ScheduledAnnotationBeanPostProcessor (Spring Framework 4.3.4.RELEASE API)

java.lang.Object
- org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor

All Implemented Interfaces:

EventListener, Aware, BeanFactoryAware, BeanPostProcessor, DestructionAwareBeanPostProcessor, DisposableBean, SmartInitializingSingleton, ApplicationContextAware, ApplicationListener<ContextRefreshedEvent>, EmbeddedValueResolverAware, Ordered
```
public class ScheduledAnnotationBeanPostProcessor
extends Object
implements DestructionAwareBeanPostProcessor, Ordered, EmbeddedValueResolverAware, BeanFactoryAware, ApplicationContextAware, SmartInitializingSingleton, ApplicationListener<ContextRefreshedEvent>, DisposableBean
```
Bean post-processor that registers methods annotated with @Scheduled to be invoked by a TaskScheduler according to the "fixedRate", "fixedDelay", or "cron" expression provided via the annotation.
This post-processor is automatically registered by Spring's <task:annotation-driven> XML element, and also by the @EnableScheduling annotation.
Autodetects any SchedulingConfigurer instances in the container, allowing for customization of the scheduler to be used or for fine-grained control over task registration (e.g. registration of Trigger tasks. See the @EnableScheduling javadocs for complete usage details.

Since:

3.0

Author:

Mark Fisher, Juergen Hoeller, Chris Beams, Elizabeth Chatman

See Also:

Scheduled, EnableScheduling, SchedulingConfigurer, TaskScheduler, ScheduledTaskRegistrar, AsyncAnnotationBeanPostProcessor

Field Summary

Fields
Modifier and Type Field and Description

static String DEFAULT_TASK_SCHEDULER_BEAN_NAME
The default name of the TaskScheduler bean to pick up: "taskScheduler".

protected Log logger
- Fields inherited from interface org.springframework.core.Ordered
  HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Fields
Modifier and Type	Field and Description
`static String`	`DEFAULT_TASK_SCHEDULER_BEAN_NAME` The default name of the `TaskScheduler` bean to pick up: "taskScheduler".
`protected Log`	`logger`

Constructor Summary

Constructors
Constructor and Description

ScheduledAnnotationBeanPostProcessor()

Constructors
Constructor and Description
`ScheduledAnnotationBeanPostProcessor()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`afterSingletonsInstantiated()` Invoked right at the end of the singleton pre-instantiation phase, with a guarantee that all regular singleton beans have been created already.
`void`	`destroy()` Invoked by a BeanFactory on destruction of a singleton.
`int`	`getOrder()` Get the order value of this object.
`void`	`onApplicationEvent(ContextRefreshedEvent event)` Handle an application event.
`Object`	`postProcessAfterInitialization(Object bean, String beanName)` Apply this BeanPostProcessor to the given new bean instance after any bean initialization callbacks (like InitializingBean's `afterPropertiesSet` or a custom init-method).
`void`	`postProcessBeforeDestruction(Object bean, String beanName)` Apply this BeanPostProcessor to the given bean instance before its destruction.
`Object`	`postProcessBeforeInitialization(Object bean, String beanName)` Apply this BeanPostProcessor to the given new bean instance before any bean initialization callbacks (like InitializingBean's `afterPropertiesSet` or a custom init-method).
`protected void`	`processScheduled(Scheduled scheduled, Method method, Object bean)`
`boolean`	`requiresDestruction(Object bean)` Determine whether the given bean instance requires destruction by this post-processor.
`void`	`setApplicationContext(ApplicationContext applicationContext)` Setting an `ApplicationContext` is optional: If set, registered tasks will be activated in the `ContextRefreshedEvent` phase; if not set, it will happen at `afterSingletonsInstantiated()` time.
`void`	`setBeanFactory(BeanFactory beanFactory)` Making a `BeanFactory` available is optional; if not set, `SchedulingConfigurer` beans won't get autodetected and a `scheduler` has to be explicitly configured.
`void`	`setEmbeddedValueResolver(StringValueResolver resolver)` Set the StringValueResolver to use for resolving embedded definition values.
`void`	`setScheduler(Object scheduler)` Set the `TaskScheduler` that will invoke the scheduled methods, or a `ScheduledExecutorService` to be wrapped as a TaskScheduler.

