1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.app.sdksandbox.testutils; 18 19 import android.annotation.NonNull; 20 import android.provider.DeviceConfig; 21 22 import java.util.concurrent.CountDownLatch; 23 24 /** Utility to ensure that DeviceConfig property is updated */ 25 public class ConfigListener implements DeviceConfig.OnPropertiesChangedListener { 26 private CountDownLatch mLatch; 27 private String mPropertyName; 28 setLatchForProperty(CountDownLatch countDownLatch, String propertyName)29 public void setLatchForProperty(CountDownLatch countDownLatch, String propertyName) { 30 mLatch = countDownLatch; 31 mPropertyName = propertyName; 32 } 33 34 @Override onPropertiesChanged(@onNull DeviceConfig.Properties properties)35 public void onPropertiesChanged(@NonNull DeviceConfig.Properties properties) { 36 if (mLatch != null && properties.getKeyset().contains(mPropertyName)) { 37 mLatch.countDown(); 38 } 39 } 40 } 41