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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "modules/webdatabase/DatabaseManager.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/ScriptExecutionContext.h"
#include "core/inspector/InspectorDatabaseInstrumentation.h"
#include "core/platform/Logging.h"
#include "modules/webdatabase/AbstractDatabaseServer.h"
#include "modules/webdatabase/Database.h"
#include "modules/webdatabase/DatabaseBackend.h"
#include "modules/webdatabase/DatabaseBackendBase.h"
#include "modules/webdatabase/DatabaseBackendContext.h"
#include "modules/webdatabase/DatabaseBackendSync.h"
#include "modules/webdatabase/DatabaseCallback.h"
#include "modules/webdatabase/DatabaseContext.h"
#include "modules/webdatabase/DatabaseServer.h"
#include "modules/webdatabase/DatabaseSync.h"
#include "modules/webdatabase/DatabaseTask.h"
#include "weborigin/SecurityOrigin.h"
namespace WebCore {
DatabaseManager& DatabaseManager::manager()
{
static DatabaseManager* dbManager = 0;
// FIXME: The following is vulnerable to a race between threads. Need to
// implement a thread safe on-first-use static initializer.
if (!dbManager)
dbManager = new DatabaseManager();
return *dbManager;
}
DatabaseManager::DatabaseManager()
#if !ASSERT_DISABLED
: m_databaseContextRegisteredCount(0)
, m_databaseContextInstanceCount(0)
#endif
{
m_server = new DatabaseServer;
ASSERT(m_server); // We should always have a server to work with.
}
class DatabaseCreationCallbackTask : public ScriptExecutionContext::Task {
public:
static PassOwnPtr<DatabaseCreationCallbackTask> create(PassRefPtr<Database> database, PassRefPtr<DatabaseCallback> creationCallback)
{
return adoptPtr(new DatabaseCreationCallbackTask(database, creationCallback));
}
virtual void performTask(ScriptExecutionContext*)
{
m_creationCallback->handleEvent(m_database.get());
}
private:
DatabaseCreationCallbackTask(PassRefPtr<Database> database, PassRefPtr<DatabaseCallback> callback)
: m_database(database)
, m_creationCallback(callback)
{
}
RefPtr<Database> m_database;
RefPtr<DatabaseCallback> m_creationCallback;
};
PassRefPtr<DatabaseContext> DatabaseManager::existingDatabaseContextFor(ScriptExecutionContext* context)
{
MutexLocker locker(m_contextMapLock);
ASSERT(m_databaseContextRegisteredCount >= 0);
ASSERT(m_databaseContextInstanceCount >= 0);
ASSERT(m_databaseContextRegisteredCount <= m_databaseContextInstanceCount);
RefPtr<DatabaseContext> databaseContext = adoptRef(m_contextMap.get(context));
if (databaseContext) {
// If we're instantiating a new DatabaseContext, the new instance would
// carry a new refCount of 1. The client expects this and will simply
// adoptRef the databaseContext without ref'ing it.
// However, instead of instantiating a new instance, we're reusing
// an existing one that corresponds to the specified ScriptExecutionContext.
// Hence, that new refCount need to be attributed to the reused instance
// to ensure that the refCount is accurate when the client adopts the ref.
// We do this by ref'ing the reused databaseContext before returning it.
databaseContext->ref();
}
return databaseContext.release();
}
PassRefPtr<DatabaseContext> DatabaseManager::databaseContextFor(ScriptExecutionContext* context)
{
RefPtr<DatabaseContext> databaseContext = existingDatabaseContextFor(context);
if (!databaseContext)
databaseContext = adoptRef(new DatabaseContext(context));
return databaseContext.release();
}
void DatabaseManager::registerDatabaseContext(DatabaseContext* databaseContext)
{
MutexLocker locker(m_contextMapLock);
ScriptExecutionContext* context = databaseContext->scriptExecutionContext();
m_contextMap.set(context, databaseContext);
#if !ASSERT_DISABLED
m_databaseContextRegisteredCount++;
#endif
}
void DatabaseManager::unregisterDatabaseContext(DatabaseContext* databaseContext)
{
MutexLocker locker(m_contextMapLock);
ScriptExecutionContext* context = databaseContext->scriptExecutionContext();
ASSERT(m_contextMap.get(context));
#if !ASSERT_DISABLED
m_databaseContextRegisteredCount--;
#endif
m_contextMap.remove(context);
}
#if !ASSERT_DISABLED
void DatabaseManager::didConstructDatabaseContext()
{
MutexLocker lock(m_contextMapLock);
m_databaseContextInstanceCount++;
}
void DatabaseManager::didDestructDatabaseContext()
{
MutexLocker lock(m_contextMapLock);
m_databaseContextInstanceCount--;
ASSERT(m_databaseContextRegisteredCount <= m_databaseContextInstanceCount);
}
#endif
ExceptionCode DatabaseManager::exceptionCodeForDatabaseError(DatabaseError error)
{
switch (error) {
case DatabaseError::None:
return 0;
case DatabaseError::DatabaseIsBeingDeleted:
case DatabaseError::DatabaseSizeExceededQuota:
case DatabaseError::DatabaseSizeOverflowed:
case DatabaseError::GenericSecurityError:
return SECURITY_ERR;
case DatabaseError::InvalidDatabaseState:
return INVALID_STATE_ERR;
}
ASSERT_NOT_REACHED();
return 0; // Make some older compilers happy.
