e83916216b
347852, patch by Alfred Kayser <alfredkayser@nl.ibm.com>, r=darin, sr=bzbarsky git-svn-id: svn://10.0.0.236/trunk@216216 18797224-902f-48f8-a5cc-f745e15eee43
130 lines
4.9 KiB
C++
130 lines
4.9 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et cin: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla.
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*
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* The Initial Developer of the Original Code is IBM Corporation.
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* Portions created by IBM Corporation are Copyright (C) 2004
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* IBM Corporation. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@meer.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsDiskCacheDeviceSQL_h__
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#define nsDiskCacheDeviceSQL_h__
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#include "nsCacheDevice.h"
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#include "nsILocalFile.h"
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#include "nsIObserver.h"
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#include "mozIStorageConnection.h"
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#include "nsCOMPtr.h"
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class nsDiskCacheDevice : public nsCacheDevice
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{
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public:
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nsDiskCacheDevice();
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/**
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* nsCacheDevice methods
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*/
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virtual ~nsDiskCacheDevice();
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virtual nsresult Init();
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virtual nsresult Shutdown();
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virtual const char * GetDeviceID(void);
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virtual nsCacheEntry * FindEntry(nsCString * key, PRBool *collision);
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virtual nsresult DeactivateEntry(nsCacheEntry * entry);
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virtual nsresult BindEntry(nsCacheEntry * entry);
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virtual void DoomEntry( nsCacheEntry * entry );
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virtual nsresult OpenInputStreamForEntry(nsCacheEntry * entry,
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nsCacheAccessMode mode,
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PRUint32 offset,
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nsIInputStream ** result);
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virtual nsresult OpenOutputStreamForEntry(nsCacheEntry * entry,
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nsCacheAccessMode mode,
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PRUint32 offset,
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nsIOutputStream ** result);
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virtual nsresult GetFileForEntry(nsCacheEntry * entry,
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nsIFile ** result);
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virtual nsresult OnDataSizeChange(nsCacheEntry * entry, PRInt32 deltaSize);
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virtual nsresult Visit(nsICacheVisitor * visitor);
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virtual nsresult EvictEntries(const char * clientID);
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/**
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* Preference accessors
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*/
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void SetCacheParentDirectory(nsILocalFile * parentDir);
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void SetCapacity(PRUint32 capacity);
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nsILocalFile * CacheDirectory() { return mCacheDirectory; }
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PRUint32 CacheCapacity() { return mCacheCapacity; }
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PRUint32 CacheSize();
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PRUint32 EntryCount();
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private:
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PRBool Initialized() { return mDB != nsnull; }
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nsresult EvictDiskCacheEntries(PRUint32 targetCapacity);
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nsresult UpdateEntry(nsCacheEntry *entry);
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nsresult UpdateEntrySize(nsCacheEntry *entry, PRUint32 newSize);
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nsresult DeleteEntry(nsCacheEntry *entry, PRBool deleteData);
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nsresult DeleteData(nsCacheEntry *entry);
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nsresult EnableEvictionObserver();
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nsresult DisableEvictionObserver();
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#if 0
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// sqlite function for observing DELETE events
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static void EvictionObserver(struct sqlite3_context *, int, struct Mem **);
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#endif
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nsCOMPtr<mozIStorageConnection> mDB;
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nsCOMPtr<mozIStorageStatement> mStatement_CacheSize;
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nsCOMPtr<mozIStorageStatement> mStatement_EntryCount;
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nsCOMPtr<mozIStorageStatement> mStatement_UpdateEntry;
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nsCOMPtr<mozIStorageStatement> mStatement_UpdateEntrySize;
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nsCOMPtr<mozIStorageStatement> mStatement_DeleteEntry;
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nsCOMPtr<mozIStorageStatement> mStatement_FindEntry;
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nsCOMPtr<mozIStorageStatement> mStatement_BindEntry;
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nsCOMPtr<nsILocalFile> mCacheDirectory;
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PRUint32 mCacheCapacity; // XXX need soft/hard limits, currentTotal
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PRInt32 mDeltaCounter;
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};
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#endif // nsDiskCacheDeviceSQL_h__
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