How to get class reference by String name?

Question

I am attempting to make the following method call dynamic:

JobDetail job = newJob(RunMeJob.class)

                  .withIdentity("myJob", "group1")

                  .build();

By doing the following:

private void scheduleJob(final SchedulerJob job, final SchedulerTrigger trigger) {



    final String fullyQualifiedName = "com.crm.scheduler.job.RunMeJob";//"com.crm.scheduler.job" + job.getImplementation();



    Class<?> cls = Class.forName(fullyQualifiedName, false, null);



    JobDetail jobDetail = newJob(cls)

              .withIdentity(job.getExternalReference(), trigger.getExternalReference())

              .build();

}

But I am receiving the following error:

The method newJob(Class< ? extends Job>) in the type JobBuilder is not
applicable for the arguments (Class< capture#3-of ?>)

Here is the

RunMeJob

class:

package com.crm.scheduler.job;



import org.quartz.Job;

import org.quartz.JobExecutionContext;

import org.quartz.JobExecutionException;

import org.springframework.stereotype.Component;



import com.crm.scheduler.task.RunMeTask;



@Component

public class RunMeJob implements Job {



    @Override

    public void execute(JobExecutionContext arg0) throws JobExecutionException {

        new RunMeTask().printMe();

    }

}

How can I dynamically specify the class?

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Answer 1

You have the right idea, basically, but you can't pass any old Class object to the newJob method - it must be a Class instance that represent a Job, and has to be specified as such in its generics:

Class<? extends Job> cls = 
    (Class<Job>) Class.forName(fullyQualifiedName, false, null);

How to get class reference by String name?

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