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| 1 // Copyright 2014 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/quota/storage_monitor.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/stl_util.h" | |
| 10 #include "net/base/net_util.h" | |
| 11 #include "webkit/browser/quota/quota_manager.h" | |
| 12 #include "webkit/common/quota/quota_status_code.h" | |
| 13 | |
| 14 namespace storage { | |
| 15 | |
| 16 // StorageObserverList: | |
| 17 | |
| 18 StorageObserverList::ObserverState::ObserverState() | |
| 19 : requires_update(false) { | |
| 20 } | |
| 21 | |
| 22 StorageObserverList::StorageObserverList() {} | |
| 23 | |
| 24 StorageObserverList::~StorageObserverList() {} | |
| 25 | |
| 26 void StorageObserverList::AddObserver( | |
| 27 StorageObserver* observer, const StorageObserver::MonitorParams& params) { | |
| 28 ObserverState& observer_state = observers_[observer]; | |
| 29 observer_state.origin = params.filter.origin; | |
| 30 observer_state.rate = params.rate; | |
| 31 } | |
| 32 | |
| 33 void StorageObserverList::RemoveObserver(StorageObserver* observer) { | |
| 34 observers_.erase(observer); | |
| 35 } | |
| 36 | |
| 37 int StorageObserverList::ObserverCount() const { | |
| 38 return observers_.size(); | |
| 39 } | |
| 40 | |
| 41 void StorageObserverList::OnStorageChange(const StorageObserver::Event& event) { | |
| 42 for (StorageObserverStateMap::iterator it = observers_.begin(); | |
| 43 it != observers_.end(); ++it) { | |
| 44 it->second.requires_update = true; | |
| 45 } | |
| 46 | |
| 47 MaybeDispatchEvent(event); | |
| 48 } | |
| 49 | |
| 50 void StorageObserverList::MaybeDispatchEvent( | |
| 51 const StorageObserver::Event& event) { | |
| 52 notification_timer_.Stop(); | |
| 53 base::TimeDelta min_delay = base::TimeDelta::Max(); | |
| 54 bool all_observers_notified = true; | |
| 55 | |
| 56 for (StorageObserverStateMap::iterator it = observers_.begin(); | |
| 57 it != observers_.end(); ++it) { | |
| 58 if (!it->second.requires_update) | |
| 59 continue; | |
| 60 | |
| 61 base::TimeTicks current_time = base::TimeTicks::Now(); | |
| 62 base::TimeDelta delta = current_time - it->second.last_notification_time; | |
| 63 if (it->second.last_notification_time.is_null() || | |
| 64 delta >= it->second.rate) { | |
| 65 it->second.requires_update = false; | |
| 66 it->second.last_notification_time = current_time; | |
| 67 | |
| 68 if (it->second.origin == event.filter.origin) { | |
| 69 it->first->OnStorageEvent(event); | |
| 70 } else { | |
| 71 // When the quota and usage of an origin is requested, QuotaManager | |
| 72 // returns the quota and usage of the host. Multiple origins can map to | |
| 73 // to the same host, so ensure the |origin| field in the dispatched | |
| 74 // event matches the |origin| specified by the observer when it was | |
| 75 // registered. | |
| 76 StorageObserver::Event dispatch_event(event); | |
| 77 dispatch_event.filter.origin = it->second.origin; | |
| 78 it->first->OnStorageEvent(dispatch_event); | |
| 79 } | |
| 80 } else { | |
| 81 all_observers_notified = false; | |
| 82 base::TimeDelta delay = it->second.rate - delta; | |
| 83 if (delay < min_delay) | |
| 84 min_delay = delay; | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 // We need to respect the notification rate specified by observers. So if it | |
| 89 // is too soon to dispatch an event to an observer, save the event and | |
| 90 // dispatch it after a delay. If we simply drop the event, another one may | |
| 91 // not arrive anytime soon and the observer will miss the most recent event. | |
