GetLastKnownEventTimeStamp.java

package org.epics.archiverappliance.etl.bpl;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.epics.archiverappliance.Event;
import org.epics.archiverappliance.common.BPLAction;
import org.epics.archiverappliance.common.TimeUtils;
import org.epics.archiverappliance.config.ConfigService;
import org.epics.archiverappliance.utils.ui.MimeTypeConstants;
import org.json.simple.JSONValue;

public class GetLastKnownEventTimeStamp implements BPLAction {

	@Override
	public void execute(HttpServletRequest req, HttpServletResponse resp, ConfigService configService) throws IOException {
		String pvName = req.getParameter("pv");
		if(pvName == null || pvName.equals("")) {
			resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
			return;
		}

		Event event = configService.getETLLookup().getLatestEventFromDataStores(pvName);
		if(event != null) {
			resp.setContentType(MimeTypeConstants.APPLICATION_JSON);
			HashMap<String, String> result = new HashMap<String, String>();
			result.put("timestamp", TimeUtils.convertToISO8601String(event.getEventTimeStamp()));
			try (PrintWriter out = resp.getWriter()) {
				out.println(JSONValue.toJSONString(result));
			}
		} else {
			resp.sendError(HttpServletResponse.SC_NOT_FOUND);
			return;
		}
	}
}