/*
* 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 java.util.Map;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.PropertyAccessorFactory;
import org.springframework.util.ReflectionUtils;
/**
* Simple implementation of the Quartz Job interface, applying the
* passed-in JobDataMap and also the SchedulerContext as bean property
* values. This is appropriate because a new Job instance will be created
* for each execution. JobDataMap entries will override SchedulerContext
* entries with the same keys.
*
* <p>For example, let's assume that the JobDataMap contains a key
* "myParam" with value "5": The Job implementation can then expose
* a bean property "myParam" of type int to receive such a value,
* i.e. a method "setMyParam(int)". This will also work for complex
* types like business objects etc.
*
* <p>Note: The QuartzJobBean class itself only implements the standard
* Quartz {@link org.quartz.Job} interface. Let your subclass explicitly
* implement the Quartz {@link org.quartz.StatefulJob} interface to
* mark your concrete job bean as stateful.
*
* <p>This version of QuartzJobBean requires Quartz 1.5 or higher,
* due to the support for trigger-specific job data.
*
* <p><b>Note that as of Spring 2.0 and Quartz 1.5, the preferred way
* to apply dependency injection to Job instances is via a JobFactory:</b>
* that is, to specify {@link SpringBeanJobFactory} as Quartz JobFactory
* (typically via
* {@link SchedulerFactoryBean#setJobFactory} SchedulerFactoryBean's "jobFactory" property}).
* This allows to implement dependency-injected Quartz Jobs without
* a dependency on Spring base classes.
*
* @author Juergen Hoeller
* @since 18.02.2004
* @see org.quartz.JobExecutionContext#getMergedJobDataMap()
* @see org.quartz.Scheduler#getContext()
* @see JobDetailBean#setJobDataAsMap
* @see SimpleTriggerBean#setJobDataAsMap
* @see CronTriggerBean#setJobDataAsMap
* @see SchedulerFactoryBean#setSchedulerContextAsMap
* @see SpringBeanJobFactory
* @see SchedulerFactoryBean#setJobFactory
*/
public abstract class QuartzJobBean implements Job {
private static final Method getSchedulerMethod;
private static final Method getMergedJobDataMapMethod;
static {
try {
Class jobExecutionContextClass =
QuartzJobBean.class.getClassLoader().loadClass("org.quartz.JobExecutionContext");
getSchedulerMethod = jobExecutionContextClass.getMethod("getScheduler");
getMergedJobDataMapMethod = jobExecutionContextClass.getMethod("getMergedJobDataMap");
}
catch (Exception ex) {
throw new IllegalStateException("Incompatible Quartz API: " + ex);
}
}
/**
* This implementation applies the passed-in job data map as bean property
* values, and delegates to <code>executeInternal</code> afterwards.
* @see #executeInternal
*/
public final void execute(JobExecutionContext context) throws JobExecutionException {
try {
// Reflectively adapting to differences between Quartz 1.x and Quartz 2.0...
Scheduler scheduler = (Scheduler) ReflectionUtils.invokeMethod(getSchedulerMethod, context);
Map mergedJobDataMap = (Map) ReflectionUtils.invokeMethod(getMergedJobDataMapMethod, context);
BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
MutablePropertyValues pvs = new MutablePropertyValues();
pvs.addPropertyValues(scheduler.getContext());
pvs.addPropertyValues(mergedJobDataMap);
bw.setPropertyValues(pvs, true);
}
catch (SchedulerException ex) {
throw new JobExecutionException(ex);
}
executeInternal(context);
}
/**
* Execute the actual job. The job data map will already have been
* applied as bean property values by execute. The contract is
* exactly the same as for the standard Quartz execute method.
* @see #execute
*/
protected abstract void executeInternal(JobExecutionContext context) throws JobExecutionException;
}