| /* |
| * 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); |
| } |