src/content/browser/service_worker/service_worker_version.h

   1 // Copyright 2013 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 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_
   6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/callback.h"
  14 #include "base/gtest_prod_util.h"
  15 #include "base/id_map.h"
  16 #include "base/memory/ref_counted.h"
  17 #include "base/memory/scoped_ptr.h"
  18 #include "base/observer_list.h"
  19 #include "base/timer/timer.h"
  20 #include "content/browser/service_worker/embedded_worker_instance.h"
  21 #include "content/browser/service_worker/service_worker_cache_listener.h"
  22 #include "content/browser/service_worker/service_worker_script_cache_map.h"
  23 #include "content/common/content_export.h"
  24 #include "content/common/service_worker/service_worker_status_code.h"
  25 #include "content/common/service_worker/service_worker_types.h"
  26 #include "third_party/WebKit/public/platform/WebServiceWorkerEventResult.h"
  27
  28 class GURL;
  29
  30 namespace content {
  31
  32 class EmbeddedWorkerRegistry;
  33 class ServiceWorkerContextCore;
  34 class ServiceWorkerProviderHost;
  35 class ServiceWorkerRegistration;
  36 class ServiceWorkerVersionInfo;
  37
  38 // This class corresponds to a specific version of a ServiceWorker
  39 // script for a given pattern. When a script is upgraded, there may be
  40 // more than one ServiceWorkerVersion "running" at a time, but only
  41 // one of them is activated. This class connects the actual script with a
  42 // running worker.
  43 class CONTENT_EXPORT ServiceWorkerVersion
  44     : NON_EXPORTED_BASE(public base::RefCounted<ServiceWorkerVersion>),
  45       public EmbeddedWorkerInstance::Listener {
  46  public:
  47   typedef base::Callback<void(ServiceWorkerStatusCode)> StatusCallback;
  48   typedef base::Callback<void(ServiceWorkerStatusCode,
  49                               const IPC::Message& message)> MessageCallback;
  50   typedef base::Callback<void(ServiceWorkerStatusCode,
  51                               ServiceWorkerFetchEventResult,
  52                               const ServiceWorkerResponse&)> FetchCallback;
  53
  54   enum RunningStatus {
  55     STOPPED = EmbeddedWorkerInstance::STOPPED,
  56     STARTING = EmbeddedWorkerInstance::STARTING,
  57     RUNNING = EmbeddedWorkerInstance::RUNNING,
  58     STOPPING = EmbeddedWorkerInstance::STOPPING,
  59   };
  60
  61   // Current version status; some of the status (e.g. INSTALLED and ACTIVATED)
  62   // should be persisted unlike running status.
  63   enum Status {
  64     NEW,         // The version is just created.
  65     INSTALLING,  // Install event is dispatched and being handled.
  66     INSTALLED,   // Install event is finished and is ready to be activated.
  67     ACTIVATING,  // Activate event is dispatched and being handled.
  68     ACTIVATED,   // Activation is finished and can run as activated.
  69     REDUNDANT,   // The version is no longer running as activated, due to
  70                  // unregistration or replace.
  71   };
  72
  73   class Listener {
  74    public:
  75     virtual void OnWorkerStarted(ServiceWorkerVersion* version) {}
  76     virtual void OnWorkerStopped(ServiceWorkerVersion* version) {}
  77     virtual void OnVersionStateChanged(ServiceWorkerVersion* version) {}
  78     virtual void OnErrorReported(ServiceWorkerVersion* version,
  79                                  const base::string16& error_message,
  80                                  int line_number,
  81                                  int column_number,
  82                                  const GURL& source_url) {}
  83     virtual void OnReportConsoleMessage(ServiceWorkerVersion* version,
  84                                         int source_identifier,
  85                                         int message_level,
  86                                         const base::string16& message,
  87                                         int line_number,
  88                                         const GURL& source_url) {}
  89     // Fires when a version transitions from having a controllee to not.
  90     virtual void OnNoControllees(ServiceWorkerVersion* version) {}
  91
  92    protected:
  93     virtual ~Listener() {}
  94   };
  95
  96   ServiceWorkerVersion(
  97       ServiceWorkerRegistration* registration,
  98       const GURL& script_url,
  99       int64 version_id,
 100       base::WeakPtr<ServiceWorkerContextCore> context);
 101
 102   int64 version_id() const { return version_id_; }
 103   int64 registration_id() const { return registration_id_; }
 104   const GURL& script_url() const { return script_url_; }
 105   const GURL& scope() const { return scope_; }
 106   RunningStatus running_status() const {
 107     return static_cast<RunningStatus>(embedded_worker_->status());
 108   }
 109   ServiceWorkerVersionInfo GetInfo();
 110   Status status() const { return status_; }
 111
 112   // This sets the new status and also run status change callbacks
 113   // if there're any (see RegisterStatusChangeCallback).
