mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-02 15:15:23 +00:00
310 lines
8.8 KiB
C++
310 lines
8.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_places_Database_h_
|
|
#define mozilla_places_Database_h_
|
|
|
|
#include "MainThreadUtils.h"
|
|
#include "nsWeakReference.h"
|
|
#include "nsIInterfaceRequestorUtils.h"
|
|
#include "nsIObserver.h"
|
|
#include "mozilla/storage.h"
|
|
#include "mozilla/storage/StatementCache.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsIEventTarget.h"
|
|
|
|
// This is the schema version. Update it at any schema change and add a
|
|
// corresponding migrateVxx method below.
|
|
#define DATABASE_SCHEMA_VERSION 24
|
|
|
|
// Fired after Places inited.
|
|
#define TOPIC_PLACES_INIT_COMPLETE "places-init-complete"
|
|
// Fired when initialization fails due to a locked database.
|
|
#define TOPIC_DATABASE_LOCKED "places-database-locked"
|
|
// This topic is received when the profile is about to be lost. Places does
|
|
// initial shutdown work and notifies TOPIC_PLACES_SHUTDOWN to all listeners.
|
|
// Any shutdown work that requires the Places APIs should happen here.
|
|
#define TOPIC_PROFILE_CHANGE_TEARDOWN "profile-change-teardown"
|
|
// This topic is received just before the profile is lost. Places begins
|
|
// shutting down the connection and notifies TOPIC_PLACES_WILL_CLOSE_CONNECTION
|
|
// to all listeners. Only critical database cleanups should happen here,
|
|
// some APIs may bail out already.
|
|
#define TOPIC_PROFILE_BEFORE_CHANGE "profile-before-change"
|
|
// Fired when Places is shutting down. Any code should stop accessing Places
|
|
// APIs after this notification. If you need to listen for Places shutdown
|
|
// you should only use this notification, next ones are intended only for
|
|
// internal Places use.
|
|
#define TOPIC_PLACES_SHUTDOWN "places-shutdown"
|
|
// For Internal use only. Fired when connection is about to be closed, only
|
|
// cleanup tasks should run at this stage, nothing should be added to the
|
|
// database, nor APIs should be called.
|
|
#define TOPIC_PLACES_WILL_CLOSE_CONNECTION "places-will-close-connection"
|
|
// Fired when the connection has gone, nothing will work from now on.
|
|
#define TOPIC_PLACES_CONNECTION_CLOSED "places-connection-closed"
|
|
|
|
class nsIStringBundle;
|
|
class nsIRunnable;
|
|
|
|
namespace mozilla {
|
|
namespace places {
|
|
|
|
enum JournalMode {
|
|
// Default SQLite journal mode.
|
|
JOURNAL_DELETE = 0
|
|
// Can reduce fsyncs on Linux when journal is deleted (See bug 460315).
|
|
// We fallback to this mode when WAL is unavailable.
|
|
, JOURNAL_TRUNCATE
|
|
// Unsafe in case of crashes on database swap or low memory.
|
|
, JOURNAL_MEMORY
|
|
// Can reduce number of fsyncs. We try to use this mode by default.
|
|
, JOURNAL_WAL
|
|
};
|
|
|
|
class Database MOZ_FINAL : public nsIObserver
|
|
, public nsSupportsWeakReference
|
|
{
|
|
typedef mozilla::storage::StatementCache<mozIStorageStatement> StatementCache;
|
|
typedef mozilla::storage::StatementCache<mozIStorageAsyncStatement> AsyncStatementCache;
|
|
|
|
public:
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
NS_DECL_NSIOBSERVER
|
|
|
|
Database();
|
|
|
|
/**
|
|
* Initializes the database connection and the schema.
|
|
* In case of corruption the database is copied to a backup file and replaced.
|
|
*/
|
|
nsresult Init();
|
|
|
|
/**
|
|
* Finalizes the cached statements and closes the database connection.
