Examples of edu.berkeley.xtrace.XTraceMetadata

edu.berkeley.xtrace.XTraceMetadata
A tracing context, containing the X-Trace metadata that is propagated along a computation chain. This consists of three parts: a TaskID that is common for the task (see {@link TaskID}), an OpID that is the ID of an event in the computation chain, and a set of options (see {@link OptionField}). This XTraceMetadata object must be passed from host to host and thread to thread to capture chains of computation. The {@link XTraceContext} class contains staticutility functions for maintaining a per-thread context. @author George Porter

  void receiveReport(String msg) {
    Matcher matcher = XTRACE_LINE.matcher(msg);
    if (matcher.find()) {
      Report r = Report.createFromString(msg);
      String xtraceLine = matcher.group(1);
      XTraceMetadata meta = XTraceMetadata.createFromString(xtraceLine);


      if (meta.getTaskId() != null) {
        TaskID task = meta.getTaskId();
        String taskId = task.toString().toUpperCase();
        BufferedWriter fout = fileCache.getHandle(task);
        if (fout == null) {
          LOG
              .warn("Discarding a report due to internal fileCache error: "

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    private void sendReport() {
      TaskID id = taskList.get()[rnd.nextInt(taskList.get().length)];
      
      Report r = new Report();
      r.put("X-Trace", new XTraceMetadata(id, 0).toString());
      r.put("Time", (new Date().toString()));
      r.put("Key1", "Value1");
      r.put("Key2", "Value2");
      r.put("Key3", "Value3.1");
      r.put("Key3", "Value3.2");

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  }


  @Test
  public void testGetMetadata() {
    TaskID task = new TaskID(8);
    XTraceMetadata md = new XTraceMetadata(task, 0);
    
    Report r = new Report();
    r.put("X-Trace", md.toString());
    r.put("Key1", "Value1");
    r.put("Key2", "Value2");
    
    assertEquals(md, r.getMetadata());
    
    r = new Report();
    r.put("Key1", "Value1");
    r.put("X-Trace", md.toString());
    r.put("Key2", "Value2");
    
    assertEquals(md, r.getMetadata());
  }

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  }


  @Test
  public void testToString() {
    Report r = new Report();
    XTraceMetadata xtr = new XTraceMetadata();
    r.put("X-Trace", xtr.toString());
    r.put("Key1", "Value1");
    r.put("Key2", "Value2");
    r.put("Key4", "Value4.1");
    r.put("Key4", "Value4.2");
    r.put("Key4", "Value4.3");

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      for (int i = 0; i < numKeys; i++) {
        report.put("Key"+i, randomString(10 + r.nextInt(20)));
      }
      report.put("Timestamp", ""+System.currentTimeMillis());
      report.put("Sequence", ""+numSent++);
      report.put("X-Trace", new XTraceMetadata(task, r.nextInt()).toString());
      report.put("Tag", "loadtest");
      report.put("Title", "Load Test");
      return report;
    }

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