package org.epics.archiverappliance.engine.bpl.reports;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.epics.archiverappliance.common.BPLAction;
import org.epics.archiverappliance.common.TimeUtils;
import org.epics.archiverappliance.config.ConfigService;
import org.epics.archiverappliance.engine.model.ArchiveChannel;
import org.epics.archiverappliance.engine.pv.EngineContext;
import org.epics.archiverappliance.engine.pv.PVMetrics;
import org.epics.archiverappliance.utils.ui.MimeTypeConstants;
import org.json.simple.JSONValue;
public class SilentPVReport implements BPLAction {
private static Logger logger = Logger.getLogger(SilentPVReport.class.getName());
private static class SilentPV {
String pvName;
long epochSecondsOflastKnownEvent;
SilentPV(String pvName, long epochSecondsOflastKnownEvent) {
this.pvName = pvName;
this.epochSecondsOflastKnownEvent = epochSecondsOflastKnownEvent;
}
};
@Override
public void execute(HttpServletRequest req, HttpServletResponse resp, ConfigService configService) throws IOException {
String limit = req.getParameter("limit");
logger.info("Silent PV report for " + (limit == null ? "default limit " : ("limit " + limit)));
resp.setContentType(MimeTypeConstants.APPLICATION_JSON);
List<SilentPV> silentPVs = getSilentPVs(configService, limit);
LinkedList<HashMap<String, String>> result = new LinkedList<HashMap<String, String>>();
String identity = configService.getMyApplianceInfo().getIdentity();
try (PrintWriter out = resp.getWriter()) {
for(SilentPV silentPV : silentPVs) {
HashMap<String, String> pvStatus = new HashMap<String, String>();
result.add(pvStatus);
pvStatus.put("pvName", silentPV.pvName);
pvStatus.put("instance", identity);
pvStatus.put("lastKnownEvent", TimeUtils.convertToHumanReadableString(silentPV.epochSecondsOflastKnownEvent));
}
out.println(JSONValue.toJSONString(result));
}
}
private static List<SilentPV> getSilentPVs(ConfigService configService, String limit) {
ArrayList<SilentPV> silentPVs = new ArrayList<SilentPV>();
EngineContext engineContext = configService.getEngineContext();
for(ArchiveChannel channel : engineContext.getChannelList().values()) {
PVMetrics pvMetrics = channel.getPVMetrics();
silentPVs.add(new SilentPV(pvMetrics.getPvName(), pvMetrics.getSecondsOfLastEvent()));
}
Collections.sort(silentPVs, new Comparator<SilentPV>() {
@Override
public int compare(SilentPV o1, SilentPV o2) {
if(o1.epochSecondsOflastKnownEvent == o2.epochSecondsOflastKnownEvent) return 0;
return (o1.epochSecondsOflastKnownEvent < o2.epochSecondsOflastKnownEvent) ? -1 : 1;
}
});
if(limit == null) {
return silentPVs;
}
int limitNum = Integer.parseInt(limit);
return silentPVs.subList(0, Math.min(limitNum, silentPVs.size()));
}
}