content/browser/cache_storage/cache_storage_dispatcher_host.h

   1 // Copyright 2015 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_CACHE_STORAGE_CACHE_STORAGE_DISPATCHER_HOST_H_
   6 #define CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_DISPATCHER_HOST_H_
   7
   8 #include "content/public/browser/browser_message_filter.h"
   9
  10 namespace content {
  11
  12 class CacheStorageContextImpl;
  13 class CacheStorageListener;
  14
  15 // Handles Cache Storage related messages sent to the browser process from
  16 // child processes. One host instance exists per child process. All
  17 // messages are processed on the IO thread. Currently, all messages are
  18 // passed directly to the owned CacheStorageListener instance, which
  19 // in turn dispatches calls to the CacheStorageManager owned
  20 // by the CacheStorageContextImpl for the entire browsing context.
  21 // TODO(jsbell): Merge this with CacheStorageListener crbug.com/439389
  22 class CONTENT_EXPORT CacheStorageDispatcherHost : public BrowserMessageFilter {
  23  public:
  24   CacheStorageDispatcherHost();
  25
  26   // Runs on UI thread.
  27   void Init(CacheStorageContextImpl* context);
  28
  29   // BrowserMessageFilter implementation
  30   void OnDestruct() const override;
  31   bool OnMessageReceived(const IPC::Message& message) override;
  32
  33  private:
  34   // Friends to allow OnDestruct() delegation
  35   friend class BrowserThread;
  36   friend class base::DeleteHelper<CacheStorageDispatcherHost>;
  37
  38   ~CacheStorageDispatcherHost() override;
  39
  40   // Called by Init() on IO thread.
  41   void CreateCacheListener(CacheStorageContextImpl* context);
  42
  43   scoped_ptr<CacheStorageListener> cache_listener_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(CacheStorageDispatcherHost);
  46 };
  47
  48 }  // namespace content
  49
  50 #endif  // CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_DISPATCHER_HOST_H_