Examples with FetchData org.rrd4j.core.FetchData used on opensource projects

Example 6 with FetchData

use of org.rrd4j.core.FetchData in project scheduling by ow2-proactive.

the class RMRest method getStatHistory.

/**
 * Return the statistic history contained in the RM's RRD database,
 * without redundancy, in a friendly JSON format.
 *
 * The following sources will be queried from the RRD DB :<pre>
 * 	{ "BusyNodesCount",
 *    "FreeNodesCount",
 *    "DownNodesCount",
 *    "AvailableNodesCount",
 *    "AverageActivity" }</pre>
 *
 * @param sessionId a valid session
 * @param range a String of 5 chars, one for each stat history source, indicating the time range to fetch
 *      for each source. Each char can be:<ul>
 *            <li>'a' 1 minute
 *            <li>'m' 10 minutes
 *            <li>'h' 1 hour
 *            <li>'H' 8 hours
 *            <li>'d' 1 day
 *            <li>'w' 1 week
 *            <li>'M' 1 month
 *            <li>'y' 1 year</ul>
 * @return a JSON object containing a key for each source
 * @throws InstanceNotFoundException
 * @throws IntrospectionException
 * @throws ReflectionException
 * @throws IOException
 * @throws MalformedObjectNameException
 * @throws NullPointerException
 * @throws InterruptedException
 * @throws NotConnectedException
 */
@Override
@GET
@GZIP
@Path("stathistory")
@Produces("application/json")
public String getStatHistory(@HeaderParam("sessionid") String sessionId, @QueryParam("range") String range) throws InstanceNotFoundException, IntrospectionException, ReflectionException, IOException, MalformedObjectNameException, NullPointerException, InterruptedException, NotConnectedException {
    RMProxyUserInterface rm = checkAccess(sessionId);
    // to make it recognizable by StatHistoryCaching
    if (range.length() > dataSources.length) {
        range = range.substring(0, dataSources.length);
    }
    // complete range if too short
    while (range.length() < dataSources.length) {
        range += 'a';
    }
    StatHistoryCacheEntry cache = StatHistoryCaching.getInstance().getEntry(range);
    // found unexpired cache entry matching the parameters: return it immediately
    if (cache != null) {
        return cache.getValue();
    }
    long l1 = System.currentTimeMillis();
    ObjectName on = new ObjectName(RMJMXBeans.RUNTIMEDATA_MBEAN_NAME);
    AttributeList attrs = rm.getMBeanAttributes(on, new String[] { "StatisticHistory" });
    Attribute attr = (Attribute) attrs.get(0);
    // content of the RRD4J database backing file
    byte[] rrd4j = (byte[]) attr.getValue();
    File rrd4jDb = File.createTempFile("database", "rr4dj");
    rrd4jDb.deleteOnExit();
    try (OutputStream out = new FileOutputStream(rrd4jDb)) {
        out.write(rrd4j);
    }
    // create RRD4J DB, should be identical to the one held by the RM
    RrdDb db = new RrdDb(rrd4jDb.getAbsolutePath(), true);
    long timeEnd = db.getLastUpdateTime();
    // force float separator for JSON parsing
    DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols(Locale.US);
    otherSymbols.setDecimalSeparator('.');
    // formatting will greatly reduce response size
    DecimalFormat formatter = new DecimalFormat("###.###", otherSymbols);
    // construct the JSON response directly in a String
    StringBuilder result = new StringBuilder();
    result.append("{");
    for (int i = 0; i < dataSources.length; i++) {
        String dataSource = dataSources[i];
        char zone = range.charAt(i);
        long timeStart;
        switch(zone) {
            default:
            case // 1 minute
            'a':
                timeStart = timeEnd - 60;
                break;
            case // 10 minute
            'm':
                timeStart = timeEnd - 60 * 10;
                break;
            case // 1 hours
            'h':
                timeStart = timeEnd - 60 * 60;
                break;
            case // 8 hours
            'H':
                timeStart = timeEnd - 60 * 60 * 8;
                break;
            case // 1 day
            'd':
                timeStart = timeEnd - 60 * 60 * 24;
                break;
            case // 1 week
            'w':
                timeStart = timeEnd - 60 * 60 * 24 * 7;
                break;
            case // 1 month
            'M':
                timeStart = timeEnd - 60 * 60 * 24 * 28;
                break;
            case // 1 year
            'y':
                timeStart = timeEnd - 60 * 60 * 24 * 365;
                break;
        }
        FetchRequest req = db.createFetchRequest(ConsolFun.AVERAGE, timeStart, timeEnd);
        req.setFilter(dataSource);
        FetchData fetchData = req.fetchData();
        result.append("\"").append(dataSource).append("\":[");
        double[] values = fetchData.getValues(dataSource);
        for (int j = 0; j < values.length; j++) {
            if (Double.compare(Double.NaN, values[j]) == 0) {
                result.append("null");
            } else {
                result.append(formatter.format(values[j]));
            }
            if (j < values.length - 1)
                result.append(',');
        }
        result.append(']');
        if (i < dataSources.length - 1)
            result.append(',');
    }
    result.append("}");
    db.close();
    rrd4jDb.delete();
    String ret = result.toString();
    StatHistoryCaching.getInstance().addEntry(range, l1, ret);
    return ret;
}