| 92 if (!all_observers_notified) { | |
| 93 pending_event_ = event; | |
| 94 notification_timer_.Start( | |
| 95 FROM_HERE, | |
| 96 min_delay, | |
| 97 this, | |
| 98 &StorageObserverList::DispatchPendingEvent); | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 void StorageObserverList::ScheduleUpdateForObserver(StorageObserver* observer) { | |
| 103 DCHECK(ContainsKey(observers_, observer)); | |
| 104 observers_[observer].requires_update = true; | |
| 105 } | |
| 106 | |
| 107 void StorageObserverList::DispatchPendingEvent() { | |
| 108 MaybeDispatchEvent(pending_event_); | |
| 109 } | |
| 110 | |
| 111 | |
| 112 // HostStorageObservers: | |
| 113 | |
| 114 HostStorageObservers::HostStorageObservers(QuotaManager* quota_manager) | |
| 115 : quota_manager_(quota_manager), | |
| 116 initialized_(false), | |
| 117 initializing_(false), | |
| 118 event_occurred_before_init_(false), | |
| 119 usage_deltas_during_init_(0), | |
| 120 cached_usage_(0), | |
| 121 cached_quota_(0), | |
| 122 weak_factory_(this) { | |
| 123 } | |
| 124 | |
| 125 HostStorageObservers::~HostStorageObservers() {} | |
| 126 | |
| 127 void HostStorageObservers::AddObserver( | |
| 128 StorageObserver* observer, | |
| 129 const StorageObserver::MonitorParams& params) { | |
| 130 observers_.AddObserver(observer, params); | |
| 131 | |
| 132 if (!params.dispatch_initial_state) | |
| 133 return; | |
| 134 | |
| 135 if (initialized_) { | |
| 136 StorageObserver::Event event(params.filter, | |
| 137 std::max<int64>(cached_usage_, 0), | |
| 138 std::max<int64>(cached_quota_, 0)); | |
| 139 observer->OnStorageEvent(event); | |
| 140 return; | |
| 141 } | |
| 142 | |
| 143 // Ensure the observer receives the initial storage state once initialization | |
| 144 // is complete. | |
| 145 observers_.ScheduleUpdateForObserver(observer); | |
| 146 StartInitialization(params.filter); | |
| 147 } | |
| 148 | |
| 149 void HostStorageObservers::RemoveObserver(StorageObserver* observer) { | |
| 150 observers_.RemoveObserver(observer); | |
| 151 } | |
| 152 | |
| 153 bool HostStorageObservers::ContainsObservers() const { | |
| 154 return observers_.ObserverCount() > 0; | |
| 155 } | |
| 156 | |
| 157 void HostStorageObservers::NotifyUsageChange( | |
| 158 const StorageObserver::Filter& filter, int64 delta) { | |
| 159 if (initialized_) { | |
| 160 cached_usage_ += delta; | |
| 161 DispatchEvent(filter, true); | |
| 162 return; | |
| 163 } | |
| 164 | |
| 165 // If a storage change occurs before initialization, ensure all observers will | |
| 166 // receive an event once initialization is complete. | |
| 167 event_occurred_before_init_ = true; | |
| 168 | |
| 169 // During QuotaManager::GetUsageAndQuotaForWebApps(), cached data is read | |
| 170 // synchronously, but other data may be retrieved asynchronously. A usage | |
| 171 // change may occur between the function call and callback. These deltas need | |
| 172 // to be added to the usage received by GotHostUsageAndQuota() to ensure | |
| 173 // |cached_usage_| is correctly initialized. | |
| 174 if (initializing_) { | |
| 175 usage_deltas_during_init_ += delta; | |
| 176 return; | |
| 177 } | |
| 178 | |
| 179 StartInitialization(filter); | |
| 180 } | |
| 181 | |
| 182 void HostStorageObservers::StartInitialization( | |
| 183 const StorageObserver::Filter& filter) { | |
| 184 if (initialized_ || initializing_) | |
| 185 return; | |
| 186 | |
| 187 initializing_ = true; | |
| 188 quota_manager_->GetUsageAndQuotaForWebApps( | |
| 189 filter.origin, | |
| 190 filter.storage_type, | |
