spring quartz 集群模式

本文是基于quartz-1.6.6版本

当我们用到集群模式部署项目的时候就要考虑到定时任务的集群问题，
这里有四种解决方案：
第一：自己通过代码实现（比如通过不同机器的jvm参数配置或者自己建立任务表去控制执行）
第二：确保一台机器启动quartz
第三：将quartz单独抽取部署单实例
第四：用quartz自身提供的解决方案

本文采用方案四。

quartz集群各节点之间是通过同一个数据库实例的同一套表来感知彼此的。

第一步：创建quartz所需的表：
sql文件位于：quartz-1.6.6\docs\dbTables，选择自己的数据库类型对应的sql文件进行创建。

第二步：配置quartz.properties文件，quartz-1.6.6.zip\src\testrig\quartz.properties是个比较完整的demo文件，可以拿来直接修改，修改过后放到自己项目的类目目录下即可。
这里贴出我的项目的该配置文件，项目用的是oracle数据库、weblogic服务器。具体配置项的不再做过多解释

#============================================================================
# Configure Main Scheduler Properties  
#============================================================================

org.quartz.scheduler.instanceName = KpiScheduler
org.quartz.scheduler.instanceId = AUTO

#============================================================================
# Configure ThreadPool  
#============================================================================

org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 50
#org.quartz.threadPool.threadPriority = 5

#============================================================================
# Configure JobStore  
#============================================================================

org.quartz.jobStore.misfireThreshold = 60000

org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreTX
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PostgreSQLDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.OracleDelegate
org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.WebLogicDelegate
org.quartz.jobStore.useProperties=false
#org.quartz.jobStore.dataSource=dataSource
org.quartz.jobStore.tablePrefix=QRTZ_
#?true????? Scheduler ?????????????
#true为集群模式，集群模式下，此处一定注意配置为true
org.quartz.jobStore.isClustered=true

#============================================================================
# Other Example Delegates
#============================================================================
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.CloudscapeDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DB2v6Delegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DB2v7Delegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DriverDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.HSQLDBDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.MSSQLDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PointbaseDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PostgreSQLDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.WebLogicDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.OracleDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.WebLogicOracleDelegate

#============================================================================
# Configure Datasources  
#============================================================================

#org.quartz.dataSource.myDS.driver = org.postgresql.Driver
#org.quartz.dataSource.myDS.URL = jdbc:postgresql://localhost:5432/postgres
#org.quartz.dataSource.myDS.user = quartz
#org.quartz.dataSource.myDS.password = quartz
#org.quartz.dataSource.myDS.driver = org.postgresql.Driver
#org.quartz.dataSource.myDS.URL = jdbc:postgresql://localhost:5432/postgres
#org.quartz.dataSource.myDS.user = quartz
#org.quartz.dataSource.myDS.password = quartz
#org.quartz.dataSource.myDS.maxConnections = 5
#org.quartz.dataSource.myDS.validationQuery=

#============================================================================
# Configure Plugins 
#============================================================================

#org.quartz.plugin.shutdownHook.class = org.quartz.plugins.management.ShutdownHookPlugin
#org.quartz.plugin.shutdownHook.cleanShutdown = true


#org.quartz.plugin.triggHistory.class = org.quartz.plugins.history.LoggingJobHistoryPlugin

第三步：配置spring的bean

<!-- 由于需要支持集群环境 spring自带的org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean不支持集群，所以用自己写的(后面会贴出org.xxx.xxx.quartz.MethodInvokingJobDetailFactoryBean.java的内容) -->
	<bean id="jobGetLoginMemberNum"
		class="org.xxx.xxx.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="imsService" />
		<property name="targetMethod" value="getLoginMemberNum" />
		<!-- 为 true 当Quartz服务被中止后，再次启动或集群中其他机器接手任务时会尝试恢复执行之前未完成的所有任务 -->
		<property name="shouldRecover" value="false" />
		<!-- 是否允许任务并发执行。当值为false时，表示必须等到前一个线程处理完毕后才再启一个新的线 默认为true -->
		<property name="concurrent" value="true"/>
	</bean>
	<bean id="cronTriggerGetLoginMemberNum"
		class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="jobGetLoginMemberNum" />
		<!-- 每小时第45分钟执行 -->
		<property name="cronExpression">
			<value>0 45 0/1 * * ? *</value>
		</property>
	</bean>

