python.d/tomcat.chart.py

   1 # -*- coding: utf-8 -*-
   2 # Description: tomcat netdata python.d module
   3 # Author: Pawel Krupa (paulfantom)
   4
   5 # Python version higher than 2.7 is needed to run this module.
   6
   7 from base import UrlService
   8 import xml.etree.ElementTree as ET  # phone home...
   9
  10 # default module values (can be overridden per job in `config`)
  11 # update_every = 2
  12 priority = 60000
  13 retries = 60
  14
  15 # charts order (can be overridden if you want less charts, or different order)
  16 ORDER = ['accesses', 'volume', 'threads', 'jvm']
  17
  18 CHARTS = {
  19     'accesses': {
  20         'options': [None, "tomcat requests", "requests/s", "statistics", "tomcat.accesses", "area"],
  21         'lines': [
  22             ["accesses"]
  23         ]},
  24     'volume': {
  25         'options': [None, "tomcat volume", "KB/s", "volume", "tomcat.volume", "area"],
  26         'lines': [
  27             ["volume", None, 'incremental']
  28         ]},
  29     'threads': {
  30         'options': [None, "tomcat threads", "current threads", "statistics", "tomcat.threads", "line"],
  31         'lines': [
  32             ["current", None, "absolute"],
  33             ["busy", None, "absolute"]
  34         ]},
  35     'jvm': {
  36         'options': [None, "JVM Free Memory", "MB", "statistics", "tomcat.jvm", "area"],
  37         'lines': [
  38             ["jvm", None, "absolute"]
  39         ]}
  40 }
  41
  42
  43 class Service(UrlService):
  44     def __init__(self, configuration=None, name=None):
  45         UrlService.__init__(self, configuration=configuration, name=name)
  46         if len(self.url) == 0:
  47             self.url = "http://localhost:8080/manager/status?XML=true"
  48         self.order = ORDER
  49         self.definitions = CHARTS
  50         # get port from url
  51         self.port = 0
  52         for i in self.url.split('/'):
  53             try:
  54                 int(i[-1])
  55                 self.port = i.split(':')[-1]
  56                 break
  57             except:
  58                 pass
  59         if self.port == 0:
  60             self.port = 80
  61
  62     def _get_data(self):
  63         """
  64         Format data received from http request
  65         :return: dict
  66         """
  67         try:
  68             raw = self._get_raw_data()
  69             data = ET.fromstring(raw)
  70             memory = data.find('./jvm/memory')
  71             threads = data.find("./connector[@name='\"http-bio-" + str(self.port) + "\"']/threadInfo")
  72             requests = data.find("./connector[@name='\"http-bio-" + str(self.port) + "\"']/requestInfo")
  73
  74             return {'accesses': requests.attrib['requestCount'],
  75                     'volume': requests.attrib['bytesSent'],
  76                     'current': threads.attrib['currentThreadCount'],
  77                     'busy': threads.attrib['currentThreadsBusy'],
  78                     'jvm': memory.attrib['free']}
  79         except (ValueError, AttributeError):
  80             return None
  81         except SyntaxError as e:
  82             self.error("Tomcat module needs python 2.7 at least. Stopping")
  83             self.debug(str(e))
  84         except Exception as e:
  85             self.debug(str(e))