Method printThreadStats

src/tsd/StatsRpc.java:184–205

Grabs a snapshot of all JVM thread states and formats it in a manner to be displayed via API. @param query The query to respond to

(final HttpQuery query)

   * @param query The query to respond to
   */
  private void printThreadStats(final HttpQuery query) {
    final Set<Thread> threads = Thread.getAllStackTraces().keySet();
    final List<Map<String, Object>> output = 
        new ArrayList<Map<String, Object>>(threads.size());
    for (final Thread thread : threads) {
      final Map<String, Object> status = new HashMap<String, Object>();
      status.put("threadID", thread.getId());
      status.put("name", thread.getName());
      status.put("state", thread.getState().toString());
      status.put("interrupted", thread.isInterrupted());
      status.put("priority", thread.getPriority());

      final List<String> stack = 
          new ArrayList<String>(thread.getStackTrace().length);
      for (final StackTraceElement element: thread.getStackTrace()) {
        stack.add(element.toString());
      }
      status.put("stack", stack);
      output.add(status);
    }
    query.sendReply(query.serializer().formatThreadStatsV1(output));
  }
  
  /**
   * Yield (chiefly memory-related) stats about this OpenTSDB instance's JVM.