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MethodInvokingJobDetailFactoryBean (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.scheduling.quartz
Class MethodInvokingJobDetailFactoryBean

java.lang.Object
  org.springframework.util.MethodInvoker
      org.springframework.beans.support.ArgumentConvertingMethodInvoker
          org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean

All Implemented Interfaces:

BeanClassLoaderAware, BeanFactoryAware, BeanNameAware, FactoryBean, InitializingBean

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public class MethodInvokingJobDetailFactoryBean
extends ArgumentConvertingMethodInvoker
implements FactoryBean, BeanNameAware, BeanClassLoaderAware, BeanFactoryAware, InitializingBean

FactoryBean that exposes a JobDetail object which delegates job execution to a specified (static or non-static) method. Avoids the need for implementing a one-line Quartz Job that just invokes an existing service method on a Spring-managed target bean.

Inherits common configuration properties from the MethodInvoker base class, such as "targetObject" and "targetMethod", adding support for lookup of the target bean by name through the "targetBeanName" property (as alternative to specifying a "targetObject" directly, allowing for non-singleton target objects).

Supports both concurrently running jobs and non-currently running jobs through the "concurrent" property. Jobs created by this MethodInvokingJobDetailFactoryBean are by default volatile and durable (according to Quartz terminology).

NOTE: JobDetails created via this FactoryBean are not serializable and thus not suitable for persistent job stores. You need to implement your own Quartz Job as a thin wrapper for each case where you want a persistent job to delegate to a specific service method.

Since:

18.02.2004

Author:

Juergen Hoeller, Alef Arendsen

See Also:

setTargetBeanName(java.lang.String), MethodInvoker.setTargetObject(java.lang.Object), MethodInvoker.setTargetMethod(java.lang.String), setConcurrent(boolean)

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Nested Class Summary
static class	MethodInvokingJobDetailFactoryBean.MethodInvokingJob           Quartz Job implementation that invokes a specified method.
static class	MethodInvokingJobDetailFactoryBean.StatefulMethodInvokingJob           Extension of the MethodInvokingJob, implementing the StatefulJob interface.

 

Constructor Summary
MethodInvokingJobDetailFactoryBean()

 

Method Summary
void	afterPropertiesSet()           Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
Object	getObject()           Return an instance (possibly shared or independent) of the object managed by this factory.
Class	getObjectType()           Return the type of object that this FactoryBean creates, or null if not known in advance.
Class	getTargetClass()           Overridden to support the "targetBeanName" feature.
Object	getTargetObject()           Overridden to support the "targetBeanName" feature.
boolean	isSingleton()           Is the object managed by this factory a singleton?
protected  void	postProcessJobDetail(JobDetail jobDetail)           Callback for post-processing the JobDetail to be exposed by this FactoryBean.
protected  Class	resolveClassName(String className)           Resolve the given class name into a Class.
void	setBeanClassLoader(ClassLoader classLoader)           Callback that supplies the bean class loader to a bean instance.
void	setBeanFactory(BeanFactory beanFactory)           Callback that supplies the owning factory to a bean instance.
void	setBeanName(String beanName)           Set the name of the bean in the bean factory that created this bean.
void	setConcurrent(boolean concurrent)           Specify whether or not multiple jobs should be run in a concurrent fashion.
void	setGroup(String group)           Set the group of the job.
void	setJobListenerNames(String[] names)           Set a list of JobListener names for this job, referring to non-global JobListeners registered with the Scheduler.
void	setName(String name)           Set the name of the job.
void	setTargetBeanName(String targetBeanName)           Set the name of the target bean in the Spring BeanFactory.

 

Methods inherited from class org.springframework.beans.support.ArgumentConvertingMethodInvoker
findMatchingMethod, getDefaultTypeConverter, getTypeConverter, registerCustomEditor, setTypeConverter

 

Methods inherited from class org.springframework.util.MethodInvoker
getArguments, getPreparedMethod, getTargetMethod, invoke, isPrepared, prepare, setArguments, setStaticMethod, setTargetClass, setTargetMethod, setTargetObject

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

MethodInvokingJobDetailFactoryBean

public MethodInvokingJobDetailFactoryBean()

Method Detail

setName

public void setName(String name)

Set the name of the job.

Default is the bean name of this FactoryBean.

See Also:

JobDetail.setName(java.lang.String)

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setGroup

public void setGroup(String group)

Set the group of the job.

Default is the default group of the Scheduler.