<bean
		class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
		<!-- 集群环境需要数据源 -->
		<property name="dataSource" ref="dataSource"/>
		<!-- 集群环境配置  如果不需要可以给注释了 -->
		<property name="configLocation"	value="classpath:quartz.properties" />
		<!-- 事件触发器 -->
		<property name="triggers">
			<list>
				<ref local="cronTriggerGetLoginMemberNum" /><!-- 登录人数 -->
			</list>
		</property>
		<property name="applicationContextSchedulerContextKey"
			value="applicationContext " />
	</bean>

至此，大功告成！

org.xxx.xxx.quartz.MethodInvokingJobDetailFactoryBean.java

package org.xxx.xxx.quartz;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.Job;
import org.quartz.JobDetail;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.Scheduler;
import org.quartz.StatefulJob;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.MethodInvoker;

/**
 * This is a cluster safe Quartz/Spring FactoryBean implementation, which produces a JobDetail implementation that can invoke any no-arg method on any Class.
 * <p>
 * Use this Class instead of the MethodInvokingJobDetailBeanFactory Class provided by Spring when deploying to a web environment like Tomcat.
 * <p>
 * <b>Implementation</b><br>
 * Instead of associating a MethodInvoker with a JobDetail or a Trigger object, like Spring's MethodInvokingJobDetailFactoryBean does, I made the [Stateful]MethodInvokingJob, which is not persisted in the database, create the MethodInvoker when the [Stateful]MethodInvokingJob is created and executed.
 * <p>
 * A method can be invoked one of several ways:
 * <ul>
 * <li>The name of the Class to invoke (targetClass) and the static method to invoke (targetMethod) can be specified.
 * <li>The Object to invoke (targetObject) and the static or instance method to invoke (targetMethod) can be specified (the targetObject must be Serializable when concurrent=="false").
 * <li>The Class and static Method to invoke can be specified in one property (staticMethod). example: staticMethod = "example.ExampleClass.someStaticMethod"
 * <br><b>Note:</b>  An Object[] of method arguments can be specified (arguments), but the Objects must be Serializable if concurrent=="false".
 * </ul>  
 * <p>
 * I wrote MethodInvokingJobDetailFactoryBean, because Spring's MethodInvokingJobDetailFactoryBean does not produce Serializable
 * JobDetail objects, and as a result cannot be deployed into a clustered environment like Tomcat (as is documented within the Class).
 * <p>
 * <b>Example</b>
 * <code>
 * <ul>
 * 	&lt;bean id="<i>exampleTrigger</i>" class="org.springframework.scheduling.quartz.CronTriggerBean"&gt;
 * <ul>
	<i>&lt;!-- Execute example.ExampleImpl.fooBar() at 2am every day --&gt;</i><br>
	&lt;property name="<a href="http://www.opensymphony.com/quartz/api/org/quartz/CronTrigger.html">cronExpression</a>" value="0 0 2 * * ?" /&gt;<br>
	&lt;property name="jobDetail"&gt;
	<ul>
	&lt;bean class="frameworkx.springframework.scheduling.quartz.<b>MethodInvokingJobDetailFactoryBean</b>"&gt;
	<ul>
	&lt;property name="concurrent" value="<i>false</i>"/&gt;<br>
	&lt;property name="targetClass" value="<i>example.ExampleImpl</i>" /&gt;<br>
	&lt;property name="targetMethod" value="<i>fooBar</i>" /&gt;
	</ul>
	&lt;/bean&gt;
	</ul>
	&lt;/property&gt;
	</ul>
	&lt;/bean&gt;
	<p>
	&lt;bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"&gt;
	<ul>
	&lt;property name="triggers"&gt;
	<ul>
	&lt;list&gt;
	<ul>
	&lt;ref bean="<i>exampleTrigger</i>" /&gt;
	</ul>
	&lt;/list&gt;
	</ul>
	&lt;/property&gt;
	</ul>
	&lt;/bean&gt;
	</ul>
 * </code>
 * In this example we created a MethodInvokingJobDetailFactoryBean, which will produce a JobDetail Object with the jobClass property set to StatefulMethodInvokingJob.class (concurrent=="false"; Set to MethodInvokingJob.class when concurrent=="true"), which will in turn invoke the static <code>fooBar</code>() method of the "<code>example.ExampleImpl</code>" Class. The Scheduler is the heart of the whole operation; without it, nothing will happen.
 * <p>
 * For more information on <code>cronExpression</code> syntax visit <a href="http://www.opensymphony.com/quartz/api/org/quartz/CronTrigger.html">http://www.opensymphony.com/quartz/api/org/quartz/CronTrigger.html</a>
 * 
 * @author Stephen M. Wick
 *
 * @see #afterPropertiesSet()
 */
public class MethodInvokingJobDetailFactoryBean implements FactoryBean, BeanNameAware, InitializingBean
{
	private Log logger = LogFactory.getLog(getClass());

