gecko/dom/indexedDB/IDBTransaction.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
2012-05-21 04:12:37 -07:00
/* 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_dom_indexeddb_idbtransaction_h__
#define mozilla_dom_indexeddb_idbtransaction_h__
#include "mozilla/dom/indexedDB/IndexedDatabase.h"
#include "mozIStorageConnection.h"
#include "mozIStorageStatement.h"
#include "mozIStorageFunction.h"
#include "nsIIDBTransaction.h"
#include "nsIDOMDOMError.h"
#include "nsIRunnable.h"
#include "nsAutoPtr.h"
#include "nsClassHashtable.h"
#include "nsHashKeys.h"
#include "nsInterfaceHashtable.h"
#include "mozilla/dom/indexedDB/IDBDatabase.h"
#include "mozilla/dom/indexedDB/IDBWrapperCache.h"
#include "mozilla/dom/indexedDB/FileInfo.h"
class nsIThread;
BEGIN_INDEXEDDB_NAMESPACE
class AsyncConnectionHelper;
class CommitHelper;
class IDBRequest;
class IndexedDBDatabaseChild;
class IndexedDBTransactionChild;
class IndexedDBTransactionParent;
struct ObjectStoreInfo;
class TransactionThreadPool;
class UpdateRefcountFunction;
class IDBTransactionListener
{
public:
NS_IMETHOD_(nsrefcnt) AddRef() = 0;
NS_IMETHOD_(nsrefcnt) Release() = 0;
// Called just before dispatching the final events on the transaction.
virtual nsresult NotifyTransactionPreComplete(IDBTransaction* aTransaction) = 0;
// Called just after dispatching the final events on the transaction.
virtual nsresult NotifyTransactionPostComplete(IDBTransaction* aTransaction) = 0;
};
class IDBTransaction : public IDBWrapperCache,
public nsIIDBTransaction,
public nsIRunnable
{
friend class AsyncConnectionHelper;
friend class CommitHelper;
friend class IndexedDBDatabaseChild;
friend class ThreadObserver;
friend class TransactionThreadPool;
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIIDBTRANSACTION
NS_DECL_NSIRUNNABLE
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(IDBTransaction, IDBWrapperCache)
enum Mode
{
READ_ONLY = 0,
READ_WRITE,
VERSION_CHANGE,
// Only needed for IPC serialization helper, should never be used in code.
MODE_INVALID
};
enum ReadyState
{
INITIAL = 0,
LOADING,
COMMITTING,
DONE
};
static already_AddRefed<IDBTransaction>
Create(IDBDatabase* aDatabase,
nsTArray<nsString>& aObjectStoreNames,
Mode aMode,
bool aDispatchDelayed)
{
return CreateInternal(aDatabase, aObjectStoreNames, aMode, aDispatchDelayed,
false);
}
// nsIDOMEventTarget
virtual nsresult PreHandleEvent(nsEventChainPreVisitor& aVisitor);
void OnNewRequest();
void OnRequestFinished();
void OnRequestDisconnected();
void RemoveObjectStore(const nsAString& aName);
void SetTransactionListener(IDBTransactionListener* aListener);
bool StartSavepoint();
nsresult ReleaseSavepoint();
void RollbackSavepoint();
// Only meant to be called on mStorageThread!
nsresult GetOrCreateConnection(mozIStorageConnection** aConnection);
already_AddRefed<mozIStorageStatement>
GetCachedStatement(const nsACString& aQuery);
template<int N>
already_AddRefed<mozIStorageStatement>
GetCachedStatement(const char (&aQuery)[N])
{
return GetCachedStatement(NS_LITERAL_CSTRING(aQuery));
}
bool IsOpen() const;
bool IsFinished() const
{
return mReadyState > LOADING;
}
bool IsWriteAllowed() const
{
return mMode == READ_WRITE || mMode == VERSION_CHANGE;
}
bool IsAborted() const
{
return NS_FAILED(mAbortCode);
}
// 'Get' prefix is to avoid name collisions with the enum
Mode GetMode()
{
return mMode;
}
IDBDatabase* Database()
{
NS_ASSERTION(mDatabase, "This should never be null!");
return mDatabase;
}
DatabaseInfo* DBInfo() const
{
return mDatabaseInfo;
}
already_AddRefed<IDBObjectStore>
GetOrCreateObjectStore(const nsAString& aName,
ObjectStoreInfo* aObjectStoreInfo,
bool aCreating);
already_AddRefed<FileInfo> GetFileInfo(nsIDOMBlob* aBlob);
void AddFileInfo(nsIDOMBlob* aBlob, FileInfo* aFileInfo);
void ClearCreatedFileInfos();
void
SetActor(IndexedDBTransactionChild* aActorChild)
{
NS_ASSERTION(!aActorChild || !mActorChild, "Shouldn't have more than one!");
mActorChild = aActorChild;
}
void
SetActor(IndexedDBTransactionParent* aActorParent)
{
NS_ASSERTION(!aActorParent || !mActorParent,
"Shouldn't have more than one!");
mActorParent = aActorParent;
}
IndexedDBTransactionChild*
GetActorChild() const
{
return mActorChild;
}
IndexedDBTransactionParent*
GetActorParent() const
{
return mActorParent;
}
nsresult
ObjectStoreInternal(const nsAString& aName,
IDBObjectStore** _retval);
nsresult
Abort(IDBRequest* aRequest);
nsresult
Abort(nsresult aAbortCode);
nsresult
GetAbortCode() const
{
return mAbortCode;
}
private:
nsresult
AbortInternal(nsresult aAbortCode, already_AddRefed<nsIDOMDOMError> aError);
// Should only be called directly through IndexedDBDatabaseChild.
