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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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 com.android.systemui.util.concurrency;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
/**
* A sub-class of {@link Executor} that allows scheduling commands to execute periodically.
*/
public interface RepeatableExecutor extends Executor {
/**
* Execute supplied Runnable on the Executors thread after initial delay, and subsequently with
* the given delay between the termination of one execution and the commencement of the next.
*
* Each invocation of the supplied Runnable will be scheduled after the previous invocation
* completes. For example, if you schedule the Runnable with a 60 second delay, and the Runnable
* itself takes 1 second, the effective delay will be 61 seconds between each invocation.
*
* See {@link java.util.concurrent.ScheduledExecutorService#scheduleRepeatedly(Runnable,
* long, long)}
*
* @return A Runnable that, when run, removes the supplied argument from the Executor queue.
*/
default Runnable executeRepeatedly(Runnable r, long initialDelayMillis, long delayMillis) {
return executeRepeatedly(r, initialDelayMillis, delayMillis, TimeUnit.MILLISECONDS);
}
/**
* Execute supplied Runnable on the Executors thread after initial delay, and subsequently with
* the given delay between the termination of one execution and the commencement of the next..
*
* See {@link java.util.concurrent.ScheduledExecutorService#scheduleRepeatedly(Runnable,
* long, long)}
*
* @return A Runnable that, when run, removes the supplied argument from the Executor queue.
*/
Runnable executeRepeatedly(Runnable r, long initialDelay, long delay, TimeUnit unit);
}
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