Initial chrome.mdns API.
BUG=280900
TBR=erg
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=221619
Review URL: https://chromiumcodereview.appspot.com/23437015
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221738 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/api/mdns/mdns_api.h b/chrome/browser/extensions/api/mdns/mdns_api.h
new file mode 100644
index 0000000..851e0b9
--- /dev/null
+++ b/chrome/browser/extensions/api/mdns/mdns_api.h
@@ -0,0 +1,80 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_MDNS_MDNS_API_H_
+#define CHROME_BROWSER_EXTENSIONS_API_MDNS_MDNS_API_H_
+
+#include <set>
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "chrome/browser/extensions/api/mdns/dns_sd_registry.h"
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
+#include "chrome/browser/extensions/event_router.h"
+
+namespace extensions {
+
+class DnsSdRegistry;
+
+// MDnsAPI is instantiated with the profile and will listen for extensions that
+// register listeners for the chrome.mdns extension API. It will use a registry
+// class to start the mDNS listener process (if necessary) and observe new
+// service events to dispatch them to registered extensions.
+class MDnsAPI : public ProfileKeyedAPI,
+ public EventRouter::Observer,
+ public DnsSdRegistry::DnsSdObserver {
+ public:
+ explicit MDnsAPI(Profile* profile);
+ virtual ~MDnsAPI();
+
+ static MDnsAPI* Get(Profile* profile);
+
+ // ProfileKeyedAPI implementation.
+ static ProfileKeyedAPIFactory<MDnsAPI>* GetFactoryInstance();
+
+ // Used to mock out the DnsSdRegistry for testing.
+ void SetDnsSdRegistryForTesting(scoped_ptr<DnsSdRegistry> registry);
+
+ protected:
+ // Retrieve an instance of the registry. Lazily created when needed.
+ virtual DnsSdRegistry* dns_sd_registry();
+
+ private:
+ friend class ProfileKeyedAPIFactory<MDnsAPI>;
+
+ // EventRouter::Observer:
+ virtual void OnListenerAdded(const EventListenerInfo& details) OVERRIDE;
+ virtual void OnListenerRemoved(const EventListenerInfo& details) OVERRIDE;
+
+ // DnsSdRegistry::Observer
+ virtual void OnDnsSdEvent(
+ const std::string& service_type,
+ const DnsSdRegistry::DnsSdServiceList& services) OVERRIDE;
+
+ // ProfileKeyedAPI implementation.
+ static const char* service_name() {
+ return "MDnsAPI";
+ }
+
+ static const bool kServiceIsCreatedWithBrowserContext = true;
+ static const bool kServiceIsNULLWhileTesting = true;
+
+ // Update the current list of service types and update the registry.
+ void UpdateMDnsListeners(const EventListenerInfo& details);
+
+ // Ensure methods are only called on UI thread.
+ base::ThreadChecker thread_checker_;
+ Profile* const profile_;
+ // Lazily created on first access and destroyed with this API class.
+ scoped_ptr<DnsSdRegistry> dns_sd_registry_;
+ // Current set of service types registered with the registry.
+ std::set<std::string> service_types_;
+
+ DISALLOW_COPY_AND_ASSIGN(MDnsAPI);
+};
+
+} // namespace extensions
+
+#endif // CHROME_BROWSER_EXTENSIONS_API_MDNS_MDNS_API_H_
