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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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_
      6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/memory/ref_counted.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "base/memory/weak_ptr.h"
     12 #include "content/browser/service_worker/service_worker_version.h"
     13 #include "content/common/content_export.h"
     14 #include "content/common/service_worker/service_worker_types.h"
     15 
     16 namespace IPC {
     17 class Sender;
     18 }
     19 
     20 namespace content {
     21 
     22 class ServiceWorkerContextCore;
     23 class ServiceWorkerRegistration;
     24 
     25 // Roughly corresponds to one ServiceWorker object in the renderer process
     26 // (WebServiceWorkerImpl).
     27 // Has references to the corresponding ServiceWorkerVersion and
     28 // ServiceWorkerRegistration (therefore they're guaranteed to be alive while
     29 // this handle is around).
     30 class CONTENT_EXPORT ServiceWorkerHandle
     31     : NON_EXPORTED_BASE(public ServiceWorkerVersion::Listener) {
     32  public:
     33   // Creates a handle for a live version. The version's corresponding
     34   // registration must be also alive.
     35   // This may return NULL if |context|.get() or |version| is NULL.
     36   // |sender| and |thread_id| will be used to send messages to the
     37   // corresponding WebServiceWorkerImpl (which should live on |thread_id|
     38   // in the child process).
     39   static scoped_ptr<ServiceWorkerHandle> Create(
     40       base::WeakPtr<ServiceWorkerContextCore> context,
     41       IPC::Sender* sender,
     42       int thread_id,
     43       int provider_id,
     44       ServiceWorkerVersion* version);
     45 
     46   ServiceWorkerHandle(base::WeakPtr<ServiceWorkerContextCore> context,
     47                       IPC::Sender* sender,
     48                       int thread_id,
     49                       int provider_id,
     50                       ServiceWorkerRegistration* registration,
     51                       ServiceWorkerVersion* version);
     52   virtual ~ServiceWorkerHandle();
     53 
     54   // ServiceWorkerVersion::Listener overrides.
     55   virtual void OnWorkerStarted(ServiceWorkerVersion* version) OVERRIDE;
     56   virtual void OnWorkerStopped(ServiceWorkerVersion* version) OVERRIDE;
     57   virtual void OnErrorReported(ServiceWorkerVersion* version,
     58                                const base::string16& error_message,
     59                                int line_number,
     60                                int column_number,
     61                                const GURL& source_url) OVERRIDE;
     62   virtual void OnReportConsoleMessage(ServiceWorkerVersion* version,
     63                                       int source_identifier,
     64                                       int message_level,
     65                                       const base::string16& message,
     66                                       int line_number,
     67                                       const GURL& source_url) OVERRIDE;
     68   virtual void OnVersionStateChanged(ServiceWorkerVersion* version) OVERRIDE;
     69 
     70   ServiceWorkerObjectInfo GetObjectInfo();
     71 
     72   int thread_id() const { return thread_id_; }
     73   int provider_id() const { return provider_id_; }
     74   int handle_id() const { return handle_id_; }
     75   ServiceWorkerRegistration* registration() { return registration_.get(); }
     76   ServiceWorkerVersion* version() { return version_.get(); }
     77 
     78   bool HasNoRefCount() const { return ref_count_ <= 0; }
     79   void IncrementRefCount();
     80   void DecrementRefCount();
     81 
     82  private:
     83   base::WeakPtr<ServiceWorkerContextCore> context_;
     84   IPC::Sender* sender_;  // Not owned, it should always outlive this.
     85   const int thread_id_;
     86   const int provider_id_;
     87   const int handle_id_;
     88   int ref_count_;  // Created with 1.
     89   scoped_refptr<ServiceWorkerRegistration> registration_;
     90   scoped_refptr<ServiceWorkerVersion> version_;
     91 
     92   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerHandle);
     93 };
     94 
     95 }  // namespace content
     96 
     97 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_
     98