mojo/runner/android/main.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/runner/android/main.h"
   6
   7 #include "base/android/fifo_utils.h"
   8 #include "base/android/jni_android.h"
   9 #include "base/android/jni_array.h"
  10 #include "base/android/jni_string.h"
  11 #include "base/at_exit.h"
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/file_util.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/logging.h"
  18 #include "base/macros.h"
  19 #include "base/message_loop/message_loop.h"
  20 #include "base/run_loop.h"
  21 #include "components/view_manager/android_loader.h"
  22 #include "jni/ShellMain_jni.h"
  23 #include "mojo/common/message_pump_mojo.h"
  24 #include "mojo/runner/android/android_handler_loader.h"
  25 #include "mojo/runner/android/background_application_loader.h"
  26 #include "mojo/runner/android/context_init.h"
  27 #include "mojo/runner/android/ui_application_loader_android.h"
  28 #include "mojo/runner/child_process.h"
  29 #include "mojo/runner/context.h"
  30 #include "mojo/runner/init.h"
  31 #include "mojo/shell/application_loader.h"
  32 #include "ui/gl/gl_surface_egl.h"
  33
  34 using base::LazyInstance;
  35
  36 namespace mojo {
  37 namespace runner {
  38
  39 namespace {
  40
  41 // Tag for logging.
  42 const char kLogTag[] = "chromium";
  43
  44 // Command line argument for the communication fifo.
  45 const char kFifoPath[] = "fifo-path";
  46
  47 LazyInstance<scoped_ptr<base::MessageLoop>> g_java_message_loop =
  48     LAZY_INSTANCE_INITIALIZER;
  49
  50 LazyInstance<scoped_ptr<Context>> g_context = LAZY_INSTANCE_INITIALIZER;
  51
  52 LazyInstance<base::android::ScopedJavaGlobalRef<jobject>> g_main_activiy =
  53     LAZY_INSTANCE_INITIALIZER;
  54
  55 void ConfigureAndroidServices(Context* context) {
  56   context->application_manager()->SetLoaderForURL(
  57       make_scoped_ptr(new UIApplicationLoader(
  58           make_scoped_ptr(new view_manager::AndroidLoader()),
  59           g_java_message_loop.Get().get())),
  60       GURL("mojo:view_manager"));
  61
  62   // Android handler is bundled with the Mojo shell, because it uses the
  63   // MojoShell application as the JNI bridge to bootstrap execution of other
  64   // Android Mojo apps that need JNI.
  65   context->application_manager()->SetLoaderForURL(
  66       make_scoped_ptr(new BackgroundApplicationLoader(
  67           make_scoped_ptr(new AndroidHandlerLoader()), "android_handler",
  68           base::MessageLoop::TYPE_DEFAULT)),
  69       GURL("mojo:android_handler"));
  70 }
  71
  72 void ExitShell() {
  73   Java_ShellMain_finishActivity(base::android::AttachCurrentThread(),
  74                                 g_main_activiy.Get().obj());
  75   exit(0);
  76 }
  77
  78 // Initialize stdout redirection if the command line switch is present.
  79 void InitializeRedirection() {
  80   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(kFifoPath))
  81     return;
  82
  83   base::FilePath fifo_path =
  84       base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(kFifoPath);
  85   base::FilePath directory = fifo_path.DirName();
  86   CHECK(base::CreateDirectoryAndGetError(directory, nullptr))
  87       << "Unable to create directory: " << directory.value();
  88   unlink(fifo_path.value().c_str());
  89   CHECK(base::android::CreateFIFO(fifo_path, 0666))
  90       << "Unable to create fifo: " << fifo_path.value();
  91   CHECK(base::android::RedirectStream(stdout, fifo_path, "w"))
  92       << "Failed to redirect stdout to file: " << fifo_path.value();
  93   CHECK(dup2(STDOUT_FILENO, STDERR_FILENO) != -1)
  94       << "Unable to redirect stderr to stdout.";
  95 }
  96
  97 }  // namespace
  98
  99 static void Init(JNIEnv* env,
 100                  jclass clazz,
 101                  jobject activity,
 102                  jstring mojo_shell_path,
 103                  jobjectArray jparameters,
 104                  jstring j_local_apps_directory,
 105                  jstring j_tmp_dir) {
 106   g_main_activiy.Get().Reset(env, activity);
 107
 108   // Setting the TMPDIR environment variable so that applications can use it.
