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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "webkit/browser/appcache/appcache_group.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "base/message_loop/message_loop.h" | |
| 12 #include "webkit/browser/appcache/appcache.h" | |
| 13 #include "webkit/browser/appcache/appcache_host.h" | |
| 14 #include "webkit/browser/appcache/appcache_service_impl.h" | |
| 15 #include "webkit/browser/appcache/appcache_storage.h" | |
| 16 #include "webkit/browser/appcache/appcache_update_job.h" | |
| 17 | |
| 18 namespace appcache { | |
| 19 | |
| 20 class AppCacheGroup; | |
| 21 | |
| 22 // Use this helper class because we cannot make AppCacheGroup a derived class | |
| 23 // of AppCacheHost::Observer as it would create a circular dependency between | |
| 24 // AppCacheHost and AppCacheGroup. | |
| 25 class AppCacheGroup::HostObserver : public AppCacheHost::Observer { | |
| 26 public: | |
| 27 explicit HostObserver(AppCacheGroup* group) : group_(group) {} | |
| 28 | |
| 29 // Methods for AppCacheHost::Observer. | |
| 30 virtual void OnCacheSelectionComplete(AppCacheHost* host) OVERRIDE {} // N/A | |
| 31 virtual void OnDestructionImminent(AppCacheHost* host) OVERRIDE { | |
| 32 group_->HostDestructionImminent(host); | |
| 33 } | |
| 34 private: | |
| 35 AppCacheGroup* group_; | |
| 36 }; | |
| 37 | |
| 38 AppCacheGroup::AppCacheGroup(AppCacheStorage* storage, | |
| 39 const GURL& manifest_url, | |
| 40 int64 group_id) | |
| 41 : group_id_(group_id), | |
| 42 manifest_url_(manifest_url), | |
| 43 update_status_(IDLE), | |
| 44 is_obsolete_(false), | |
| 45 is_being_deleted_(false), | |
| 46 newest_complete_cache_(NULL), | |
| 47 update_job_(NULL), | |
| 48 storage_(storage), | |
| 49 is_in_dtor_(false) { | |
| 50 storage_->working_set()->AddGroup(this); | |
| 51 host_observer_.reset(new HostObserver(this)); | |
| 52 } | |
| 53 | |
| 54 AppCacheGroup::~AppCacheGroup() { | |
| 55 DCHECK(old_caches_.empty()); | |
| 56 DCHECK(!newest_complete_cache_); | |
| 57 DCHECK(restart_update_task_.IsCancelled()); | |
| 58 DCHECK(queued_updates_.empty()); | |
| 59 | |
| 60 is_in_dtor_ = true; | |
| 61 | |
| 62 if (update_job_) | |
| 63 delete update_job_; | |
| 64 DCHECK_EQ(IDLE, update_status_); | |
| 65 | |
| 66 storage_->working_set()->RemoveGroup(this); | |
| 67 storage_->DeleteResponses(manifest_url_, newly_deletable_response_ids_); | |
| 68 } | |
| 69 | |
| 70 void AppCacheGroup::AddUpdateObserver(UpdateObserver* observer) { | |
| 71 // If observer being added is a host that has been queued for later update, | |
| 72 // add observer to a different observer list. | |
| 73 AppCacheHost* host = static_cast<AppCacheHost*>(observer); | |
| 74 if (queued_updates_.find(host) != queued_updates_.end()) | |
| 75 queued_observers_.AddObserver(observer); | |
| 76 else | |
| 77 observers_.AddObserver(observer); | |
| 78 } | |
| 79 | |
| 80 void AppCacheGroup::RemoveUpdateObserver(UpdateObserver* observer) { | |
| 81 observers_.RemoveObserver(observer); | |
| 82 queued_observers_.RemoveObserver(observer); | |
| 83 } | |
| 84 | |
| 85 void AppCacheGroup::AddCache(AppCache* complete_cache) { | |
| 86 DCHECK(complete_cache->is_complete()); | |
| 87 complete_cache->set_owning_group(this); | |
| 88 | |
| 89 if (!newest_complete_cache_) { | |
| 90 newest_complete_cache_ = complete_cache; | |
| 91 return; | |
| 92 } | |
| 93 | |
