| /* |
| * Copyright (C) 2021 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 android.server.wm.jetpack.utils; |
| |
| import androidx.annotation.Nullable; |
| |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.Consumer; |
| |
| /** |
| * Consumer that provides a simple way to wait for a specific count of values to be received within |
| * a timeout and then return the last value. |
| */ |
| public class TestValueCountConsumer<T> implements Consumer<T> { |
| |
| private static final long TIMEOUT_MS = 3000; |
| private static final int DEFAULT_COUNT = 1; |
| private int mCount = DEFAULT_COUNT; |
| private LinkedBlockingQueue<T> mLinkedBlockingQueue; |
| private T mLastReportedValue; |
| |
| public TestValueCountConsumer() { |
| mLinkedBlockingQueue = new LinkedBlockingQueue<>(); |
| } |
| |
| @Override |
| public void accept(T value) { |
| // Asynchronously offer value to queue |
| mLinkedBlockingQueue.offer(value); |
| } |
| |
| public void setCount(int count) { |
| mCount = count; |
| } |
| |
| @Nullable |
| public T waitAndGet() throws InterruptedException { |
| T value = null; |
| for (int i = 0; i < mCount; i++) { |
| value = mLinkedBlockingQueue.poll(TIMEOUT_MS, TimeUnit.MILLISECONDS); |
| } |
| mLastReportedValue = value; |
| return value; |
| } |
| |
| @Nullable |
| public T getLastReportedValue() { |
| return mLastReportedValue; |
| } |
| } |