org.miloss.fgsms.services.rs.impl.reports.broker.QueueDepth.java Source code

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package org.miloss.fgsms.services.rs.impl.reports.broker;

import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.GregorianCalendar;
import java.util.List;
import javax.xml.ws.WebServiceContext;
import org.apache.log4j.Level;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.miloss.fgsms.common.DBUtils;
import org.miloss.fgsms.common.UserIdentityUtil;
import org.miloss.fgsms.common.Utility;
import org.miloss.fgsms.services.interfaces.common.PolicyType;
import org.miloss.fgsms.services.interfaces.common.SecurityWrapper;
import org.miloss.fgsms.services.interfaces.common.TimeRange;
import static org.miloss.fgsms.services.rs.impl.Reporting.getFilePathDelimitor;
import org.miloss.fgsms.services.rs.impl.reports.BaseReportGenerator;

/**
 *
 * @author AO
 */
public class QueueDepth extends BaseReportGenerator {

    @Override
    public String GetDisplayName() {
        return "Message Broker Queue Depth";
    }

    @Override
    public String GetHtmlFormattedHelp() {
        return "This represents the average queue depth of all channels (topics/queues/etc) on a specific message broker. An increase or high "
                + "rate can indicate that a subscriber is offline or non-functional. For chart, X axis is time, Y is queue depth";
    }

    @Override
    public List<PolicyType> GetAppliesTo() {
        ArrayList<PolicyType> ret = new ArrayList<PolicyType>();
        ret.add(PolicyType.STATISTICAL);
        return ret;
    }

    @Override
    public void generateReport(OutputStreamWriter data, List<String> urls, String path, List<String> files,
            TimeRange range, String currentuser, SecurityWrapper classification, WebServiceContext ctx)
            throws IOException {

        Connection con = Utility.getPerformanceDBConnection();
        try {
            PreparedStatement cmd = null;
            ResultSet rs = null;
            DefaultCategoryDataset set = new DefaultCategoryDataset();
            JFreeChart chart = null;

            data.append("<hr /><h2>").append(GetDisplayName()).append("</h2>");
            data.append(GetHtmlFormattedHelp() + "<br />");
            data.append("<table class=\"table table-hover\"><tr><th>URI</th><th>Channel</th><th>Depth</th></tr>");

            TimeSeriesCollection col = new TimeSeriesCollection();
            for (int i = 0; i < urls.size(); i++) {
                if (!isPolicyTypeOf(urls.get(i), PolicyType.STATISTICAL)) {
                    continue;
                }
                //https://github.com/mil-oss/fgsms/issues/112
                if (!UserIdentityUtil.hasReadAccess(currentuser, "getReport", urls.get(i), classification, ctx)) {
                    continue;
                }
                String url = Utility.encodeHTML(getPolicyDisplayName(urls.get(i)));
                double average = 0;
                data.append("<tr><td>").append(url).append("</td>");
                try {
                    cmd = con.prepareStatement(
                            "select avg(queuedepth), host, canonicalname from brokerhistory where host=? and utcdatetime > ? and utcdatetime < ? group by canonicalname, host;");
                    cmd.setString(1, urls.get(i));
                    cmd.setLong(2, range.getStart().getTimeInMillis());
                    cmd.setLong(3, range.getEnd().getTimeInMillis());
                    rs = cmd.executeQuery();

                    if (rs.next()) {
                        average = rs.getDouble(1);
                    }
                } catch (Exception ex) {
                    log.log(Level.ERROR, "Error opening or querying the database.", ex);
                } finally {
                    DBUtils.safeClose(rs);
                    DBUtils.safeClose(cmd);
                }
                data.append("<td>").append(average + "").append("</td>");

                TimeSeries ts = new TimeSeries(url, Millisecond.class);
                try {
                    //ok now get the raw data....
                    cmd = con.prepareStatement(
                            "select utcdatetime,queuedepth, canonicalname from brokerhistory where host=? and utcdatetime > ? and utcdatetime < ?;");
                    cmd.setString(1, urls.get(i));
                    cmd.setLong(2, range.getStart().getTimeInMillis());
                    cmd.setLong(3, range.getEnd().getTimeInMillis());
                    rs = cmd.executeQuery();

                    while (rs.next()) {

                        //set.addValue(rs.getLong(1), urls.get(i), rs.getString("canonicalname"));
                        GregorianCalendar gcal = new GregorianCalendar();
                        gcal.setTimeInMillis(rs.getLong(1));
                        Millisecond m = new Millisecond(gcal.getTime());
                        //TimeSeriesDataItem t = new TimeSeriesDataItem(m, rs.getLong(2));
                        //ts.add(t);
                        ts.addOrUpdate(m, rs.getLong(2));

                    }

                } catch (Exception ex) {
                    log.log(Level.ERROR, "Error opening or querying the database.", ex);
                } finally {
                    DBUtils.safeClose(rs);
                    DBUtils.safeClose(cmd);
                }

                col.addSeries(ts);

            }
            chart = org.jfree.chart.ChartFactory.createTimeSeriesChart(GetDisplayName(), "Timestamp", "Count", col,
                    true, false, false);

            data.append("</table>");
            try {
                //  if (set.getRowCount() != 0) {
                ChartUtilities.saveChartAsPNG(new File(
                        path + getFilePathDelimitor() + "image_" + this.getClass().getSimpleName() + ".png"), chart,
                        1500, 400);
                data.append("<img src=\"image_").append(this.getClass().getSimpleName()).append(".png\">");
                files.add(path + getFilePathDelimitor() + "image_" + this.getClass().getSimpleName() + ".png");
                // }
            } catch (IOException ex) {
                log.log(Level.ERROR, "Error saving chart image for request", ex);
            }
        } catch (Exception ex) {
            log.log(Level.ERROR, null, ex);
        } finally {
            DBUtils.safeClose(con);
        }
    }

}