--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/roundup/backends/back_bsddb3.py	Thu Jan 09 22:59:22 2003 +0000
@@ -0,0 +1,108 @@
+#
+# Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
+# This module is free software, and you may redistribute it and/or modify
+# under the same terms as Python, so long as this copyright message and
+# disclaimer are retained in their original form.
+#
+# IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
+# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
+# OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE.  THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
+# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
+# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+# 
+#$Id: back_bsddb3.py,v 1.18 2002-10-03 06:56:29 richard Exp $
+'''
+This module defines a backend that saves the hyperdatabase in BSDDB3.
+'''
+
+import bsddb3, os, marshal
+from roundup import hyperdb, date
+
+# these classes are so similar, we just use the anydbm methods
+from back_anydbm import Database, Class, FileClass, IssueClass
+
+#
+# Now the database
+#
+class Database(Database):
+    """A database for storing records containing flexible data types."""
+    #
+    # Class DBs
+    #
+    def clear(self):
+        for cn in self.classes.keys():
+            db = os.path.join(self.dir, 'nodes.%s'%cn)
+            bsddb3.btopen(db, 'n')
+            db = os.path.join(self.dir, 'journals.%s'%cn)
+            bsddb3.btopen(db, 'n')
+
+    def getclassdb(self, classname, mode='r'):
+        ''' grab a connection to the class db that will be used for
+            multiple actions
+        '''
+        path = os.path.join(os.getcwd(), self.dir, 'nodes.%s'%classname)
+        if os.path.exists(path):
+            return bsddb3.btopen(path, mode)
+        else:
+            return bsddb3.btopen(path, 'c')
+
+    def opendb(self, name, mode):
+        '''Low-level database opener that gets around anydbm/dbm
+           eccentricities.
+        '''
+        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')
+
+        # 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 getjournal(self, classname, nodeid):
+        ''' get the journal for id
+        '''
+        # attempt to open the journal - in some rare cases, the journal may
+        # not exist
+        try:
+            db = bsddb3.btopen(os.path.join(self.dir, 'journals.%s'%classname),
+                'r')
+        except bsddb3._db.DBNoSuchFileError:
+            raise IndexError, 'no such %s %s'%(classname, nodeid)
+        # more handling of bad journals
+        if not db.has_key(nodeid):
+            raise IndexError, 'no such %s %s'%(classname, nodeid)
+        journal = marshal.loads(db[nodeid])
+        res = []
+        for entry in journal:
+            (nodeid, date_stamp, user, action, params) = entry
+            date_obj = date.Date(date_stamp)
+            res.append((nodeid, date_obj, user, action, params))
+        db.close()
+        return res
+
+    def getCachedJournalDB(self, classname):
+        ''' get the journal db, looking in our cache of databases for commit
+        '''
+        # get the database handle
+        db_name = 'journals.%s'%classname
+        if self.databases.has_key(db_name):
+            return self.databases[db_name]
+        else:
+            db = bsddb3.btopen(os.path.join(self.dir, db_name), 'c')
+            self.databases[db_name] = db
+            return db
+