org.springframework.scheduling.support

Class TaskUtils

java.lang.Object

org.springframework.scheduling.support.TaskUtils

public abstract class TaskUtils
extends java.lang.Object

Utility methods for decorating tasks with error handling.

NOTE: This class is intended for internal use by Spring's scheduler implementations. It is only public so that it may be accessed from impl classes within other packages. It is not intended for general use.

Since:

3.0

Author:

Mark Fisher, Juergen Hoeller

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	TaskUtils.LoggingErrorHandler An ErrorHandler implementation that logs the Throwable at error level.
private static class	TaskUtils.PropagatingErrorHandler An ErrorHandler implementation that logs the Throwable at error level and then propagates it.

Field Summary

Fields

Modifier and Type	Field and Description
static ErrorHandler	LOG_AND_PROPAGATE_ERROR_HANDLER An ErrorHandler strategy that will log at error level and then re-throw the Exception.
static ErrorHandler	LOG_AND_SUPPRESS_ERROR_HANDLER An ErrorHandler strategy that will log the Exception but perform no further handling.

Constructor Summary

Constructors

Constructor and Description
TaskUtils()

Method Summary

Modifier and Type	Method and Description
static DelegatingErrorHandlingRunnable	decorateTaskWithErrorHandler(java.lang.Runnable task, ErrorHandler errorHandler, boolean isRepeatingTask) Decorate the task for error handling.
static ErrorHandler	getDefaultErrorHandler(boolean isRepeatingTask) Return the default ErrorHandler implementation based on the boolean value indicating whether the task will be repeating or not.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG_AND_SUPPRESS_ERROR_HANDLER

public static final ErrorHandler LOG_AND_SUPPRESS_ERROR_HANDLER

An ErrorHandler strategy that will log the Exception but perform no further handling. This will suppress the error so that subsequent executions of the task will not be prevented.

LOG_AND_PROPAGATE_ERROR_HANDLER

public static final ErrorHandler LOG_AND_PROPAGATE_ERROR_HANDLER

An ErrorHandler strategy that will log at error level and then re-throw the Exception. Note: this will typically prevent subsequent execution of a scheduled task.

Constructor Detail

TaskUtils

public TaskUtils()

Method Detail

decorateTaskWithErrorHandler

public static DelegatingErrorHandlingRunnable decorateTaskWithErrorHandler(java.lang.Runnable task,
                                                                           ErrorHandler errorHandler,
                                                                           boolean isRepeatingTask)

Decorate the task for error handling. If the provided ErrorHandler is not null, it will be used. Otherwise, repeating tasks will have errors suppressed by default whereas one-shot tasks will have errors propagated by default since those errors may be expected through the returned Future. In both cases, the errors will be logged.

getDefaultErrorHandler

public static ErrorHandler getDefaultErrorHandler(boolean isRepeatingTask)

Return the default ErrorHandler implementation based on the boolean value indicating whether the task will be repeating or not. For repeating tasks it will suppress errors, but for one-time tasks it will propagate. In both cases, the error will be logged.