From bde8f48176e9f85139c8731ee0de61964346e2ed Mon Sep 17 00:00:00 2001
From: Adeodato Simo <dato@google.com>
Date: Thu, 2 Dec 2010 13:03:47 +0000
Subject: [PATCH] opcodes: document OP_DSC_FIELD in OpCode and OpCode.Summary()

Signed-off-by: Adeodato Simo <dato@google.com>
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>
---
 lib/opcodes.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/opcodes.py b/lib/opcodes.py
index 931382808..d119f45a1 100644
--- a/lib/opcodes.py
+++ b/lib/opcodes.py
@@ -115,6 +115,9 @@ class OpCode(BaseOpCode):
 
   @cvar OP_ID: The ID of this opcode. This should be unique amongst all
                children of this class.
+  @cvar OP_DSC_FIELD: The name of a field whose value will be included in the
+                      string returned by Summary(); see the docstring of that
+                      method for details).
   @ivar dry_run: Whether the LU should be run in dry-run mode, i.e. just
                  the check steps
   @ivar priority: Opcode priority for queue
@@ -170,6 +173,11 @@ class OpCode(BaseOpCode):
   def Summary(self):
     """Generates a summary description of this opcode.
 
+    The summary is the value of the OP_ID attribute (without the "OP_" prefix),
+    plus the value of the OP_DSC_FIELD attribute, if one was defined; this field
+    should allow to easily identify the operation (for an instance creation job,
+    e.g., it would be the instance name).
+
     """
     # all OP_ID start with OP_, we remove that
     txt = self.OP_ID[3:]
-- 
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