90 lines
2.8 KiB
Java
90 lines
2.8 KiB
Java
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.safetycenter;
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import static android.os.Build.VERSION_CODES.TIRAMISU;
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import android.os.Handler;
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import androidx.annotation.RequiresApi;
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import com.android.permission.util.ForegroundThread;
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import java.io.PrintWriter;
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import java.time.Duration;
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import java.util.ArrayDeque;
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import java.util.Iterator;
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import javax.annotation.concurrent.NotThreadSafe;
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/**
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* A class to track timeouts related to Safety Center.
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*
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* <p>This class isn't thread safe. Thread safety must be handled by the caller.
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*/
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@RequiresApi(TIRAMISU)
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@NotThreadSafe
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final class SafetyCenterTimeouts {
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/**
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* The maximum number of timeouts we are tracking at a given time. This is to avoid having the
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* {@code mTimeouts} queue grow unbounded. In practice, we should never have more than 1 or 2
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* timeouts in flight.
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*/
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private static final int MAX_TRACKED = 10;
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private final ArrayDeque<Runnable> mTimeouts = new ArrayDeque<>(MAX_TRACKED);
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private final Handler mForegroundHandler = ForegroundThread.getHandler();
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SafetyCenterTimeouts() {}
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/** Adds the given {@link Runnable} to run as a timeout after the given {@link Duration}. */
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void add(Runnable timeoutAction, Duration timeoutDuration) {
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if (mTimeouts.size() + 1 >= MAX_TRACKED) {
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remove(mTimeouts.pollFirst());
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}
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mTimeouts.addLast(timeoutAction);
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mForegroundHandler.postDelayed(timeoutAction, timeoutDuration.toMillis());
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}
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/** Removes the given {@link Runnable} to run as a timeout. */
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void remove(Runnable timeoutAction) {
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mTimeouts.remove(timeoutAction);
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mForegroundHandler.removeCallbacks(timeoutAction);
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}
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/** Clears all timeouts. */
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void clear() {
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while (!mTimeouts.isEmpty()) {
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mForegroundHandler.removeCallbacks(mTimeouts.pollFirst());
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}
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}
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/** Dumps state for debugging purposes. */
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void dump(PrintWriter fout) {
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int count = mTimeouts.size();
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fout.println("TIMEOUTS (" + count + ")");
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Iterator<Runnable> it = mTimeouts.iterator();
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int i = 0;
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while (it.hasNext()) {
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fout.println("\t[" + i++ + "] " + it.next());
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}
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fout.println();
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}
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}
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