/**
* Loads the data as statistics if applicable for the given pv name. This method will always
* retrieve optimized data.
*
* @param pvname the name of the provided PV
* @param count the number of requested points
* @param start the start Instant of the data
* @param end the end Instant of the data
* @return the array of statistical data
* @throws Exception in case of an error
*/
protected ArchiveVType[] getValuesStatistics(String pvname, int count, Instant start, Instant end)
throws Exception {
ValueIterator iterator = getIterator(pvname, true, count, start, end);
ArrayList<ArchiveVType> vals = new ArrayList<ArchiveVType>();
while (iterator.hasNext()) {
vals.add((ArchiveVType) iterator.next());
}
iterator.close();
return vals.toArray(new ArchiveVType[vals.size()]);
}
/**
* Loads the numerical data for the provided pv.
*
* @param pvname the name of the PV to load data from
* @param optimized true if optimized data should be loaded or false otherwise
* @param count number of points to load in case optimized retrieval is selected
* @param start the start Instant of the data
* @param end the end Instant of the data
* @return the array of data
* @throws Exception in case of an error
*/
protected ArchiveVNumberArray[] getValuesNumberArray(
String pvname, boolean optimized, int count, Instant start, Instant end) throws Exception {
ValueIterator iterator = getIterator(pvname, optimized, count, start, end);
ArrayList<ArchiveVNumberArray> vals = new ArrayList<ArchiveVNumberArray>();
while (iterator.hasNext()) {
vals.add((ArchiveVNumberArray) iterator.next());
}
iterator.close();
return vals.toArray(new ArchiveVNumberArray[vals.size()]);
}
/** {@inheritDoc} */
@Override
public void run() {
Activator.getLogger().log(Level.FINE, "Starting {0}", ArchiveFetchJob.this); // $NON-NLS-1$
final BenchmarkTimer timer = new BenchmarkTimer();
long samples = 0;
final int bins = Preferences.getPlotBins();
final ArchiveDataSource archives[] = item.getArchiveDataSources();
List<ArchiveDataSource> sourcesWhereChannelDoesntExist = new ArrayList<>();
for (int i = 0; i < archives.length && !cancelled; ++i) {
final ArchiveDataSource archive = archives[i];
final String url = archive.getUrl();
// Display "N/total", using '1' for the first sub-archive.
synchronized (this) {
message =
NLS.bind(
Messages.ArchiveFetchDetailFmt,
new Object[] {archive.getName(), (i + 1), archives.length});
}
try {
final ArchiveReader the_reader;
synchronized (this) {
the_reader = reader = ArchiveRepository.getInstance().getArchiveReader(url);
}
the_reader.enableConcurrency(concurrency);
final ValueIterator value_iter;
try {
if (item.getRequestType() == RequestType.RAW)
value_iter =
the_reader.getRawValues(archive.getKey(), item.getResolvedName(), start, end);
else
value_iter =
the_reader.getOptimizedValues(
archive.getKey(), item.getResolvedName(), start, end, bins);
} catch (UnknownChannelException e) {
// Do not immediately notify about unknown channels. First search for the data in all
// archive
// sources and only report this kind of errors at the end
sourcesWhereChannelDoesntExist.add(archives[i]);
continue;
}
// Get samples into array
final List<VType> result = new ArrayList<VType>();
while (value_iter.hasNext()) result.add(value_iter.next());
samples += result.size();
item.mergeArchivedSamples(the_reader.getServerName(), result);
if (cancelled) break;
value_iter.close();
} catch (Exception ex) { // Tell listener unless it's the result of a 'cancel'?
if (!cancelled) listener.archiveFetchFailed(ArchiveFetchJob.this, archive, ex);
// Continue with the next data source
} finally {
synchronized (this) {
if (reader != null) reader.close();
reader = null;
}
}
}
if (!sourcesWhereChannelDoesntExist.isEmpty() && !cancelled) {
listener.channelNotFound(
ArchiveFetchJob.this,
sourcesWhereChannelDoesntExist.size() < archives.length,
sourcesWhereChannelDoesntExist.toArray(
new ArchiveDataSource[sourcesWhereChannelDoesntExist.size()]));
}
timer.stop();
if (!cancelled) listener.fetchCompleted(ArchiveFetchJob.this);
Activator.getLogger()
.log(
Level.FINE,
"Ended {0} with {1} samples in {2}", //$NON-NLS-1$
new Object[] {ArchiveFetchJob.this, samples, timer});
}