Example usage for org.apache.commons.math.stat.descriptive StorelessUnivariateStatistic getResult

Introduction

In this page you can find the example usage for org.apache.commons.math.stat.descriptive StorelessUnivariateStatistic getResult.

Prototype

double getResult();

Source Link

Document

Returns the current value of the Statistic.

Usage

From source file:net.sf.katta.tool.loadtest.LoadTestMasterOperation.java

@Override
public void nodeOperationsComplete(MasterContext context, List<OperationResult> nodeResults) throws Exception {
    try {/*from w w w.j ava 2 s  .com*/
        final int queryRate = calculateCurrentQueryRate();
        LOG.info("collecting results for iteration " + _currentIteration + " and query rate " + queryRate
                + " after " + (System.currentTimeMillis() - _currentIterationStartTime) + " ms ...");
        List<LoadTestQueryResult> queryResults = new ArrayList<LoadTestQueryResult>();
        for (OperationResult operationResult : nodeResults) {
            if (operationResult == null || operationResult.getUnhandledException() != null) {
                Exception rootException = null;
                if (operationResult != null) {
                    rootException = operationResult.getUnhandledException();
                }
                throw new IllegalStateException(
                        "at least one node operation did not completed properly: " + nodeResults,
                        rootException);
            }
            LoadTestNodeOperationResult nodeOperationResult = (LoadTestNodeOperationResult) operationResult;
            queryResults.addAll(nodeOperationResult.getQueryResults());
        }
        LOG.info("Received " + queryResults.size() + " queries, expected " + queryRate * _runTime / 1000);

        File statisticsFile = new File(_resultDir, "load-test-log-" + _startTime + ".log");
        File resultsFile = new File(_resultDir, "load-test-results-" + _startTime + ".log");
        Writer statisticsWriter = new OutputStreamWriter(new FileOutputStream(statisticsFile, true));
        Writer resultWriter = new OutputStreamWriter(new FileOutputStream(resultsFile, true));
        if (_currentIteration == 0) {
            // print headers
            statisticsWriter.append("#queryRate \tnode \tstartTime \tendTime \telapseTime \tquery \n");
            resultWriter.append(
                    "#requestedQueryRate \tachievedQueryRate \tfiredQueries \tqueryErrors \tavarageQueryDuration \tstandardDeviation  \n");
        }
        try {
            StorelessUnivariateStatistic timeStandardDeviation = new StandardDeviation();
            StorelessUnivariateStatistic timeMean = new Mean();
            int errors = 0;

            for (LoadTestQueryResult result : queryResults) {
                long elapsedTime = result.getEndTime() > 0 ? result.getEndTime() - result.getStartTime() : -1;
                statisticsWriter.write(queryRate + "\t" + result.getNodeId() + "\t" + result.getStartTime()
                        + "\t" + result.getEndTime() + "\t" + elapsedTime + "\t" + result.getQuery() + "\n");
                if (elapsedTime != -1) {
                    timeStandardDeviation.increment(elapsedTime);
                    timeMean.increment(elapsedTime);
                } else {
                    ++errors;
                }
            }
            resultWriter.write(queryRate + "\t" + ((double) queryResults.size() / (_runTime / 1000)) + "\t"
                    + queryResults.size() + "\t" + errors + "\t" + (int) timeMean.getResult() + "\t"
                    + (int) timeStandardDeviation.getResult() + "\n");
        } catch (IOException e) {
            throw new IllegalStateException("Failed to write statistics data.", e);
        }
        try {
            LOG.info("results written to " + resultsFile.getAbsolutePath());
            LOG.info("statistics written to " + statisticsFile.getAbsolutePath());
            statisticsWriter.close();
            resultWriter.close();
        } catch (IOException e) {
            LOG.warn("Failed to close statistics file.");
        }
        if (queryRate + _step <= _endRate) {
            _currentIteration++;
            LOG.info("triggering next iteration " + _currentIteration);
            context.getMasterQueue().add(this);
        } else {
            LOG.info("finish load test in iteration " + _currentIteration + " after "
                    + (System.currentTimeMillis() - _startTime) + " ms");
            context.getProtocol().removeFlag(getName());
        }
    } catch (Exception e) {
        context.getProtocol().removeFlag(getName());
    }
}

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