/* (non-Javadoc)
* @see org.csstudio.archive.reader.ValueIterator#close()
*/
@Override
public void close() {
try {
synchronized (this) {
if (stdStream != null) {
stdStream.close();
}
if (minStream != null) {
minStream.close();
}
if (maxStream != null) {
maxStream.close();
}
if (countStream != null) {
countStream.close();
}
super.close();
}
} catch (IOException e) {
throw new IllegalStateException(e);
}
}
/*
* (non-Javadoc)
* @see org.csstudio.archive.reader.appliance.ApplianceMeanValueIterator#fetchDataInternal(java.lang.String)
*/
@Override
protected void fetchDataInternal(String pvName) throws ArchiverApplianceException {
super.fetchDataInternal(pvName);
int interval = Math.max(1, (int) ((end.getSec() - start.getSec()) / requestedPoints));
java.sql.Timestamp sqlStartTimestamp = TimestampHelper.toSQLTimestamp(start);
java.sql.Timestamp sqlEndTimestamp = TimestampHelper.toSQLTimestamp(end);
String std =
new StringBuilder()
.append(ApplianceArchiveReaderConstants.OP_STD)
.append(interval)
.append('(')
.append(pvName)
.append(')')
.toString();
DataRetrieval dataRetrieval = reader.createDataRetriveal(reader.getDataRetrievalURL());
stdStream = dataRetrieval.getDataForPV(std, sqlStartTimestamp, sqlEndTimestamp);
if (stdStream != null) {
stdIterator = stdStream.iterator();
} else {
throw new ArchiverApplianceException("Could not fetch standard deviation data.");
}
String min =
new StringBuilder()
.append(ApplianceArchiveReaderConstants.OP_MIN)
.append(interval)
.append('(')
.append(pvName)
.append(')')
.toString();
dataRetrieval = reader.createDataRetriveal(reader.getDataRetrievalURL());
minStream = dataRetrieval.getDataForPV(min, sqlStartTimestamp, sqlEndTimestamp);
if (minStream != null) {
minIterator = minStream.iterator();
} else {
throw new ArchiverApplianceException("Could not fetch minimum data.");
}
String max =
new StringBuilder()
.append(ApplianceArchiveReaderConstants.OP_MAX)
.append(interval)
.append('(')
.append(pvName)
.append(')')
.toString();
dataRetrieval = reader.createDataRetriveal(reader.getDataRetrievalURL());
maxStream = dataRetrieval.getDataForPV(max, sqlStartTimestamp, sqlEndTimestamp);
if (maxStream != null) {
maxIterator = maxStream.iterator();
} else {
throw new ArchiverApplianceException("Could not fetch maximum data.");
}
String count =
new StringBuilder()
.append(ApplianceArchiveReaderConstants.OP_COUNT)
.append(interval)
.append('(')
.append(pvName)
.append(')')
.toString();
dataRetrieval = reader.createDataRetriveal(reader.getDataRetrievalURL());
countStream = dataRetrieval.getDataForPV(count, sqlStartTimestamp, sqlEndTimestamp);
if (countStream != null) {
countIterator = countStream.iterator();
} else {
throw new ArchiverApplianceException("Could not fetch count data.");
}
}