Throw more informative error classes from perf.

diff --git a/pdm/perf.py b/pdm/perf.py
index 7c93c85..7c0d561 100644 (file)
--- a/pdm/perf.py
+++ b/pdm/perf.py
@@ -51,6 +51,13 @@ __all__ = ["attrinfo", "simpleattr", "valueattr", "eventobj",
            "staticdir", "event", "procevent", "startevent",
            "finishevent"]
 
+class error(Exception):
+    pass
+class nosuchname(LookupError, error):
+    pass
+class nosuchproto(error):
+    pass
+
 class attrinfo(object):
     """The return value of the `attrinfo' method on `attr' objects as
     described in L{pdm.srv.perf}.

diff --git a/pdm/srv.py b/pdm/srv.py
index 80f9a26..2ddb9e7 100644 (file)
--- a/pdm/srv.py
+++ b/pdm/srv.py
@@ -10,6 +10,7 @@ which describes the functioning of the REPL and PERF protocols.
 import os, sys, socket, threading, grp, select
 import types, pprint, traceback
 import pickle, struct
+from . import perf as mperf
 
 __all__ = ["repl", "perf", "listener", "unixlistener", "tcplistener", "listen"]
 
@@ -197,7 +198,7 @@ class perf(object):
 
     def bindob(self, id, ob):
         if not hasattr(ob, "pdm_protocols"):
-            raise ValueError("Object does not support PDM introspection")
+            raise mperf.nosuchname("Object does not support PDM introspection")
         try:
             proto = ob.pdm_protocols()
         except Exception as exc:
@@ -208,12 +209,12 @@ class perf(object):
     def bind(self, id, module, obnm):
         resmod = sys.modules.get(module)
         if resmod is None:
-            self.send("-", ImportError("No such module: %s" % module))
+            self.send("-", mperf.nosuchname("No such module: %s" % module))
             return
         try:
             ob = getattr(resmod, obnm)
         except AttributeError:
-            self.send("-", AttributeError("No such object: %s" % obnm))
+            self.send("-", mperf.nosuchname("No such object: %s" % obnm))
             return
         try:
             proto = self.bindob(id, ob)
@@ -229,7 +230,7 @@ class perf(object):
             return None
         ob, protos = ob
         if proto not in protos:
-            self.send("-", ValueError("Object does not support that protocol"))
+            self.send("-", mperf.nosuchproto("Object does not support that protocol: " + proto))
             return None
         return ob
 
@@ -240,7 +241,7 @@ class perf(object):
         try:
             ob = src.lookup(obnm)
         except KeyError as exc:
-            self.send("-", exc)
+            self.send("-", mperf.nosuchname(obnm))
             return
         try:
             proto = self.bindob(tgtid, ob)