CronScheduledRoutePolicy

CronScheduledRoutePolicy is a ScheduledRoutePolicy that facilitates route activation, de-activation, suspension and resumption of routes based on a Quartz CronTrigger.

Maven users will need to add a camel-quartz dependency to their pom.xml to avail this capability.

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-quartz</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>
Relationship to the Quartz component

All Scheduled route policies share the scheduler created by the Quartz component. In this way, scheduler, jobs and triggers can be managed in a common and consistent way.

Using cron scheduled route policy

In order to use a CronScheduledRoutePolicy it is necessary to instantiate an object of the type org.apache.camel.routepolicy.quartz.CronScheduledRoutePolicy.

In order to perform a route operation at a given time the following information must be provided.

Starting a route

Parameter Name Type Default Value Description

routeStartTime

String

the initial scheduled Date and time as a Cron Expression for route start

Stopping a route

Parameter Name Type Default Value Description

routeStopTime

String

the initial scheduled Date and time as a Cron Expression for route stop

routeStopGracePeriod

int

10 seconds

the time period to wait before initiating graceful route stop

routeStopTimeUnit

long

TimeUnit.MILLISECONDS

the time unit for the grace period expressed as java.util.concurrent.TimeUnit

Suspending a route

Parameter Name Type Default Value Description

routeSuspendTime

String

the initial scheduled Date and time as a Cron Expression for route suspension

Resuming a route

Parameter Name Type Default Value Description

routeResumeTime

String

the initial scheduled Date and time as a Cron Expression for route resumption

Configuring the policy

Once the org.apache.camel.routepolicy.quartz.CronScheduledRoutePolicy is created it can be wired into the camel route as follows:

In Java:

CronScheduledRoutePolicy startPolicy = new CronScheduledRoutePolicy();
startPolicy.setRouteStartTime("*/3 * * * * ?");

from("direct:start")
    .routeId("testRoute").routePolicy(startPolicy).noAutoStartup()
    .to("mock:success");

And with Spring XML:

<bean id="startPolicy" class="org.apache.camel.routepolicy.quartz.CronScheduledRoutePolicy">
    <property name="routeStartTime" value="*/3 * * * * ?"/>
</bean>

<camelContext xmlns="http://camel.apache.org/schema/spring">
    <route id="testRoute" routePolicyRef="startPolicy" autoStartup="false">
        <from uri="direct:start"/>
        <to uri="mock:success"/>
    </route>
</camelContext>
Notice how the route to be scheduled MUST be configured to not autostartup, to let the route scheduler take control of starting and stopping the route accordingly.
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