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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.
#ifndef COMPONENTS_SYNC_ENGINE_ENGINE_COMPONENTS_FACTORY_H_
#define COMPONENTS_SYNC_ENGINE_ENGINE_COMPONENTS_FACTORY_H_
#include <memory>
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "components/sync/engine/model_safe_worker.h"
namespace syncer {
class CancelationSignal;
class DebugInfoGetter;
class ExtensionsActivity;
class ModelTypeRegistry;
class ServerConnectionManager;
class SyncCycleContext;
class SyncEngineEventListener;
class SyncScheduler;
namespace syncable {
class Directory;
class DirectoryBackingStore;
}
// EngineComponentsFactory exists so that tests can override creation of
// components used by the SyncManager and other things inside engine/.
class EngineComponentsFactory {
public:
enum EncryptionMethod {
ENCRYPTION_LEGACY,
// Option to enable support for keystore key based encryption.
ENCRYPTION_KEYSTORE
};
enum BackoffOverride {
BACKOFF_NORMAL,
// Use this value for integration testing to avoid long delays /
// timing out tests. Uses kInitialBackoffShortRetrySeconds (see
// polling_constants.h) for all initial retries.
BACKOFF_SHORT_INITIAL_RETRY_OVERRIDE
};
enum PreCommitUpdatesPolicy {
// By default, the server will enable or disable this experiment through the
// sync protocol's experiments data type.
SERVER_CONTROLLED_PRE_COMMIT_UPDATE_AVOIANCE,
// This flag overrides the server's decision and enables the pre-commit
// update avoidance experiment.
FORCE_ENABLE_PRE_COMMIT_UPDATE_AVOIDANCE,
};
enum class NudgeDelay {
DEFAULT_NUDGE_DELAY,
SHORT_NUDGE_DELAY,
};
// Configuration options for internal components. This struct is expected
// to grow and shrink over time with transient features / experiments,
// roughly following command line flags in chrome. Implementations of
// EngineComponentsFactory can use this information to build components
// with appropriate bells and whistles.
struct Switches {
EncryptionMethod encryption_method;
BackoffOverride backoff_override;
NudgeDelay nudge_delay;
PreCommitUpdatesPolicy pre_commit_updates_policy;
};
// For selecting the types of storage to use to persist sync data when
// BuildDirectoryBackingStore() is called.
enum StorageOption {
// BuildDirectoryBackingStore should not use persistent on-disk storage.
STORAGE_IN_MEMORY,
// Use this if you want BuildDirectoryBackingStore to create/use a real
// on disk store.
STORAGE_ON_DISK,
// Use this to test the case where a directory fails to load.
STORAGE_INVALID
};
virtual ~EngineComponentsFactory() {}
virtual std::unique_ptr<SyncScheduler> BuildScheduler(
const std::string& name,
SyncCycleContext* context,
CancelationSignal* cancelation_signal,
bool ignore_auth_credentials) = 0;
virtual std::unique_ptr<SyncCycleContext> BuildContext(
ServerConnectionManager* connection_manager,
syncable::Directory* directory,
ExtensionsActivity* extensions_activity,
const std::vector<SyncEngineEventListener*>& listeners,
DebugInfoGetter* debug_info_getter,
ModelTypeRegistry* model_type_registry,
const std::string& invalidator_client_id) = 0;
virtual std::unique_ptr<syncable::DirectoryBackingStore>
BuildDirectoryBackingStore(StorageOption storage,
const std::string& dir_name,
const base::FilePath& backing_filepath) = 0;
// Returns the Switches struct that this object is using as configuration, if
// the implementation is making use of one.
virtual Switches GetSwitches() const = 0;
};
} // namespace syncer
#endif // COMPONENTS_SYNC_ENGINE_ENGINE_COMPONENTS_FACTORY_H_
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