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// Copyright 2012 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.
#include <stdint.h>
#include <map>
#include <string>
#include <vector>
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "net/base/network_change_notifier.h"
#include "sync/base/sync_export.h"
#include "sync/engine/all_status.h"
#include "sync/engine/net/server_connection_manager.h"
#include "sync/engine/nudge_handler.h"
#include "sync/engine/sync_engine_event_listener.h"
#include "sync/internal_api/change_reorder_buffer.h"
#include "sync/internal_api/debug_info_event_listener.h"
#include "sync/internal_api/js_mutation_event_observer.h"
#include "sync/internal_api/js_sync_encryption_handler_observer.h"
#include "sync/internal_api/js_sync_manager_observer.h"
#include "sync/internal_api/protocol_event_buffer.h"
#include "sync/internal_api/public/sync_context_proxy.h"
#include "sync/internal_api/public/sync_manager.h"
#include "sync/internal_api/public/user_share.h"
#include "sync/internal_api/sync_encryption_handler_impl.h"
#include "sync/js/js_backend.h"
#include "sync/syncable/directory_change_delegate.h"
#include "sync/util/cryptographer.h"
#include "sync/util/time.h"
class GURL;
namespace syncer_v2 {
class SyncContext;
namespace syncer {
class ModelTypeRegistry;
class SyncAPIServerConnectionManager;
class TypeDebugInfoObserver;
class WriteNode;
class WriteTransaction;
namespace sessions {
class SyncSessionContext;
// SyncManager encapsulates syncable::Directory and serves as the parent of all
// other objects in the sync API. If multiple threads interact with the same
// local sync repository (i.e. the same sqlite database), they should share a
// single SyncManager instance. The caller should typically create one
// SyncManager for the lifetime of a user session.
// Unless stated otherwise, all methods of SyncManager should be called on the
// same thread.
class SYNC_EXPORT SyncManagerImpl
: public SyncManager,
public net::NetworkChangeNotifier::IPAddressObserver,
public net::NetworkChangeNotifier::ConnectionTypeObserver,
public JsBackend,
public SyncEngineEventListener,
public ServerConnectionEventListener,
public syncable::DirectoryChangeDelegate,
public SyncEncryptionHandler::Observer,
public NudgeHandler {
// Create an uninitialized SyncManager. Callers must Init() before using.
explicit SyncManagerImpl(const std::string& name);
~SyncManagerImpl() override;
// SyncManager implementation.
void Init(InitArgs* args) override;
ModelTypeSet InitialSyncEndedTypes() override;
ModelTypeSet GetTypesWithEmptyProgressMarkerToken(
ModelTypeSet types) override;
bool PurgePartiallySyncedTypes() override;
void UpdateCredentials(const SyncCredentials& credentials) override;
void StartSyncingNormally(const ModelSafeRoutingInfo& routing_info,
base::Time last_poll_time) override;
void ConfigureSyncer(ConfigureReason reason,
ModelTypeSet to_download,
ModelTypeSet to_purge,
ModelTypeSet to_journal,
ModelTypeSet to_unapply,
const ModelSafeRoutingInfo& new_routing_info,
const base::Closure& ready_task,
const base::Closure& retry_task) override;
void SetInvalidatorEnabled(bool invalidator_enabled) override;
void OnIncomingInvalidation(
syncer::ModelType type,
scoped_ptr<InvalidationInterface> invalidation) override;
void AddObserver(SyncManager::Observer* observer) override;
void RemoveObserver(SyncManager::Observer* observer) override;
SyncStatus GetDetailedStatus() const override;
void SaveChanges() override;
void ShutdownOnSyncThread(ShutdownReason reason) override;
UserShare* GetUserShare() override;
syncer_v2::SyncContextProxy* GetSyncContextProxy() override;
const std::string cache_guid() override;
bool ReceivedExperiment(Experiments* experiments) override;
bool HasUnsyncedItems() override;
SyncEncryptionHandler* GetEncryptionHandler() override;
ScopedVector<syncer::ProtocolEvent> GetBufferedProtocolEvents() override;
scoped_ptr<base::ListValue> GetAllNodesForType(
syncer::ModelType type) override;
void RegisterDirectoryTypeDebugInfoObserver(
syncer::TypeDebugInfoObserver* observer) override;
void UnregisterDirectoryTypeDebugInfoObserver(
syncer::TypeDebugInfoObserver* observer) override;
bool HasDirectoryTypeDebugInfoObserver(
syncer::TypeDebugInfoObserver* observer) override;
void RequestEmitDebugInfo() override;
void ClearServerData(const ClearServerDataCallback& callback) override;
// SyncEncryptionHandler::Observer implementation.