| 191 base::Bind(&HostStorageObservers::GotHostUsageAndQuota, | |
| 192 weak_factory_.GetWeakPtr(), | |
| 193 filter)); | |
| 194 } | |
| 195 | |
| 196 void HostStorageObservers::GotHostUsageAndQuota( | |
| 197 const StorageObserver::Filter& filter, | |
| 198 QuotaStatusCode status, | |
| 199 int64 usage, | |
| 200 int64 quota) { | |
| 201 initializing_ = false; | |
| 202 if (status != kQuotaStatusOk) | |
| 203 return; | |
| 204 | |
| 205 initialized_ = true; | |
| 206 cached_quota_ = quota; | |
| 207 cached_usage_ = usage + usage_deltas_during_init_; | |
| 208 DispatchEvent(filter, event_occurred_before_init_); | |
| 209 } | |
| 210 | |
| 211 void HostStorageObservers::DispatchEvent( | |
| 212 const StorageObserver::Filter& filter, bool is_update) { | |
| 213 StorageObserver::Event event(filter, | |
| 214 std::max<int64>(cached_usage_, 0), | |
| 215 std::max<int64>(cached_quota_, 0)); | |
| 216 if (is_update) | |
| 217 observers_.OnStorageChange(event); | |
| 218 else | |
| 219 observers_.MaybeDispatchEvent(event); | |
| 220 } | |
| 221 | |
| 222 | |
| 223 // StorageTypeObservers: | |
| 224 | |
| 225 StorageTypeObservers::StorageTypeObservers(QuotaManager* quota_manager) | |
| 226 : quota_manager_(quota_manager) { | |
| 227 } | |
| 228 | |
| 229 StorageTypeObservers::~StorageTypeObservers() { | |
| 230 STLDeleteValues(&host_observers_map_); | |
| 231 } | |
| 232 | |
| 233 void StorageTypeObservers::AddObserver( | |
| 234 StorageObserver* observer, const StorageObserver::MonitorParams& params) { | |
| 235 std::string host = net::GetHostOrSpecFromURL(params.filter.origin); | |
| 236 if (host.empty()) | |
| 237 return; | |
| 238 | |
| 239 HostStorageObservers* host_observers = NULL; | |
| 240 HostObserversMap::iterator it = host_observers_map_.find(host); | |
| 241 if (it == host_observers_map_.end()) { | |
| 242 host_observers = new HostStorageObservers(quota_manager_); | |
| 243 host_observers_map_[host] = host_observers; | |
| 244 } else { | |
| 245 host_observers = it->second; | |
| 246 } | |
| 247 | |
| 248 host_observers->AddObserver(observer, params); | |
| 249 } | |
| 250 | |
| 251 void StorageTypeObservers::RemoveObserver(StorageObserver* observer) { | |
| 252 for (HostObserversMap::iterator it = host_observers_map_.begin(); | |
| 253 it != host_observers_map_.end(); ) { | |
| 254 it->second->RemoveObserver(observer); | |
| 255 if (!it->second->ContainsObservers()) { | |
| 256 delete it->second; | |
| 257 host_observers_map_.erase(it++); | |
| 258 } else { | |
| 259 ++it; | |
| 260 } | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 void StorageTypeObservers::RemoveObserverForFilter( | |
| 265 StorageObserver* observer, const StorageObserver::Filter& filter) { | |
| 266 std::string host = net::GetHostOrSpecFromURL(filter.origin); | |
| 267 HostObserversMap::iterator it = host_observers_map_.find(host); | |
| 268 if (it == host_observers_map_.end()) | |
| 269 return; | |
| 270 | |
| 271 it->second->RemoveObserver(observer); | |
| 272 if (!it->second->ContainsObservers()) { | |
| 273 delete it->second; | |
| 274 host_observers_map_.erase(it); | |
| 275 } | |
| 276 } | |
| 277 | |
| 278 const HostStorageObservers* StorageTypeObservers::GetHostObservers( | |
| 279 const std::string& host) const { | |
| 280 HostObserversMap::const_iterator it = host_observers_map_.find(host); | |
| 281 if (it != host_observers_map_.end()) | |
| 282 return it->second; | |
| 283 | |
| 284 return NULL; | |
| 285 } | |
| 286 | |
| 287 void StorageTypeObservers::NotifyUsageChange( | |
| 288 const StorageObserver::Filter& filter, int64 delta) { | |
