[Zodb-checkins] CVS: StandaloneZODB/ZODB - BaseStorage.py:1.16.8.3

[Jeremy Hylton]

Update of /cvs-repository/StandaloneZODB/ZODB
In directory cvs.zope.org:/tmp/cvs-serv7219/ZODB

Modified Files:
      Tag: Standby-branch
	BaseStorage.py 
Log Message:
Add isReadOnly() method and implementation thereof.

Reformat a bunch of methods so the body is on a separate line from the
def.


=== StandaloneZODB/ZODB/BaseStorage.py 1.16.8.2 => 1.16.8.3 ===
     _serial=z64       # Transaction serial number
     _tstatus=' '      # Transaction status, used for copying data
+    _is_read_only = 0
 
     def __init__(self, name, base=None):
         
@@ -57,15 +58,24 @@
             raise POSException.StorageTransactionError(self, transaction)
         return []
 
-    def close(self): pass
+    def close(self):
+        pass
 
-    def getName(self): return self.__name__
-    def getSize(self): return len(self)*300 # WAG!
-    def history(self, oid, version, length=1): pass
+    def getName(self):
+        return self.__name__
+    
+    def getSize(self):
+        return len(self)*300 # WAG!
+    
+    def history(self, oid, version, length=1):
+        pass
                     
-    def modifiedInVersion(self, oid): return ''
+    def modifiedInVersion(self, oid):
+        return ''
 
     def new_oid(self, last=None):
+        if self._is_read_only:
+            raise POSException.ReadOnlyError()
         if last is None:
             self._lock_acquire()
             try:
@@ -81,10 +91,17 @@
             if d < 255: return last[:-1]+chr(d+1)+'\0'*(8-len(last))
             else:       return self.new_oid(last[:-1])
 
-    def registerDB(self, db, limit): pass # we don't care
+    def registerDB(self, db, limit):
+        pass # we don't care
 
-    def supportsUndo(self): return 0
-    def supportsVersions(self): return 0
+    def isReadOnly(self):
+        return self._is_read_only
+    
+    def supportsUndo(self):
+        return 0
+    
+    def supportsVersions(self):
+        return 0
         
     def tpc_abort(self, transaction):
         self._lock_acquire()
@@ -173,15 +190,22 @@
         pass
 
     def undo(self, transaction_id):
+        if self._is_read_only:
+            raise POSException.ReadOnlyError()
         raise POSException.UndoError, 'non-undoable transaction'
 
-    def undoLog(self, first, last, filter=None): return ()
+    def undoLog(self, first, last, filter=None):
+        return ()
 
-    def versionEmpty(self, version): return 1
+    def versionEmpty(self, version):
+        return 1
 
-    def versions(self, max=None): return ()
+    def versions(self, max=None):
+        return ()
 
-    def pack(self, t, referencesf): pass
+    def pack(self, t, referencesf):
+        if self._is_read_only:
+            raise POSException.ReadOnlyError()
 
     def getSerial(self, oid):
         self._lock_acquire()