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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
##############################################################################
import calendar
import logging
from sqlite3 import OperationalError
import sqlite3
from threading import Lock
import time
import uuid
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")
try:
cursor.execute('''CREATE TABLE job_params
(job_id text,
param text,
value text)''')
self.logger.debug("Created job_params table")
except OperationalError:
self.logger.debug("Job params table exists")
try:
cursor.execute('''CREATE TABLE job_summary
(job_id text,
summary text)''')
self.logger.debug("Created job table")
except OperationalError:
self.logger.debug("Job table exists")
cursor.execute('SELECT * FROM jobs')
cursor.execute('SELECT * FROM job_params')
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):
"""
Records the start time for the given workload
"""
workload_name = workload.fullname
if (self.job_id is None):
self.create_job_id()
with db_mutex:
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 %s"
% 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):
"""
Records the end time for the given workload
"""
if (self.job_id is None):
self.create_job_id()
workload_name = workload.fullname
with db_mutex:
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 %s"
% 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_workloads(self, workload):
workload_prefix = workload + "%"
workload_executions = []
with db_mutex:
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
cursor.execute("""select workload, start, end
from jobs where workload like ?""",
(workload_prefix,))
while (True):
row = cursor.fetchone()
if (row is None):
break
workload_execution = [row[0], row[1], row[2]]
workload_executions.append(workload_execution)
db.close()
return workload_executions
def record_workload_params(self, params):
"""
"""
if (self.job_id is None):
self.create_job_id()
with db_mutex:
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
for param, value in params.iteritems():
cursor.execute(
"""insert into job_params
(job_id,
param,
value)
values (?, ?, ?)""",
(self.job_id,
param,
value,))
db.commit()
db.close()
def fetch_workload_params(self, job_id):
"""
"""
params = {}
with db_mutex:
db = sqlite3.connect(JobDB.db_name)
cursor = db.cursor()
cursor.execute(
"select param, value from job_params where job_id = ?",
(job_id,))
while (True):
row = cursor.fetchone()
if (row is None):
break
params[row[0]] = row[1]
db.close()
return params
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