Separate singleton out of ChromotingJNIInstance

remoting/client/jni/chromoting_jni.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_CLIENT_JNI_CHROMOTING_JNI_H_
+#define REMOTING_CLIENT_JNI_CHROMOTING_JNI_H_
+
+#include <jni.h>
+
+#include "base/at_exit.h"
+#include "net/url_request/url_request_context_getter.h"
+#include "remoting/base/auto_thread.h"
+#include "remoting/protocol/connection_to_host.h"
+
+template<typename T> struct DefaultSingletonTraits;
+
+namespace remoting {
+class ChromotingJNIInstance;
+
+// Class and package name of the Java class supporting the methods we call.
+const char* const JAVA_CLASS = "org/chromium/chromoting/jni/JNIInterface";
+
+// Houses the global resources on which the Chromoting components run
+// (e.g. message loops and task runners). Proxies outgoing JNI calls from its
+// ChromotingJNIInstance member to Java. All its methods should be invoked
+// exclusively from the UI thread.
+class ChromotingJNI {
+ public:
+  // This class is instantiated at process initialization and persists until
+  // we close. Its components are reused across |ChromotingJNIInstance|s.
+  static ChromotingJNI* GetInstance();
+
+  scoped_refptr<AutoThreadTaskRunner> ui_task_runner() {
+    return ui_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> network_task_runner() {
+    return network_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> display_task_runner() {
+    return display_task_runner_;
+  }
+
+  scoped_refptr<net::URLRequestContextGetter> url_requester() {
+    return url_requester_;
+  }
+
+  // Initiates a connection with the specified host. Must only be called when
+  // |session| is null (i.e. before any other call to Connect() or following
+  // a call to Disconnect()).
+  void ConnectToHost(const char* username,
+               const char* auth_token,

[garykac, 2013/07/15 21:13:42]

align args

[solb, 2013/07/15 21:49:42]

Done.

+               const char* host_jid,
+               const char* host_id,
+               const char* host_pubkey);
+
+  // Terminates any ongoing connection attempt and cleans up by nullifying
+  // |session|. This is a no-op unless |session| is currently non-null.
+  void DisconnectFromHost();
+
+  // Returns the client for the currently-active session, or null if no
+  // connection attempt has been initiated.
+  scoped_refptr<ChromotingJNIInstance> session() {
+    return session_;
+  }
+
+  // Notifies the user that the connection status has changed.
+  void ReportConnectionStatus(protocol::ConnectionToHost::State state,
+                              protocol::ErrorCode error);
+
+  // Pops up a dialog box asking the user to enter a PIN.
+  void DisplayAuthenticationPrompt();
+
+ private:
+  ChromotingJNI();
+
+  // Forces a Disconnect() in case there is any active or failed connection,
+  // then proceeds to tear down the Chromium
+  // DisconnectFromHost() before this singleton is destroyed. Because

[garykac, 2013/07/15 21:13:42]

Chromium DisconnectFromHost?

[solb, 2013/07/15 21:49:42]

Find-and-replace fail. Thanks for finding it!

+  // destruction only occurs at application exit after all connections have
+  // terminated, it is safe to make unretained cross-thread calls on the class.
+  virtual ~ChromotingJNI();
+
+  // Reference to the Java class into which we make JNI calls.
+  jclass class_;
+
+  // Used by the Chromium libraries to clean up the base and net libraries' JNI
+  // bindings. It must persist for the lifetime of the singleton.
+  scoped_ptr<base::AtExitManager> collector_;
+
+  // Chromium code's connection to the Java message loop.
+  scoped_ptr<base::MessageLoopForUI> ui_loop_;
+
+  // Runners that allow posting tasks to the various native threads.
+  scoped_refptr<AutoThreadTaskRunner> ui_task_runner_;
+  scoped_refptr<AutoThreadTaskRunner> network_task_runner_;
+  scoped_refptr<AutoThreadTaskRunner> display_task_runner_;
+
+  scoped_refptr<net::URLRequestContextGetter> url_requester_;
+
+  // Contains all connection-specific state.
+  scoped_refptr<ChromotingJNIInstance> session_;
+
+  friend struct DefaultSingletonTraits<ChromotingJNI>;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromotingJNI);
+};
+
+}  // namespace remoting
+
+#endif