/*
* Copyright 2002-2011 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.scheduling.quartz;
import java.lang.reflect.Method;
import org.quartz.Job;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.spi.JobFactory;
import org.quartz.spi.TriggerFiredBundle;
import org.springframework.util.ReflectionUtils;
/**
* JobFactory implementation that supports {@link java.lang.Runnable}
* objects as well as standard Quartz {@link org.quartz.Job} instances.
*
* <p>Compatible with Quartz 1.5+ as well as Quartz 2.0/2.1, as of Spring 3.1.
*
* @author Juergen Hoeller
* @since 2.0
* @see DelegatingJob
* @see #adaptJob(Object)
*/
public class AdaptableJobFactory implements JobFactory {
/**
* Quartz 2.0 version of newJob: simply delegates to old newJob variant.
* @see #newJob(org.quartz.spi.TriggerFiredBundle)
*/
public Job newJob(TriggerFiredBundle bundle, Scheduler scheduler) throws SchedulerException {
return newJob(bundle);
}
/**
* Quartz 1.x version of newJob: contains actual implementation code.
*/
public Job newJob(TriggerFiredBundle bundle) throws SchedulerException {
try {
Object jobObject = createJobInstance(bundle);
return adaptJob(jobObject);
}
catch (Exception ex) {
throw new SchedulerException("Job instantiation failed", ex);
}
}
/**
* Create an instance of the specified job class.
* <p>Can be overridden to post-process the job instance.
* @param bundle the TriggerFiredBundle from which the JobDetail
* and other info relating to the trigger firing can be obtained
* @return the job instance
* @throws Exception if job instantiation failed
*/
protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
// Reflectively adapting to differences between Quartz 1.x and Quartz 2.0...
Method getJobDetail = bundle.getClass().getMethod("getJobDetail");
Object jobDetail = ReflectionUtils.invokeMethod(getJobDetail, bundle);
Method getJobClass = jobDetail.getClass().getMethod("getJobClass");
Class jobClass = (Class) ReflectionUtils.invokeMethod(getJobClass, jobDetail);
return jobClass.newInstance();
}
/**
* Adapt the given job object to the Quartz Job interface.
* <p>The default implementation supports straight Quartz Jobs
* as well as Runnables, which get wrapped in a DelegatingJob.
* @param jobObject the original instance of the specified job class
* @return the adapted Quartz Job instance
* @throws Exception if the given job could not be adapted
* @see DelegatingJob
*/
protected Job adaptJob(Object jobObject) throws Exception {
if (jobObject instanceof Job) {
return (Job) jobObject;
}
else if (jobObject instanceof Runnable) {
return new DelegatingJob((Runnable) jobObject);
}
else {
throw new IllegalArgumentException("Unable to execute job class [" + jobObject.getClass().getName() +
"]: only [org.quartz.Job] and [java.lang.Runnable] supported.");
}
}
}