Separate singleton out of ChromotingJNIInstance

remoting/client/jni/chromoting_jni.cc

+// 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.
+
+#include "remoting/client/jni/chromoting_jni.h"
+
+#include "base/android/base_jni_registrar.h"
+#include "base/android/jni_android.h"
+#include "base/memory/singleton.h"
+#include "net/android/net_jni_registrar.h"
+#include "remoting/base/url_request_context.h"
+#include "remoting/client/jni/chromoting_jni_instance.h"
+
+namespace {
+// Class and package name of the Java class supporting the methods we call.
+const char* const JAVA_CLASS = "org/chromium/chromoting/jni/JNIInterface";
+}  // namespace
+
+namespace remoting {
+
+// static
+ChromotingJni* ChromotingJni::GetInstance() {
+  return Singleton<ChromotingJni>::get();
+}
+
+ChromotingJni::ChromotingJni() {
+  // Obtain a reference to the Java environment. (Future calls to this function
+  // made from the same thread return the same stored reference instead of
+  // repeating the work of attaching to the JVM.)
+  JNIEnv* env = base::android::AttachCurrentThread();
+
+  // The base and networks stacks must be registered with JNI in order to work
+  // on Android. An AtExitManager cleans this up at process exit.
+  at_exit_manager_.reset(new base::AtExitManager());
+  base::android::RegisterJni(env);
+  net::android::RegisterJni(env);
+
+  // On Android, the UI thread is managed by Java, so we need to attach and
+  // start a special type of message loop to allow Chromium code to run tasks.
+  LOG(INFO) << "Starting main message loop";
+  ui_loop_.reset(new base::MessageLoopForUI());
+  ui_loop_->Start();
+
+  LOG(INFO) << "Spawning additional threads";
+  // TODO(solb) Stop pretending to control the managed UI thread's lifetime.
+  ui_task_runner_ = new AutoThreadTaskRunner(ui_loop_->message_loop_proxy(),
+                                             base::MessageLoop::QuitClosure());
+  network_task_runner_ = AutoThread::CreateWithType("native_net",
+                                                    ui_task_runner_,
+                                                    base::MessageLoop::TYPE_IO);
+  display_task_runner_ = AutoThread::Create("native_disp",
+                                            ui_task_runner_);
+
+  url_requester_ = new URLRequestContextGetter(ui_task_runner_,
+                                               network_task_runner_);
+
+  class_ = static_cast<jclass>(env->NewGlobalRef(env->FindClass(JAVA_CLASS)));
+}
+
+ChromotingJni::~ChromotingJni() {
+  // The singleton should only ever be destroyed on the main thread.
+  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+
+  // The session must be shut down first, since it depends on our other
+  // components' still being alive.
+  DisconnectFromHost();
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  env->DeleteGlobalRef(class_);
+  // TODO(solb): crbug.com/259594 Detach all threads from JVM here.
+}
+
+void ChromotingJni::ConnectToHost(const char* username,
+                                  const char* auth_token,
+                                  const char* host_jid,
+                                  const char* host_id,
+                                  const char* host_pubkey) {
+  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+  DCHECK(!session_);
+  session_ = new ChromotingJniInstance(username,
+                                       auth_token,
+                                       host_jid,
+                                       host_id,
+                                       host_pubkey);
+}
+
+void ChromotingJni::DisconnectFromHost() {
+  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+  if (session_) {
+    session_->Cleanup();
+    session_ = NULL;
+  }
+}
+
+void ChromotingJni::ReportConnectionStatus(
+    protocol::ConnectionToHost::State state,
+    protocol::ErrorCode error) {
+  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  env->CallStaticVoidMethod(
+    class_,
+    env->GetStaticMethodID(class_, "reportConnectionStatus", "(II)V"),
+    state,
+    error);
+}
+
+void ChromotingJni::DisplayAuthenticationPrompt() {
+  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  env->CallStaticVoidMethod(
+      class_,
+      env->GetStaticMethodID(class_, "displayAuthenticationPrompt", "()V"));
+}
+
+}  // namespace remoting