| /* |
| * 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.server.appbinding; |
| |
| import android.content.Context; |
| import android.util.KeyValueListParser; |
| import android.util.Slog; |
| |
| import java.io.PrintWriter; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Constants that are configurable via the global settings for {@link AppBindingService}. |
| */ |
| public class AppBindingConstants { |
| private static final String TAG = AppBindingService.TAG; |
| |
| private static final String SERVICE_RECONNECT_BACKOFF_SEC_KEY = |
| "service_reconnect_backoff_sec"; |
| |
| private static final String SERVICE_RECONNECT_BACKOFF_INCREASE_KEY = |
| "service_reconnect_backoff_increase"; |
| |
| private static final String SERVICE_RECONNECT_MAX_BACKOFF_SEC_KEY = |
| "service_reconnect_max_backoff_sec"; |
| |
| private static final String SERVICE_STABLE_CONNECTION_THRESHOLD_SEC_KEY = |
| "service_stable_connection_threshold_sec"; |
| |
| private static final String SMS_SERVICE_ENABLED_KEY = |
| "sms_service_enabled"; |
| |
| private static final String SMS_APP_BIND_FLAGS_KEY = |
| "sms_app_bind_flags"; |
| |
| public final String sourceSettings; |
| |
| /** |
| * The back-off before re-connecting, when a service binding died, due to the app |
| * crashing repeatedly. |
| */ |
| public final long SERVICE_RECONNECT_BACKOFF_SEC; |
| |
| /** |
| * The exponential back-off increase factor when a binding dies multiple times. |
| */ |
| public final double SERVICE_RECONNECT_BACKOFF_INCREASE; |
| |
| /** |
| * The max back-off |
| */ |
| public final long SERVICE_RECONNECT_MAX_BACKOFF_SEC; |
| |
| /** |
| * If a connection lasts more than this duration, we reset the re-connect back-off time. |
| */ |
| public final long SERVICE_STABLE_CONNECTION_THRESHOLD_SEC; |
| |
| /** |
| * Whether to actually bind to the default SMS app service. (Feature flag) |
| */ |
| public final boolean SMS_SERVICE_ENABLED; |
| |
| /** |
| * Extra binding flags for SMS service. |
| */ |
| public final int SMS_APP_BIND_FLAGS; |
| |
| private AppBindingConstants(String settings) { |
| sourceSettings = settings; |
| |
| final KeyValueListParser parser = new KeyValueListParser(','); |
| try { |
| parser.setString(settings); |
| } catch (IllegalArgumentException e) { |
| // Failed to parse the settings string, log this and move on |
| // with defaults. |
| Slog.e(TAG, "Bad setting: " + settings); |
| } |
| |
| long serviceReconnectBackoffSec = parser.getLong( |
| SERVICE_RECONNECT_BACKOFF_SEC_KEY, 10); |
| |
| double serviceReconnectBackoffIncrease = parser.getFloat( |
| SERVICE_RECONNECT_BACKOFF_INCREASE_KEY, 2f); |
| |
| long serviceReconnectMaxBackoffSec = parser.getLong( |
| SERVICE_RECONNECT_MAX_BACKOFF_SEC_KEY, TimeUnit.HOURS.toSeconds(1)); |
| |
| boolean smsServiceEnabled = parser.getBoolean(SMS_SERVICE_ENABLED_KEY, true); |
| |
| int smsAppBindFlags = parser.getInt( |
| SMS_APP_BIND_FLAGS_KEY, |
| Context.BIND_NOT_VISIBLE | Context.BIND_FOREGROUND_SERVICE); |
| |
| long serviceStableConnectionThresholdSec = parser.getLong( |
| SERVICE_STABLE_CONNECTION_THRESHOLD_SEC_KEY, TimeUnit.MINUTES.toSeconds(2)); |
| |
| // Set minimum: 5 seconds. |
| serviceReconnectBackoffSec = Math.max(5, serviceReconnectBackoffSec); |
| |
| // Set minimum: 1.0. |
| serviceReconnectBackoffIncrease = |
| Math.max(1, serviceReconnectBackoffIncrease); |
| |
| // Make sure max >= default back off. |
| serviceReconnectMaxBackoffSec = Math.max(serviceReconnectBackoffSec, |
| serviceReconnectMaxBackoffSec); |
| |
| SERVICE_RECONNECT_BACKOFF_SEC = serviceReconnectBackoffSec; |
| SERVICE_RECONNECT_BACKOFF_INCREASE = serviceReconnectBackoffIncrease; |
| SERVICE_RECONNECT_MAX_BACKOFF_SEC = serviceReconnectMaxBackoffSec; |
| SERVICE_STABLE_CONNECTION_THRESHOLD_SEC = serviceStableConnectionThresholdSec; |
| SMS_SERVICE_ENABLED = smsServiceEnabled; |
| SMS_APP_BIND_FLAGS = smsAppBindFlags; |
| } |
| |
| /** |
| * Create a new instance from a settings string. |
| */ |
| public static AppBindingConstants initializeFromString(String settings) { |
| return new AppBindingConstants(settings); |
| } |
| |
| /** |
| * dumpsys support. |
| */ |
| public void dump(String prefix, PrintWriter pw) { |
| pw.print(prefix); |
| pw.print("Constants: "); |
| pw.println(sourceSettings); |
| |
| pw.print(prefix); |
| pw.print(" SERVICE_RECONNECT_BACKOFF_SEC: "); |
| pw.println(SERVICE_RECONNECT_BACKOFF_SEC); |
| |
| pw.print(prefix); |
| pw.print(" SERVICE_RECONNECT_BACKOFF_INCREASE: "); |
| pw.println(SERVICE_RECONNECT_BACKOFF_INCREASE); |
| |
| pw.print(prefix); |
| pw.print(" SERVICE_RECONNECT_MAX_BACKOFF_SEC: "); |
| pw.println(SERVICE_RECONNECT_MAX_BACKOFF_SEC); |
| |
| pw.print(prefix); |
| pw.print(" SERVICE_STABLE_CONNECTION_THRESHOLD_SEC: "); |
| pw.println(SERVICE_STABLE_CONNECTION_THRESHOLD_SEC); |
| |
| pw.print(prefix); |
| pw.print(" SMS_SERVICE_ENABLED: "); |
| pw.println(SMS_SERVICE_ENABLED); |
| |
| pw.print(prefix); |
| pw.print(" SMS_APP_BIND_FLAGS: 0x"); |
| pw.println(Integer.toHexString(SMS_APP_BIND_FLAGS)); |
| } |
| } |