AppCacheHost cache selection algorithm

webkit/appcache/appcache.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_APPCACHE_APPCACHE_H_
 #define WEBKIT_APPCACHE_APPCACHE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 12 matching lines @@
 class AppCacheService;
 
 // Set of cached resources for an application. A cache exists as long as a
 // host is associated with it, the cache is in an appcache group or the
 // cache is being created during an appcache upate.
 class AppCache : public base::RefCounted<AppCache> {
  public:
   AppCache(AppCacheService *service, int64 cache_id);
   ~AppCache();
 
-  int64 cache_id() { return cache_id_; }
+  int64 cache_id() const { return cache_id_; }
 
-  AppCacheGroup* owning_group() { return owning_group_; }
+  AppCacheGroup* owning_group() const { return owning_group_; }
   void set_owning_group(AppCacheGroup* group) { owning_group_ = group; }
 
-  bool is_complete() { return is_complete_; }
+  bool is_complete() const { return is_complete_; }
   void set_complete(bool value) { is_complete_ = value; }
 
+  AppCacheService* service() const { return service_; }
+
   // Adds a new entry. Entry must not already be in cache.
   void AddEntry(const GURL& url, const AppCacheEntry& entry);
 
   // Adds a new entry or modifies an existing entry by merging the types
   // of the new entry with the existing entry.
   void AddOrModifyEntry(const GURL& url, const AppCacheEntry& entry);
 
   // Do not store the returned object as it could be deleted anytime.
   AppCacheEntry* GetEntry(const GURL& url);
 
   typedef std::map<GURL, AppCacheEntry> EntryMap;
-  const EntryMap& entries() { return entries_; }
+  const EntryMap& entries() const { return entries_; }
 
-  bool IsNewerThan(AppCache* cache) {
+  bool IsNewerThan(AppCache* cache) const {
     return update_time_ > cache->update_time_;
   }
 
   void set_update_time(base::TimeTicks ticks = base::TimeTicks::Now()) {
     update_time_ = ticks;
   }
 
  private:
   friend class AppCacheHost;
 
-  // Use AppCacheHost::set_selected_cache() to manipulate host association.
+  // Use AppCacheHost::AssociateCache() to manipulate host association.
   void AssociateHost(AppCacheHost* host) {
     associated_hosts_.insert(host);
   }
   void UnassociateHost(AppCacheHost* host);
 
-  int64 cache_id_;
+  const int64 cache_id_;
   AppCacheEntry* manifest_;  // also in entry map
   AppCacheGroup* owning_group_;
   std::set<AppCacheHost*> associated_hosts_;
 
   EntryMap entries_;    // contains entries of all types
 
   std::vector<FallbackNamespace> fallback_namespaces_;
   std::vector<GURL> online_whitelist_namespaces_;
   bool online_whitelist_all_;
 
   bool is_complete_;
 
   // when this cache was last updated
   base::TimeTicks update_time_;
 
   // to notify service when cache is deleted
   AppCacheService* service_;
 };
 
 }  // namespace appcache
 
 #endif  // WEBKIT_APPCACHE_APPCACHE_H_