| 289 std::string host = net::GetHostOrSpecFromURL(filter.origin); | |
| 290 HostObserversMap::iterator it = host_observers_map_.find(host); | |
| 291 if (it == host_observers_map_.end()) | |
| 292 return; | |
| 293 | |
| 294 it->second->NotifyUsageChange(filter, delta); | |
| 295 } | |
| 296 | |
| 297 | |
| 298 // StorageMonitor: | |
| 299 | |
| 300 StorageMonitor::StorageMonitor(QuotaManager* quota_manager) | |
| 301 : quota_manager_(quota_manager) { | |
| 302 } | |
| 303 | |
| 304 StorageMonitor::~StorageMonitor() { | |
| 305 STLDeleteValues(&storage_type_observers_map_); | |
| 306 } | |
| 307 | |
| 308 void StorageMonitor::AddObserver( | |
| 309 StorageObserver* observer, const StorageObserver::MonitorParams& params) { | |
| 310 DCHECK(observer); | |
| 311 | |
| 312 // Check preconditions. | |
| 313 if (params.filter.storage_type == kStorageTypeUnknown || | |
| 314 params.filter.storage_type == kStorageTypeQuotaNotManaged || | |
| 315 params.filter.origin.is_empty()) { | |
| 316 NOTREACHED(); | |
| 317 return; | |
| 318 } | |
| 319 | |
| 320 StorageTypeObservers* type_observers = NULL; | |
| 321 StorageTypeObserversMap::iterator it = | |
| 322 storage_type_observers_map_.find(params.filter.storage_type); | |
| 323 if (it == storage_type_observers_map_.end()) { | |
| 324 type_observers = new StorageTypeObservers(quota_manager_); | |
| 325 storage_type_observers_map_[params.filter.storage_type] = type_observers; | |
| 326 } else { | |
| 327 type_observers = it->second; | |
| 328 } | |
| 329 | |
| 330 type_observers->AddObserver(observer, params); | |
| 331 } | |
| 332 | |
| 333 void StorageMonitor::RemoveObserver(StorageObserver* observer) { | |
| 334 for (StorageTypeObserversMap::iterator it = | |
| 335 storage_type_observers_map_.begin(); | |
| 336 it != storage_type_observers_map_.end(); ++it) { | |
| 337 it->second->RemoveObserver(observer); | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 void StorageMonitor::RemoveObserverForFilter( | |
| 342 StorageObserver* observer, const StorageObserver::Filter& filter) { | |
| 343 StorageTypeObserversMap::iterator it = | |
| 344 storage_type_observers_map_.find(filter.storage_type); | |
| 345 if (it == storage_type_observers_map_.end()) | |
| 346 return; | |
| 347 | |
| 348 it->second->RemoveObserverForFilter(observer, filter); | |
| 349 } | |
| 350 | |
| 351 const StorageTypeObservers* StorageMonitor::GetStorageTypeObservers( | |
| 352 StorageType storage_type) const { | |
| 353 StorageTypeObserversMap::const_iterator it = | |
| 354 storage_type_observers_map_.find(storage_type); | |
| 355 if (it != storage_type_observers_map_.end()) | |
| 356 return it->second; | |
| 357 | |
| 358 return NULL; | |
| 359 } | |
| 360 | |
| 361 void StorageMonitor::NotifyUsageChange( | |
| 362 const StorageObserver::Filter& filter, int64 delta) { | |
| 363 // Check preconditions. | |
| 364 if (filter.storage_type == kStorageTypeUnknown || | |
| 365 filter.storage_type == kStorageTypeQuotaNotManaged || | |
| 366 filter.origin.is_empty()) { | |
| 367 NOTREACHED(); | |
| 368 return; | |
| 369 } | |
| 370 | |
| 371 StorageTypeObserversMap::iterator it = | |
| 372 storage_type_observers_map_.find(filter.storage_type); | |
| 373 if (it == storage_type_observers_map_.end()) | |
| 374 return; | |
| 375 | |
| 376 it->second->NotifyUsageChange(filter, delta); | |
| 377 } | |
| 378 | |
| 379 } // namespace storage | |
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Chromium Code Reviews
Issue 539143002:
Migrate webkit/browser/ to storage/browser/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master