src/chrome/browser/local_discovery/service_discovery_device_lister.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 CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_DEVICE_LISTER_H_
   6 #define CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_DEVICE_LISTER_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/memory/linked_ptr.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "chrome/common/local_discovery/service_discovery_client.h"
  15
  16 namespace local_discovery {
  17
  18 class ServiceDiscoveryDeviceLister {
  19  public:
  20   class Delegate {
  21    public:
  22     virtual void OnDeviceChanged(
  23         bool added,
  24         const ServiceDescription& service_description) = 0;
  25     virtual void OnDeviceRemoved(const std::string& service_name) = 0;
  26     virtual void OnDeviceCacheFlushed() = 0;
  27   };
  28
  29   ServiceDiscoveryDeviceLister(Delegate* delegate,
  30                                ServiceDiscoveryClient* service_discovery_client,
  31                                const std::string& service_type);
  32   virtual ~ServiceDiscoveryDeviceLister();
  33
  34   void Start();
  35   void DiscoverNewDevices(bool force_update);
  36
  37   std::string service_type() { return service_type_; }
  38
  39  private:
  40   typedef std::map<std::string, linked_ptr<ServiceResolver> >
  41      ServiceResolverMap;
  42
  43   void OnServiceUpdated(ServiceWatcher::UpdateType update,
  44                         const std::string& service_name);
  45
  46   void OnResolveComplete(
  47       bool added,
  48       std::string service_name,
  49       ServiceResolver::RequestStatus status,
  50       const ServiceDescription& description);
  51
  52   // Create or recreate the service watcher
  53   void CreateServiceWatcher();
  54
  55   Delegate* const delegate_;
  56   ServiceDiscoveryClient* const service_discovery_client_;
  57   const std::string service_type_;
  58
  59   scoped_ptr<ServiceWatcher> service_watcher_;
  60   ServiceResolverMap resolvers_;
  61
  62   base::WeakPtrFactory<ServiceDiscoveryDeviceLister> weak_factory_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(ServiceDiscoveryDeviceLister);
  65 };
  66
  67 }  // namespace local_discovery
  68
  69 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_DEVICE_LISTER_H_