|
|
"""A TaskRecord backend using sqlite3"""
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import json
|
|
|
import os
|
|
|
import cPickle as pickle
|
|
|
from datetime import datetime
|
|
|
|
|
|
import sqlite3
|
|
|
|
|
|
from zmq.eventloop import ioloop
|
|
|
|
|
|
from IPython.utils.traitlets import Unicode, Instance, List
|
|
|
from .dictdb import BaseDB
|
|
|
from IPython.utils.jsonutil import date_default, extract_dates
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# SQLite operators, adapters, and converters
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
operators = {
|
|
|
'$lt' : "<",
|
|
|
'$gt' : ">",
|
|
|
# null is handled weird with ==,!=
|
|
|
'$eq' : "=",
|
|
|
'$ne' : "!=",
|
|
|
'$lte': "<=",
|
|
|
'$gte': ">=",
|
|
|
'$in' : ('=', ' OR '),
|
|
|
'$nin': ('!=', ' AND '),
|
|
|
# '$all': None,
|
|
|
# '$mod': None,
|
|
|
# '$exists' : None
|
|
|
}
|
|
|
null_operators = {
|
|
|
'=' : "IS NULL",
|
|
|
'!=' : "IS NOT NULL",
|
|
|
}
|
|
|
|
|
|
def _adapt_datetime(dt):
|
|
|
return dt.strftime(ISO8601)
|
|
|
|
|
|
def _convert_datetime(ds):
|
|
|
if ds is None:
|
|
|
return ds
|
|
|
else:
|
|
|
return datetime.strptime(ds, ISO8601)
|
|
|
|
|
|
def _adapt_dict(d):
|
|
|
return json.dumps(d, default=date_default)
|
|
|
|
|
|
def _convert_dict(ds):
|
|
|
if ds is None:
|
|
|
return ds
|
|
|
else:
|
|
|
return extract_dates(json.loads(ds))
|
|
|
|
|
|
def _adapt_bufs(bufs):
|
|
|
# this is *horrible*
|
|
|
# copy buffers into single list and pickle it:
|
|
|
if bufs and isinstance(bufs[0], (bytes, buffer)):
|
|
|
return sqlite3.Binary(pickle.dumps(map(bytes, bufs),-1))
|
|
|
elif bufs:
|
|
|
return bufs
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
def _convert_bufs(bs):
|
|
|
if bs is None:
|
|
|
return []
|
|
|
else:
|
|
|
return pickle.loads(bytes(bs))
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# SQLiteDB class
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class SQLiteDB(BaseDB):
|
|
|
"""SQLite3 TaskRecord backend."""
|
|
|
|
|
|
filename = Unicode('tasks.db', config=True,
|
|
|
help="""The filename of the sqlite task database. [default: 'tasks.db']""")
|
|
|
location = Unicode('', config=True,
|
|
|
help="""The directory containing the sqlite task database. The default
|
|
|
is to use the cluster_dir location.""")
|
|
|
table = Unicode("", config=True,
|
|
|
help="""The SQLite Table to use for storing tasks for this session. If unspecified,
|
|
|
a new table will be created with the Hub's IDENT. Specifying the table will result
|
|
|
in tasks from previous sessions being available via Clients' db_query and
|
|
|
get_result methods.""")
|
|
|
|
|
|
_db = Instance('sqlite3.Connection')
|
|
|
_keys = List(['msg_id' ,
|
|
|
'header' ,
|
|
|
'content',
|
|
|
'buffers',
|
|
|
'submitted',
|
|
|
'client_uuid' ,
|
|
|
'engine_uuid' ,
|
|
|
'started',
|
|
|
'completed',
|
|
|
'resubmitted',
|
|
|
'result_header' ,
|
|
|
'result_content' ,
|
|
|
'result_buffers' ,
|
|
|
'queue' ,
|
|
|
'pyin' ,
|
|
|
'pyout',
|
|
|
'pyerr',
|
|
|
'stdout',
|
|
|
'stderr',
|
|
|
])
|
|
|
|
|
|
def __init__(self, **kwargs):
|
|
|
super(SQLiteDB, self).__init__(**kwargs)
|
|
|
if not self.table:
|
|
|
# use session, and prefix _, since starting with # is illegal
|
|
|
self.table = '_'+self.session.replace('-','_')
|
|
|
if not self.location:
|
|
|
# get current profile
|
|
|
from IPython.core.newapplication import BaseIPythonApplication
|
|
|
if BaseIPythonApplication.initialized():
|
|
|
app = BaseIPythonApplication.instance()
|
|
|
if app.profile_dir is not None:
|
|
|
self.location = app.profile_dir.location
|
|
|
else:
|
|
|
self.location = u'.'
