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tomcat.chart.py
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# -*- coding: utf-8 -*-
# Description: tomcat netdata python.d module
# Author: Pawel Krupa (paulfantom)
# Author: Wei He (Wing924)
# SPDX-License-Identifier: GPL-3.0-or-later
import xml.etree.ElementTree as ET
import re
from bases.FrameworkServices.UrlService import UrlService
MiB = 1 << 20
# Regex fix for Tomcat single quote XML attributes
# affecting Tomcat < 8.5.24 & 9.0.2 running with Java > 9
# cf. https://bz.apache.org/bugzilla/show_bug.cgi?id=61603
single_quote_regex = re.compile(r"='([^']+)'([^']+)''")
ORDER = [
'accesses',
'bandwidth',
'processing_time',
'threads',
'jvm',
'jvm_eden',
'jvm_survivor',
'jvm_tenured',
]
CHARTS = {
'accesses': {
'options': [None, 'Requests', 'requests/s', 'statistics', 'tomcat.accesses', 'area'],
'lines': [
['requestCount', 'accesses', 'incremental'],
['errorCount', 'errors', 'incremental'],
]
},
'bandwidth': {
'options': [None, 'Bandwidth', 'KiB/s', 'statistics', 'tomcat.bandwidth', 'area'],
'lines': [
['bytesSent', 'sent', 'incremental', 1, 1024],
['bytesReceived', 'received', 'incremental', 1, 1024],
]
},
'processing_time': {
'options': [None, 'processing time', 'seconds', 'statistics', 'tomcat.processing_time', 'area'],
'lines': [
['processingTime', 'processing time', 'incremental', 1, 1000]
]
},
'threads': {
'options': [None, 'Threads', 'current threads', 'statistics', 'tomcat.threads', 'area'],
'lines': [
['currentThreadCount', 'current', 'absolute'],
['currentThreadsBusy', 'busy', 'absolute']
]
},
'jvm': {
'options': [None, 'JVM Memory Pool Usage', 'MiB', 'memory', 'tomcat.jvm', 'stacked'],
'lines': [
['free', 'free', 'absolute', 1, MiB],
['eden_used', 'eden', 'absolute', 1, MiB],
['survivor_used', 'survivor', 'absolute', 1, MiB],
['tenured_used', 'tenured', 'absolute', 1, MiB],
['code_cache_used', 'code cache', 'absolute', 1, MiB],
['compressed_used', 'compressed', 'absolute', 1, MiB],
['metaspace_used', 'metaspace', 'absolute', 1, MiB],
]
},
'jvm_eden': {
'options': [None, 'Eden Memory Usage', 'MiB', 'memory', 'tomcat.jvm_eden', 'area'],
'lines': [
['eden_used', 'used', 'absolute', 1, MiB],
['eden_committed', 'committed', 'absolute', 1, MiB],
['eden_max', 'max', 'absolute', 1, MiB]
]
},
'jvm_survivor': {
'options': [None, 'Survivor Memory Usage', 'MiB', 'memory', 'tomcat.jvm_survivor', 'area'],
'lines': [
['survivor_used', 'used', 'absolute', 1, MiB],
['survivor_committed', 'committed', 'absolute', 1, MiB],
['survivor_max', 'max', 'absolute', 1, MiB],
]
},
'jvm_tenured': {
'options': [None, 'Tenured Memory Usage', 'MiB', 'memory', 'tomcat.jvm_tenured', 'area'],
'lines': [
['tenured_used', 'used', 'absolute', 1, MiB],
['tenured_committed', 'committed', 'absolute', 1, MiB],
['tenured_max', 'max', 'absolute', 1, MiB]
]
}
}
class Service(UrlService):
def __init__(self, configuration=None, name=None):
UrlService.__init__(self, configuration=configuration, name=name)
self.order = ORDER
self.definitions = CHARTS
self.url = self.configuration.get('url', 'http://127.0.0.1:8080/manager/status?XML=true')
self.connector_name = self.configuration.get('connector_name', None)
self.parse = self.xml_parse
def xml_parse(self, data):
try:
return ET.fromstring(data)
except ET.ParseError:
self.debug('%s is not a valid XML page. Please add "?XML=true" to tomcat status page.' % self.url)
return None
def xml_single_quote_fix_parse(self, data):
data = single_quote_regex.sub(r"='\g<1>\g<2>'", data)
return self.xml_parse(data)
def check(self):
self._manager = self._build_manager()
raw_data = self._get_raw_data()
if not raw_data:
return False
if single_quote_regex.search(raw_data):
self.warning('Tomcat status page is returning invalid single quote XML, please consider upgrading '
'your Tomcat installation. See https://bz.apache.org/bugzilla/show_bug.cgi?id=61603')
self.parse = self.xml_single_quote_fix_parse
return self.parse(raw_data) is not None
def _get_data(self):
"""
Format data received from http request
:return: dict
"""
data = None
raw_data = self._get_raw_data()
if raw_data:
xml = self.parse(raw_data)
if xml is None:
return None
data = {}
jvm = xml.find('jvm')
connector = None
if self.connector_name:
for conn in xml.findall('connector'):
if self.connector_name in conn.get('name'):
connector = conn
break
else:
connector = xml.find('connector')
memory = jvm.find('memory')
data['free'] = memory.get('free')
data['total'] = memory.get('total')
for pool in jvm.findall('memorypool'):
name = pool.get('name')
if 'Eden Space' in name:
data['eden_used'] = pool.get('usageUsed')
data['eden_committed'] = pool.get('usageCommitted')
data['eden_max'] = pool.get('usageMax')
elif 'Survivor Space' in name:
data['survivor_used'] = pool.get('usageUsed')
data['survivor_committed'] = pool.get('usageCommitted')
data['survivor_max'] = pool.get('usageMax')
elif 'Tenured Gen' in name or 'Old Gen' in name:
data['tenured_used'] = pool.get('usageUsed')
data['tenured_committed'] = pool.get('usageCommitted')
data['tenured_max'] = pool.get('usageMax')
elif name == 'Code Cache':
data['code_cache_used'] = pool.get('usageUsed')
data['code_cache_committed'] = pool.get('usageCommitted')
data['code_cache_max'] = pool.get('usageMax')
elif name == 'Compressed':
data['compressed_used'] = pool.get('usageUsed')
data['compressed_committed'] = pool.get('usageCommitted')
data['compressed_max'] = pool.get('usageMax')
elif name == 'Metaspace':
data['metaspace_used'] = pool.get('usageUsed')
data['metaspace_committed'] = pool.get('usageCommitted')
data['metaspace_max'] = pool.get('usageMax')
if connector is not None:
thread_info = connector.find('threadInfo')
data['currentThreadsBusy'] = thread_info.get('currentThreadsBusy')
data['currentThreadCount'] = thread_info.get('currentThreadCount')
request_info = connector.find('requestInfo')
data['processingTime'] = request_info.get('processingTime')
data['requestCount'] = request_info.get('requestCount')
data['errorCount'] = request_info.get('errorCount')
data['bytesReceived'] = request_info.get('bytesReceived')
data['bytesSent'] = request_info.get('bytesSent')
return data or None