程序包 cn.taketoday.context.event

类 SimpleApplicationEventMulticaster

java.lang.Object
cn.taketoday.context.event.AbstractApplicationEventMulticaster
cn.taketoday.context.event.SimpleApplicationEventMulticaster
所有已实现的接口:
Aware, BeanClassLoaderAware, BeanFactoryAware, ApplicationEventMulticaster
public class SimpleApplicationEventMulticaster extends AbstractApplicationEventMulticaster
Simple implementation of the ApplicationEventMulticaster interface.

Multicasts all events to all registered listeners, leaving it up to the listeners to ignore events that they are not interested in. Listeners will usually perform corresponding instanceof checks on the passed-in event object.

By default, all listeners are invoked in the calling thread. This allows the danger of a rogue listener blocking the entire application, but adds minimal overhead. Specify an alternative task executor to have listeners executed in different threads, for example from a thread pool.

作者:
Rod Johnson, Juergen Hoeller, Stephane Nicoll, Brian Clozel
另请参阅:

  • 构造器详细资料

    • SimpleApplicationEventMulticaster

      public SimpleApplicationEventMulticaster()
      Create a new SimpleApplicationEventMulticaster.

    • SimpleApplicationEventMulticaster

      public SimpleApplicationEventMulticaster(BeanFactory beanFactory)
      Create a new SimpleApplicationEventMulticaster for the given BeanFactory.

  • 方法详细资料

    • setTaskExecutor

      public void setTaskExecutor(@Nullable Executor taskExecutor)
      Set a custom executor (typically a TaskExecutor) to invoke each listener with.

      Default is equivalent to SyncTaskExecutor, executing all listeners synchronously in the calling thread.

      Consider specifying an asynchronous task executor here to not block the caller until all listeners have been executed. However, note that asynchronous execution will not participate in the caller's thread context (class loader, transaction association) unless the TaskExecutor explicitly supports this.

      另请参阅:
      • SyncTaskExecutor
      • SimpleAsyncTaskExecutor

    • getTaskExecutor

      @Nullable protected Executor getTaskExecutor()
      Return the current task executor for this multicaster.

    • setErrorHandler

      public void setErrorHandler(@Nullable cn.taketoday.util.ErrorHandler errorHandler)
      Set the ErrorHandler to invoke in case an exception is thrown from a listener.

      Default is none, with a listener exception stopping the current multicast and getting propagated to the publisher of the current event. If a task executor is specified, each individual listener exception will get propagated to the executor but won't necessarily stop execution of other listeners.

      Consider setting an ErrorHandler implementation that catches and logs exceptions ( TaskUtils.LOG_AND_SUPPRESS_ERROR_HANDLER) or an implementation that logs exceptions while nevertheless propagating them (e.g. TaskUtils.LOG_AND_PROPAGATE_ERROR_HANDLER).

    • getErrorHandler

      @Nullable protected cn.taketoday.util.ErrorHandler getErrorHandler()
      Return the current error handler for this multicaster.

    • multicastEvent

      public void multicastEvent(ApplicationEvent event)
      从接口复制的说明: ApplicationEventMulticaster
      Multicast the given application event to appropriate listeners.

      Consider using ApplicationEventMulticaster.multicastEvent(ApplicationEvent, ResolvableType) if possible as it provides better support for generics-based events.

      参数:
      event - the event to multicast

    • multicastEvent

      public void multicastEvent(ApplicationEvent event, @Nullable cn.taketoday.core.ResolvableType eventType)
      从接口复制的说明: ApplicationEventMulticaster
      Multicast the given application event to appropriate listeners.

      If the eventType is null, a default type is built based on the event instance.

      参数:
      event - the event to multicast
      eventType - the type of event (can be null)

    • invokeListener

      protected void invokeListener(ApplicationListener<?> listener, ApplicationEvent event)
      Invoke the given listener with the given event.
      参数:
      listener - the ApplicationListener to invoke
      event - the current event to propagate