public class

TimerFactoryBean

extends Object
implements BeanNameAware DisposableBean FactoryBean<T> InitializingBean
java.lang.Object
   ↳ org.springframework.scheduling.timer.TimerFactoryBean

This class is deprecated.
as of Spring 3.0, in favor of the scheduling.concurrent package which is based on Java 5's java.util.concurrent.ExecutorService

Class Overview

FactoryBean that sets up a java.util.Timer and exposes it for bean references.

Allows for registration of ScheduledTimerTasks, automatically starting the Timer on initialization and cancelling it on destruction of the context. In scenarios that just require static registration of tasks at startup, there is no need to access the Timer instance itself in application code at all.

Note that the Timer mechanism uses a TimerTask instance that is shared between repeated executions, in contrast to Quartz which creates a new Job instance for each execution.

See Also

Summary

Fields
protected final Log logger
Public Constructors
TimerFactoryBean()
Public Methods
void afterPropertiesSet()
Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
void destroy()
Cancel the Timer on bean factory shutdown, stopping all scheduled tasks.
Timer getObject()
Return an instance (possibly shared or independent) of the object managed by this factory.
Class<? extends Timer> getObjectType()
Return the type of object that this FactoryBean creates, or null if not known in advance.
boolean isSingleton()
Is the object managed by this factory a singleton? That is, will 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.

void setBeanName(String beanName)
Set the name of the bean in the bean factory that created this bean.
void setDaemon(boolean daemon)
Set whether the timer should use a daemon thread, just executing as long as the application itself is running.
void setScheduledTimerTasks(ScheduledTimerTask[] scheduledTimerTasks)
Register a list of ScheduledTimerTask objects with the Timer that this FactoryBean creates.
Protected Methods
Timer createTimer(String name, boolean daemon)
Create a new Timer instance.
void registerTasks(ScheduledTimerTask[] tasks, Timer timer)
Register the specified ScheduledTimerTasks on the given Timer.
[Expand]
Inherited Methods
From class java.lang.Object
From interface org.springframework.beans.factory.BeanNameAware
From interface org.springframework.beans.factory.DisposableBean
From interface org.springframework.beans.factory.FactoryBean
From interface org.springframework.beans.factory.InitializingBean

Fields

protected final Log logger

Public Constructors

public TimerFactoryBean ()

Public Methods

public void afterPropertiesSet ()

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.

public void destroy ()

Cancel the Timer on bean factory shutdown, stopping all scheduled tasks.

See Also

public Timer getObject ()

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.

Returns
  • an instance of the bean (can be null)

public Class<? extends Timer> getObjectType ()

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.

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

public boolean isSingleton ()

Is the object managed by this factory a singleton? That is, will 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 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.

Returns
  • whether the exposed object is a singleton

public void setBeanName (String beanName)

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 afterPropertiesSet() or a custom init-method.

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.

public void setDaemon (boolean daemon)

Set whether the timer should use a daemon thread, just executing as long as the application itself is running.

Default is "false": The timer will automatically get cancelled on destruction of this FactoryBean. Hence, if the application shuts down, tasks will by default finish their execution. Specify "true" for eager shutdown of threads that execute tasks.

See Also

public void setScheduledTimerTasks (ScheduledTimerTask[] scheduledTimerTasks)

Register a list of ScheduledTimerTask objects with the Timer that this FactoryBean creates. Depending on each SchedulerTimerTask's settings, it will be registered via one of Timer's schedule methods.

See Also

Protected Methods

protected Timer createTimer (String name, boolean daemon)

Create a new Timer instance. Called by afterPropertiesSet. Can be overridden in subclasses to provide custom Timer subclasses.

Parameters
name the desired name of the Timer's associated thread
daemon whether to create a Timer that runs as daemon thread
Returns
  • a new Timer instance
See Also

protected void registerTasks (ScheduledTimerTask[] tasks, Timer timer)

Register the specified ScheduledTimerTasks on the given Timer.

Parameters
tasks the specified ScheduledTimerTasks (never empty)
timer the Timer to register the tasks on.