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index 9393aef84cf2bb60817cb473c77e0af6d443e86b..287b2abdbab421638fff89691351e95b0bbb45ec 100644 (file)
# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#
-#$Id: back_bsddb3.py,v 1.10 2001-11-21 02:34:18 richard Exp $
+#$Id: back_bsddb3.py,v 1.13 2002-07-08 06:41:03 richard Exp $
import bsddb3, os, marshal
-from roundup import hyperdb, date, password
+from roundup import hyperdb, date
+
+# these classes are so similar, we just use the anydbm methods
+import back_anydbm
#
# Now the database
#
-class Database(hyperdb.Database):
+class Database(back_anydbm.Database):
"""A database for storing records containing flexible data types."""
-
- def __init__(self, storagelocator, journaltag=None):
- """Open a hyperdatabase given a specifier to some storage.
-
- The meaning of 'storagelocator' depends on the particular
- implementation of the hyperdatabase. It could be a file name,
- a directory path, a socket descriptor for a connection to a
- database over the network, etc.
-
- The 'journaltag' is a token that will be attached to the journal
- entries for any edits done on the database. If 'journaltag' is
- None, the database is opened in read-only mode: the Class.create(),
- Class.set(), and Class.retire() methods are disabled.
- """
- self.dir, self.journaltag = storagelocator, journaltag
- self.classes = {}
-
- #
- # Classes
- #
- def __getattr__(self, classname):
- """A convenient way of calling self.getclass(classname)."""
- return self.classes[classname]
-
- def addclass(self, cl):
- cn = cl.classname
- if self.classes.has_key(cn):
- raise ValueError, cn
- self.classes[cn] = cl
-
- def getclasses(self):
- """Return a list of the names of all existing classes."""
- l = self.classes.keys()
- l.sort()
- return l
-
- def getclass(self, classname):
- """Get the Class object representing a particular class.
-
- If 'classname' is not a valid class name, a KeyError is raised.
- """
- return self.classes[classname]
-
#
# Class DBs
#
def clear(self):
for cn in self.classes.keys():
db = os.path.join(self.dir, 'nodes.%s'%cn)
- bsddb3.btopen(db, 'c')
+ bsddb3.btopen(db, 'n')
db = os.path.join(self.dir, 'journals.%s'%cn)
- bsddb3.btopen(db, 'c')
+ bsddb3.btopen(db, 'n')
def getclassdb(self, classname, mode='r'):
''' grab a connection to the class db that will be used for
else:
return bsddb3.btopen(path, 'c')
- #
- # Nodes
- #
- def addnode(self, classname, nodeid, node):
- ''' add the specified node to its class's db
- '''
- db = self.getclassdb(classname, 'c')
- # now save the marshalled data
- db[nodeid] = marshal.dumps(node)
- db.close()
- setnode = addnode
-
- def getnode(self, classname, nodeid, cldb=None):
- ''' add the specified node to its class's db
- '''
- db = cldb or self.getclassdb(classname)
- if not db.has_key(nodeid):
- raise IndexError, nodeid
- res = marshal.loads(db[nodeid])
- if not cldb: db.close()
- return res
-
- def hasnode(self, classname, nodeid, cldb=None):
- ''' add the specified node to its class's db
+ def _opendb(self, name, mode):
+ '''Low-level database opener that gets around anydbm/dbm
+ eccentricities.
'''
- db = cldb or self.getclassdb(classname)
- res = db.has_key(nodeid)
- if not cldb: db.close()
- return res
-
- def countnodes(self, classname, cldb=None):
- db = cldb or self.getclassdb(classname)
- return len(db.keys())
- if not cldb: db.close()
- return res
+ if __debug__:
+ print >>hyperdb.DEBUG, self, '_opendb', (self, name, mode)
+ # determine which DB wrote the class file
+ path = os.path.join(os.getcwd(), self.dir, name)
+ if not os.path.exists(path):
+ if __debug__:
+ print >>hyperdb.DEBUG, "_opendb bsddb3.open(%r, 'c')"%path
+ return bsddb3.btopen(path, 'c')
- def getnodeids(self, classname, cldb=None):
- db = cldb or self.getclassdb(classname)
- res = db.keys()
- if not cldb: db.close()
- return res
+ # open the database with the correct module
+ if __debug__:
+ print >>hyperdb.DEBUG, "_opendb bsddb3.open(%r, %r)"%(path, mode)
+ return bsddb3.btopen(path, mode)
#
# Journal
#
- def addjournal(self, classname, nodeid, action, params):
- ''' Journal the Action
- 'action' may be:
-
- 'create' or 'set' -- 'params' is a dictionary of property values
- 'link' or 'unlink' -- 'params' is (classname, nodeid, propname)
- 'retire' -- 'params' is None
- '''
- entry = (nodeid, date.Date().get_tuple(), self.journaltag, action,
- params)
- db = bsddb3.btopen(os.path.join(self.dir, 'journals.%s'%classname), 'c')
- if db.has_key(nodeid):
- s = db[nodeid]
- l = marshal.loads(db[nodeid])
- l.append(entry)
- else:
- l = [entry]
- db[nodeid] = marshal.dumps(l)
- db.close()
-
def getjournal(self, classname, nodeid):
''' get the journal for id
'''
try:
db = bsddb3.btopen(os.path.join(self.dir, 'journals.%s'%classname),
'r')
- except bsddb3.error, error:
- if error.args[0] != 2: raise
+ except bsddb3.NoSuchFileError:
return []
# mor handling of bad journals
if not db.has_key(nodeid): return []
journal = marshal.loads(db[nodeid])
res = []
for entry in journal:
- (nodeid, date_stamp, self.journaltag, action, params) = entry
+ (nodeid, date_stamp, user, action, params) = entry
date_obj = date.Date(date_stamp)
- res.append((nodeid, date_obj, self.journaltag, action, params))
+ res.append((nodeid, date_obj, user, action, params))
db.close()
return res
- def close(self):
- ''' Close the Database - we must release the circular refs so that
- we can be del'ed and the underlying bsddb connections closed
- cleanly.
- '''
- self.classes = {}
+ def _doSaveJournal(self, classname, nodeid, action, params):
+ # serialise first
+ if action in ('set', 'create'):
+ params = self.serialise(classname, params)
+ entry = (nodeid, date.Date().get_tuple(), self.journaltag, action,
+ params)
- #
- # Basic transaction support
- #
- # TODO: well, write these methods (and then use them in other code)
- def register_action(self):
- ''' Register an action to the transaction undo log
- '''
+ if __debug__:
+ print >>hyperdb.DEBUG, '_doSaveJournal', entry
- def commit(self):
- ''' Commit the current transaction, start a new one
- '''
+ db = bsddb3.btopen(os.path.join(self.dir, 'journals.%s'%classname), 'c')
- def rollback(self):
- ''' Reverse all actions from the current transaction
- '''
+ if db.has_key(nodeid):
+ s = db[nodeid]
+ l = marshal.loads(s)
+ l.append(entry)
+ else:
+ l = [entry]
+
+ db[nodeid] = marshal.dumps(l)
+ db.close()
#
#$Log: not supported by cvs2svn $
+#Revision 1.12 2002/05/21 05:52:11 richard
+#Well whadya know, bsddb3 works again.
+#The backend is implemented _exactly_ the same as bsddb - so there's no
+#using its transaction or locking support. It'd be nice to use those some
+#day I suppose.
+#
+#Revision 1.11 2002/01/14 02:20:15 richard
+# . changed all config accesses so they access either the instance or the
+# config attriubute on the db. This means that all config is obtained from
+# instance_config instead of the mish-mash of classes. This will make
+# switching to a ConfigParser setup easier too, I hope.
+#
+#At a minimum, this makes migration a _little_ easier (a lot easier in the
+#0.5.0 switch, I hope!)
+#
+#Revision 1.10 2001/11/21 02:34:18 richard
+#Added a target version field to the extended issue schema
+#
#Revision 1.9 2001/10/09 23:58:10 richard
#Moved the data stringification up into the hyperdb.Class class' get, set
#and create methods. This means that the data is also stringified for the