void OnPassphraseRequired(
PassphraseRequiredReason reason,
const sync_pb::EncryptedData& pending_keys) override;
void OnPassphraseAccepted() override;
void OnBootstrapTokenUpdated(const std::string& bootstrap_token,
BootstrapTokenType type) override;
void OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
bool encrypt_everything) override;
void OnEncryptionComplete() override;
void OnCryptographerStateChanged(Cryptographer* cryptographer) override;
void OnPassphraseTypeChanged(PassphraseType type,
base::Time explicit_passphrase_time) override;
void OnLocalSetPassphraseEncryption(
const SyncEncryptionHandler::NigoriState& nigori_state) override;
// SyncEngineEventListener implementation.
void OnSyncCycleEvent(const SyncCycleEvent& event) override;
void OnActionableError(const SyncProtocolError& error) override;
void OnRetryTimeChanged(base::Time retry_time) override;
void OnThrottledTypesChanged(ModelTypeSet throttled_types) override;
void OnMigrationRequested(ModelTypeSet types) override;
void OnProtocolEvent(const ProtocolEvent& event) override;
// ServerConnectionEventListener implementation.
void OnServerConnectionEvent(const ServerConnectionEvent& event) override;
// JsBackend implementation.
void SetJsEventHandler(
const WeakHandle<JsEventHandler>& event_handler) override;
// DirectoryChangeDelegate implementation.
// This listener is called upon completion of a syncable transaction, and
// builds the list of sync-engine initiated changes that will be forwarded to
// the SyncManager's Observers.
void HandleTransactionCompleteChangeEvent(
ModelTypeSet models_with_changes) override;
ModelTypeSet HandleTransactionEndingChangeEvent(
const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
syncable::BaseTransaction* trans) override;
void HandleCalculateChangesChangeEventFromSyncApi(
const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
syncable::BaseTransaction* trans,
std::vector<int64_t>* entries_changed) override;
void HandleCalculateChangesChangeEventFromSyncer(
const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
syncable::BaseTransaction* trans,
std::vector<int64_t>* entries_changed) override;
// Handle explicit requests to fetch updates for the given types.
void RefreshTypes(ModelTypeSet types) override;
// These OnYYYChanged() methods are only called by our NetworkChangeNotifier.
// Called when IP address of primary interface changes.
void OnIPAddressChanged() override;
// Called when the connection type of the system has changed.
void OnConnectionTypeChanged(
net::NetworkChangeNotifier::ConnectionType) override;
// NudgeHandler implementation.
void NudgeForInitialDownload(syncer::ModelType type) override;
void NudgeForCommit(syncer::ModelType type) override;
void NudgeForRefresh(syncer::ModelType type) override;
const SyncScheduler* scheduler() const;
bool GetHasInvalidAuthTokenForTest() const;
// Helper functions. Virtual for testing.
virtual void NotifyInitializationSuccess();
virtual void NotifyInitializationFailure();
friend class SyncManagerTest;
FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, NudgeDelayTest);
FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, PurgeDisabledTypes);
FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, PurgeUnappliedTypes);
struct NotificationInfo {
int total_count;
std::string payload;
// Returned pointer owned by the caller.
base::DictionaryValue* ToValue() const;
base::TimeDelta GetNudgeDelayTimeDelta(const ModelType& model_type);
typedef std::map<ModelType, NotificationInfo> NotificationInfoMap;
// Determine if the parents or predecessors differ between the old and new
// versions of an entry. Note that a node's index may change without its
// UNIQUE_POSITION changing if its sibling nodes were changed. To handle such
// cases, we rely on the caller to treat a position update on any sibling as
// updating the positions of all siblings.
bool VisiblePositionsDiffer(
const syncable::EntryKernelMutation& mutation) const;
// Determine if any of the fields made visible to clients of the Sync API
// differ between the versions of an entry stored in |a| and |b|. A return
// value of false means that it should be OK to ignore this change.
bool VisiblePropertiesDiffer(
const syncable::EntryKernelMutation& mutation,
Cryptographer* cryptographer) const;
// Open the directory named with |username|.
