Example usage for weka.experiment Task getTaskStatus

Introduction

In this page you can find the example usage for weka.experiment Task getTaskStatus.

Prototype

TaskStatusInfo getTaskStatus();

Source Link

Document

Clients should be able to call this method at any time to obtain information on a current task.

Usage

From source file:core.utils.ui.RemoteEngine.java

License:Open Source License

/**
 * Adds a new task to the queue./*from w  ww .  java  2s . co m*/
 *
 * @param t a <code>Task</code> value to be added
 * @param taskId the id of the task to be added
 */
private synchronized void addTaskToQueue(Task t, String taskId) {
    TaskStatusInfo newTask = t.getTaskStatus();
    if (newTask == null) {
        newTask = new TaskStatusInfo();
    }
    m_TaskQueue.push(t);
    m_TaskIdQueue.push(taskId);
    newTask.setStatusMessage(
            "RemoteEngine (" + m_HostName + ") : task " + taskId + " queued at postion: " + m_TaskQueue.size());
    // add task status to HashTable
    m_TaskStatus.put(taskId, newTask);
    System.err.println("Task id : " + taskId + " Queued.");
    if (m_TaskRunning == false) {
        startTask();
    }
}

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From source file:core.utils.ui.RemoteEngine.java

License:Open Source License

/**
 * Checks to see if there are any waiting tasks, and if no task is
 * currently running starts a waiting task.
 *//*from  www.j  ava  2 s .  co m*/
private void startTask() {

    if (m_TaskRunning == false && m_TaskQueue.size() > 0) {
        Thread activeTaskThread;
        activeTaskThread = new Thread() {

            public void run() {
                m_TaskRunning = true;
                Task currentTask = (Task) m_TaskQueue.pop();
                String taskId = (String) m_TaskIdQueue.pop();
                TaskStatusInfo tsi = (TaskStatusInfo) m_TaskStatus.get(taskId);
                tsi.setExecutionStatus(TaskStatusInfo.PROCESSING);
                tsi.setStatusMessage("RemoteEngine (" + m_HostName + ") : task " + taskId + " running...");
                try {
                    System.err.println("Launching task id : " + taskId + "...");
                    currentTask.execute();
                    TaskStatusInfo runStatus = currentTask.getTaskStatus();
                    tsi.setExecutionStatus(runStatus.getExecutionStatus());
                    tsi.setStatusMessage(
                            "RemoteExperiment (" + m_HostName + ") " + runStatus.getStatusMessage());
                    tsi.setTaskResult(runStatus.getTaskResult());
                } catch (Error er) {
                    // Object initialization can raise Error, which are not subclass of Exception
                    tsi.setExecutionStatus(TaskStatusInfo.FAILED);
                    if (er.getCause() instanceof java.security.AccessControlException) {
                        tsi.setStatusMessage("RemoteEngine (" + m_HostName
                                + ") : security error, check remote policy file.");
                        System.err.println("Task id " + taskId + " Failed! Check remote policy file");
                    } else {
                        tsi.setStatusMessage(
                                "RemoteEngine (" + m_HostName + ") : unknown initialization error.");
                        System.err.println("Task id " + taskId + " Unknown initialization error");
                    }
                } catch (Exception ex) {
                    tsi.setExecutionStatus(TaskStatusInfo.FAILED);
                    if (ex instanceof java.io.FileNotFoundException) {
                        tsi.setStatusMessage("RemoteEngine (" + m_HostName + ") : " + ex.getMessage());
                        System.err.println("Task id " + taskId + " Failed, " + ex.getMessage());
                    } else {
                        tsi.setStatusMessage("RemoteEngine (" + m_HostName + ") : task " + taskId + " failed.");
                        System.err.println("Task id " + taskId + " Failed!");
                    }
                } finally {
                    if (m_TaskStatus.size() == 0) {
                        purgeClasses();
                    }
                    m_TaskRunning = false;
                    // start any waiting tasks
                    startTask();
                }
            }
        };
        activeTaskThread.setPriority(Thread.MIN_PRIORITY);
        activeTaskThread.start();
    }
}

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