#!/usr/bin/env python
# -*- coding: utf-8 -*-

from vendor.munin.mongodb import MuninMongoDBPlugin

class MongoDBLockRatio(MuninMongoDBPlugin):
    args = "-l 0 --base 1000"
    vlabel = "ratio"
    title = "MongoDB global lock time ratio"
    info = "How long the global lock has been held compared to the global execution time"
    fields = (
        ('lockratio', dict(
            label = "Global lock time ratio",
            info = "How long the global lock has been held compared to the global execution time",
            type = "GAUGE",
            min = "0",
        )),
    )

    def execute(self):
        status = self.connection.admin.command('serverStatus')
        try:
            value = float(status["globalLock"]["lockTime"])/float(status["globalLock"]["totalTime"])
        except KeyError:
            value = "U"
        return dict(lockratio=value)

if __name__ == "__main__":
    MongoDBLockRatio().run()