The ZebraTester Java API also contains classes and methods which allow direct access to all measured values stored within a statistics result file of a load test run (-prxres file).
Usage & Examples
This enables you to create your own extracts and/or compilations from the measured data. The main entry point to access these data is the method PerformanceData.readObjectFromFile(<result file name>)
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Extracting Performance Data
The following programming example extracts the most important performance data of the web pages and the URL calls.
Code
import java.io.*; import dfischer.utils.PerformanceData; import dfischer.utils.PerformanceDataRecord; public class AnalyzeResult { public static void main(String[] args) { try { // read result file from disk PerformanceData performanceData = new PerformanceData(); performanceData.readObjectFromFile(args[0]); PerformanceDataRecord[] performanceDataRecord = performanceData.getPerformanceDataRecord(); // display overall data System.out.println("users = " + performanceData.getParallelUsers()); System.out.println("test duration = " + (performanceData.getTestDurationMillis() / 1000) + " seconds"); System.out.println("hits per second = " + performanceData.getWebTransactionRate()); System.out.println("passed loops = " + performanceData.getPassedLoops()); System.out.println("failed loops = " + performanceData.getFailedLoops()); System.out.println("average response time per page = " + ((float)performanceData.getAveragePageTime() / 1000.0f) + " seconds"); System.out.println("average network connect time per URL call = " + performanceData.getAverageNetworkEstablishTime() + " milliseconds"); System.out.println(""); // display page data int[] pageBreakIndex = performanceData.getPageBreakIndexes(); for (int x = 0; x < pageBreakIndex.length; x++) { String pageName = performanceDataRecord[pageBreakIndex[x]].getInfoText(); long pageResponseTime = performanceData.getPageTime(pageBreakIndex[x]); // get all url calls per page int[] urlIndexesOfPage = performanceData.getValidUrlIndexesOfPage(pageBreakIndex[x]); // calculate average size of page long pageSize = 0; long pageTime = 0; long cumulatedPageSize = 0; for (int y = 0; y < urlIndexesOfPage.length; y++) { PerformanceDataRecord urlDataRecord = performanceDataRecord[urlIndexesOfPage[y]]; pageSize = pageSize + urlDataRecord.getAverageSize(); pageTime = pageTime + urlDataRecord.getAverageTime(); cumulatedPageSize = cumulatedPageSize + urlDataRecord.getTotalSize(); } System.out.println(pageName + "; size = " + pageSize + " bytes; time = " + ((float) pageTime / 1000.0f) + " seconds; total transmitted bytes over all calls = " + cumulatedPageSize); } System.out.println(""); // loop over all measured url calls and page breaks for (int x = 0; x < performanceDataRecord.length; x++) { switch (performanceDataRecord[x].getDataType()) { case PerformanceDataRecord.TYPE_PERFORMANCE_DATA: long urlSize = performanceDataRecord[x].getAverageSize(); long urlTime = performanceDataRecord[x].getAverageTime(); long cumulatedUrlSize = performanceDataRecord[x].getTotalSize(); System.out.println(performanceDataRecord[x].getInfoText() + "; size = " + urlSize + " bytes; time = " + ((float) urlTime / 1000.0f) + " seconds; total transmitted bytes = " + cumulatedUrlSize); break; case PerformanceDataRecord.TYPE_PAGE_BREAK: System.out.println(performanceDataRecord[x].getInfoText()); break; default: break; } } } catch (Exception e) { e.printStackTrace(); } } }
Extracting Error Snapshots
The following programming example extracts all received content data of error snapshots taken (malformed web pages), and stores them in files so they can be displayed later in the web browser:
Code
import java.io.FileOutputStream; import dfischer.utils.PerformanceData; import dfischer.utils.PerformanceDataRecord; import dfischer.utils.PerformanceDataRecordFailureInfo; import dfischer.utils.HttpTestURL; /** * Writes the response content of all error snapshots to files if they contain ASCII (HTML,XML) data. * Program Argument: name of the result file (*.prxres). */ public class ExtractErrors { public static void main(String[] args) { try { // read result file from disk PerformanceData performanceData = new PerformanceData(); performanceData.readObjectFromFile(args[0]); // loop over all measured url calls and page breaks PerformanceDataRecord[] performanceDataRecord = performanceData.getPerformanceDataRecord(); for (int x = 0; x < performanceDataRecord.length; x++) { switch (performanceDataRecord[x].getDataType()) { case PerformanceDataRecord.TYPE_PERFORMANCE_DATA: // loop over all error snapshots per url call PerformanceDataRecordFailureInfo[] failureInfo = performanceDataRecord[x].getFailureInfo(); for (int y = 0; y < failureInfo.length; y++) { // get data of failed url call HttpTestURL testURL = performanceDataRecord[x].getFailedUrl(failureInfo[y]); if (testURL != null) { // now we have access to all frozen url data String fileStartName = "url_" + x + "_error_" + (y + 1); // write response content to file - no binary data are written if (testURL.isAsciiContent()) { FileOutputStream fout = new FileOutputStream(fileStartName + "_response_content.html"); fout.write(testURL.getDecompressedContent()); fout.close(); } } } break; case PerformanceDataRecord.TYPE_PAGE_BREAK: break; default: break; } } } catch (Exception e) { e.printStackTrace(); } } }