gecko-dev/netwerk/cache/nsICacheService.idl
2012-05-21 12:12:37 +01:00

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/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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/. */
#include "nsISupports.idl"
#include "nsICache.idl"
interface nsISimpleEnumerator;
interface nsICacheListener;
interface nsICacheSession;
interface nsICacheVisitor;
interface nsIEventTarget;
[scriptable, uuid(14dbe1e9-f3bc-45af-92f4-2c574fcd4e39)]
interface nsICacheService : nsISupports
{
/**
* Create a cache session
*
* A cache session represents a client's access into the cache. The cache
* session is not "owned" by the cache service. Hence, it is possible to
* create duplicate cache sessions. Entries created by a cache session
* are invisible to other cache sessions, unless the cache sessions are
* equivalent.
*
* @param clientID - Specifies the name of the client using the cache.
* @param storagePolicy - Limits the storage policy for all entries
* accessed via the returned session. As a result, devices excluded
* by the storage policy will not be searched when opening entries
* from the returned session.
* @param streamBased - Indicates whether or not the data being cached
* can be represented as a stream. The storagePolicy must be
* consistent with the value of this field. For example, a non-stream-
* based cache entry can only have a storage policy of STORE_IN_MEMORY.
* @return new cache session.
*/
nsICacheSession createSession(in string clientID,
in nsCacheStoragePolicy storagePolicy,
in boolean streamBased);
/**
* Visit entries stored in the cache. Used to implement about:cache.
*/
void visitEntries(in nsICacheVisitor visitor);
/**
* Evicts all entries in all devices implied by the storage policy.
*
* @note This function may evict some items but will throw if it fails to evict
* everything.
*/
void evictEntries(in nsCacheStoragePolicy storagePolicy);
/**
* Event target which is used for I/O operations
*/
readonly attribute nsIEventTarget cacheIOTarget;
};
%{C++
/**
* Observer service notification that is sent when
* nsICacheService::evictEntries() or nsICacheSession::evictEntries()
* is called.
*/
#define NS_CACHESERVICE_EMPTYCACHE_TOPIC_ID "cacheservice:empty-cache"
%}