spring TaskDecorator 源码
spring TaskDecorator 代码
文件路径：/spring-core/src/main/java/org/springframework/core/task/TaskDecorator.java
/*
* Copyright 2002-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.core.task;
/**
* A callback interface for a decorator to be applied to any {@link Runnable}
* about to be executed.
*
* <p>Note that such a decorator is not necessarily being applied to the
* user-supplied {@code Runnable}/{@code Callable} but rather to the actual
* execution callback (which may be a wrapper around the user-supplied task).
*
* <p>The primary use case is to set some execution context around the task's
* invocation, or to provide some monitoring/statistics for task execution.
*
* <p><b>NOTE:</b> Exception handling in {@code TaskDecorator} implementations
* may be limited. Specifically in case of a {@code Future}-based operation,
* the exposed {@code Runnable} will be a wrapper which does not propagate
* any exceptions from its {@code run} method.
*
* @author Juergen Hoeller
* @since 4.3
* @see TaskExecutor#execute(Runnable)
* @see SimpleAsyncTaskExecutor#setTaskDecorator
* @see org.springframework.core.task.support.TaskExecutorAdapter#setTaskDecorator
*/
@FunctionalInterface
public interface TaskDecorator {
/**
* Decorate the given {@code Runnable}, returning a potentially wrapped
* {@code Runnable} for actual execution, internally delegating to the
* original {@link Runnable#run()} implementation.
* @param runnable the original {@code Runnable}
* @return the decorated {@code Runnable}
*/
Runnable decorate(Runnable runnable);
}
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