protected void initManager(BSFManager mgr) throws BSFException {
    final String label = getName();
    final String fileName = getFilename();
    final String scriptParameters = getParameters();
    // Use actual class name for log
    final Logger logger = LoggingManager.getLoggerForShortName(getClass().getName());
    mgr.declareBean("log", logger, Logger.class); // $NON-NLS-1$
    mgr.declareBean("Label", label, String.class); // $NON-NLS-1$
    mgr.declareBean("FileName", fileName, String.class); // $NON-NLS-1$
    mgr.declareBean("Parameters", scriptParameters, String.class); // $NON-NLS-1$
    String[] args = JOrphanUtils.split(scriptParameters, " "); // $NON-NLS-1$
    mgr.declareBean("args", args, args.getClass()); // $NON-NLS-1$
    // Add variables for access to context and variables
    JMeterContext jmctx = JMeterContextService.getContext();
    JMeterVariables vars = jmctx.getVariables();
    Properties props = JMeterUtils.getJMeterProperties();

    mgr.declareBean("ctx", jmctx, jmctx.getClass()); // $NON-NLS-1$
    mgr.declareBean("vars", vars, vars.getClass()); // $NON-NLS-1$
    mgr.declareBean("props", props, props.getClass()); // $NON-NLS-1$
    // For use in debugging:
    mgr.declareBean("OUT", System.out, PrintStream.class); // $NON-NLS-1$

    // Most subclasses will need these:
    Sampler sampler = jmctx.getCurrentSampler();
    mgr.declareBean("sampler", sampler, Sampler.class);
    SampleResult prev = jmctx.getPreviousResult();
    mgr.declareBean("prev", prev, SampleResult.class);
  }
  protected void initManager(ScriptEngineManager sem) {
    final String label = getName();
    final String fileName = getFilename();
    final String scriptParameters = getParameters();
    // Use actual class name for log
    final Logger logger = LoggingManager.getLoggerForShortName(getClass().getName());

    sem.put("log", logger);
    sem.put("Label", label);
    sem.put("FileName", fileName);
    sem.put("Parameters", scriptParameters);
    String[] args = JOrphanUtils.split(scriptParameters, " "); // $NON-NLS-1$
    sem.put("args", args);
    // Add variables for access to context and variables
    JMeterContext jmctx = JMeterContextService.getContext();
    sem.put("ctx", jmctx);
    JMeterVariables vars = jmctx.getVariables();
    sem.put("vars", vars);
    Properties props = JMeterUtils.getJMeterProperties();
    sem.put("props", props);
    // For use in debugging:
    sem.put("OUT", System.out);

    // Most subclasses will need these:
    Sampler sampler = jmctx.getCurrentSampler();
    sem.put("sampler", sampler);
    SampleResult prev = jmctx.getPreviousResult();
    sem.put("prev", prev);
  }
 public String execute() throws InvalidVariableException {
   JMeterContext context = JMeterContextService.getContext();
   SampleResult previousResult = context.getPreviousResult();
   Sampler currentSampler = context.getCurrentSampler();
   return execute(previousResult, currentSampler);
 }