public void forcePointRead(int dataPointId) {
DataPointRT dataPoint = dataPoints.get(dataPointId);
if (dataPoint == null) throw new RTException("Point is not enabled");
// Tell the data source to read the point value;
DataSourceRT ds = getRunningDataSource(dataPoint.getDataSourceId());
if (ds != null)
// The data source may have been disabled. Just make sure.
ds.forcePointRead(dataPoint);
}
public void setDataPointValue(int dataPointId, PointValueTime valueTime, SetPointSource source) {
DataPointRT dataPoint = dataPoints.get(dataPointId);
if (dataPoint == null) throw new RTException("Point is not enabled");
if (!dataPoint.getPointLocator().isSettable()) throw new RTException("Point is not settable");
// Tell the data source to set the value of the point.
DataSourceRT ds = getRunningDataSource(dataPoint.getDataSourceId());
// The data source may have been disabled. Just make sure.
if (ds != null) ds.setPointValue(dataPoint, valueTime, source);
}
public void relinquish(int dataPointId) {
DataPointRT dataPoint = dataPoints.get(dataPointId);
if (dataPoint == null) throw new RTException("Point is not enabled");
if (!dataPoint.getPointLocator().isSettable()) throw new RTException("Point is not settable");
if (!dataPoint.getPointLocator().isRelinquishable())
throw new RTException("Point is not relinquishable");
// Tell the data source to relinquish value of the point.
DataSourceRT ds = getRunningDataSource(dataPoint.getDataSourceId());
// The data source may have been disabled. Just make sure.
if (ds != null) ds.relinquish(dataPoint);
}
private void stopDataPoint(int dataPointId) {
synchronized (dataPoints) {
// Remove this point from the data image if it is there. If not, just quit.
DataPointRT p = dataPoints.remove(dataPointId);
// Remove it from the data source, and terminate it.
if (p != null) {
getRunningDataSource(p.getDataSourceId()).removeDataPoint(p);
DataPointListener l = getDataPointListeners(dataPointId);
if (l != null) l.pointTerminated();
p.terminate();
}
}
}
private void stopDataSource(int id) {
synchronized (runningDataSources) {
DataSourceRT dataSource = getRunningDataSource(id);
if (dataSource == null) return;
// Stop the data points.
for (DataPointRT p : dataPoints.values()) {
if (p.getDataSourceId() == id) stopDataPoint(p.getId());
}
runningDataSources.remove(dataSource);
dataSource.terminate();
dataSource.joinTermination();
LOG.info("Data source '" + dataSource.getName() + "' stopped");
}
}
protected void createStateImpl(
RuntimeManager rtm, HttpServletRequest request, JspComponentState state) {
DataPointRT dataPointRT = rtm.getDataPoint(this.dataPointVO.getId());
String value;
if (dataPointRT == null) {
value = this.disabledValue;
} else {
PointValueTime pvt = dataPointRT.getPointValue();
if ((pvt != null) && ((pvt.getValue() instanceof ImageValue))) {
Map model = new HashMap();
model.put("point", this.dataPointVO);
model.put("pointValue", pvt);
value = BaseDwr.generateContent(request, "imageValueThumbnail.jsp", model);
} else {
int hint = this.raw ? 1 : 2;
value = this.dataPointVO.getTextRenderer().getText(pvt, hint);
if ((pvt != null) && (this.time)) state.setTime(Long.valueOf(pvt.getTime()));
}
}
state.setValue(value);
}
@Override
protected void createStateImpl(
RuntimeManager rtm, HttpServletRequest request, JspComponentState state) {
String value;
DataPointRT dataPointRT = rtm.getDataPoint(dataPointVO.getId());
if (dataPointRT == null) value = disabledValue;
else {
PointValueTime pvt = dataPointRT.getPointValue();
if (pvt != null && pvt.getValue() instanceof ImageValue) {
// Text renderers don't help here. Create a thumbnail.
Map<String, Object> model = new HashMap<String, Object>();
model.put("point", dataPointVO);
model.put("pointValue", pvt);
value = BaseDwr.generateContent(request, "imageValueThumbnail.jsp", model);
} else {
int hint = raw ? TextRenderer.HINT_RAW : TextRenderer.HINT_FULL;
value = dataPointVO.getTextRenderer().getText(pvt, hint);
if (pvt != null && time) state.setTime(pvt.getTime());
}
}
state.setValue(value);
}
private void startDataPoint(DataPointVO vo) {
synchronized (dataPoints) {
Assert.isTrue(vo.isEnabled());
// Only add the data point if its data source is enabled.
DataSourceRT ds = getRunningDataSource(vo.getDataSourceId());
if (ds != null) {
// Change the VO into a data point implementation.
DataPointRT dataPoint = new DataPointRT(vo, vo.getPointLocator().createRuntime());
// Add/update it in the data image.
dataPoints.put(dataPoint.getId(), dataPoint);
// Initialize it.
dataPoint.initialize();
DataPointListener l = getDataPointListeners(vo.getId());
if (l != null) l.pointInitialized();
// Add/update it in the data source.
ds.addDataPoint(dataPoint);
}
}
}
private void updateDataPointValuesRT(int dataPointId) {
DataPointRT dataPoint = dataPoints.get(dataPointId);
if (dataPoint != null)
// Enabled. Reset the point's cache.
dataPoint.resetValues();
}
