Debug
debug的入口在CtsConsole类,所以我们把第一个断点打在249行:
- Console console = new CtsConsole();
按F6再按F5进入到Console.startConsole方法中。
按F5进入GlobalConfiguration.createGlobalConfiguration方法中。
该方法内主要是读取全局配置文件并设置IGlobalConfiguration接口对象sInstance。主要方法为95行读取文件的getGlobalConfigPath():
- private static String getGlobalConfigPath() throws ConfigurationException {
- String path = System.getenv(GLOBAL_CONFIG_VARIABLE);
- if (path != null) {
- // don't actually check for accessibility here, since the variable
- // might be specifying
- // a java resource rather than a filename. Even so, this can help
- // the user figure out
- // which global config (if any) was picked up by TF.
- System.err
- .format("Attempting to use global config \"%s\" from variable $%s.\n",
- path, GLOBAL_CONFIG_VARIABLE);
- return path;
- }
- File file = new File(GLOBAL_CONFIG_FILENAME);
- if (file.exists()) {
- path = file.getPath();
- System.err.format(
- "Attempting to use auto detected global config \"%s\".\n",
- path);
- System.err.flush();
- return path;
- }
- // FIXME: search in tradefed.sh launch dir (or classpath?)
- return null;
- }
首先判断是否设置了全局配置文件的系统变量,如果没有设置,那直接在当前文件目录下找tf_global_config.xml文件 。很显然,本程序这些都没有,所以该方法返回的结果应该是null。回到了createGlobalConfiguration(String[] args)方法中:
- if (globalConfigPath != null) {
- // Found a global config file; attempt to parse and use it
- sInstance = configFactory.createGlobalConfigurationFromArgs(
- ArrayUtil.buildArray(new String[] { globalConfigPath },
- args), nonGlobalArgs);
- System.err.format("Success! Using global config \"%s\"\n",
- globalConfigPath);
- } else {
- // Use default global config
- sInstance = new GlobalConfiguration();
- nonGlobalArgs = Arrays.asList(args);
- }
- return nonGlobalArgs;
因为返回的路径为null,所以直接跳转到else语句块中,new一个新对象,没有设置任何属性。最后将命令行参数封装在list中返回,然后console设置参数,最终启动线程来执行任务。所以第二个断点要打在Console的run方法里,然后按F8进入run方法。
run方法中先做一些参数的判断,如果为空,启动CommandScheduler线程,里面会去从执行队列中拿出队首元素,如果取得的队列为空就会结束。
如果参数不为空,除了启动CommandScheduler线程外还会执行其他的操作,如下:
- public void run() {
- List<String> arrrgs = mMainArgs;
- // Fallback, in case this isn't set already
- if (mScheduler == null) {
- mScheduler = new CommandScheduler();
- }
- try {
- // Check System.console() since jline doesn't seem to consistently know whether or not
- // the console is functional.
- if (!isConsoleFunctional()) {
- if (arrrgs.isEmpty()) {
- printLine("No commands for non-interactive mode; exiting.");
- // FIXME: need to run the scheduler here so that the things blocking on it
- // FIXME: will be released.
- mScheduler.start();
- mScheduler.await();
- return;
- } else {
- printLine("Non-interactive mode: Running initial command then exiting.");
- mShouldExit = true;
- }
- }
- // Wait for the CommandScheduler to start. It will hold the JVM open (since the Console
- // thread is a Daemon thread), and also we require it to have started so that we can
- // start processing user input.
- mScheduler.start();
- mScheduler.await();
- String input = "";
- CaptureList groups = new CaptureList();
- String[] tokens;
- // Note: since Console is a daemon thread, the JVM may exit without us actually leaving
- // this read loop. This is by design.
- do {
- if (arrrgs.isEmpty()) {
- input = getConsoleInput();
- if (input == null) {
- // Usually the result of getting EOF on the console
- printLine("");
- printLine("Received EOF; quitting...");
- mShouldExit = true;
- break;
- }
- tokens = null;
- try {
- tokens = QuotationAwareTokenizer.tokenizeLine(input);
- } catch (IllegalArgumentException e) {
- printLine(String.format("Invalid input: %s.", input));
- continue;
- }
- if (tokens == null || tokens.length == 0) {
- continue;
- }
- } else {
- printLine(String.format("Using commandline arguments as starting command: %s",
- arrrgs));
- if (mConsoleReader != null) {
- // Add the starting command as the first item in the console history
- // FIXME: this will not properly escape commands that were properly escaped
- // FIXME: on the commandline. That said, it will still be more convenient
- // FIXME: than copying by hand.
- final String cmd = ArrayUtil.join(" ", arrrgs);
- mConsoleReader.getHistory().addToHistory(cmd);
- }
- tokens = arrrgs.toArray(new String[0]);
- //置空
- arrrgs = Collections.emptyList();
- }
- Runnable command = mCommandTrie.retrieve(groups, tokens);
- if (command != null) {
- executeCmdRunnable(command, groups);
- } else {
- printLine(String.format(
- "Unable to handle command '%s'. Enter 'help' for help.", tokens[0]));
- }
- RunUtil.getDefault().sleep(100);
- } while (!mShouldExit);
- } catch (Exception e) {
- printLine("Console received an unexpected exception (shown below); shutting down TF.");
- e.printStackTrace();
- } finally {
- mScheduler.shutdown();
- // Make sure that we don't quit with messages still in the buffers
- System.err.flush();
- System.out.flush();
- }
- }
上面这段代码主要看846行左右的
- executeCmdRunnable(command, groups);
我们来看这个方法里面的实现:
- /**
- * Execute a command.
