Example usage for weka.experiment Task execute

List of usage examples for weka.experiment Task execute

Introduction

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

Prototype

void execute();

Source Link

Document

Execute this task.

Usage

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  ww w  .  j a v  a2  s . c o  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();
    }
}