| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.chrome.browser.invalidation; |
| |
| import android.accounts.Account; |
| import android.content.Context; |
| import android.content.Intent; |
| |
| import org.chromium.base.ApplicationState; |
| import org.chromium.base.ApplicationStatus; |
| import org.chromium.base.VisibleForTesting; |
| import org.chromium.components.invalidation.InvalidationClientService; |
| import org.chromium.sync.internal_api.pub.base.ModelType; |
| import org.chromium.sync.notifier.InvalidationIntentProtocol; |
| import org.chromium.sync.notifier.InvalidationPreferences; |
| import org.chromium.sync.notifier.SyncStatusHelper; |
| |
| import java.util.Set; |
| |
| /** |
| * Controller used to send start, stop, and registration-change commands to the invalidation |
| * client library used by Sync. |
| */ |
| public class InvalidationController implements ApplicationStatus.ApplicationStateListener { |
| private static final Object LOCK = new Object(); |
| |
| private static InvalidationController sInstance; |
| |
| private final Context mContext; |
| |
| /** |
| * Sets the types for which the client should register for notifications. |
| * |
| * @param account Account of the user. |
| * @param allTypes If {@code true}, registers for all types, and {@code types} is ignored |
| * @param types Set of types for which to register. Ignored if {@code allTypes == true}. |
| */ |
| public void setRegisteredTypes(Account account, boolean allTypes, Set<ModelType> types) { |
| Intent registerIntent = |
| InvalidationIntentProtocol.createRegisterIntent(account, allTypes, types); |
| registerIntent.setClass(mContext, InvalidationClientService.class); |
| mContext.startService(registerIntent); |
| } |
| |
| /** |
| * Reads all stored preferences and calls |
| * {@link #setRegisteredTypes(android.accounts.Account, boolean, java.util.Set)} with the stored |
| * values, refreshing the set of types with {@code types}. It can be used on startup of Chrome |
| * to ensure we always have a set of registrations consistent with the native code. |
| * @param types Set of types for which to register. |
| */ |
| public void refreshRegisteredTypes(Set<ModelType> types) { |
| InvalidationPreferences invalidationPreferences = new InvalidationPreferences(mContext); |
| Set<String> savedSyncedTypes = invalidationPreferences.getSavedSyncedTypes(); |
| Account account = invalidationPreferences.getSavedSyncedAccount(); |
| boolean allTypes = savedSyncedTypes != null && |
| savedSyncedTypes.contains(ModelType.ALL_TYPES_TYPE); |
| setRegisteredTypes(account, allTypes, types); |
| } |
| |
| /** |
| * Starts the invalidation client. |
| */ |
| public void start() { |
| Intent intent = new Intent(mContext, InvalidationClientService.class); |
| mContext.startService(intent); |
| } |
| |
| /** |
| * Stops the invalidation client. |
| */ |
| public void stop() { |
| Intent intent = new Intent(mContext, InvalidationClientService.class); |
| intent.putExtra(InvalidationIntentProtocol.EXTRA_STOP, true); |
| mContext.startService(intent); |
| } |
| |
| /** |
| * Returns the instance that will use {@code context} to issue intents. |
| * |
| * Calling this method will create the instance if it does not yet exist. |
| */ |
| public static InvalidationController get(Context context) { |
| synchronized (LOCK) { |
| if (sInstance == null) { |
| sInstance = new InvalidationController(context); |
| } |
| return sInstance; |
| } |
| } |
| |
| /** |
| * Creates an instance using {@code context} to send intents. |
| */ |
| @VisibleForTesting |
| InvalidationController(Context context) { |
| Context appContext = context.getApplicationContext(); |
| if (appContext == null) throw new NullPointerException("Unable to get application context"); |
| mContext = appContext; |
| ApplicationStatus.registerApplicationStateListener(this); |
| } |
| |
| @Override |
| public void onApplicationStateChange(int newState) { |
| if (SyncStatusHelper.get(mContext).isSyncEnabled()) { |
| if (newState == ApplicationState.HAS_RUNNING_ACTIVITIES) { |
| start(); |
| } else if (newState == ApplicationState.HAS_PAUSED_ACTIVITIES) { |
| stop(); |
| } |
| } |
| } |
| } |