vpp_papi: Add custom exceptions.

This patchset adds and raises the following custom exception classes:

* class VPPApiError(Exception):
* class VPPNotImplementedError(NotImplementedError):
* class VPPIOError(IOError):
* class VPPRuntimeError(RuntimeError):
* class VPPValueError(ValueError):

* class VPPSerializerValueError(ValueError):

* class VPPStatsIOError(IOError):
* class VPPStatsClientLoadError(RuntimeError):

* class VppTransportShmemIOError(IOError):

* class VppTransportSocketIOError(IOError)

Change-Id: Ia40900fd2dcef148d01125d6c691329fc666901e
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
index 49e565980f2..393e2e9c9c1 100644
--- a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
+++ b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
@@ -13,7 +13,13 @@ except ImportError:
 import logging
 
 
+class VppTransportSocketIOError(IOError):
+    pass
+
+
 class VppTransport(object):
+    VppTransportSocketIOError = VppTransportSocketIOError
+
     def __init__(self, parent, read_timeout, server_address):
         self.connected = False
         self.read_timeout = read_timeout if read_timeout > 0 else 1
@@ -59,7 +65,8 @@ class VppTransport(object):
                     else:
                         self.parent.msg_handler_async(msg)
                 else:
-                    raise IOError(2, 'Unknown response from select')
+                    raise VppTransportSocketIOError(
+                        2, 'Unknown response from select')
 
     def connect(self, name, pfx, msg_handler, rx_qlen):
 
@@ -87,7 +94,7 @@ class VppTransport(object):
         msg = self._read()
         hdr, length = self.parent.header.unpack(msg, 0)
         if hdr.msgid != 16:
-            raise IOError('Invalid reply message')
+            raise VppTransportSocketIOError('Invalid reply message')
 
         r, length = sockclnt_create_reply.unpack(msg)
         self.socket_index = r.index
@@ -136,7 +143,7 @@ class VppTransport(object):
     def write(self, buf):
         """Send a binary-packed message to VPP."""
         if not self.connected:
-            raise IOError(1, 'Not connected')
+            raise VppTransportSocketIOError(1, 'Not connected')
 
         # Send header
         header = self.header.pack(0, len(buf), 0)
@@ -177,7 +184,7 @@ class VppTransport(object):
 
     def read(self):
         if not self.connected:
-            raise IOError(1, 'Not connected')
+            raise VppTransportSocketIOError(1, 'Not connected')
         try:
             return self.q.get(True, self.read_timeout)
         except queue.Empty: