############################################################################## # # Zope Public License (ZPL) Version 1.0 # ------------------------------------- # # Copyright (c) Digital Creations. All rights reserved. # # This license has been certified as Open Source(tm). # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: # # 1. Redistributions in source code must retain the above copyright # notice, this list of conditions, and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions, and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # # 3. Digital Creations requests that attribution be given to Zope # in any manner possible. Zope includes a "Powered by Zope" # button that is installed by default. While it is not a license # violation to remove this button, it is requested that the # attribution remain. A significant investment has been put # into Zope, and this effort will continue if the Zope community # continues to grow. This is one way to assure that growth. # # 4. All advertising materials and documentation mentioning # features derived from or use of this software must display # the following acknowledgement: # # "This product includes software developed by Digital Creations # for use in the Z Object Publishing Environment # (http://www.zope.org/)." # # In the event that the product being advertised includes an # intact Zope distribution (with copyright and license included) # then this clause is waived. # # 5. Names associated with Zope or Digital Creations must not be used to # endorse or promote products derived from this software without # prior written permission from Digital Creations. # # 6. Modified redistributions of any form whatsoever must retain # the following acknowledgment: # # "This product includes software developed by Digital Creations # for use in the Z Object Publishing Environment # (http://www.zope.org/)." # # Intact (re-)distributions of any official Zope release do not # require an external acknowledgement. # # 7. Modifications are encouraged but must be packaged separately as # patches to official Zope releases. Distributions that do not # clearly separate the patches from the original work must be clearly # labeled as unofficial distributions. Modifications which do not # carry the name Zope may be packaged in any form, as long as they # conform to all of the clauses above. # # # Disclaimer # # THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY # EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # # # This software consists of contributions made by Digital Creations and # many individuals on behalf of Digital Creations. Specific # attributions are listed in the accompanying credits file. # ############################################################################## '''$Id: db.py,v 1.20 2002/03/14 20:24:54 adustman Exp $''' __version__='$Revision: 1.20 $'[11:-2] import _mysql import MySQLdb from _mysql_exceptions import OperationalError, NotSupportedError MySQLdb_version_required = (0,9,2) _v = getattr(_mysql, 'version_info', (0,0,0)) if _v < MySQLdb_version_required: raise NotSupportedError, \ "ZMySQLDA requires at least MySQLdb %s, %s found" % \ (MySQLdb_version_required, _v) from MySQLdb.converters import conversions from MySQLdb.constants import FIELD_TYPE, CR, CLIENT from Shared.DC.ZRDB.TM import TM from DateTime import DateTime from zLOG import LOG, ERROR, INFO import string, sys from string import strip, split, find, upper, rfind from time import time from thread import get_ident hosed_connection = ( CR.SERVER_GONE_ERROR, CR.SERVER_LOST ) key_types = { "PRI": "PRIMARY KEY", "MUL": "INDEX", "UNI": "UNIQUE", } field_icons = "bin", "date", "datetime", "float", "int", "text", "time" icon_xlate = { "varchar": "text", "char": "text", "enum": "what", "set": "what", "double": "float", "numeric": "float", "blob": "bin", "mediumblob": "bin", "longblob": "bin", "tinytext": "text", "mediumtext": "text", "longtext": "text", "timestamp": "datetime", "decimal": "float", "smallint": "int", "mediumint": "int", "bigint": "int", } type_xlate = { "double": "float", "numeric": "float", "decimal": "float", "smallint": "int", "mediumint": "int", "bigint": "int", "int": "int", "float": "float", "timestamp": "datetime", "datetime": "datetime", "time": "datetime", } def _mysql_timestamp_converter(s): if len(s) < 14: s = s + "0"*(14-len(s)) parts = map(int, (s[:4],s[4:6],s[6:8], s[8:10],s[10:12],s[12:14])) return DateTime("%04d-%02d-%02d %02d:%02d:%02d" % tuple(parts)) def DateTime_or_None(s): try: return DateTime(s) except: return None def int_or_long(s): try: return int(s) except: return long(s) FINISH_OR_ABORT_CALLED_ID = '_finish_or_abort_called' class DB(TM): Database_Connection=_mysql.connect Database_Error=_mysql.Error def Database_Connection(self, *args, **kwargs): return MySQLdb.connect(*args, **kwargs) defs={ FIELD_TYPE.CHAR: "i", FIELD_TYPE.DATE: "d", FIELD_TYPE.DATETIME: "d", FIELD_TYPE.DECIMAL: "n", FIELD_TYPE.DOUBLE: "n", FIELD_TYPE.FLOAT: "n", FIELD_TYPE.INT24: "i", FIELD_TYPE.LONG: "i", FIELD_TYPE.LONGLONG: "l", FIELD_TYPE.SHORT: "i", FIELD_TYPE.TIMESTAMP: "d", FIELD_TYPE.TINY: "i", FIELD_TYPE.YEAR: "i", } conv=conversions.copy() conv[FIELD_TYPE.LONG] = int_or_long conv[FIELD_TYPE.DATETIME] = DateTime_or_None conv[FIELD_TYPE.DATE] = DateTime_or_None conv[FIELD_TYPE.DECIMAL] = float del conv[FIELD_TYPE.TIME] _p_oid=_p_changed=_registered=None