Example 7 with FetchData

use of org.rrd4j.core.FetchData in project scheduling by ow2-proactive.

the class SigarProcesses method getAttributesHistory.

@Override
public String getAttributesHistory(String objectName, String[] attrs, String range) throws IOException {
    RrdDb db = new RrdDb(statBaseName, true);
    long timeEnd = db.getLastUpdateTime();
    // force float separator for JSON parsing
    DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols(Locale.US);
    otherSymbols.setDecimalSeparator('.');
    // formatting will greatly reduce response size
    DecimalFormat formatter = new DecimalFormat("###.###", otherSymbols);
    // construct the JSON response directly in a String
    StringBuilder result = new StringBuilder();
    result.append("{");
    for (int i = 0; i < attrs.length; i++) {
        String dataSource = RRDSigarDataStore.toDataStoreName(attrs[i] + "-" + objectName);
        char zone = range.charAt(0);
        long timeStart;
        switch(zone) {
            default:
            case // 1 minute
            'a':
                timeStart = timeEnd - 60;
                break;
            case // 10 minute
            'm':
                timeStart = timeEnd - 60 * 10;
                break;
            case // 1 hours
            'h':
                timeStart = timeEnd - 60 * 60;
                break;
            case // 8 hours
            'H':
                timeStart = timeEnd - 60 * 60 * 8;
                break;
            case // 1 day
            'd':
                timeStart = timeEnd - 60 * 60 * 24;
                break;
            case // 1 week
            'w':
                timeStart = timeEnd - 60 * 60 * 24 * 7;
                break;
            case // 1 month
            'M':
                timeStart = timeEnd - 60 * 60 * 24 * 28;
                break;
            case // 1 year
            'y':
                timeStart = timeEnd - 60 * 60 * 24 * 365;
                break;
        }
        FetchRequest req = db.createFetchRequest(ConsolFun.AVERAGE, timeStart, timeEnd);
        req.setFilter(dataSource);
        FetchData fetchData = req.fetchData();
        result.append("\"").append(dataSource).append("\":[");
        double[] values = fetchData.getValues(dataSource);
        for (int j = 0; j < values.length - 1; j++) {
            if (Double.compare(Double.NaN, values[j]) == 0) {
                result.append("null");
            } else {
                result.append(formatter.format(values[j]));
            }
            if (j < values.length - 2)
                result.append(',');
        }
        result.append(']');
        if (i < attrs.length - 1)
            result.append(',');
    }
    result.append("}");
    db.close();
    return result.toString();
}