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

- Field Detail
  - DEFAULT_TASK_SCHEDULER_BEAN_NAME
```
public static final String DEFAULT_TASK_SCHEDULER_BEAN_NAME
```
    The default name of the TaskScheduler bean to pick up: "taskScheduler".
    Note that the initial lookup happens by type; this is just the fallback in case of multiple scheduler beans found in the context.
    
    Since:
    
    4.2
    
    See Also:
    
    Constant Field Values
  - logger
```
protected final Log logger
```
- Constructor Detail
  - ScheduledAnnotationBeanPostProcessor
```
public ScheduledAnnotationBeanPostProcessor()
```
- Method Detail
  - getOrder
```
public int getOrder()
```
    Description copied from interface: Ordered
    
    Get the order value of this object.
    Higher values are interpreted as lower priority. As a consequence, the object with the lowest value has the highest priority (somewhat analogous to Servlet load-on-startup values).
    Same order values will result in arbitrary sort positions for the affected objects.
    
    Specified by:
    
    getOrder in interface Ordered
    
    Returns:
    
    the order value
    
    See Also:
    
    Ordered.HIGHEST_PRECEDENCE, Ordered.LOWEST_PRECEDENCE
  - setScheduler
```
public void setScheduler(Object scheduler)
```
    Set the TaskScheduler that will invoke the scheduled methods, or a ScheduledExecutorService to be wrapped as a TaskScheduler.
    If not specified, default scheduler resolution will apply: searching for a unique TaskScheduler bean in the context, or for a TaskScheduler bean named "taskScheduler" otherwise; the same lookup will also be performed for a ScheduledExecutorService bean. If neither of the two is resolvable, a local single-threaded default scheduler will be created within the registrar.
    
    See Also:
    
    DEFAULT_TASK_SCHEDULER_BEAN_NAME
  - setEmbeddedValueResolver
```
public void setEmbeddedValueResolver(StringValueResolver resolver)
```
    Description copied from interface: EmbeddedValueResolverAware
    
    Set the StringValueResolver to use for resolving embedded definition values.
    
    Specified by:
    
    setEmbeddedValueResolver in interface EmbeddedValueResolverAware
  - setBeanFactory
```
public void setBeanFactory(BeanFactory beanFactory)
```
    Making a BeanFactory available is optional; if not set, SchedulingConfigurer beans won't get autodetected and a scheduler has to be explicitly configured.
    
    Specified by:
    
    setBeanFactory in interface BeanFactoryAware
    
    Parameters:
    
    beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.
    
    See Also:
    
    BeanInitializationException
  - setApplicationContext
```
public void setApplicationContext(ApplicationContext applicationContext)
```
    Setting an ApplicationContext is optional: If set, registered tasks will be activated in the ContextRefreshedEvent phase; if not set, it will happen at afterSingletonsInstantiated() time.
    
    Specified by:
    
    setApplicationContext in interface ApplicationContextAware
    
    Parameters:
    
    applicationContext - the ApplicationContext object to be used by this object
    
    See Also:
    
    BeanInitializationException
  - afterSingletonsInstantiated
```
public void afterSingletonsInstantiated()
```
    Description copied from interface: SmartInitializingSingleton
    
    Invoked right at the end of the singleton pre-instantiation phase, with a guarantee that all regular singleton beans have been created already. ListableBeanFactory.getBeansOfType(java.lang.Class<T>) calls within this method won't trigger accidental side effects during bootstrap.
    NOTE: This callback won't be triggered for singleton beans lazily initialized on demand after BeanFactory bootstrap, and not for any other bean scope either. Carefully use it for beans with the intended bootstrap semantics only.
    
    Specified by:
    
    afterSingletonsInstantiated in interface SmartInitializingSingleton
  - onApplicationEvent
```
public void onApplicationEvent(ContextRefreshedEvent event)
```
    Description copied from interface: ApplicationListener
    
    Handle an application event.
    
    Specified by:
    
    onApplicationEvent in interface ApplicationListener<ContextRefreshedEvent>
    
    Parameters:
    
    event - the event to respond to
  - postProcessBeforeInitialization
```
public Object postProcessBeforeInitialization(Object bean,
                                              String beanName)
```
    Description copied from interface: BeanPostProcessor
    
    Apply this BeanPostProcessor to the given new bean instance before any bean initialization callbacks (like InitializingBean's afterPropertiesSet or a custom init-method). The bean will already be populated with property values. The returned bean instance may be a wrapper around the original.
    
