/2.13: Whether or not the job should remain stored after it is orphaned (no triggers point to it). |
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Camel 2.12.4/2.13: Instructs the scheduler whether or not the job should be re-executed if a 'recovery' or 'fail-over' situation is encountered. |
For example, the following routing rule will fire two timer events to the
mock:results
endpoint:
from("quartz2://myGroup/myTimerName?trigger.repeatInterval=2&trigger.repeatCount=1" ).routeId("myRoute").to("mock:result");
When using stateful=true
, the JobDataMap is re-persisted after every execution of the job, thus preserving state
for the next execution.
Running in OSGi and having multiple bundles with quartz routes
If you run in OSGi such as Apache ServiceMix, or Apache Karaf, and have multiple
bundles with Camel routes that start from Quartz2 endpoints, then make sure
if you assign an id
to the <camelContext> that this id is unique, as this
is required by the QuartzScheduler
in the OSGi container. If you do not set any
id
on <camelContext> then a unique id is auto assigned, and there is no
problem.
By default Quartz will look for a quartz.properties
file in the
org/quartz
directory of the classpath. If you are using WAR deployments this
means just drop the quartz.properties in WEB-INF/classes/org/quartz
.
However the Camel Quartz2 component also allows you to configure properties:
Parameter |
Default |
Type |
Description |
---|---|---|---|
|
|
|
You can configure a |
|
|
|
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.quartz2.QuartzComponent"> <property name="propertiesFile" value="com/mycompany/myquartz.properties"/> </bean>
You need to configure the quartz scheduler properties to enable JMX.
That is typically setting the option "org.quartz.scheduler.jmx.export"
to
a true
value in the configuration file.
From Camel 2.13 onwards Camel will automatic set this option to true, unless explicit disabled.
The Quartz2 component offers an option to let the Quartz scheduler be started delayed, or not auto started at all.
Parameter |
Default |
Type |
Description |
---|---|---|---|
|
|
|
Seconds to wait before starting the quartz scheduler. |
|
|
|
Whether or not the scheduler should be auto started. |
To do this you can configure this in Spring XML as follows
<bean id="quartz2" class="org.apache.camel.component.quartz2.QuartzComponent"> <property name="startDelayedSeconds" value="5"/> </bean>
If you use Quartz in clustered mode, e.g. the JobStore
is clustered. Then
the Quartz2 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.
Note: When running in clustered node no checking is done to ensure unique job name/group for endpoints.
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.
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.
For example, the following will fire a message every five minutes starting at 12pm (noon) to 6pm on weekdays:
from("quartz2://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 |
The Quartz Scheduler allows you to configure time zone per trigger. For example to use a timezone of your country, then you can do as follows:
quartz2://groupName/timerName?cron=0+0/5+12-18+?+*+MON-FRI&trigger.timeZone=Europe /Stockholm
The timeZone value is the values accepted by java.util.TimeZone
.
The Quartz2 component provides a Polling Consumer scheduler which allows to use cron based scheduling for Polling Consumer such as the File and FTP consumers.
For example to use a cron based expression to poll for files every 2nd second, then a Camel route can be define simply as:
from("file:inbox?scheduler=quartz2&scheduler.cron=0/2+*+*+*+*+?") .to("bean:process");
Notice we define the scheduler=quartz2
to instruct Camel to use the Quartz2 based scheduler. Then we
use scheduler.xxx
options to configure the scheduler. The Quartz2 scheduler requires the
cron option to be set.
The following options is supported:
Parameter |
Default |
Type |
Description |
---|---|---|---|
|
|
|
To use a custom Quartz scheduler. If none configure then the shared scheduler from the Quartz2 component is used. |
|
|
|
Mandatory: To define the cron expression for triggering the polls. |
|
|
|
To specify the trigger id. If none provided then an UUID is generated and used. |
|
|
|
To specify the trigger group. |
|
|
|
The time zone to use for the CRON trigger. |
Important: Remember configuring these options from the
endpoint URIs must be prefixed
with scheduler..
For example to configure the trigger id and group:
from("file:inbox?scheduler=quartz2&scheduler.cron=0/2+*+*+*+*+?&scheduler.trigger Id=myId&scheduler.triggerGroup=myGroup") .to("bean:process");
There is also a CRON scheduler in Spring, so you can use the following as well:
from("file:inbox?scheduler=spring&scheduler.cron=0/2+*+*+*+*+?") .to("bean:process");