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##############################################################################
# Copyright (c) 2015 EMC and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
from _sqlite3 import OperationalError
from threading import Lock
import calendar
import logging
import sqlite3
import time
import uuid
import requests
db_mutex = Lock()
class JobDB(object):
db_name = "StorPerfJob.db"
def __init__(self):
"""
Creates the StorPerfJob.db and jobs tables on demand
"""
self.logger = logging.getLogger(__name__)
self.logger.debug("Connecting to " + JobDB.db_name)
self.job_id = None
with db_mutex:
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
try:
cursor.execute('''CREATE TABLE jobs
(job_id text,
workload text,
start text,
end text)''')
self.logger.debug("Created job table")
except OperationalError:
self.logger.debug("Job table exists")
cursor.execute('SELECT * FROM jobs')
db.commit()
db.close()
def create_job_id(self):
"""
Returns a job id that is guaranteed to be unique in this
StorPerf instance.
"""
with db_mutex:
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
self.job_id = str(uuid.uuid4())
row = cursor.execute(
"select * from jobs where job_id = ?", (self.job_id,))
while (row.fetchone() is not None):
self.logger.info("Duplicate job id found, regenerating")
self.job_id = str(uuid.uuid4())
row = cursor.execute(
"select * from jobs where job_id = ?", (self.job_id,))
cursor.execute(
"insert into jobs(job_id) values (?)", (self.job_id,))
self.logger.debug("Reserved job id " + self.job_id)
db.commit()
db.close()
def start_workload(self, workload_name):
"""
Records the start time for the given workload
"""
with db_mutex:
if (self.job_id is None):
self.create_job_id()
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
now = str(calendar.timegm(time.gmtime()))
row = cursor.execute(
"""select * from jobs
where job_id = ?
and workload = ?""",
(self.job_id, workload_name,))
if (row.fetchone() is None):
cursor.execute(
"""insert into jobs
(job_id,
workload,
start)
values (?, ?, ?)""",
(self.job_id,
workload_name,
now,))
else:
self.logger.warn("Duplicate start time for workload "
+ workload_name)
cursor.execute(
"""update jobs set
job_id = ?,
start = ?
where workload = ?""",
(self.job_id,
now,
workload_name,))
db.commit()
db.close()
def end_workload(self, workload_name):
"""
Records the end time for the given workload
"""
with db_mutex:
if (self.job_id is None):
self.create_job_id()
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
now = str(calendar.timegm(time.gmtime()))
row = cursor.execute(
"""select * from jobs
where job_id = ?
and workload = ?""",
(self.job_id, workload_name,))
if (row.fetchone() is None):
self.logger.warn("No start time recorded for workload "
+ workload_name)
cursor.execute(
"""insert into jobs
(job_id,
workload,
start,
end)
values (?, ?, ?, ?)""",
(self.job_id,
workload_name,
now,
now))
else:
cursor.execute(
"""update jobs set
job_id = ?,
end = ?
where workload = ?""",
(self.job_id,
now,
workload_name,))
db.commit()
db.close()
def fetch_results(self, workload_prefix=""):
if (workload_prefix is None):
workload_prefix = ""
workload_prefix = workload_prefix + "%"
stats = ()
start_time = str(calendar.timegm(time.gmtime()))
end_time = "0"
self.logger.debug("Workload like: " + workload_prefix)
with db_mutex:
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
cursor.execute("""select start, end, workload
from jobs where workload like ?""",
(workload_prefix,))
while (True):
row = cursor.fetchone()
if (row is None):
break
start_time = str(row[0])
end_time = str(row[1])
workload = str(row[2])
# for most of these stats, we just want the final one
# as that is cumulative average or whatever for the whole
# run
self.logger.info("workload=" + workload +
"start=" + start_time + " end=" + end_time)
request = 'http://127.0.0.1:8000/render/?target=*.' + self.job_id + \
'.' + workload + '.jobs.1.*.clat.mean&format=json&from=' + \
start_time + "&until=" + end_time
response = requests.get(request)
if (response.status_code == 200):
data = response.json()
print data
else:
pass
db.close()
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