    Specified by:
    
    postProcessBeforeInitialization in interface BeanPostProcessor
    
    Parameters:
    
    bean - the new bean instance
    
    beanName - the name of the bean
    
    Returns:
    
    the bean instance to use, either the original or a wrapped one; if null, no subsequent BeanPostProcessors will be invoked
    
    See Also:
    
    InitializingBean.afterPropertiesSet()
  - postProcessAfterInitialization
```
public Object postProcessAfterInitialization(Object bean,
                                             String beanName)
```
    Description copied from interface: BeanPostProcessor
    
    Apply this BeanPostProcessor to the given new bean instance after any bean initialization callbacks (like InitializingBean's afterPropertiesSet or a custom init-method). The bean will already be populated with property values. The returned bean instance may be a wrapper around the original.
    In case of a FactoryBean, this callback will be invoked for both the FactoryBean instance and the objects created by the FactoryBean (as of Spring 2.0). The post-processor can decide whether to apply to either the FactoryBean or created objects or both through corresponding bean instanceof FactoryBean checks.
    This callback will also be invoked after a short-circuiting triggered by a InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation(java.lang.Class<?>, java.lang.String) method, in contrast to all other BeanPostProcessor callbacks.
    
    Specified by:
    
    postProcessAfterInitialization in interface BeanPostProcessor
    
    Parameters:
    
    bean - the new bean instance
    
    beanName - the name of the bean
    
    Returns:
    
    the bean instance to use, either the original or a wrapped one; if null, no subsequent BeanPostProcessors will be invoked
    
    See Also:
    
    InitializingBean.afterPropertiesSet(), FactoryBean
  - processScheduled
```
protected void processScheduled(Scheduled scheduled,
                                Method method,
                                Object bean)
```
  - postProcessBeforeDestruction
```
public void postProcessBeforeDestruction(Object bean,
                                         String beanName)
```
    Description copied from interface: DestructionAwareBeanPostProcessor
    
    Apply this BeanPostProcessor to the given bean instance before its destruction. Can invoke custom destruction callbacks.
    Like DisposableBean's destroy and a custom destroy method, this callback just applies to singleton beans in the factory (including inner beans).
    
    Specified by:
    
    postProcessBeforeDestruction in interface DestructionAwareBeanPostProcessor
    
    Parameters:
    
    bean - the bean instance to be destroyed
    
    beanName - the name of the bean
    
    See Also:
    
    DisposableBean, AbstractBeanDefinition.setDestroyMethodName(java.lang.String)
  - requiresDestruction
```
public boolean requiresDestruction(Object bean)
```
    Description copied from interface: DestructionAwareBeanPostProcessor
    
    Determine whether the given bean instance requires destruction by this post-processor.
    NOTE: Even as a late addition, this method has been introduced on DestructionAwareBeanPostProcessor itself instead of on a SmartDABPP subinterface. This allows existing DestructionAwareBeanPostProcessor implementations to easily provide requiresDestruction logic while retaining compatibility with Spring <4.3, and it is also an easier onramp to declaring requiresDestruction as a Java 8 default method in Spring 5.
    If an implementation of DestructionAwareBeanPostProcessor does not provide a concrete implementation of this method, Spring's invocation mechanism silently assumes a method returning true (the effective default before 4.3, and the to-be-default in the Java 8 method in Spring 5).
    
    Specified by:
    
    requiresDestruction in interface DestructionAwareBeanPostProcessor
    
    Parameters:
    
    bean - the bean instance to check
    
    Returns:
    
    true if DestructionAwareBeanPostProcessor.postProcessBeforeDestruction(java.lang.Object, java.lang.String) is supposed to be called for this bean instance eventually, or false if not needed
  - destroy
```
public void destroy()
```
    Description copied from interface: DisposableBean
    
    Invoked by a BeanFactory on destruction of a singleton.
    
    Specified by:
    
    destroy in interface DisposableBean

Class ScheduledAnnotationBeanPostProcessor

Field Summary

Fields inherited from interface org.springframework.core.Ordered

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_TASK_SCHEDULER_BEAN_NAME

logger

Constructor Detail

ScheduledAnnotationBeanPostProcessor

Method Detail

getOrder

setScheduler

setEmbeddedValueResolver

setBeanFactory

setApplicationContext

afterSingletonsInstantiated

onApplicationEvent

postProcessBeforeInitialization

postProcessAfterInitialization

processScheduled

postProcessBeforeDestruction

requiresDestruction

destroy