| // Copyright (c) 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.sync.notifier; |
| |
| import android.accounts.Account; |
| import android.content.Context; |
| import android.content.Intent; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Lists; |
| |
| import org.chromium.base.ActivityStatus; |
| import org.chromium.sync.internal_api.pub.base.ModelType; |
| |
| 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 ActivityStatus.StateListener { |
| /** |
| * Constants and utility methods to create the intents used to communicate between the |
| * controller and the invalidation client library. |
| */ |
| public static class IntentProtocol { |
| /** |
| * Action set on register intents. |
| */ |
| public static final String ACTION_REGISTER = |
| "org.chromium.sync.notifier.ACTION_REGISTER_TYPES"; |
| |
| /** |
| * Parcelable-valued intent extra containing the account of the user. |
| */ |
| public static final String EXTRA_ACCOUNT = "account"; |
| |
| /** |
| * String-list-valued intent extra of the syncable types to sync. |
| */ |
| public static final String EXTRA_REGISTERED_TYPES = "registered_types"; |
| |
| /** |
| * Boolean-valued intent extra indicating that the service should be stopped. |
| */ |
| public static final String EXTRA_STOP = "stop"; |
| |
| /** |
| * Create an Intent that will start the invalidation listener service and |
| * register for the specified types. |
| */ |
| public static Intent createRegisterIntent(Account account, |
| boolean allTypes, Set<ModelType> types) { |
| Intent registerIntent = new Intent(ACTION_REGISTER); |
| String[] selectedTypesArray; |
| if (allTypes) { |
| selectedTypesArray = new String[]{ModelType.ALL_TYPES_TYPE}; |
| } else { |
| selectedTypesArray = new String[types.size()]; |
| int pos = 0; |
| for (ModelType type : types) { |
| selectedTypesArray[pos++] = type.name(); |
| } |
| } |
| registerIntent.putStringArrayListExtra(EXTRA_REGISTERED_TYPES, |
| Lists.newArrayList(selectedTypesArray)); |
| registerIntent.putExtra(EXTRA_ACCOUNT, account); |
| return registerIntent; |
| } |
| |
| /** Returns whether {@code intent} is a stop intent. */ |
| public static boolean isStop(Intent intent) { |
| return intent.getBooleanExtra(EXTRA_STOP, false); |
| } |
| |
| /** Returns whether {@code intent} is a registered types change intent. */ |
| public static boolean isRegisteredTypesChange(Intent intent) { |
| return intent.hasExtra(EXTRA_REGISTERED_TYPES); |
| } |
| |
| private IntentProtocol() { |
| // Disallow instantiation. |
| } |
| } |
| |
| 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 = IntentProtocol.createRegisterIntent(account, allTypes, types); |
| registerIntent.setClass(mContext, InvalidationService.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, InvalidationService.class); |
| mContext.startService(intent); |
| } |
| |
| /** |
| * Stops the invalidation client. |
| */ |
| public void stop() { |
| Intent intent = new Intent(mContext, InvalidationService.class); |
| intent.putExtra(IntentProtocol.EXTRA_STOP, true); |
| mContext.startService(intent); |
| } |
| |
| /** |
| * Returns the contract authority to use when requesting sync. |
| */ |
| public String getContractAuthority() { |
| return mContext.getPackageName(); |
| } |
| |
| /** |
| * 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) { |
| mContext = Preconditions.checkNotNull(context.getApplicationContext()); |
| ActivityStatus.registerStateListener(this); |
| } |
| |
| @Override |
| public void onActivityStateChange(int newState) { |
| if (SyncStatusHelper.get(mContext).isSyncEnabled()) { |
| if (newState == ActivityStatus.PAUSED) { |
| stop(); |
| } else if (newState == ActivityStatus.RESUMED) { |
| start(); |
| } |
| } |
| } |
| } |