content/browser/service_worker/service_worker_registration.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_REGISTRATION_H_
   6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/gtest_prod_util.h"
  10 #include "base/logging.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "content/browser/service_worker/service_worker_version.h"
  14 #include "content/common/content_export.h"
  15 #include "url/gurl.h"
  16
  17 namespace content {
  18
  19 class ServiceWorkerVersion;
  20
  21 // This class manages all persistence of service workers:
  22 //  - Registrations
  23 //  - Mapping of caches to registrations / versions
  24 //
  25 // This is the place where we manage simultaneous
  26 // requests for the same registrations and caches, making sure that
  27 // two pages that are registering the same pattern at the same time
  28 // have their registrations coalesced rather than overwriting each
  29 // other.
  30 //
  31 // This class also manages the state of the upgrade process, which
  32 // includes managing which ServiceWorkerVersion is "active" vs "in
  33 // waiting" (or "pending")
  34 class CONTENT_EXPORT ServiceWorkerRegistration
  35     : NON_EXPORTED_BASE(public base::RefCounted<ServiceWorkerRegistration>) {
  36  public:
  37   ServiceWorkerRegistration(const GURL& pattern,
  38                             const GURL& script_url,
  39                             int64 registration_id);
  40
  41   void Shutdown();
  42   bool is_shutdown() const { return is_shutdown_; }
  43
  44   int64 id() const { return registration_id_; }
  45   const GURL& script_url() const { return script_url_; }
  46   const GURL& pattern() const { return pattern_; }
  47
  48   int64 next_version_id() { return next_version_id_++; }
  49
  50   ServiceWorkerVersion* active_version() const {
  51     DCHECK(!is_shutdown_);
  52     return active_version_.get();
  53   }
  54
  55   ServiceWorkerVersion* pending_version() const {
  56     DCHECK(!is_shutdown_);
  57     return pending_version_.get();
  58   }
  59
  60   void set_active_version(ServiceWorkerVersion* version) {
  61     DCHECK(!is_shutdown_);
  62     active_version_ = version;
  63   }
  64
  65   void set_pending_version(ServiceWorkerVersion* version) {
  66     DCHECK(!is_shutdown_);
  67     pending_version_ = version;
  68   }
  69
  70   // The final synchronous switchover after all events have been
  71   // fired, and the old "active version" is being shut down.
  72   void ActivatePendingVersion();
  73
  74  private:
  75   ~ServiceWorkerRegistration();
  76   friend class base::RefCounted<ServiceWorkerRegistration>;
  77
  78   const GURL pattern_;
  79   const GURL script_url_;
  80   const int64 registration_id_;
  81   int64 next_version_id_;
  82
  83   scoped_refptr<ServiceWorkerVersion> active_version_;
  84   scoped_refptr<ServiceWorkerVersion> pending_version_;
  85
  86   bool is_shutdown_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
  89 };
  90 }  // namespace content
  91 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_