- * <p />
- * Exposed for unit testing
- */
- @SuppressWarnings("unchecked")
- void executeCmdRunnable(Runnable command, CaptureList groups) {
- if (command instanceof ArgRunnable) {
- // FIXME: verify that command implements ArgRunnable<CaptureList> instead
- // FIXME: of just ArgRunnable
- ((ArgRunnable<CaptureList>)command).run(groups);
- } else {
- command.run();
- }
- }
会发现程序会跳转到
- ((ArgRunnable<CaptureList>)command).run(groups);
然后再按F5就跳转不进去了,这个时候程序进入到了
所以在这个地方打个断点,重新启动debug,会进入到这个地方。该方法调用了CommandScheduler.addCommand方法,进入该方法
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean addCommand(String[] args, long totalExecTime) {
- try {
- //得到cts配置文件的信息
- IConfiguration config = getConfigFactory().createConfigurationFromArgs(args);
- //打印帮助信息,只打印Importance类型的option信息
- if (config.getCommandOptions().isHelpMode()) {
- getConfigFactory().printHelpForConfig(args, true, System.out);
- System.out.flush();
- //打印所有option信息
- } else if (config.getCommandOptions().isFullHelpMode()) {
- getConfigFactory().printHelpForConfig(args, false, System.out);
- } else if (config.getCommandOptions().isDryRunMode()) {
- if (config.getCommandOptions().isNoisyDryRunMode()) {
- CLog.logAndDisplay(LogLevel.DEBUG, "DRY RUN: %s", Arrays.toString(args));
- } else {
- CLog.d("Dry run mode; skipping adding command: %s", Arrays.toString(args));
- }
- } else {
- config.validateOptions();
- if (config.getCommandOptions().runOnAllDevices()) {
- addCommandForAllDevices(totalExecTime, args);
- } else {
- CommandTracker cmdTracker = createCommandTracker(args);
- cmdTracker.incrementExecTime(totalExecTime);
- ExecutableCommand cmdInstance = createExecutableCommand(cmdTracker, config, false);
- addExecCommandToQueue(cmdInstance, 0);
- }
- return true;
- }
- } catch (ConfigurationException e) {
- e.printStackTrace();
- // FIXME: do this with jline somehow for ANSI support
- // note: make sure not to log (aka record) this line, as (args) may contain passwords.
- System.out.println(String.format("Error while processing args: %s",
- Arrays.toString(args)));
- System.out.println(e.getMessage());
- System.out.println();
- }
- return false;
- }
先来看第一行代码:
- IConfiguration config = getConfigFactory().createConfigurationFromArgs(args);
该方法会根据参数中的第二个参数来找到config目录下的xml文件,读取里面的内容,然后配置CTS框架的9大组件(这个内容放在下一篇文章讲)。得到Config对象后,会判断是全设备运行还是单个设备运行,默认是全设备运行。如果是单设备运行,需要指定设备的sn号,框架根据SN号来找到设备。最后将执行计划放入到队列中。
到此任务的添加就完成了。任务队列不断的接受新的任务,然后CommandScheduler的run方法里有一个循环,每次都取第一个任务出来执行。
- try {
- // Notify other threads that we're running.
- mRunLatch.countDown();
- IDeviceManager manager = getDeviceManager();
- while (!isShutdown()) {
- ExecutableCommand cmd = dequeueConfigCommand();
- if (cmd != null) {
- IDeviceSelection options = cmd.getConfiguration().getDeviceRequirements();
- ITestDevice device = manager.allocateDevice(0, options);
- if (device != null) {
- // Spawn off a thread to perform the invocation
- InvocationThread invThread = startInvocation(manager, device, cmd);
- addInvocationThread(invThread);
- if (cmd.isLoopMode()) {
- addNewExecCommandToQueue(cmd.getCommandTracker());
- }
- } else {
- // no device available for command, put back in queue
- // increment exec time to ensure fair scheduling among commands when devices
- // are scarce
- cmd.getCommandTracker().incrementExecTime(1);
- addExecCommandToQueue(cmd, NO_DEVICE_DELAY_TIME);
- //CLog.logAndDisplay(LogLevel.ERROR,String.format("Can't find device %s.",options.getSerials()));
- }
- }
- }
- mCommandTimer.shutdown();
- CLog.i("Waiting for invocation threads to complete");
- List<InvocationThread> threadListCopy;
- synchronized (this) {
- threadListCopy = new ArrayList<InvocationThread>(mInvocationThreads.size());
- threadListCopy.addAll(mInvocationThreads);
- }
- for (Thread thread : threadListCopy) {
- waitForThread(thread);
- }
- closeRemoteClient();
- if (mRemoteManager != null) {
- mRemoteManager.cancel();
- }
- exit(manager);
- cleanUp();
- CLog.logAndDisplay(LogLevel.INFO, "All done");
- } finally {
- // Make sure that we don't quit with messages still in the buffers
- System.err.flush();
- System.out.flush();
- }

3814

被折叠的 条评论
为什么被折叠?



