SeekandPrintTimes.java

package edu.stanford.slac.archiverappliance.PlainPB.utils;

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import org.epics.archiverappliance.Event;
import org.epics.archiverappliance.common.TimeUtils;
import org.epics.archiverappliance.data.DBRTimeEvent;

import edu.stanford.slac.archiverappliance.PlainPB.FileBackedPBEventStream;
import edu.stanford.slac.archiverappliance.PlainPB.PBFileInfo;

/**
 * Seek to a position in the file and then print some info about each event.
 * Very useful for debugging seek/search issues.
 * @author mshankar
 *
 */
public class SeekandPrintTimes {
	public static void main(String[] args) throws Exception {
		if(args.length < 2) {
			System.err.println("Usage: java edu.stanford.slac.archiverappliance.PlainPB.utils.SeekandPrintTimes <File> <Position (long)>");
			return;
		}
		String fileName = args[0];
		long position = Long.parseLong(args[1]);
		Path path = Paths.get(fileName);
		System.out.println("Printing times for file " + path.toAbsolutePath().toString());
		PBFileInfo info = new PBFileInfo(path);
		try (FileBackedPBEventStream strm = new FileBackedPBEventStream(info.getPVName(), path, info.getType(), position, Files.size(path))) {
			for(Event ev : strm) {
				System.out.println(TimeUtils.convertToISO8601String(((DBRTimeEvent)ev).getEventTimeStamp())
						+ "\t" + TimeUtils.convertToHumanReadableString((((DBRTimeEvent)ev).getEventTimeStamp()))
						+ "\t" + ev.getSampleValue().toString());
			}
		}
	}
}