static already_AddRefed<IDBTransaction>
CreateInternal(IDBDatabase* aDatabase,
nsTArray<nsString>& aObjectStoreNames,
Mode aMode,
bool aDispatchDelayed,
bool aIsVersionChangeTransactionChild);
IDBTransaction();
~IDBTransaction();
nsresult CommitOrRollback();
nsRefPtr<IDBDatabase> mDatabase;
nsRefPtr<DatabaseInfo> mDatabaseInfo;
nsCOMPtr<nsIDOMDOMError> mError;
nsTArray<nsString> mObjectStoreNames;
ReadyState mReadyState;
Mode mMode;
uint32_t mPendingRequests;
nsInterfaceHashtable<nsCStringHashKey, mozIStorageStatement>
mCachedStatements;
nsRefPtr<IDBTransactionListener> mListener;
// Only touched on the database thread.
nsCOMPtr<mozIStorageConnection> mConnection;
// Only touched on the database thread.
uint32_t mSavepointCount;
nsTArray<nsRefPtr<IDBObjectStore> > mCreatedObjectStores;
nsTArray<nsRefPtr<IDBObjectStore> > mDeletedObjectStores;
nsRefPtr<UpdateRefcountFunction> mUpdateFileRefcountFunction;
nsRefPtrHashtable<nsISupportsHashKey, FileInfo> mCreatedFileInfos;
IndexedDBTransactionChild* mActorChild;
IndexedDBTransactionParent* mActorParent;
nsresult mAbortCode;
bool mCreating;
#ifdef DEBUG
bool mFiredCompleteOrAbort;
#endif
};
class CommitHelper MOZ_FINAL : public nsIRunnable
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIRUNNABLE
CommitHelper(IDBTransaction* aTransaction,
IDBTransactionListener* aListener,
const nsTArray<nsRefPtr<IDBObjectStore> >& mUpdatedObjectStores);
CommitHelper(IDBTransaction* aTransaction,
nsresult aAbortCode);
~CommitHelper();
template<class T>
bool AddDoomedObject(nsCOMPtr<T>& aCOMPtr)
{
if (aCOMPtr) {
if (!mDoomedObjects.AppendElement(do_QueryInterface(aCOMPtr))) {
NS_ERROR("Out of memory!");
return false;
}
aCOMPtr = nullptr;
}
return true;
}
private:
// Writes new autoincrement counts to database
nsresult WriteAutoIncrementCounts();
// Updates counts after a successful commit
void CommitAutoIncrementCounts();
// Reverts counts when a transaction is aborted
void RevertAutoIncrementCounts();
nsRefPtr<IDBTransaction> mTransaction;
nsRefPtr<IDBTransactionListener> mListener;
nsCOMPtr<mozIStorageConnection> mConnection;
nsRefPtr<UpdateRefcountFunction> mUpdateFileRefcountFunction;
nsAutoTArray<nsCOMPtr<nsISupports>, 10> mDoomedObjects;
nsAutoTArray<nsRefPtr<IDBObjectStore>, 10> mAutoIncrementObjectStores;
nsresult mAbortCode;
};
class UpdateRefcountFunction MOZ_FINAL : public mozIStorageFunction
{
public:
NS_DECL_ISUPPORTS
NS_DECL_MOZISTORAGEFUNCTION
UpdateRefcountFunction(FileManager* aFileManager)
: mFileManager(aFileManager)
{ }
~UpdateRefcountFunction()
{ }
nsresult Init();
void ClearFileInfoEntries()
{
mFileInfoEntries.Clear();
}
nsresult WillCommit(mozIStorageConnection* aConnection);
void DidCommit();
void DidAbort();
private:
class FileInfoEntry
{
public:
FileInfoEntry(FileInfo* aFileInfo)
: mFileInfo(aFileInfo), mDelta(0)
{ }
~FileInfoEntry()
{ }
nsRefPtr<FileInfo> mFileInfo;
int32_t mDelta;
};
enum UpdateType {
eIncrement,
eDecrement
};
class DatabaseUpdateFunction
{
public:
DatabaseUpdateFunction(mozIStorageConnection* aConnection,
UpdateRefcountFunction* aFunction)
: mConnection(aConnection), mFunction(aFunction), mErrorCode(NS_OK)
{ }
bool Update(int64_t aId, int32_t aDelta);
nsresult ErrorCode()
{
return mErrorCode;
}
private:
nsresult UpdateInternal(int64_t aId, int32_t aDelta);
nsCOMPtr<mozIStorageConnection> mConnection;
nsCOMPtr<mozIStorageStatement> mUpdateStatement;
nsCOMPtr<mozIStorageStatement> mSelectStatement;
nsCOMPtr<mozIStorageStatement> mInsertStatement;
UpdateRefcountFunction* mFunction;
nsresult mErrorCode;
};
nsresult ProcessValue(mozIStorageValueArray* aValues,
int32_t aIndex,
UpdateType aUpdateType);
nsresult CreateJournals();
nsresult RemoveJournals(const nsTArray<int64_t>& aJournals);
static PLDHashOperator
DatabaseUpdateCallback(const uint64_t& aKey,
FileInfoEntry* aValue,
void* aUserArg);
static PLDHashOperator
FileInfoUpdateCallback(const uint64_t& aKey,
FileInfoEntry* aValue,
void* aUserArg);
FileManager* mFileManager;
nsClassHashtable<nsUint64HashKey, FileInfoEntry> mFileInfoEntries;
nsTArray<int64_t> mJournalsToCreateBeforeCommit;
nsTArray<int64_t> mJournalsToRemoveAfterCommit;
nsTArray<int64_t> mJournalsToRemoveAfterAbort;
};
END_INDEXEDDB_NAMESPACE
#endif // mozilla_dom_indexeddb_idbtransaction_h__