/usr/share/pyshared/ZEO/monitor.py is in python-zodb 1:3.9.7-2.
This file is owned by root:root, with mode 0o644.
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#
# Copyright (c) 2003 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
"""Monitor behavior of ZEO server and record statistics.
$Id: monitor.py 113733 2010-06-21 15:32:58Z ctheune $
"""
import asyncore
import socket
import time
import types
import logging
import ZEO
zeo_version = 'unknown'
try:
import pkg_resources
except ImportError:
pass
else:
zeo_dist = pkg_resources.working_set.find(
pkg_resources.Requirement.parse('ZODB3')
)
if zeo_dist is not None:
zeo_version = zeo_dist.version
class StorageStats:
"""Per-storage usage statistics."""
def __init__(self, connections=None):
self.connections = connections
self.loads = 0
self.stores = 0
self.commits = 0
self.aborts = 0
self.active_txns = 0
self.verifying_clients = 0
self.lock_time = None
self.conflicts = 0
self.conflicts_resolved = 0
self.start = time.ctime()
@property
def clients(self):
return len(self.connections)
def parse(self, s):
# parse the dump format
lines = s.split("\n")
for line in lines:
field, value = line.split(":", 1)
if field == "Server started":
self.start = value
elif field == "Clients":
# Hack because we use this both on the server and on
# the client where there are no connections.
self.connections = [0] * int(value)
elif field == "Clients verifying":
self.verifying_clients = int(value)
elif field == "Active transactions":
self.active_txns = int(value)
elif field == "Commit lock held for":
# This assumes
self.lock_time = time.time() - int(value)
elif field == "Commits":
self.commits = int(value)
elif field == "Aborts":
self.aborts = int(value)
elif field == "Loads":
self.loads = int(value)
elif field == "Stores":
self.stores = int(value)
elif field == "Conflicts":
self.conflicts = int(value)
elif field == "Conflicts resolved":
self.conflicts_resolved = int(value)
def dump(self, f):
print >> f, "Server started:", self.start
print >> f, "Clients:", self.clients
print >> f, "Clients verifying:", self.verifying_clients
print >> f, "Active transactions:", self.active_txns
if self.lock_time:
howlong = time.time() - self.lock_time
print >> f, "Commit lock held for:", int(howlong)
print >> f, "Commits:", self.commits
print >> f, "Aborts:", self.aborts
print >> f, "Loads:", self.loads
print >> f, "Stores:", self.stores
print >> f, "Conflicts:", self.conflicts
print >> f, "Conflicts resolved:", self.conflicts_resolved
class StatsClient(asyncore.dispatcher):
def __init__(self, sock, addr):
asyncore.dispatcher.__init__(self, sock)
self.buf = []
self.closed = 0
def close(self):
self.closed = 1
# The socket is closed after all the data is written.
# See handle_write().
def write(self, s):
self.buf.append(s)
def writable(self):
return len(self.buf)
def readable(self):
return 0
def handle_write(self):
s = "".join(self.buf)
self.buf = []
n = self.socket.send(s)
if n < len(s):
self.buf.append(s[:n])
if self.closed and not self.buf:
asyncore.dispatcher.close(self)
class StatsServer(asyncore.dispatcher):
StatsConnectionClass = StatsClient
def __init__(self, addr, stats):
asyncore.dispatcher.__init__(self)
self.addr = addr
self.stats = stats
if type(self.addr) == types.TupleType:
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
else:
self.create_socket(socket.AF_UNIX, socket.SOCK_STREAM)
self.set_reuse_addr()
logger = logging.getLogger('ZEO.monitor')
logger.info("listening on %s", repr(self.addr))
self.bind(self.addr)
self.listen(5)
def writable(self):
return 0
def readable(self):
return 1
def handle_accept(self):
try:
sock, addr = self.accept()
except socket.error:
return
f = self.StatsConnectionClass(sock, addr)
self.dump(f)
f.close()
def dump(self, f):
print >> f, "ZEO monitor server version %s" % zeo_version
print >> f, time.ctime()
print >> f
L = self.stats.keys()
L.sort()
for k in L:
stats = self.stats[k]
print >> f, "Storage:", k
stats.dump(f)
print >> f
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