| 94 if (complete_cache->IsNewerThan(newest_complete_cache_)) { | |
| 95 old_caches_.push_back(newest_complete_cache_); | |
| 96 newest_complete_cache_ = complete_cache; | |
| 97 | |
| 98 // Update hosts of older caches to add a reference to the newest cache. | |
| 99 for (Caches::iterator it = old_caches_.begin(); | |
| 100 it != old_caches_.end(); ++it) { | |
| 101 AppCache::AppCacheHosts& hosts = (*it)->associated_hosts(); | |
| 102 for (AppCache::AppCacheHosts::iterator host_it = hosts.begin(); | |
| 103 host_it != hosts.end(); ++host_it) { | |
| 104 (*host_it)->SetSwappableCache(this); | |
| 105 } | |
| 106 } | |
| 107 } else { | |
| 108 old_caches_.push_back(complete_cache); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 void AppCacheGroup::RemoveCache(AppCache* cache) { | |
| 113 DCHECK(cache->associated_hosts().empty()); | |
| 114 if (cache == newest_complete_cache_) { | |
| 115 AppCache* tmp_cache = newest_complete_cache_; | |
| 116 newest_complete_cache_ = NULL; | |
| 117 tmp_cache->set_owning_group(NULL); // may cause this group to be deleted | |
| 118 } else { | |
| 119 scoped_refptr<AppCacheGroup> protect(this); | |
| 120 | |
| 121 Caches::iterator it = | |
| 122 std::find(old_caches_.begin(), old_caches_.end(), cache); | |
| 123 if (it != old_caches_.end()) { | |
| 124 AppCache* tmp_cache = *it; | |
| 125 old_caches_.erase(it); | |
| 126 tmp_cache->set_owning_group(NULL); // may cause group to be released | |
| 127 } | |
| 128 | |
| 129 if (!is_obsolete() && old_caches_.empty() && | |
| 130 !newly_deletable_response_ids_.empty()) { | |
| 131 storage_->DeleteResponses(manifest_url_, newly_deletable_response_ids_); | |
| 132 newly_deletable_response_ids_.clear(); | |
| 133 } | |
| 134 } | |
| 135 } | |
| 136 | |
| 137 void AppCacheGroup::AddNewlyDeletableResponseIds( | |
| 138 std::vector<int64>* response_ids) { | |
| 139 if (is_being_deleted() || (!is_obsolete() && old_caches_.empty())) { | |
| 140 storage_->DeleteResponses(manifest_url_, *response_ids); | |
| 141 response_ids->clear(); | |
| 142 return; | |
| 143 } | |
| 144 | |
| 145 if (newly_deletable_response_ids_.empty()) { | |
| 146 newly_deletable_response_ids_.swap(*response_ids); | |
| 147 return; | |
| 148 } | |
| 149 newly_deletable_response_ids_.insert( | |
| 150 newly_deletable_response_ids_.end(), | |
| 151 response_ids->begin(), response_ids->end()); | |
| 152 response_ids->clear(); | |
| 153 } | |
| 154 | |
| 155 void AppCacheGroup::StartUpdateWithNewMasterEntry( | |
| 156 AppCacheHost* host, const GURL& new_master_resource) { | |
| 157 DCHECK(!is_obsolete() && !is_being_deleted()); | |
| 158 if (is_in_dtor_) | |
| 159 return; | |
| 160 | |
| 161 if (!update_job_) | |
| 162 update_job_ = new AppCacheUpdateJob(storage_->service(), this); | |
| 163 | |
| 164 update_job_->StartUpdate(host, new_master_resource); | |
| 165 | |
| 166 // Run queued update immediately as an update has been started manually. | |
| 167 if (!restart_update_task_.IsCancelled()) { | |
| 168 restart_update_task_.Cancel(); | |
| 169 RunQueuedUpdates(); | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 void AppCacheGroup::CancelUpdate() { | |
| 174 if (update_job_) { | |
| 175 delete update_job_; | |
| 176 DCHECK(!update_job_); | |
| 177 DCHECK_EQ(IDLE, update_status_); | |
| 178 } | |
| 179 } | |
| 180 | |
| 181 void AppCacheGroup::QueueUpdate(AppCacheHost* host, | |
| 182 const GURL& new_master_resource) { | |
