Linux pairing registry delegate implementation

remoting/host/pairing_registry_delegate_linux.h

+// 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 REMOTING_PROTOCOL_PAIRING_REGISTRY_DELEGATE_LINUX_H_
+#define REMOTING_PROTOCOL_PAIRING_REGISTRY_DELEGATE_LINUX_H_
+
+#include "remoting/protocol/pairing_registry.h"
+
+#include "base/files/file_path.h"
+#include "base/memory/weak_ptr.h"
+
+namespace base {
+class ListValue;
+class TaskRunner;
+}  // namespace base
+
+namespace remoting {
+
+class PairingRegistryDelegateLinux
+    : public protocol::PairingRegistry::Delegate {
+ public:
+  explicit PairingRegistryDelegateLinux(
+      scoped_refptr<base::TaskRunner> task_runner);
+  virtual ~PairingRegistryDelegateLinux();
+
+  // PairingRegistry::Delegate interface
+  virtual void Save(
+      const std::string& pairings_json,
+      const protocol::PairingRegistry::SaveCallback& callback) OVERRIDE;
+  virtual void Load(
+      const protocol::PairingRegistry::LoadCallback& callback) OVERRIDE;
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(PairingRegistryDelegateLinuxTest, SaveAndLoad);
+
+  // Blocking helper methods run using the TaskRunner passed to the ctor.
+  void DoSave(const std::string& pairings_json,
+              const protocol::PairingRegistry::SaveCallback& callback);
+  void DoLoad(const protocol::PairingRegistry::LoadCallback& callback);
+
+  // Run the delegate callbacks on their original thread.
+  static void RunSaveCallbackOnThread(
+      scoped_refptr<base::TaskRunner> task_runner,
+      const protocol::PairingRegistry::SaveCallback& callback,
+      bool success);
+  static void RunLoadCallbackOnThread(
+      scoped_refptr<base::TaskRunner> task_runner,
+      const protocol::PairingRegistry::LoadCallback& callback,
+      const std::string& pairings_json);
+
+  // Helper methods to load and save the pairing registry.
+  protocol::PairingRegistry::PairedClients LoadPairings();
+  void SavePairings(
+      const protocol::PairingRegistry::PairedClients& paired_clients);
+
+  // Return the path to the file to use for loading and saving paired clients.
+  base::FilePath GetRegistryFilePath();
+
+  // For testing purposes, set the path returned by |GetRegistryFilePath|.
+  void SetFilenameForTesting(const base::FilePath &filename);
+
+  scoped_refptr<base::TaskRunner> task_runner_;
+  base::FilePath filename_for_testing_;
+
+  base::WeakPtrFactory<PairingRegistryDelegateLinux> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PairingRegistryDelegateLinux);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_PAIRING_REGISTRY_DELEGATE_LINUX_H_