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# -*- test-case-name: twisted.runner.test.test_procmontap -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Support for creating a service which runs a process monitor.
"""
from typing import List, Sequence
from twisted.python import usage
from twisted.runner.procmon import ProcessMonitor
class Options(usage.Options):
"""
Define the options accepted by the I{twistd procmon} plugin.
"""
synopsis = "[procmon options] commandline"
optParameters = [
[
"threshold",
"t",
1,
"How long a process has to live "
"before the death is considered instant, in seconds.",
float,
],
[
"killtime",
"k",
5,
"How long a process being killed "
"has to get its affairs in order before it gets killed "
"with an unmaskable signal.",
float,
],
[
"minrestartdelay",
"m",
1,
"The minimum time (in "
"seconds) to wait before attempting to restart a "
"process",
float,
],
[
"maxrestartdelay",
"M",
3600,
"The maximum time (in "
"seconds) to wait before attempting to restart a "
"process",
float,
],
]
optFlags: List[Sequence[str]] = []
longdesc = """\
procmon runs processes, monitors their progress, and restarts them when they
die.
procmon will not attempt to restart a process that appears to die instantly;
with each "instant" death (less than 1 second, by default), it will delay
approximately twice as long before restarting it. A successful run will reset
the counter.
Eg twistd procmon sleep 10"""
def parseArgs(self, *args):
"""
Grab the command line that is going to be started and monitored
"""
self["args"] = args
def postOptions(self):
"""
Check for dependencies.
"""
if len(self["args"]) < 1:
raise usage.UsageError("Please specify a process commandline")
def makeService(config):
s = ProcessMonitor()
s.threshold = config["threshold"]
s.killTime = config["killtime"]
s.minRestartDelay = config["minrestartdelay"]
s.maxRestartDelay = config["maxrestartdelay"]
s.addProcess(" ".join(config["args"]), config["args"])
return s
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