ApplianceMetrics.java

/*******************************************************************************
 * Copyright (c) 2011 The Board of Trustees of the Leland Stanford Junior University
 * as Operator of the SLAC National Accelerator Laboratory.
 * Copyright (c) 2011 Brookhaven National Laboratory.
 * EPICS archiver appliance is distributed subject to a Software License Agreement found
 * in file LICENSE that is included with this distribution.
 *******************************************************************************/
package org.epics.archiverappliance.etl.bpl.reports;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.util.HashMap;
import java.util.List;

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

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

/**
 * Gets the ETL appliance metrics
 * @author mshankar
 *
 */
public class ApplianceMetrics implements BPLAction {

	@Override
	public void execute(HttpServletRequest req, HttpServletResponse resp, ConfigService configService) throws IOException {
		resp.setContentType(MimeTypeConstants.APPLICATION_JSON);
		try (PrintWriter out = resp.getWriter()) {
			out.println(getETLMetrics(configService));
		}
	}
	
	private String getETLMetrics(ConfigService configService) {
		HashMap<String, String> metrics = new HashMap<String, String>();
		List<ETLMetricsForLifetime> metricsForLifetime = configService.getETLLookup().getApplianceMetrics();
		if(metricsForLifetime == null || metricsForLifetime.size() < 1) {
			metrics.put("Startup", "In Progress");
		} else { 
			double maxETLPercentage = 0.0; 
			long currentEpochSeconds = TimeUtils.getCurrentEpochSeconds();
			for(ETLMetricsForLifetime metricForLifetime : metricsForLifetime) {
				double etlPercentage = (metricForLifetime.getTimeForOverallETLInMilliSeconds()/1000)*100/(currentEpochSeconds - metricForLifetime.getStartOfMetricsMeasurementInEpochSeconds());
				maxETLPercentage = Math.max(etlPercentage, maxETLPercentage);
				metrics.put("totalETLRuns("+metricForLifetime.getLifeTimeId()+")", Long.toString(metricForLifetime.getTotalETLRuns()));
				metrics.put("timeForOverallETLInSeconds("+metricForLifetime.getLifeTimeId()+")", Long.toString(metricForLifetime.getTimeForOverallETLInMilliSeconds()/1000));
			}
			DecimalFormat twoSignificantDigits = new DecimalFormat("###,###,###,###,###,###.##");
			metrics.put("maxETLPercentage", twoSignificantDigits.format(maxETLPercentage));
		}

		return JSONValue.toJSONString(metrics);
	}
}