def __init__(self,connection): self.connection=connection self.kwargs = self._parse_connection_string(connection) self.db = {} db = self.getConnection() transactional = db.server_capabilities & CLIENT.TRANSACTIONS if self._try_transactions == '-': transactional = 0 elif not transactional and self._try_transactions == '+': raise NotSupportedError, "transactions not supported by this server" self._use_TM = self._transactions = transactional if self._mysql_lock: self._use_TM = 1 def forceReconnection(self): db = apply(self.Database_Connection, (), self.kwargs) self.db[get_ident()] = db return db def getConnection(self): ident = get_ident() db = self.db.get(ident) if db is None: db = self.forceReconnection() return db def closeConnection(self): ident = get_ident() db = self.db.get(ident) if db is not None: db.close() del self.db[ident] def _parse_connection_string(self, connection): kwargs = {'conv': self.conv} items = split(connection) self._use_TM = None if not items: return kwargs lockreq, items = items[0], items[1:] if lockreq[0] == "*": self._mysql_lock = lockreq[1:] db_host, items = items[0], items[1:] self._use_TM = 1 else: self._mysql_lock = None db_host = lockreq if '@' in db_host: db, host = split(db_host,'@',1) kwargs['db'] = db if ':' in host: host, port = split(host,':',1) kwargs['port'] = int(port) kwargs['host'] = host else: kwargs['db'] = db_host if kwargs['db'] and kwargs['db'][0] in ('+', '-'): self._try_transactions = kwargs['db'][0] kwargs['db'] = kwargs['db'][1:] else: self._try_transactions = None if not kwargs['db']: del kwargs['db'] if not items: return kwargs kwargs['user'], items = items[0], items[1:] if not items: return kwargs kwargs['passwd'], items = items[0], items[1:] if not items: return kwargs kwargs['unix_socket'], items = items[0], items[1:] return kwargs def tables(self, rdb=0, _care=('TABLE', 'VIEW')): r=[] a=r.append db = self.getConnection() db.query("SHOW TABLES") result = db.store_result() row = result.fetch_row(1) while row: a({'TABLE_NAME': row[0][0], 'TABLE_TYPE': 'TABLE'}) row = result.fetch_row(1) return r def columns(self, table_name): from string import join try: db = self.getConnection() db.query('SHOW COLUMNS FROM %s' % table_name) c = db.store_result() except: return () r=[] for Field, Type, Null, Key, Default, Extra in c.fetch_row(0): info = {} field_default = Default and "DEFAULT %s"%Default or '' if Default: info['Default'] = Default if '(' in Type: end = rfind(Type,')') short_type, size = split(Type[:end],'(',1) if short_type not in ('set','enum'): if ',' in size: info['Scale'], info['Precision'] = \ map(int, split(size,',',1)) else: info['Scale'] = int(size) else: short_type = Type if short_type in field_icons: info['Icon'] = short_type else: info['Icon'] = icon_xlate.get(short_type, "what") info['Name'] = Field info['Type'] = type_xlate.get(short_type,'string') info['Extra'] = Extra, info['Description'] = join([Type, field_default, Extra or '', key_types.get(Key, Key or ''), Null != 'YES' and 'NOT NULL' or '']), info['Nullable'] = (Null == 'YES') and 1 or 0 if Key: info['Index'] = 1 if Key == 'PRI': info['PrimaryKey'] = 1 info['Unique'] = 1 elif Key == 'UNI': info['Unique'] = 1 r.append(info) return r def query(self,query_string, max_rows=1000): self._use_TM and self._register() desc=None result=() db = self.getConnection() try: if 1: for qs in filter(None, map(strip,split(query_string, '\0'))): qtype = upper(split(qs, None, 1)[0]) if qtype == "SELECT" and max_rows: qs = "%s LIMIT %d" % (qs,max_rows) r=0 db.query(qs) c=db.store_result() if desc is not None: if c and (c.describe() != desc): raise 'Query Error', ( 'Multiple select schema are not allowed' ) if c: desc=c.describe() result=c.fetch_row(max_rows) else: desc=None except OperationalError, m: if m[0] not in hosed_connection: raise # Hm. maybe the db is hosed. Let's restart it. self.forceReconnection() return self.query(query_string, max_rows) if desc is None: return (),() items=[] func=items.append defs=self.defs for d in desc: item={'name': d[0], 'type': defs.get(d[1],"t"), 'width': d[2], 'null': d[6] } func(item) return items, result def string_literal(self, s): return self.getConnection().string_literal(s) def _begin(self, *ignored): try: db = self.getConnection() if self._transactions: db.query("BEGIN") db.store_result() if self._mysql_lock: db.query("SELECT GET_LOCK('%s',0)" % self._mysql_lock) db.store_result() except: LOG('ZMySQLDA', ERROR, "exception during _begin", error=sys.exc_info()) raise setattr(self, FINISH_OR_ABORT_CALLED_ID, False) def _finish(self, *ignored): if getattr(self, FINISH_OR_ABORT_CALLED_ID, False): return try: try: db = self.getConnection() if self._mysql_lock: db.query("SELECT RELEASE_LOCK('%s')" % self._mysql_lock) db.store_result() if self._transactions: db.query("COMMIT") db.store_result() except: LOG('ZMySQLDA', ERROR, "exception during _finish", error=sys.exc_info()) raise finally: setattr(self, FINISH_OR_ABORT_CALLED_ID, True) def _abort(self, *ignored): if getattr(self, FINISH_OR_ABORT_CALLED_ID, False): return try: db = self.getConnection() if self._mysql_lock: db.query("SELECT RELEASE_LOCK('%s')" % self._mysql_lock) db.store_result() if self._transactions: db.query("ROLLBACK") db.store_result() else: LOG('ZMySQLDA', ERROR, "aborting when non-transactional") finally: setattr(self, FINISH_OR_ABORT_CALLED_ID, True)