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Unix time #1270

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a40ffbc
cache unix times by event number
baltzell May 18, 2026
7fa5ff7
used latest cached value for given eventNumber for unixTime
baltzell May 18, 2026
9eaf4ae
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baltzell May 18, 2026
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18 changes: 15 additions & 3 deletions common-tools/clara-io/src/main/java/org/jlab/io/clara/DecoderWriter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

import java.io.File;
import java.nio.file.Path;
import java.util.TreeMap;
import java.util.TreeSet;
import org.jlab.analysis.postprocess.Processor;
import org.jlab.clara.std.services.EventWriterException;
Expand Down Expand Up @@ -38,6 +39,7 @@ public class DecoderWriter extends HipoToHipoWriter {
Bank runConfig;
Bank helicityAdc;
ConstantsManager conman;
TreeMap<Integer,Integer> unixEventMap;
TreeSet<HelicityState> helicities;
DaqScalersSequence scalers;
SchemaFactory fullSchema;
Expand All @@ -49,6 +51,7 @@ private void init(JSONObject opts) {
runConfig = new Bank(fullSchema.getSchema("RUN::config"));
helicityAdc = new Bank(fullSchema.getSchema("HEL::adc"));
helicities = new TreeSet<>();
unixEventMap = new TreeMap<>();
scalers = new DaqScalersSequence(fullSchema);
conman = new ConstantsManager();
conman.init("/runcontrol/hwp","/runcontrol/helicity");
Expand All @@ -72,7 +75,7 @@ protected HipoWriterSorted createWriter(Path file, JSONObject opts) throws Event
throw new EventWriterException(e);
}
}

/**
* In addition to writing the incoming event, copies all tag-1 banks to new
* tag-1 events and writes them, and stores helicity/scaler readings for later.
Expand All @@ -85,6 +88,14 @@ protected void writeEvent(Object event) throws EventWriterException {
((Event)event).read(runConfig);
((Event)event).read(helicityAdc);
helicities.add(HelicityState.createFromFadcBank(helicityAdc, runConfig, conman));
if (runConfig.getRows() > 0) {
int unix = runConfig.getInt("unixTime",0);
int evno = runConfig.getInt("event",0);
// if this event has a good unix time, store it for later:
if (unix > 0) unixEventMap.put(evno, unix);
// otherwise update it with the latest unix time reading:
else runConfig.putInt("unixTime",0, unixEventMap.get(unixEventMap.floorKey(evno)));
}
Event t = CLASDecoder4.createTaggedEvent((Event)event, runConfig, tag1banks);
if (!t.isEmpty()) writer.addEvent(t, 1);
super.writeEvent(event);
Expand All @@ -100,8 +111,9 @@ protected void closeWriter() {
super.closeWriter();
if (postprocess) postprocess();
// keep the latest helicity/scaler reading for the next file:
while (helicities.size() > 60) helicities.pollFirst();
scalers.clear(10);
while (helicities.size() > 100) helicities.pollFirst();
while (unixEventMap.size() > 100) unixEventMap.pollFirstEntry();
scalers.clear(100);
}

private int getRunNumber() {
Expand Down