https://github.com/spring-projects/spring-framework: Spring Core (Spring IO)
  • Juergen Hoeller 
/*
 * Copyright 2002-2016 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
 *
 *      http://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 Runnable about to be executed. 
Note that such a decorator is not necessarily being applied to the user-supplied Runnable/Callable but rather to the actual execution callback (which may be a wrapper around the user-supplied task). 
The primary use case is to set some execution context around the task's
invocation, or to provide some monitoring/statistics for task execution.

Author:Juergen Hoeller
See Also:
Since:4.3
/**
 * 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.
 *
 * @author Juergen Hoeller
 * @since 4.3
 * @see TaskExecutor#execute(Runnable)
 * @see SimpleAsyncTaskExecutor#setTaskDecorator
 */
@FunctionalInterface
public interface TaskDecorator {

	
Decorate the given Runnable, returning a potentially wrapped Runnable for actual execution. 
Params:
  • runnable – the original Runnable
Returns:the decorated Runnable
/**
	 * Decorate the given {@code Runnable}, returning a potentially wrapped
	 * {@code Runnable} for actual execution.
	 * @param runnable the original {@code Runnable}
	 * @return the decorated {@code Runnable}
	 */
	Runnable decorate(Runnable runnable);

}