| 183 DCHECK(update_job_ && host && !new_master_resource.is_empty()); | |
| 184 queued_updates_.insert(QueuedUpdates::value_type(host, new_master_resource)); | |
| 185 | |
| 186 // Need to know when host is destroyed. | |
| 187 host->AddObserver(host_observer_.get()); | |
| 188 | |
| 189 // If host is already observing for updates, move host to queued observers | |
| 190 // list so that host is not notified when the current update completes. | |
| 191 if (FindObserver(host, observers_)) { | |
| 192 observers_.RemoveObserver(host); | |
| 193 queued_observers_.AddObserver(host); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 void AppCacheGroup::RunQueuedUpdates() { | |
| 198 if (!restart_update_task_.IsCancelled()) | |
| 199 restart_update_task_.Cancel(); | |
| 200 | |
| 201 if (queued_updates_.empty()) | |
| 202 return; | |
| 203 | |
| 204 QueuedUpdates updates_to_run; | |
| 205 queued_updates_.swap(updates_to_run); | |
| 206 DCHECK(queued_updates_.empty()); | |
| 207 | |
| 208 for (QueuedUpdates::iterator it = updates_to_run.begin(); | |
| 209 it != updates_to_run.end(); ++it) { | |
| 210 AppCacheHost* host = it->first; | |
| 211 host->RemoveObserver(host_observer_.get()); | |
| 212 if (FindObserver(host, queued_observers_)) { | |
| 213 queued_observers_.RemoveObserver(host); | |
| 214 observers_.AddObserver(host); | |
| 215 } | |
| 216 | |
| 217 if (!is_obsolete() && !is_being_deleted()) | |
| 218 StartUpdateWithNewMasterEntry(host, it->second); | |
| 219 } | |
| 220 } | |
| 221 | |
| 222 bool AppCacheGroup::FindObserver(UpdateObserver* find_me, | |
| 223 const ObserverList<UpdateObserver>& observer_list) { | |
| 224 return observer_list.HasObserver(find_me); | |
| 225 } | |
| 226 | |
| 227 void AppCacheGroup::ScheduleUpdateRestart(int delay_ms) { | |
| 228 DCHECK(restart_update_task_.IsCancelled()); | |
| 229 restart_update_task_.Reset( | |
| 230 base::Bind(&AppCacheGroup::RunQueuedUpdates, this)); | |
| 231 base::MessageLoop::current()->PostDelayedTask( | |
| 232 FROM_HERE, | |
| 233 restart_update_task_.callback(), | |
| 234 base::TimeDelta::FromMilliseconds(delay_ms)); | |
| 235 } | |
| 236 | |
| 237 void AppCacheGroup::HostDestructionImminent(AppCacheHost* host) { | |
| 238 queued_updates_.erase(host); | |
| 239 if (queued_updates_.empty() && !restart_update_task_.IsCancelled()) | |
| 240 restart_update_task_.Cancel(); | |
| 241 } | |
| 242 | |
| 243 void AppCacheGroup::SetUpdateAppCacheStatus(UpdateAppCacheStatus status) { | |
| 244 if (status == update_status_) | |
| 245 return; | |
| 246 | |
| 247 update_status_ = status; | |
| 248 | |
| 249 if (status != IDLE) { | |
| 250 DCHECK(update_job_); | |
| 251 } else { | |
| 252 update_job_ = NULL; | |
| 253 | |
| 254 // Observers may release us in these callbacks, so we protect against | |
| 255 // deletion by adding an extra ref in this scope (but only if we're not | |
| 256 // in our destructor). | |
| 257 scoped_refptr<AppCacheGroup> protect(is_in_dtor_ ? NULL : this); | |
| 258 FOR_EACH_OBSERVER(UpdateObserver, observers_, OnUpdateComplete(this)); | |
| 259 if (!queued_updates_.empty()) | |
| 260 ScheduleUpdateRestart(kUpdateRestartDelayMs); | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 } // namespace appcache | |
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Chromium Code Reviews
Issue 344493002:
Move all remaining appcache-related code to content namespace (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src