Beispiel #1
0
 /** {@inheritDoc} */
 @Override
 public void dispose() {
   if (pv != null) pv.close();
   super.dispose();
 }
Beispiel #2
0
  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);
    }
  }