	/**
	 * The JobDetail produced by the <code>afterPropertiesSet</code> method of this Class will be assigned to the Group specified by this property.  Default: Scheduler.DEFAULT_GROUP 
	 * @see #afterPropertiesSet()
	 * @see Scheduler#DEFAULT_GROUP
	 */
	private String group = Scheduler.DEFAULT_GROUP;

	/**
	 * Indicates whether or not the Bean Method should be invoked by more than one Scheduler at the specified time (like when deployed to a cluster, and/or when there are multiple Spring ApplicationContexts in a single JVM<i> - Tomcat 5.5 creates 2 or more instances of the DispatcherServlet (a pool), which in turn creates a separate Spring ApplicationContext for each instance of the servlet</i>) 
	 * <p>
	 * Used by <code>afterPropertiesSet</code> to set the JobDetail.jobClass to MethodInvokingJob.class or StatefulMethodInvokingJob.class when true or false, respectively.  Default: true 
	 * @see #afterPropertiesSet()
	 */
	private boolean concurrent = true;
	
	/** Used to set the JobDetail.durable property.  Default: false
	 * <p>Durability - if a job is non-durable, it is automatically deleted from the scheduler once there are no longer any active triggers associated with it.
	 * @see <a href="http://www.opensymphony.com/quartz/wikidocs/TutorialLesson3.html">http://www.opensymphony.com/quartz/wikidocs/TutorialLesson3.html</a> 
	 * @see #afterPropertiesSet() 
	 */
	private boolean durable = false;
	
	/**
	 * Used by <code>afterPropertiesSet</code> to set the JobDetail.volatile property.  Default: false
	 * <p>Volatility - if a job is volatile, it is not persisted between re-starts of the Quartz scheduler.
	 * <p>I set the default to false to be the same as the default for a Quartz Trigger.  An exception is thrown 
	 * when the Trigger is non-volatile and the Job is volatile.  If you want volatility, then you must set this property, and the Trigger's volatility property, to true.
	 * @see <a href="http://www.opensymphony.com/quartz/wikidocs/TutorialLesson3.html">http://www.opensymphony.com/quartz/wikidocs/TutorialLesson3.html</a>
	 * @see #afterPropertiesSet() 
	 */
	private boolean volatility = false;
	
	/** 
	 * Used by <code>afterPropertiesSet</code> to set the JobDetail.requestsRecovery property.  Default: false<BR>
	 * <p>RequestsRecovery - if a job "requests recovery", and it is executing during the time of a 'hard shutdown' of the scheduler (i.e. the process it is running within crashes, or the machine is shut off), then it is re-executed when the scheduler is started again. In this case, the JobExecutionContext.isRecovering() method will return true. 
	 * @see <a href="http://www.opensymphony.com/quartz/wikidocs/TutorialLesson3.html">http://www.opensymphony.com/quartz/wikidocs/TutorialLesson3.html</a> 
	 * @see #afterPropertiesSet() 
	 */
	private boolean shouldRecover = false;
	
	/**
	 * A list of names of JobListeners to associate with the JobDetail object created by this FactoryBean.
	 *
	 * @see #afterPropertiesSet() 
	 **/
	private String[] jobListenerNames;
	
	/** The name assigned to this bean in the Spring ApplicationContext.
	 * Used by <code>afterPropertiesSet</code> to set the JobDetail.name property.
	 * @see afterPropertiesSet()
	 * @see JobDetail#setName(String)
	 **/
	private String beanName;
	
