/** {@inheritDoc} */
@Override
public void dispose() {
if (pv != null) pv.close();
super.dispose();
}
public void setPVFormula(String pvFormula) {
log.log(Level.FINE, "setPVFormula ({0})", pvFormula); // $NON-NLS-1$
// If we are already scanning that pv, do nothing
if (this.pvFormula != null && this.pvFormula.equals(pvFormula)) {
return;
}
this.pvFormula = pvFormula;
// The PV is different, so disconnect and reset the visuals
if (pv != null) {
pv.close();
pv = null;
}
valuePanel.changeValue(null, false);
changeValuePanel.reset();
metadataPanel.changeValue(null);
detailsPanel.changeValue(null, null);
viewerPanel.changeValue(null);
setLastError(null);
copyValueAction.setEnabled(false);
// If name is blank, update status to waiting and quit
if ((pvFormula == null) || pvFormula.trim().isEmpty()) {
setStatus(Messages.Probe_statusWaitingForPV);
pvFormula = null;
}
// Update displayed name, unless it's already current
if (!(Objects.equals(pvFomulaInputBar.getPVFormula(), pvFormula))) {
pvFomulaInputBar.setPVFormula(pvFormula);
}
if (pvFormula != null) {
setStatus(Messages.Probe_statusSearching);
DesiredRateReadWriteExpression<?, Object> expression = formula(pvFormula);
pv =
PVManager.readAndWrite(expression)
.timeout(ofMillis(5000), Messages.Probe_retryAfterTimeout)
.readListener(
new PVReaderListener<Object>() {
@Override
public void pvChanged(PVReaderEvent<Object> event) {
Object value = event.getPvReader().getValue();
setLastError(event.getPvReader().lastException());
viewerPanel.changeValue(value);
if (event.getPvReader().isConnected()) {
setStatus(Messages.Probe_statusConnected);
} else {
setStatus(Messages.Probe_statusSearching);
}
valuePanel.changeValue(value, event.getPvReader().isConnected());
metadataPanel.changeValue(value);
copyValueAction.setEnabled(export.canExport(value));
}
})
.readListener(changeValuePanel.getReaderListener())
.writeListener(changeValuePanel.getWriterListener())
.notifyOn(swtThread(this))
.asynchWriteAndMaxReadRate(ofHertz(25));
changeValuePanel.setPvWriter(pv);
// Show the PV name as the title
setPartName(pvFormula);
detailsPanel.changeValue(expression, pvFormula);
}
}