|
|
* A TOPIC_PLACES_CONNECTION_CLOSED notification is fired when done.
|
|
*/
|
|
void Shutdown();
|
|
|
|
/**
|
|
* Getter to use when instantiating the class.
|
|
*
|
|
* @return Singleton instance of this class.
|
|
*/
|
|
static already_AddRefed<Database> GetDatabase()
|
|
{
|
|
return GetSingleton();
|
|
}
|
|
|
|
/**
|
|
* Returns last known database status.
|
|
*
|
|
* @return one of the nsINavHistoryService::DATABASE_STATUS_* constants.
|
|
*/
|
|
uint16_t GetDatabaseStatus() const
|
|
{
|
|
return mDatabaseStatus;
|
|
}
|
|
|
|
/**
|
|
* Returns a pointer to the storage connection.
|
|
*
|
|
* @return The connection handle.
|
|
*/
|
|
mozIStorageConnection* MainConn() const
|
|
{
|
|
return mMainConn;
|
|
}
|
|
|
|
/**
|
|
* Dispatches a runnable to the connection async thread, to be serialized
|
|
* with async statements.
|
|
*
|
|
* @param aEvent
|
|
* The runnable to be dispatched.
|
|
*/
|
|
void DispatchToAsyncThread(nsIRunnable* aEvent) const
|
|
{
|
|
if (mClosed) {
|
|
return;
|
|
}
|
|
nsCOMPtr<nsIEventTarget> target = do_GetInterface(mMainConn);
|
|
if (target) {
|
|
(void)target->Dispatch(aEvent, NS_DISPATCH_NORMAL);
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//// Statements Getters.
|
|
|
|
/**
|
|
* Gets a cached synchronous statement.
|
|
*
|
|
* @param aQuery
|
|
* SQL query literal.
|
|
* @return The cached statement.
|
|
* @note Always null check the result.
|
|
* @note Always use a scoper to reset the statement.
|
|
*/
|
|
template<int N>
|
|
already_AddRefed<mozIStorageStatement>
|
|
GetStatement(const char (&aQuery)[N]) const
|
|
{
|
|
nsDependentCString query(aQuery, N - 1);
|
|
return GetStatement(query);
|
|
}
|
|
|
|
/**
|
|
* Gets a cached synchronous statement.
|
|
*
|
|
* @param aQuery
|
|
* nsCString of SQL query.
|
|
* @return The cached statement.
|
|
* @note Always null check the result.
|
|
* @note Always use a scoper to reset the statement.
|
|
*/
|
|
already_AddRefed<mozIStorageStatement>
|
|
GetStatement(const nsACString& aQuery) const
|
|
{
|
|
if (mShuttingDown) {
|
|
return nullptr;
|
|
}
|
|
if (NS_IsMainThread()) {
|
|
return mMainThreadStatements.GetCachedStatement(aQuery);
|
|
}
|
|
return mAsyncThreadStatements.GetCachedStatement(aQuery);
|
|
}
|
|
|
|
/**
|
|
* Gets a cached asynchronous statement.
|
|
*
|
|
* @param aQuery
|
|
* SQL query literal.
|
|
* @return The cached statement.
|
|
* @note Always null check the result.
|
|
* @note AsyncStatements are automatically reset on execution.
|
|
*/
|
|
template<int N>
|
|
already_AddRefed<mozIStorageAsyncStatement>
|
|
GetAsyncStatement(const char (&aQuery)[N]) const
|
|
{
|
|
nsDependentCString query(aQuery, N - 1);
|
|
return GetAsyncStatement(query);
|
|
}
|
|
|
|
/**
|
|
* Gets a cached asynchronous statement.
|
|
*
|
|
* @param aQuery
|
|
* nsCString of SQL query.
|
|
* @return The cached statement.
|
|
* @note Always null check the result.
|
|
* @note AsyncStatements are automatically reset on execution.
