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_EXTENSIONS_API_MDNS_MDNS_API_H_ 6 #define CHROME_BROWSER_EXTENSIONS_API_MDNS_MDNS_API_H_ 7 8 #include <set> 9 #include <string> 10 11 #include "base/memory/scoped_ptr.h" 12 #include "base/threading/thread_checker.h" 13 #include "chrome/browser/extensions/api/mdns/dns_sd_registry.h" 14 #include "chrome/browser/extensions/api/profile_keyed_api_factory.h" 15 #include "extensions/browser/event_router.h" 16 17 namespace extensions { 18 19 class DnsSdRegistry; 20 21 // MDnsAPI is instantiated with the profile and will listen for extensions that 22 // register listeners for the chrome.mdns extension API. It will use a registry 23 // class to start the mDNS listener process (if necessary) and observe new 24 // service events to dispatch them to registered extensions. 25 class MDnsAPI : public ProfileKeyedAPI, 26 public EventRouter::Observer, 27 public DnsSdRegistry::DnsSdObserver { 28 public: 29 explicit MDnsAPI(Profile* profile); 30 virtual ~MDnsAPI(); 31 32 static MDnsAPI* Get(Profile* profile); 33 34 // ProfileKeyedAPI implementation. 35 static ProfileKeyedAPIFactory<MDnsAPI>* GetFactoryInstance(); 36 37 // Used to mock out the DnsSdRegistry for testing. 38 void SetDnsSdRegistryForTesting(scoped_ptr<DnsSdRegistry> registry); 39 40 protected: 41 // Retrieve an instance of the registry. Lazily created when needed. 42 virtual DnsSdRegistry* dns_sd_registry(); 43 44 private: 45 friend class ProfileKeyedAPIFactory<MDnsAPI>; 46 47 // EventRouter::Observer: 48 virtual void OnListenerAdded(const EventListenerInfo& details) OVERRIDE; 49 virtual void OnListenerRemoved(const EventListenerInfo& details) OVERRIDE; 50 51 // DnsSdRegistry::Observer 52 virtual void OnDnsSdEvent( 53 const std::string& service_type, 54 const DnsSdRegistry::DnsSdServiceList& services) OVERRIDE; 55 56 // ProfileKeyedAPI implementation. 57 static const char* service_name() { 58 return "MDnsAPI"; 59 } 60 61 static const bool kServiceIsCreatedWithBrowserContext = true; 62 static const bool kServiceIsNULLWhileTesting = true; 63 64 // Update the current list of service types and update the registry. 65 void UpdateMDnsListeners(const EventListenerInfo& details); 66 67 // Ensure methods are only called on UI thread. 68 base::ThreadChecker thread_checker_; 69 Profile* const profile_; 70 // Lazily created on first access and destroyed with this API class. 71 scoped_ptr<DnsSdRegistry> dns_sd_registry_; 72 // Current set of service types registered with the registry. 73 std::set<std::string> service_types_; 74 75 DISALLOW_COPY_AND_ASSIGN(MDnsAPI); 76 }; 77 78 } // namespace extensions 79 80 #endif // CHROME_BROWSER_EXTENSIONS_API_MDNS_MDNS_API_H_ 81
