src/content/child/service_worker/service_worker_network_provider.h

   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 #ifndef CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_NETWORK_PROVIDER_H_
   6 #define CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_NETWORK_PROVIDER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/supports_user_data.h"
  12 #include "content/common/content_export.h"
  13
  14 namespace content {
  15
  16 class ServiceWorkerProviderContext;
  17
  18 // A unique provider_id is generated for each instance.
  19 // Instantiated prior to the main resource load being started and remains
  20 // allocated until after the last subresource load has occurred.
  21 // This is used to track the lifetime of a Document to create
  22 // and dispose the ServiceWorkerProviderHost in the browser process
  23 // to match its lifetime. Each request coming from the Document is
  24 // tagged with this id in willSendRequest.
  25 //
  26 // Basically, it's a scoped integer that sends an ipc upon construction
  27 // and destruction.
  28 class CONTENT_EXPORT ServiceWorkerNetworkProvider
  29     : public base::SupportsUserData::Data {
  30  public:
  31   // Ownership is transferred to the DocumentState.
  32   static void AttachToDocumentState(
  33       base::SupportsUserData* document_state,
  34       scoped_ptr<ServiceWorkerNetworkProvider> network_provider);
  35
  36   static ServiceWorkerNetworkProvider* FromDocumentState(
  37       base::SupportsUserData* document_state);
  38
  39   ServiceWorkerNetworkProvider();
  40   ~ServiceWorkerNetworkProvider() override;
  41
  42   int provider_id() const { return provider_id_; }
  43   ServiceWorkerProviderContext* context() { return context_.get(); }
  44
  45   // This method is called for a provider that's associated with a
  46   // running service worker script. The version_id indicates which
  47   // ServiceWorkerVersion should be used.
  48   void SetServiceWorkerVersionId(int64 version_id);
  49
  50  private:
  51   const int provider_id_;
  52   scoped_refptr<ServiceWorkerProviderContext> context_;
  53   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerNetworkProvider);
  54 };
  55
  56 }  // namespace content
  57
  58 #endif  // CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_NETWORK_PROVIDER_H_