 114   void SetStatus(Status status);
 115
 116   // Registers status change callback. (This is for one-off observation,
 117   // the consumer needs to re-register if it wants to continue observing
 118   // status changes)
 119   void RegisterStatusChangeCallback(const base::Closure& callback);
 120
 121   // Starts an embedded worker for this version.
 122   // This returns OK (success) if the worker is already running.
 123   void StartWorker(const StatusCallback& callback);
 124
 125   // Starts an embedded worker for this version.
 126   // |pause_after_download| notifies worker to pause after download finished
 127   // which could be resumed by EmbeddedWorkerInstance::ResumeAfterDownload.
 128   // This returns OK (success) if the worker is already running.
 129   void StartWorker(bool pause_after_download,
 130                    const StatusCallback& callback);
 131
 132   // Stops an embedded worker for this version.
 133   // This returns OK (success) if the worker is already stopped.
 134   void StopWorker(const StatusCallback& callback);
 135
 136   // Schedules an update to be run 'soon'.
 137   void ScheduleUpdate();
 138
 139   // If an update is scheduled but not yet started, this resets the timer
 140   // delaying the start time by a 'small' amount.
 141   void DeferScheduledUpdate();
 142
 143   // Starts an update now.
 144   void StartUpdate();
 145
 146   // Sends an IPC message to the worker.
 147   // If the worker is not running this first tries to start it by
 148   // calling StartWorker internally.
 149   // |callback| can be null if the sender does not need to know if the
 150   // message is successfully sent or not.
 151   void SendMessage(const IPC::Message& message, const StatusCallback& callback);
 152
 153   // Sends install event to the associated embedded worker and asynchronously
 154   // calls |callback| when it errors out or it gets response from the worker
 155   // to notify install completion.
 156   // |active_version_id| must be a valid positive ID
 157   // if there's an activated (previous) version running.
 158   //
 159   // This must be called when the status() is NEW. Calling this changes
 160   // the version's status to INSTALLING.
 161   // Upon completion, the version's status will be changed to INSTALLED
 162   // on success, or back to NEW on failure.
 163   void DispatchInstallEvent(int active_version_id,
 164                             const StatusCallback& callback);
 165
 166   // Sends activate event to the associated embedded worker and asynchronously
 167   // calls |callback| when it errors out or it gets response from the worker
 168   // to notify activation completion.
 169   //
 170   // This must be called when the status() is INSTALLED. Calling this changes
 171   // the version's status to ACTIVATING.
 172   // Upon completion, the version's status will be changed to ACTIVATED
 173   // on success, or back to INSTALLED on failure.
 174   void DispatchActivateEvent(const StatusCallback& callback);
 175
 176   // Sends fetch event to the associated embedded worker and calls
 177   // |callback| with the response from the worker.
 178   //
 179   // This must be called when the status() is ACTIVATED. Calling this in other
 180   // statuses will result in an error SERVICE_WORKER_ERROR_FAILED.
 181   void DispatchFetchEvent(const ServiceWorkerFetchRequest& request,
 182                           const base::Closure& prepare_callback,
 183                           const FetchCallback& fetch_callback);
 184
 185   // Sends sync event to the associated embedded worker and asynchronously calls
 186   // |callback| when it errors out or it gets response from the worker to notify
 187   // completion.
 188   //
 189   // This must be called when the status() is ACTIVATED.
 190   void DispatchSyncEvent(const StatusCallback& callback);
 191
 192   // Sends push event to the associated embedded worker and asynchronously calls
 193   // |callback| when it errors out or it gets response from the worker to notify
 194   // completion.
 195   //
 196   // This must be called when the status() is ACTIVATED.
 197   void DispatchPushEvent(const StatusCallback& callback,
 198                          const std::string& data);
 199
 200   // Adds and removes |provider_host| as a controllee of this ServiceWorker.
 201   // A potential controllee is a host having the version as its .installing
 202   // or .waiting version.
 203   void AddControllee(ServiceWorkerProviderHost* provider_host);
 204   void RemoveControllee(ServiceWorkerProviderHost* provider_host);
 205
 206   // Returns if it has controllee.
 207   bool HasControllee() const { return !controllee_map_.empty(); }
 208
 209   // Adds and removes Listeners.