bool OpenDirectory(const std::string& username);
// Purge those disabled types as specified by |to_purge|. |to_journal| and
// |to_unapply| specify subsets that require special handling. |to_journal|
// types are saved into the delete journal, while |to_unapply| have only
// their local data deleted, while their server data is preserved.
bool PurgeDisabledTypes(ModelTypeSet to_purge,
ModelTypeSet to_journal,
ModelTypeSet to_unapply);
void RequestNudgeForDataTypes(
const tracked_objects::Location& nudge_location,
ModelTypeSet type);
// If this is a deletion for a password, sets the legacy
// ExtraPasswordChangeRecordData field of |buffer|. Otherwise sets
// |buffer|'s specifics field to contain the unencrypted data.
void SetExtraChangeRecordData(int64_t id,
ModelType type,
ChangeReorderBuffer* buffer,
Cryptographer* cryptographer,
const syncable::EntryKernel& original,
bool existed_before,
bool exists_now);
// Checks for server reachabilty and requests a nudge.
void OnNetworkConnectivityChangedImpl();
syncable::Directory* directory();
base::FilePath database_path_;
const std::string name_;
base::ThreadChecker thread_checker_;
// Thread-safe handle used by
// HandleCalculateChangesChangeEventFromSyncApi(), which can be
// called from any thread. Valid only between between calls to
// Init() and Shutdown().
// TODO(akalin): Ideally, we wouldn't need to store this; instead,
// we'd have another worker class which implements
// HandleCalculateChangesChangeEventFromSyncApi() and we'd pass it a
// WeakHandle when we construct it.
WeakHandle<SyncManagerImpl> weak_handle_this_;
// We give a handle to share_ to clients of the API for use when constructing
// any transaction type.
UserShare share_;
// This can be called from any thread, but only between calls to
// OpenDirectory() and ShutdownOnSyncThread().
WeakHandle<SyncManager::ChangeObserver> change_observer_;
base::ObserverList<SyncManager::Observer> observers_;
// The ServerConnectionManager used to abstract communication between the
// client (the Syncer) and the sync server.
scoped_ptr<SyncAPIServerConnectionManager> connection_manager_;
// Maintains state that affects the way we interact with different sync types.
// This state changes when entering or exiting a configuration cycle.
scoped_ptr<ModelTypeRegistry> model_type_registry_;
// The main interface for non-blocking sync types and a thread-safe wrapper.
scoped_ptr<syncer_v2::SyncContext> sync_context_;
scoped_ptr<syncer_v2::SyncContextProxy> sync_context_proxy_;
// A container of various bits of information used by the SyncScheduler to
// create SyncSessions. Must outlive the SyncScheduler.
scoped_ptr<sessions::SyncSessionContext> session_context_;
// The scheduler that runs the Syncer. Needs to be explicitly
// Start()ed.
scoped_ptr<SyncScheduler> scheduler_;
// A multi-purpose status watch object that aggregates stats from various
// sync components.
AllStatus allstatus_;
// Each element of this map is a store of change records produced by
// HandleChangeEventFromSyncer during the CALCULATE_CHANGES step. The changes
// are grouped by model type, and are stored here in tree order to be
// forwarded to the observer slightly later, at the TRANSACTION_ENDING step
// by HandleTransactionEndingChangeEvent. The list is cleared after observer
// finishes processing.
typedef std::map<int, ImmutableChangeRecordList> ChangeRecordMap;
ChangeRecordMap change_records_;
SyncManager::ChangeDelegate* change_delegate_;
// Set to true once Init has been called.
bool initialized_;
bool observing_network_connectivity_changes_;
// Map used to store the notification info to be displayed in
// about:sync page.
NotificationInfoMap notification_info_map_;
// These are for interacting with chrome://sync-internals.
JsSyncManagerObserver js_sync_manager_observer_;
JsMutationEventObserver js_mutation_event_observer_;
JsSyncEncryptionHandlerObserver js_sync_encryption_handler_observer_;
// This is for keeping track of client events to send to the server.
DebugInfoEventListener debug_info_event_listener_;
ProtocolEventBuffer protocol_event_buffer_;
base::Closure report_unrecoverable_error_function_;
// Sync's encryption handler. It tracks the set of encrypted types, manages
// changing passphrases, and in general handles sync-specific interactions
// with the cryptographer.
scoped_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
base::WeakPtrFactory<SyncManagerImpl> weak_ptr_factory_;
} // namespace syncer