Apache Camel quartz2 cron misfire

Question

I am using Apache Camel with spring boot and a camel-config.xml file. I created a simple route that runs every second and runs a class method:

<camelContext xmlns="http://camel.apache.org/schema/spring" id="myContext" trace="true" streamCache="true" useMDCLogging="true">       
    <route id="testCron">
        <from uri="quartz2://TestCron?cron=0/1 * * * * ?" />
        <to uri="bean:folder.MyClass?method=test" />
    </route>
</camelContext>

The class simply has a counter int that is incremented and displayed:

package folder;

public class MyClass {

    private static int count = 0;

    public static void test(Exchange exchange) throws Exception {
        count = count + 1;
        System.out.println(count);
    }    

}

I have another piece of code (irrelevant to show) that can start and stop the above route. The issue I am having is when stopping the route, waiting 5 seconds and start it back.

Instead of continuing where it left the count, it catches up every iteration that it did not do while the route was stopped.

I've read a lot trying to solve that. What I learnt was the bellow:

What happends is called "misfire"
There is a parameter that allows to configure the misfire instructions
According to the Apache Camel documentation, you cannot use trigger.XXX options (that would allow to configure the misfire instructions) if you are using a cron expression.
According to the Apache Camel documentation, the misfire will only be recorded if quartz is in clustered mode.
You can configure the quartz properties to disable the clustered mode (I don't need it).

What I tried without luck:

Created a quartz property file with org.quartz.jobStore.isClustered: false. I am not sure if it was picked up though (put it in src/resources and created a bean that points to it). It did not solve the issue.
Tried to set the misfireInstruction as a trigger option in the route quartz2://TestCron?trigger.misfireInstruction=2&cron=0/1 * * * * ?"

I am completely out of options :x Would appreciate any help :)

score 0 · Answer 1 · answered May 23 '18 at 09:32

I was not able to find a way to modify the misfire instructions but I found a workaround.

Instead of stopping the route with context.stopRoute(routeId), I am now stopping the endpoint :

public static void stopRoute(Exchange exchange) throws Exception {

    String beanId = (String) exchange.getIn().getHeader("beanId");
    String routeId = (String) exchange.getIn().getHeader("routeId");

    SpringCamelContext context = (SpringCamelContext) exchange.getContext().getRegistry().lookupByName(beanId);

    for (Route route : context.getRoutes()) {
        if (route.getId().equals(routeId)) {
            route.getEndpoint().stop();
        }
    }

}

Apache Camel quartz2 cron misfire

1 Answers1