RetroZilla/netwerk/cache/public/nsICacheSession.idl
2015-10-20 23:03:22 -04:00

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/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is nsICacheSession.idl, released
* February 23, 2001.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Gordon Sheridan <gordon@netscape.com>
* Patrick Beard <beard@netscape.com>
* Darin Fisher <darin@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISupports.idl"
#include "nsICache.idl"
interface nsICacheEntryDescriptor;
interface nsICacheListener;
[scriptable, uuid(ae9e84b5-3e2d-457e-8fcd-5bbd2a8b832e)]
interface nsICacheSession : nsISupports
{
/**
* Expired entries will be doomed or evicted if this attribute is set to
* true. If false, expired entries will be returned (useful for offline-
* mode and clients, such as HTTP, that can update the valid lifetime of
* cached content). This attribute defaults to true.
*/
attribute PRBool doomEntriesIfExpired;
/**
* A cache session can only give out one descriptor with WRITE access
* to a given cache entry at a time. Until the client calls MarkValid on
* its descriptor, other attempts to open the same cache entry will block.
*/
/**
* Synchronous cache access. This returns a unique descriptor each
* time it is called, even if the same key is specified. When
* called by multiple threads for write access, only one writable
* descriptor will be granted. If 'blockingMode' is set to false, it will
* return NS_ERROR_CACHE_WAIT_FOR_VALIDATION rather than block when another
* descriptor has been given WRITE access but hasn't validated the entry yet.
*/
nsICacheEntryDescriptor openCacheEntry(in ACString key,
in nsCacheAccessMode accessRequested,
in boolean blockingMode);
/**
* Asynchronous cache access. Does not block the calling thread.
* Instead, the listener will be notified when the descriptor is
* available.
*/
void asyncOpenCacheEntry(in ACString key,
in nsCacheAccessMode accessRequested,
in nsICacheListener listener);
/**
* Evict all entries for this session's clientID according to its storagePolicy.
*/
void evictEntries();
/**
* Return whether any of the cache devices implied by the session storage policy
* are currently enabled for instantiation if they don't already exist.
*/
PRBool isStorageEnabled();
};