}
static void logOpenDatabaseError(ScriptExecutionContext* context, const String& name)
{
UNUSED_PARAM(context);
UNUSED_PARAM(name);
LOG(StorageAPI, "Database %s for origin %s not allowed to be established", name.ascii().data(),
context->securityOrigin()->toString().ascii().data());
}
PassRefPtr<DatabaseBackendBase> DatabaseManager::openDatabaseBackend(ScriptExecutionContext* context,
DatabaseType type, const String& name, const String& expectedVersion, const String& displayName,
unsigned long estimatedSize, bool setVersionInNewDatabase, DatabaseError& error, String& errorMessage)
{
ASSERT(error == DatabaseError::None);
RefPtr<DatabaseContext> databaseContext = databaseContextFor(context);
RefPtr<DatabaseBackendContext> backendContext = databaseContext->backend();
RefPtr<DatabaseBackendBase> backend = m_server->openDatabase(backendContext, type, name, expectedVersion,
displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
if (!backend) {
ASSERT(error != DatabaseError::None);
switch (error) {
case DatabaseError::DatabaseIsBeingDeleted:
case DatabaseError::DatabaseSizeOverflowed:
case DatabaseError::GenericSecurityError:
case DatabaseError::DatabaseSizeExceededQuota:
logOpenDatabaseError(context, name);
return 0;
case DatabaseError::InvalidDatabaseState:
logErrorMessage(context, errorMessage);
return 0;
default:
ASSERT_NOT_REACHED();
}
}
return backend.release();
}
PassRefPtr<Database> DatabaseManager::openDatabase(ScriptExecutionContext* context,
const String& name, const String& expectedVersion, const String& displayName,
unsigned long estimatedSize, PassRefPtr<DatabaseCallback> creationCallback,
DatabaseError& error)
{
ASSERT(error == DatabaseError::None);
bool setVersionInNewDatabase = !creationCallback;
String errorMessage;
RefPtr<DatabaseBackendBase> backend = openDatabaseBackend(context, DatabaseType::Async, name,
expectedVersion, displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
if (!backend)
return 0;
RefPtr<Database> database = Database::create(context, backend);
RefPtr<DatabaseContext> databaseContext = databaseContextFor(context);
databaseContext->setHasOpenDatabases();
InspectorInstrumentation::didOpenDatabase(context, database, context->securityOrigin()->host(), name, expectedVersion);
if (backend->isNew() && creationCallback.get()) {
LOG(StorageAPI, "Scheduling DatabaseCreationCallbackTask for database %p\n", database.get());
database->m_scriptExecutionContext->postTask(DatabaseCreationCallbackTask::create(database, creationCallback));
}
ASSERT(database);
return database.release();
}
PassRefPtr<DatabaseSync> DatabaseManager::openDatabaseSync(ScriptExecutionContext* context,
const String& name, const String& expectedVersion, const String& displayName,
unsigned long estimatedSize, PassRefPtr<DatabaseCallback> creationCallback, DatabaseError& error)
{
ASSERT(context->isContextThread());
ASSERT(error == DatabaseError::None);
bool setVersionInNewDatabase = !creationCallback;
String errorMessage;
RefPtr<DatabaseBackendBase> backend = openDatabaseBackend(context, DatabaseType::Sync, name,
expectedVersion, displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
if (!backend)
return 0;
RefPtr<DatabaseSync> database = DatabaseSync::create(context, backend);
if (backend->isNew() && creationCallback.get()) {
LOG(StorageAPI, "Invoking the creation callback for database %p\n", database.get());
creationCallback->handleEvent(database.get());
}
ASSERT(database);
return database.release();
}
bool DatabaseManager::hasOpenDatabases(ScriptExecutionContext* context)
{
RefPtr<DatabaseContext> databaseContext = existingDatabaseContextFor(context);
if (!databaseContext)
return false;
return databaseContext->hasOpenDatabases();
}
void DatabaseManager::stopDatabases(ScriptExecutionContext* context, DatabaseTaskSynchronizer* synchronizer)
{
RefPtr<DatabaseContext> databaseContext = existingDatabaseContextFor(context);
if (!databaseContext || !databaseContext->stopDatabases(synchronizer))
if (synchronizer)
synchronizer->taskCompleted();
}
String DatabaseManager::fullPathForDatabase(SecurityOrigin* origin, const String& name, bool createIfDoesNotExist)
{
return m_server->fullPathForDatabase(origin, name, createIfDoesNotExist);
}
void DatabaseManager::closeDatabasesImmediately(const String& originIdentifier, const String& name)
{
m_server->closeDatabasesImmediately(originIdentifier, name);
}
void DatabaseManager::interruptAllDatabasesForContext(ScriptExecutionContext* context)
{
RefPtr<DatabaseContext> databaseContext = existingDatabaseContextFor(context);
if (databaseContext)
m_server->interruptAllDatabasesForContext(databaseContext->backend().get());
}
void DatabaseManager::logErrorMessage(ScriptExecutionContext* context, const String& message)
{
context->addConsoleMessage(StorageMessageSource, ErrorMessageLevel, message);
}
} // namespace WebCore