|
|
*/
|
|
already_AddRefed<mozIStorageAsyncStatement>
|
|
GetAsyncStatement(const nsACString& aQuery) const
|
|
{
|
|
if (mShuttingDown) {
|
|
return nullptr;
|
|
}
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
return mMainThreadAsyncStatements.GetCachedStatement(aQuery);
|
|
}
|
|
|
|
protected:
|
|
/**
|
|
* Initializes the database file. If the database does not exist or is
|
|
* corrupt, a new one is created. In case of corruption it also creates a
|
|
* backup copy of the database.
|
|
*
|
|
* @param aStorage
|
|
* mozStorage service instance.
|
|
* @param aNewDatabaseCreated
|
|
* whether a new database file has been created.
|
|
*/
|
|
nsresult InitDatabaseFile(nsCOMPtr<mozIStorageService>& aStorage,
|
|
bool* aNewDatabaseCreated);
|
|
|
|
/**
|
|
* Creates a database backup and replaces the original file with a new
|
|
* one.
|
|
*
|
|
* @param aStorage
|
|
* mozStorage service instance.
|
|
*/
|
|
nsresult BackupAndReplaceDatabaseFile(nsCOMPtr<mozIStorageService>& aStorage);
|
|
|
|
/**
|
|
* Initializes the database. This performs any necessary migrations for the
|
|
* database. All migration is done inside a transaction that is rolled back
|
|
* if any error occurs.
|
|
* @param aDatabaseMigrated
|
|
* Whether a schema upgrade happened.
|
|
*/
|
|
nsresult InitSchema(bool* aDatabaseMigrated);
|
|
|
|
/**
|
|
* Creates bookmark roots in a new DB.
|
|
*/
|
|
nsresult CreateBookmarkRoots();
|
|
|
|
/**
|
|
* Initializes additionale SQLite functions, defined in SQLFunctions.h
|
|
*/
|
|
nsresult InitFunctions();
|
|
|
|
/**
|
|
* Initializes triggers defined in nsPlacesTriggers.h
|
|
*/
|
|
nsresult InitTempTriggers();
|
|
|
|
/**
|
|
* Helpers used by schema upgrades.
|
|
*/
|
|
nsresult MigrateV7Up();
|
|
nsresult MigrateV8Up();
|
|
nsresult MigrateV9Up();
|
|
nsresult MigrateV10Up();
|
|
nsresult MigrateV11Up();
|
|
nsresult MigrateV13Up();
|
|
nsresult MigrateV14Up();
|
|
nsresult MigrateV15Up();
|
|
nsresult MigrateV16Up();
|
|
nsresult MigrateV17Up();
|
|
nsresult MigrateV18Up();
|
|
nsresult MigrateV19Up();
|
|
nsresult MigrateV20Up();
|
|
nsresult MigrateV21Up();
|
|
nsresult MigrateV22Up();
|
|
nsresult MigrateV23Up();
|
|
nsresult MigrateV24Up();
|
|
|
|
nsresult UpdateBookmarkRootTitles();
|
|
nsresult CheckAndUpdateGUIDs();
|
|
|
|
private:
|
|
~Database();
|
|
|
|
/**
|
|
* Singleton getter, invoked by class instantiation.
|
|
*/
|
|
static already_AddRefed<Database> GetSingleton();
|
|
|
|
static Database* gDatabase;
|
|
|
|
nsCOMPtr<mozIStorageConnection> mMainConn;
|
|
|
|
mutable StatementCache mMainThreadStatements;
|
|
mutable AsyncStatementCache mMainThreadAsyncStatements;
|
|
mutable StatementCache mAsyncThreadStatements;
|
|
|
|
int32_t mDBPageSize;
|
|
uint16_t mDatabaseStatus;
|
|
bool mShuttingDown;
|
|
bool mClosed;
|
|
};
|
|
|
|
} // namespace places
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_places_Database_h_
|