[Chromoting] The daemon process now starts the networking process and passes the host configuration…

remoting/host/daemon_process.h

 // Copyright (c) 2012 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_HOST_DAEMON_PROCESS_H_
 #define REMOTING_HOST_DAEMON_PROCESS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "remoting/base/stoppable.h"
+#include "remoting/host/daemon_config_watcher.h"
+#include "remoting/host/worker_process_delegate.h"
+
+class FilePath;
 
 namespace base {
 class SingleThreadTaskRunner;
-class Thread;
 }  // namespace base
 
-namespace IPC {
-class Message;
-} // namespace IPC
-
 namespace remoting {
 
 // This class implements core of the daemon process. It manages the networking
 // process running at lower privileges and maintains the list of virtual
 // terminals.
-class DaemonProcess : public Stoppable, public IPC::Listener {
+class DaemonProcess
+    : public Stoppable,
+      public DaemonConfigWatcher::Delegate,
+      public WorkerProcessDelegate {
  public:
   virtual ~DaemonProcess();
 
   // Creates a platform-specific implementation of the daemon process object.
   static scoped_ptr<DaemonProcess> Create(
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
       const base::Closure& stopped_callback);
 
-  // IPC::Listener implementation.
+  // DaemonConfigWatcher::Delegate
+  virtual void OnConfigUpdated(const std::string& config) OVERRIDE;
+  virtual void OnConfigWatcherError() OVERRIDE;
+
+  // WorkerProcessDelegate implementation.
+  virtual void OnChannelConnected() OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  // Sends an IPC message to the worker process. The message will be dropped
+  // unless the network process is connected over the IPC channel.
+  virtual void Send(IPC::Message* message) = 0;
+
  protected:
   DaemonProcess(scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
                 scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
                 const base::Closure& stopped_callback);
 
   // Reads the host configuration and launches the networking process.
-  void Init();
+  void Initialize();
 
   // Stoppable implementation.
   virtual void DoStop() OVERRIDE;
 
   // Launches the network process and establishes an IPC channel with it.
-  virtual bool LaunchNetworkProcess() = 0;
+  virtual void LaunchNetworkProcess() = 0;
+
+  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner() {
+    return main_task_runner_;
+  }
+
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner() {
+    return io_task_runner_;
+  }
 
  private:
+  // Called every time the host configuration file is updated.
+  void ConfigUpdated(const FilePath& path, bool error);
+
+  // Reads the configuration file and passes it to the |main_task_runner_|
+  // thread.
+  void ReloadConfig();
+
+  // Sends |config| to the network process.
+  void SendConfig(const std::string& config);
+
+  // Starts monitoring the configuration file updates.
+  void StartConfigWatcher();
+
+  // Stops monitoring the configuration file updates.
+  void StopConfigWatcher();
+
+  // Notifies the |main_task_runner_| thread that the configuration file watcher
+  // has been fully stopped.
+  void StopConfigWatcherCompleted();
+
+  // The configuration file contents.
+  std::string config_;
+
+  scoped_ptr<DaemonConfigWatcher> config_watcher_;
+
+  enum ConfigWatcherState {
+    kConfigWatcherUninitialized,
+    kConfigWatcherRunning,
+    kConfigWatcherStopping,
+    kConfigWatcherStopped
+  };
+
+  ConfigWatcherState config_watcher_state_;
+
   // The main task runner. Typically it is the UI message loop.
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   // Handles IPC and background I/O tasks.
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
-  // The IPC channel connecting the daemon process to the networking process.
-  scoped_ptr<IPC::ChannelProxy> network_process_channel_;
+  // WeakPtr used to avoid tasks accessing |this| after it is deleted.
+  base::WeakPtrFactory<DaemonProcess> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DaemonProcess);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_DAEMON_PROCESS_H_