| /* |
| * Copyright (C) 2018 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.providers.media; |
| |
| import android.os.SystemClock; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.FutureTask; |
| |
| public class PrioritizedFutureTask<T> extends FutureTask<T> |
| implements Comparable<PrioritizedFutureTask<T>> { |
| static final int PRIORITY_LOW = 20; |
| static final int PRIORITY_NORMAL = 10; |
| static final int PRIORITY_HIGH = 5; |
| static final int PRIORITY_CRITICAL = 0; |
| |
| final long requestTime; |
| final int priority; |
| |
| public PrioritizedFutureTask(Callable<T> callable, int priority) { |
| super(callable); |
| this.requestTime = SystemClock.elapsedRealtime(); |
| this.priority = priority; |
| } |
| |
| @Override |
| public final int compareTo(PrioritizedFutureTask<T> other) { |
| if (this.priority != other.priority) { |
| return this.priority < other.priority ? -1 : 1; |
| } |
| if (this.requestTime != other.requestTime) { |
| return this.requestTime < other.requestTime ? -1 : 1; |
| } |
| return 0; |
| } |
| } |