See Also:

JobDetail.setGroup(java.lang.String), Scheduler.DEFAULT_GROUP

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setConcurrent

public void setConcurrent(boolean concurrent)

Specify whether or not multiple jobs should be run in a concurrent fashion. The behavior when one does not want concurrent jobs to be executed is realized through adding the StatefulJob interface. More information on stateful versus stateless jobs can be found here.

The default setting is to run jobs concurrently.

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setTargetBeanName

public void setTargetBeanName(String targetBeanName)

Set the name of the target bean in the Spring BeanFactory.

This is an alternative to specifying "targetObject", allowing for non-singleton beans to be invoked. Note that specified "targetObject" and "targetClass" values will override the corresponding effect of this "targetBeanName" setting (i.e. statically pre-define the bean type or even the bean object).

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setJobListenerNames

public void setJobListenerNames(String[] names)

Set a list of JobListener names for this job, referring to non-global JobListeners registered with the Scheduler.

A JobListener name always refers to the name returned by the JobListener implementation.

See Also:

SchedulerFactoryBean.setJobListeners(org.quartz.JobListener[]), JobListener.getName()

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setBeanName

public void setBeanName(String beanName)

Description copied from interface: BeanNameAware

Set the name of the bean in the bean factory that created this bean.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method.

Specified by:

setBeanName in interface BeanNameAware

Parameters:

beanName - the name of the bean in the factory. Note that this name is the actual bean name used in the factory, which may differ from the originally specified name: in particular for inner bean names, the actual bean name might have been made unique through appending "#..." suffixes. Use the BeanFactoryUtils.originalBeanName(String) method to extract the original bean name (without suffix), if desired.

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setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

Description copied from interface: BeanClassLoaderAware

Callback that supplies the bean class loader to a bean instance.

Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean's InitializingBean.afterPropertiesSet() method or a custom init-method.

Specified by:

setBeanClassLoader in interface BeanClassLoaderAware

Parameters:

classLoader - the owning class loader; may be null in which case a default ClassLoader must be used, for example the ClassLoader obtained via ClassUtils.getDefaultClassLoader()

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setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)

Description copied from interface: BeanFactoryAware

Callback that supplies the owning factory to a bean instance.

Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean.afterPropertiesSet() or a custom init-method.

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

See Also:

BeanInitializationException

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resolveClassName

protected Class resolveClassName(String className)
                          throws ClassNotFoundException

Description copied from class: MethodInvoker

Resolve the given class name into a Class.

The default implementations uses ClassUtils.forName, using the thread context class loader.

Overrides:

resolveClassName in class MethodInvoker

Parameters:

className - the class name to resolve

Returns:

the resolved Class

Throws:

ClassNotFoundException - if the class name was invalid

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afterPropertiesSet

public void afterPropertiesSet()
                        throws ClassNotFoundException,
                               NoSuchMethodException

Description copied from interface: InitializingBean

Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

ClassNotFoundException

NoSuchMethodException

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postProcessJobDetail

protected void postProcessJobDetail(JobDetail jobDetail)

Callback for post-processing the JobDetail to be exposed by this FactoryBean.

The default implementation is empty. Can be overridden in subclasses.

Parameters:

jobDetail - the JobDetail prepared by this FactoryBean

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getTargetClass

public Class getTargetClass()

Overridden to support the "targetBeanName" feature.

Overrides:

getTargetClass in class MethodInvoker

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getTargetObject

public Object getTargetObject()

Overridden to support the "targetBeanName" feature.

Overrides:

getTargetObject in class MethodInvoker

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getObject

public Object getObject()

Description copied from interface: FactoryBean

Return an instance (possibly shared or independent) of the object managed by this factory.

As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding FactoryBeanNotInitializedException.

As of Spring 2.0, FactoryBeans are allowed to return null objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.

Specified by:

getObject in interface FactoryBean

Returns:

an instance of the bean (can be null)

See Also:

FactoryBeanNotInitializedException

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getObjectType

public Class getObjectType()

Description copied from interface: FactoryBean

Return the type of object that this FactoryBean creates, or null if not known in advance.

This allows one to check for specific types of beans without instantiating objects, for example on autowiring.

In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:

getObjectType in interface FactoryBean

Returns:

the type of object that this FactoryBean creates, or null if not known at the time of the call

See Also:

ListableBeanFactory.getBeansOfType(java.lang.Class)

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isSingleton

public boolean isSingleton()

Description copied from interface: FactoryBean

Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?

NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

Specified by:

isSingleton in interface FactoryBean

Returns:

if the exposed object is a singleton

See Also:

FactoryBean.getObject(), SmartFactoryBean.isPrototype()

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