|
|
|
else:
|
|
|
self.location = u'.'
|
|
|
self._init_db()
|
|
|
|
|
|
# register db commit as 2s periodic callback
|
|
|
# to prevent clogging pipes
|
|
|
# assumes we are being run in a zmq ioloop app
|
|
|
loop = ioloop.IOLoop.instance()
|
|
|
pc = ioloop.PeriodicCallback(self._db.commit, 2000, loop)
|
|
|
pc.start()
|
|
|
|
|
|
def _defaults(self, keys=None):
|
|
|
"""create an empty record"""
|
|
|
d = {}
|
|
|
keys = self._keys if keys is None else keys
|
|
|
for key in keys:
|
|
|
d[key] = None
|
|
|
return d
|
|
|
|
|
|
def _init_db(self):
|
|
|
"""Connect to the database and get new session number."""
|
|
|
# register adapters
|
|
|
sqlite3.register_adapter(datetime, _adapt_datetime)
|
|
|
sqlite3.register_converter('datetime', _convert_datetime)
|
|
|
sqlite3.register_adapter(dict, _adapt_dict)
|
|
|
sqlite3.register_converter('dict', _convert_dict)
|
|
|
sqlite3.register_adapter(list, _adapt_bufs)
|
|
|
sqlite3.register_converter('bufs', _convert_bufs)
|
|
|
# connect to the db
|
|
|
dbfile = os.path.join(self.location, self.filename)
|
|
|
self._db = sqlite3.connect(dbfile, detect_types=sqlite3.PARSE_DECLTYPES,
|
|
|
# isolation_level = None)#,
|
|
|
cached_statements=64)
|
|
|
# print dir(self._db)
|
|
|
|
|
|
self._db.execute("""CREATE TABLE IF NOT EXISTS %s
|
|
|
(msg_id text PRIMARY KEY,
|
|
|
header dict text,
|
|
|
content dict text,
|
|
|
buffers bufs blob,
|
|
|
submitted datetime text,
|
|
|
client_uuid text,
|
|
|
engine_uuid text,
|
|
|
started datetime text,
|
|
|
completed datetime text,
|
|
|
resubmitted datetime text,
|
|
|
result_header dict text,
|
|
|
result_content dict text,
|
|
|
result_buffers bufs blob,
|
|
|
queue text,
|
|
|
pyin text,
|
|
|
pyout text,
|
|
|
pyerr text,
|
|
|
stdout text,
|
|
|
stderr text)
|
|
|
"""%self.table)
|
|
|
self._db.commit()
|
|
|
|
|
|
def _dict_to_list(self, d):
|
|
|
"""turn a mongodb-style record dict into a list."""
|
|
|
|
|
|
return [ d[key] for key in self._keys ]
|
|
|
|
|
|
def _list_to_dict(self, line, keys=None):
|
|
|
"""Inverse of dict_to_list"""
|
|
|
keys = self._keys if keys is None else keys
|
|
|
d = self._defaults(keys)
|
|
|
for key,value in zip(keys, line):
|
|
|
d[key] = value
|
|
|
|
|
|
return d
|
|
|
|
|
|
def _render_expression(self, check):
|
|
|
"""Turn a mongodb-style search dict into an SQL query."""
|
|
|
expressions = []
|
|
|
args = []
|
|
|
|
|
|
skeys = set(check.keys())
|
|
|
skeys.difference_update(set(self._keys))
|
|
|
skeys.difference_update(set(['buffers', 'result_buffers']))
|
|
|
if skeys:
|
|
|
raise KeyError("Illegal testing key(s): %s"%skeys)
|
|
|
|
|
|
for name,sub_check in check.iteritems():
|
|
|
if isinstance(sub_check, dict):
|
|
|
for test,value in sub_check.iteritems():
|
|
|
try:
|
|
|
op = operators[test]
|
|
|
except KeyError:
|
|
|
raise KeyError("Unsupported operator: %r"%test)
|
|
|
if isinstance(op, tuple):
|
|
|
op, join = op
|
|
|
|
|
|
if value is None and op in null_operators:
|
|
|
expr = "%s %s"%null_operators[op]
|
|
|
else:
|
|
|
expr = "%s %s ?"%(name, op)
|
|
|
if isinstance(value, (tuple,list)):
|
|
|
if op in null_operators and any([v is None for v in value]):
|
|
|
# equality tests don't work with NULL
|
|
|
raise ValueError("Cannot use %r test with NULL values on SQLite backend"%test)
|
|
|
expr = '( %s )'%( join.join([expr]*len(value)) )
|
|
|
args.extend(value)
|
|
|
else:
|
|
|
args.append(value)
|
|
|
expressions.append(expr)
|
|
|
else:
|
|
|
# it's an equality check
|
|
|
if sub_check is None:
|
|
|
expressions.append("%s IS NULL")
|
|
|
else:
|
|
|
expressions.append("%s = ?"%name)
|
|
|
args.append(sub_check)
|
|
|
|
|
|
expr = " AND ".join(expressions)
|
|
|
return expr, args
|
|
|
|
|
|
def add_record(self, msg_id, rec):
|
|
|
"""Add a new Task Record, by msg_id."""