	/**
	 * The JobDetail produced by the <code>afterPropertiesSet</code> method, and returned by the <code>getObject</code> method of the Spring FactoryBean interface.
	 * @see #afterPropertiesSet()
	 * @see #getObject()
	 * @see FactoryBean
	 **/
	private JobDetail jobDetail;
	
	/**
	 * The name of the Class to invoke.
	 **/
	private String targetClass;

	/**
	 * The Object to invoke.
	 * <p>
	 * {@link #targetClass} or targetObject must be set, but not both.
	 * <p>
	 * This object must be Serializable when {@link #concurrent} is set to false.
	 */
	private Object targetObject;
	
	/**
	 * The instance method to invoke on the Class or Object identified by the targetClass or targetObject property, respectfully.
	 * <p>
	 * targetMethod or {@link #staticMethod} should be set, but not both. 
	 **/
	private String targetMethod;
	
	/**
	 * The static method to invoke on the Class or Object identified by the targetClass or targetObject property, respectfully.
	 * <p>
	 * {@link #targetMethod} or staticMethod should be set, but not both. 
	 */
	private String staticMethod;

	/**
	 * Method arguments provided to the {@link #targetMethod} or {@link #staticMethod} specified.
	 * <p>
	 * All arguments must be Serializable when {@link #concurrent} is set to false.
	 * <p>
	 * I strongly urge you not to provide arguments until Quartz 1.6.1 has been released if you are using a JDBCJobStore with
	 * Microsoft SQL Server. There is a bug in version 1.6.0 that prevents Quartz from Serializing the Objects in the JobDataMap
	 * to the database.  The workaround is to set the property "org.opensymphony.quaryz.useProperties = true" in your quartz.properties file,
	 * which tells Quartz not to serialize Objects in the JobDataMap, but to instead expect all String compliant values.
	 */
	private Object[] arguments;

	/**
	 * Get the targetClass property.
	 * @see #targetClass
	 * @return targetClass
	 */
	public String getTargetClass()
	{
		return targetClass;
	}

	/**
	 * Set the targetClass property.
	 * @see #targetClass
	 */
	public void setTargetClass(String targetClass)
	{
		this.targetClass = targetClass;
	}

	/**
	 * Get the targetMethod property.
	 * @see #targetMethod
	 * @return targetMethod
	 */
	public String getTargetMethod()
	{
		return targetMethod;
	}

	/**
	 * Set the targetMethod property.
	 * @see #targetMethod
	 */
	public void setTargetMethod(String targetMethod)
	{
		this.targetMethod = targetMethod;
	}

	/**
	 * @return jobDetail - The JobDetail that is created by the afterPropertiesSet method of this FactoryBean
	 * @see #jobDetail
	 * @see #afterPropertiesSet()
	 * @see FactoryBean#getObject()
	 */
	public Object getObject() throws Exception
	{
		return jobDetail;
	}

	/**
	 * @return JobDetail.class
	 * @see FactoryBean#getObjectType()
	 */
	public Class getObjectType()
	{
		return JobDetail.class;
	}

	/**
	 * @return true
	 * @see FactoryBean#isSingleton()
	 */
	public boolean isSingleton()
	{
		return true;
	}

	/**
	 * Set the beanName property.
	 * @see #beanName
	 * @see BeanNameAware#setBeanName(String)
	 */
	public void setBeanName(String beanName)
	{
		this.beanName = beanName;
	}

