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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 #ifndef CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_NETWORK_PROVIDER_IMPL_H_
      6 #define CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_NETWORK_PROVIDER_IMPL_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   virtual ~ServiceWorkerNetworkProvider();
     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_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_
     59