|
|
|
d = self._defaults()
|
|
|
d.update(rec)
|
|
|
d['msg_id'] = msg_id
|
|
|
line = self._dict_to_list(d)
|
|
|
tups = '(%s)'%(','.join(['?']*len(line)))
|
|
|
self._db.execute("INSERT INTO %s VALUES %s"%(self.table, tups), line)
|
|
|
# self._db.commit()
|
|
|
|
|
|
def get_record(self, msg_id):
|
|
|
"""Get a specific Task Record, by msg_id."""
|
|
|
cursor = self._db.execute("""SELECT * FROM %s WHERE msg_id==?"""%self.table, (msg_id,))
|
|
|
line = cursor.fetchone()
|
|
|
if line is None:
|
|
|
raise KeyError("No such msg: %r"%msg_id)
|
|
|
return self._list_to_dict(line)
|
|
|
|
|
|
def update_record(self, msg_id, rec):
|
|
|
"""Update the data in an existing record."""
|
|
|
query = "UPDATE %s SET "%self.table
|
|
|
sets = []
|
|
|
keys = sorted(rec.keys())
|
|
|
values = []
|
|
|
for key in keys:
|
|
|
sets.append('%s = ?'%key)
|
|
|
values.append(rec[key])
|
|
|
query += ', '.join(sets)
|
|
|
query += ' WHERE msg_id == ?'
|
|
|
values.append(msg_id)
|
|
|
self._db.execute(query, values)
|
|
|
# self._db.commit()
|
|
|
|
|
|
def drop_record(self, msg_id):
|
|
|
"""Remove a record from the DB."""
|
|
|
self._db.execute("""DELETE FROM %s WHERE msg_id==?"""%self.table, (msg_id,))
|
|
|
# self._db.commit()
|
|
|
|
|
|
def drop_matching_records(self, check):
|
|
|
"""Remove a record from the DB."""
|
|
|
expr,args = self._render_expression(check)
|
|
|
query = "DELETE FROM %s WHERE %s"%(self.table, expr)
|
|
|
self._db.execute(query,args)
|
|
|
# self._db.commit()
|
|
|
|
|
|
def find_records(self, check, keys=None):
|
|
|
"""Find records matching a query dict, optionally extracting subset of keys.
|
|
|
|
|
|
Returns list of matching records.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
check: dict
|
|
|
mongodb-style query argument
|
|
|
keys: list of strs [optional]
|
|
|
if specified, the subset of keys to extract. msg_id will *always* be
|
|
|
included.
|
|
|
"""
|
|
|
if keys:
|
|
|
bad_keys = [ key for key in keys if key not in self._keys ]
|
|
|
if bad_keys:
|
|
|
raise KeyError("Bad record key(s): %s"%bad_keys)
|
|
|
|
|
|
if keys:
|
|
|
# ensure msg_id is present and first:
|
|
|
if 'msg_id' in keys:
|
|
|
keys.remove('msg_id')
|
|
|
keys.insert(0, 'msg_id')
|
|
|
req = ', '.join(keys)
|
|
|
else:
|
|
|
req = '*'
|
|
|
expr,args = self._render_expression(check)
|
|
|
query = """SELECT %s FROM %s WHERE %s"""%(req, self.table, expr)
|
|
|
cursor = self._db.execute(query, args)
|
|
|
matches = cursor.fetchall()
|
|
|
records = []
|
|
|
for line in matches:
|
|
|
rec = self._list_to_dict(line, keys)
|
|
|
records.append(rec)
|
|
|
return records
|
|
|
|
|
|
def get_history(self):
|
|
|
"""get all msg_ids, ordered by time submitted."""
|
|
|
query = """SELECT msg_id FROM %s ORDER by submitted ASC"""%self.table
|
|
|
cursor = self._db.execute(query)
|
|
|
# will be a list of length 1 tuples
|
|
|
return [ tup[0] for tup in cursor.fetchall()]
|
|
|
|
|
|
__all__ = ['SQLiteDB']
|