 109   // TODO(qsr) We will need our subprocesses to inherit this.
 110   int return_value =
 111       setenv("TMPDIR",
 112              base::android::ConvertJavaStringToUTF8(env, j_tmp_dir).c_str(), 1);
 113   DCHECK_EQ(return_value, 0);
 114
 115   base::android::ScopedJavaLocalRef<jobject> scoped_activity(env, activity);
 116   base::android::InitApplicationContext(env, scoped_activity);
 117
 118   std::vector<std::string> parameters;
 119   parameters.push_back(
 120       base::android::ConvertJavaStringToUTF8(env, mojo_shell_path));
 121   base::android::AppendJavaStringArrayToStringVector(env, jparameters,
 122                                                      &parameters);
 123   base::CommandLine::Init(0, nullptr);
 124   base::CommandLine::ForCurrentProcess()->InitFromArgv(parameters);
 125
 126   InitializeLogging();
 127   mojo::runner::WaitForDebuggerIfNecessary();
 128
 129   InitializeRedirection();
 130
 131   // We want ~MessageLoop to happen prior to ~Context. Initializing
 132   // LazyInstances is akin to stack-allocating objects; their destructors
 133   // will be invoked first-in-last-out.
 134   Context* shell_context = new Context();
 135   shell_context->SetShellFileRoot(base::FilePath(
 136       base::android::ConvertJavaStringToUTF8(env, j_local_apps_directory)));
 137   g_context.Get().reset(shell_context);
 138
 139   g_java_message_loop.Get().reset(new base::MessageLoopForUI);
 140   base::MessageLoopForUI::current()->Start();
 141
 142   ConfigureAndroidServices(shell_context);
 143   shell_context->Init();
 144
 145   // This is done after the main message loop is started since it may post
 146   // tasks. This is consistent with the ordering from the desktop version of
 147   // this file (../desktop/launcher_process.cc).
 148   InitContext(shell_context);
 149
 150   // TODO(abarth): At which point should we switch to cross-platform
 151   // initialization?
 152
 153   gfx::GLSurface::InitializeOneOff();
 154 }
 155
 156 static void Start(JNIEnv* env, jclass clazz) {
 157 #if defined(MOJO_SHELL_DEBUG_URL)
 158   base::CommandLine::ForCurrentProcess()->AppendArg(MOJO_SHELL_DEBUG_URL);
 159   // Sleep for 5 seconds to give the debugger a chance to attach.
 160   sleep(5);
 161 #endif
 162
 163   Context* context = g_context.Pointer()->get();
 164   context->RunCommandLineApplication(base::Bind(ExitShell));
 165 }
 166
 167 static void AddApplicationURL(JNIEnv* env, jclass clazz, jstring jurl) {
 168   base::CommandLine::ForCurrentProcess()->AppendArg(
 169       base::android::ConvertJavaStringToUTF8(env, jurl));
 170 }
 171
 172 bool RegisterShellMain(JNIEnv* env) {
 173   return RegisterNativesImpl(env);
 174 }
 175
 176 Context* GetContext() {
 177   return g_context.Get().get();
 178 }
 179
 180 }  // namespace runner
 181 }  // namespace mojo
 182
 183 int main(int argc, char** argv) {
 184   base::AtExitManager at_exit;
 185   base::CommandLine::Init(argc, argv);
 186
 187   mojo::runner::InitializeLogging();
 188   return mojo::runner::ChildProcessMain();
 189 }