 210   void AddListener(Listener* listener);
 211   void RemoveListener(Listener* listener);
 212
 213   ServiceWorkerScriptCacheMap* script_cache_map() { return &script_cache_map_; }
 214   EmbeddedWorkerInstance* embedded_worker() { return embedded_worker_.get(); }
 215
 216   // Dooms this version to have REDUNDANT status and its resources deleted.  If
 217   // the version is controlling a page, these changes will happen when the
 218   // version no longer controls any pages.
 219   void Doom();
 220   bool is_doomed() const { return is_doomed_; }
 221
 222  private:
 223   friend class base::RefCounted<ServiceWorkerVersion>;
 224   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerControlleeRequestHandlerTest,
 225                            ActivateWaitingVersion);
 226   typedef ServiceWorkerVersion self;
 227   typedef std::map<ServiceWorkerProviderHost*, int> ControlleeMap;
 228   typedef IDMap<ServiceWorkerProviderHost> ControlleeByIDMap;
 229   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerVersionTest, ScheduleStopWorker);
 230
 231   virtual ~ServiceWorkerVersion();
 232
 233   // EmbeddedWorkerInstance::Listener overrides:
 234   virtual void OnStarted() OVERRIDE;
 235   virtual void OnStopped() OVERRIDE;
 236   virtual void OnReportException(const base::string16& error_message,
 237                                  int line_number,
 238                                  int column_number,
 239                                  const GURL& source_url) OVERRIDE;
 240   virtual void OnReportConsoleMessage(int source_identifier,
 241                                       int message_level,
 242                                       const base::string16& message,
 243                                       int line_number,
 244                                       const GURL& source_url) OVERRIDE;
 245   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 246
 247   void RunStartWorkerCallbacksOnError(ServiceWorkerStatusCode status);
 248
 249   void DispatchInstallEventAfterStartWorker(int active_version_id,
 250                                             const StatusCallback& callback);
 251   void DispatchActivateEventAfterStartWorker(const StatusCallback& callback);
 252
 253   // Message handlers.
 254   void OnGetClientDocuments(int request_id);
 255   void OnActivateEventFinished(int request_id,
 256                                blink::WebServiceWorkerEventResult result);
 257   void OnInstallEventFinished(int request_id,
 258                               blink::WebServiceWorkerEventResult result);
 259   void OnFetchEventFinished(int request_id,
 260                             ServiceWorkerFetchEventResult result,
 261                             const ServiceWorkerResponse& response);
 262   void OnSyncEventFinished(int request_id);
 263   void OnPushEventFinished(int request_id);
 264   void OnPostMessageToDocument(int client_id,
 265                                const base::string16& message,
 266                                const std::vector<int>& sent_message_port_ids);
 267
 268   void ScheduleStopWorker();
 269   void DoomInternal();
 270
 271   const int64 version_id_;
 272   int64 registration_id_;
 273   GURL script_url_;
 274   GURL scope_;
 275   Status status_;
 276   scoped_ptr<EmbeddedWorkerInstance> embedded_worker_;
 277   scoped_ptr<ServiceWorkerCacheListener> cache_listener_;
 278   std::vector<StatusCallback> start_callbacks_;
 279   std::vector<StatusCallback> stop_callbacks_;
 280   std::vector<base::Closure> status_change_callbacks_;
 281
 282   // Message callbacks.
 283   IDMap<StatusCallback, IDMapOwnPointer> activate_callbacks_;
 284   IDMap<StatusCallback, IDMapOwnPointer> install_callbacks_;
 285   IDMap<FetchCallback, IDMapOwnPointer> fetch_callbacks_;
 286   IDMap<StatusCallback, IDMapOwnPointer> sync_callbacks_;
 287   IDMap<StatusCallback, IDMapOwnPointer> push_callbacks_;
 288
 289   ControlleeMap controllee_map_;
 290   ControlleeByIDMap controllee_by_id_;
 291   base::WeakPtr<ServiceWorkerContextCore> context_;
 292   ObserverList<Listener> listeners_;
 293   ServiceWorkerScriptCacheMap script_cache_map_;
 294   base::OneShotTimer<ServiceWorkerVersion> stop_worker_timer_;
 295   base::OneShotTimer<ServiceWorkerVersion> update_timer_;
 296   bool is_doomed_;
 297
 298   base::WeakPtrFactory<ServiceWorkerVersion> weak_factory_;
 299
 300   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerVersion);
 301 };
 302
 303 }  // namespace content
 304
 305 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_