slap: update interface.

slapos/slap/interface/slap.py

@@ -35,6 +35,12 @@ class IException(Interface):
   Classes which implement IException are used to report errors.
   """
 
+class IConnectionError(IException):
+  """
+  Classes which implement IServerError are used to report a connection problem
+  to the slap server.
+  """
+
 class IServerError(IException):
   """
   Classes which implement IServerError are used to report unexpected error
@@ -164,6 +170,12 @@ class ISoftwareProductCollection(Interface):
     software_product, by querying SlapOS Master.
     """
 
+class ISoftwareInstance(Interface):
+  """
+  Classes which implement ISoftwareRelease are used by slap to represent
+  informations about a Software Instance.
+  """
+
 class IComputerPartition(IBuildoutController, IRequester):
   """
   Computer Partition interface specification

slapos/slap/slap.py

@@ -60,15 +60,6 @@ fallback_logger.addHandler(fallback_handler)
 
 DEFAULT_SOFTWARE_TYPE = 'RootSoftwareInstance'
 
-
-class AuthenticationError(Exception):
-  pass
-
-
-class ConnectionError(Exception):
-  pass
-
-
 class SlapDocument:
   def __init__(self, connection_helper=None):
     if connection_helper is not None:
@@ -197,6 +188,7 @@ class SoftwareInstance(SlapDocument):
   """
   Contains Software Instance information
   """
+  zope.interface.implements(interface.ISoftwareInstance)
 
   def __init__(self, **kwargs):
     """
@@ -207,20 +199,22 @@ class SoftwareInstance(SlapDocument):
 
 
 """Exposed exceptions"""
-
-
-# XXX Why do we need to expose exceptions?
 class ResourceNotReady(Exception):
   zope.interface.implements(interface.IResourceNotReady)
 
-
 class ServerError(Exception):
   zope.interface.implements(interface.IServerError)
 
-
 class NotFoundError(Exception):
   zope.interface.implements(interface.INotFoundError)
 
+class AuthenticationError(Exception):
+  pass
+
+
+class ConnectionError(Exception):
+  zope.interface.implements(interface.IConnectionError)
+
 
 class Supply(SlapDocument):
   zope.interface.implements(interface.ISupply)