	/**
	 * Invoked by the Spring container after all properties have been set.
	 * <p>
	 * Sets the <code>jobDetail</code> property to a new instance of JobDetail
	 * <ul>
	 * <li>jobDetail.name is set to <code>beanName</code><br>
	 * <li>jobDetail.group is set to <code>group</code><br>
	 * <li>jobDetail.jobClass is set to MethodInvokingJob.class or StatefulMethodInvokingJob.class depending on whether the <code>concurrent</code> property is set to true or false, respectively.<br>
	 * <li>jobDetail.durability is set to <code>durable</code>
	 * <li>jobDetail.volatility is set to <code>volatility</code>
	 * <li>jobDetail.requestsRecovery is set to <code>shouldRecover</code>
	 * <li>jobDetail.jobDataMap["targetClass"] is set to <code>targetClass</code>
	 * <li>jobDetail.jobDataMap["targetMethod"] is set to <code>targetMethod</code>
	 * <li>Each JobListener name in <code>jobListenerNames</code> is added to the <code>jobDetail</code> object.
	 * </ul>
	 * <p>
	 * Logging occurs at the DEBUG and INFO levels; 4 lines at the DEBUG level, and 1 line at the INFO level.
	 * <ul>
	 * <li>DEBUG: start
	 * <li>DEBUG: Creating JobDetail <code>{beanName}</code>
	 * <li>DEBUG: Registering JobListener names with JobDetail object <code>{beanName}</code>
	 * <li>INFO: Created JobDetail: <code>{jobDetail}</code>; targetClass: <code>{targetClass}</code>; targetMethod: <code>{targetMethod}</code>;
	 * <li>DEBUG: end
	 * </ul>
	 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
	 * @see JobDetail
	 * @see #jobDetail
	 * @see #beanName
	 * @see #group
	 * @see MethodInvokingJob
	 * @see StatefulMethodInvokingJob
	 * @see #durable
	 * @see #volatility
	 * @see #shouldRecover
	 * @see #targetClass
	 * @see #targetMethod
	 * @see #jobListenerNames 
	 */
	public void afterPropertiesSet() throws Exception
	{
		try
		{
			logger.debug("start");
			
			logger.debug("Creating JobDetail "+beanName);
			jobDetail = new JobDetail();
			jobDetail.setName(beanName);
			jobDetail.setGroup(group);
			jobDetail.setJobClass(concurrent ? MethodInvokingJob.class : StatefulMethodInvokingJob.class);
			jobDetail.setDurability(durable);
			jobDetail.setVolatility(volatility);
			jobDetail.setRequestsRecovery(shouldRecover);
			if(targetClass!=null)
				jobDetail.getJobDataMap().put("targetClass", targetClass);
			if(targetObject!=null)
				jobDetail.getJobDataMap().put("targetObject", targetObject);
			if(targetMethod!=null)
				jobDetail.getJobDataMap().put("targetMethod", targetMethod);
			if(staticMethod!=null)
				jobDetail.getJobDataMap().put("staticMethod", staticMethod);
			if(arguments!=null)
				jobDetail.getJobDataMap().put("arguments", arguments);
			
			logger.debug("Registering JobListener names with JobDetail object "+beanName);
			if (this.jobListenerNames != null) {
				for (int i = 0; i < this.jobListenerNames.length; i++) {
					this.jobDetail.addJobListener(this.jobListenerNames[i]);
				}
			}
			logger.info("Created JobDetail: "+jobDetail+"; targetClass: "+targetClass+"; targetObject: "+targetObject+"; targetMethod: "+targetMethod+"; staticMethod: "+staticMethod+"; arguments: "+arguments+";");
		}
		finally
		{
			logger.debug("end");
		}
	}

	/**
	 * Setter for the concurrent property.
	 * 
	 * @param concurrent
	 * @see #concurrent
	 */
	public void setConcurrent(boolean concurrent)
	{
		this.concurrent = concurrent;
	}

	/**
	 * setter for the durable property.
	 * 
	 * @param durable
	 * 
	 * @see #durable
	 */
	public void setDurable(boolean durable)
	{
		this.durable = durable;
	}

	/**
	 * setter for the group property.
	 * 
	 * @param group
	 * 
	 * @see #group
	 */
	public void setGroup(String group)
	{
		this.group = group;
	}

	/**
	 * setter for the {@link #jobListenerNames} property.
	 * 
	 * @param jobListenerNames
	 * @see #jobListenerNames
	 */
	public void setJobListenerNames(String[] jobListenerNames)
	{
		this.jobListenerNames = jobListenerNames;
	}

	/**
	 * setter for the {@link #shouldRecover} property.
	 * 
	 * @param shouldRecover
	 * @see #shouldRecover
	 */
	public void setShouldRecover(boolean shouldRecover)
	{
		this.shouldRecover = shouldRecover;
	}

	/**
	 * setter for the {@link #volatility} property.
	 * 
	 * @param volatility
	 * @see #volatility
	 */
	public void setVolatility(boolean volatility)
	{
		this.volatility = volatility;
	}

