/** {@inheritDoc} */
@Override
public void execute(final ScanContext context) throws Exception {
final Device device =
context.getDevice(context.getMacros().resolveMacros(command.getDeviceName()));
// Separate read-back device, or use 'set' device?
final Device readback;
if (command.getReadback().isEmpty()) readback = device;
else readback = context.getDevice(context.getMacros().resolveMacros(command.getReadback()));
// Wait for the device to reach the value?
final NumericValueCondition condition;
if (command.getWait()) {
// When using completion, readback needs to match "right away"
final double check_timeout = command.getCompletion() ? 1.0 : command.getTimeout();
condition =
new NumericValueCondition(
readback,
Comparison.EQUALS,
command.getStart(),
command.getTolerance(),
TimeDuration.ofSeconds(check_timeout));
} else condition = null;
final double start = getLoopStart();
final double end = getLoopEnd();
final double step = getLoopStep();
if (step > 0)
for (double value = start; value <= end; value += step)
executeStep(context, device, condition, readback, value);
else // step is < 0, so stepping down
for (double value = end; value >= start; value += step)
executeStep(context, device, condition, readback, value);
}
/**
* Execute one step of the loop
*
* @param context
* @param device
* @param condition
* @param readback
* @param value
* @throws Exception
*/
private void executeStep(
final ScanContext context,
final Device device,
final NumericValueCondition condition,
final Device readback,
double value)
throws Exception {
logger.log(
Level.INFO,
"Loop setting {0} = {1}{2}",
new Object[] {device.getAlias(), value, (condition != null ? " (waiting)" : "")});
// Set device to value for current step of loop
do_skip = false;
synchronized (this) {
thread = Thread.currentThread();
}
try {
if (command.getCompletion())
device.write(value, TimeDuration.ofSeconds(command.getTimeout()));
else device.write(value);
// .. wait for device to reach value
if (condition != null) {
condition.setDesiredValue(value);
condition.await();
}
// Log the device's value?
if (context.isAutomaticLogMode()) {
final DataLog log = context.getDataLog().get();
final long serial = log.getNextScanDataSerial();
log.log(readback.getAlias(), VTypeHelper.createSample(serial, readback.read()));
}
} catch (InterruptedException ex) { // Ignore if 'next' was requested
if (!do_skip) throw ex;
} finally {
synchronized (this) {
thread = null;
}
}
// Execute loop body or show some estimate of progress
// (not including nested commands)
if (do_skip) context.workPerformed(implementation.size());
else context.execute(implementation);
// If there are no commands that inc. the work units, do it yourself
if (implementation.size() <= 0) context.workPerformed(1);
}
/** {@inheritDoc} */
@Override
public void execute(final ScanContext context) throws Exception {
try {
final ScanScriptContext script_context = new ScriptCommandContextImpl(context);
script_object.run(script_context);
} catch (PyException ex) {
throw new Exception(command.getScript() + ":" + JythonSupport.getExceptionMessage(ex), ex);
}
context.workPerformed(1);
}