	/**
	 * This is a cluster safe Job designed to invoke a method on any bean defined within the same Spring
	 * ApplicationContext.
	 * <p>
	 * The only entries this Job expects in the JobDataMap are "targetClass" and "targetMethod".<br>
	 * - It uses the value of the <code>targetClass</code> entry to get the desired bean from the Spring ApplicationContext.<br>
	 * - It uses the value of the <code>targetMethod</code> entry to determine which method of the Bean (identified by targetClass) to invoke.
	 * <p>
	 * It uses the static ApplicationContext in the MethodInvokingJobDetailFactoryBean,
	 * which is ApplicationContextAware, to get the Bean with which to invoke the method.
	 * <p>
	 * All Exceptions thrown from the execute method are caught and wrapped in a JobExecutionException.
	 * 
	 * @see MethodInvokingJobDetailFactoryBean#applicationContext
	 * @see #execute(JobExecutionContext)
	 * 
	 * @author Stephen M. Wick
	 */
	public static class MethodInvokingJob implements Job
	{
		protected Log logger = LogFactory.getLog(getClass());
		
		/**
		 * When invoked by a Quartz scheduler, <code>execute</code> invokes a method on a Class or Object in the JobExecutionContext provided.
		 * <p>
		 * <b>Implementation</b><br>
		 * The Class is identified by the "targetClass" entry in the JobDataMap of the JobExecutionContext provided.  If targetClass is specified, then targetMethod must be a static method.<br>
		 * The Object is identified by the 'targetObject" entry in the JobDataMap of the JobExecutionContext provided.  If targetObject is provided, then targetClass will be overwritten.  This Object must be Serializable when <code>concurrent</code> is set to false.<br>
		 * The method is identified by the "targetMethod" entry in the JobDataMap of the JobExecutionContext provided.<br>
		 * The "staticMethod" entry in the JobDataMap of the JobExecutionContext can be used to specify a Class and Method in one entry (ie: "example.ExampleClass.someStaticMethod")<br>
		 * The method arguments (an array of Objects) are identified by the "arguments" entry in the JobDataMap of the JobExecutionContext.  All arguments must be Serializable when <code>concurrent</code> is set to false.
		 * <p>
		 * Logging is provided at the DEBUG and INFO levels; 8 lines at the DEBUG level, and 1 line at the INFO level.
		 * @see Job#execute(JobExecutionContext)
		 */
		public void execute(JobExecutionContext context) throws JobExecutionException
		{
			try
			{
				logger.debug("start");
				String targetClass = context.getMergedJobDataMap().getString("targetClass");
				logger.debug("targetClass is "+targetClass);
				Class targetClassClass = null;
				if(targetClass!=null)
				{
					targetClassClass = Class.forName(targetClass); // Could throw ClassNotFoundException
				}
				Object targetObject = context.getMergedJobDataMap().get("targetObject");
				logger.debug("targetObject is "+targetObject);
				String targetMethod = context.getMergedJobDataMap().getString("targetMethod");
				logger.debug("targetMethod is "+targetMethod);
				String staticMethod = context.getMergedJobDataMap().getString("staticMethod");
				logger.debug("staticMethod is "+staticMethod);
				Object[] arguments = (Object[])context.getMergedJobDataMap().get("arguments");
				logger.debug("arguments are "+arguments);
				
				logger.debug("creating MethodInvoker");
				MethodInvoker methodInvoker = new MethodInvoker();
				methodInvoker.setTargetClass(targetClassClass);
				methodInvoker.setTargetObject(targetObject);
				methodInvoker.setTargetMethod(targetMethod);
				methodInvoker.setStaticMethod(staticMethod);
				methodInvoker.setArguments(arguments);
				methodInvoker.prepare();
				logger.info("Invoking: "+methodInvoker.getPreparedMethod().toGenericString());
				methodInvoker.invoke();
			}
			catch(Exception e)
			{
				throw new JobExecutionException(e);
			}
			finally
			{
				logger.debug("end");
			}
		}
	}

	public static class StatefulMethodInvokingJob extends MethodInvokingJob implements StatefulJob
	{
		// No additional functionality; just needs to implement StatefulJob.
	}

	public Object[] getArguments()
	{
		return arguments;
	}

	public void setArguments(Object[] arguments)
	{
		this.arguments = arguments;
	}

	public String getStaticMethod()
	{
		return staticMethod;
	}

	public void setStaticMethod(String staticMethod)
	{
		this.staticMethod = staticMethod;
	}

	public void setTargetObject(Object targetObject)
	{
		this.targetObject = targetObject;
	}
}