From: Daira Hopwood <david-sarah@jacaranda.org>
Date: Fri, 10 May 2013 21:21:23 +0000 (+0100)
Subject: mutable/retrieve.py: inline the single-use function _remove_reader.
X-Git-Tag: allmydata-tahoe-1.10.1a1~246
X-Git-Url: https://git.rkrishnan.org/%5B/%5D%20/uri/frontends/%22doc.html/?a=commitdiff_plain;h=a74b09ec866ef547960c9fcc65f5908d351bf5cb;p=tahoe-lafs%2Ftahoe-lafs.git

mutable/retrieve.py: inline the single-use function _remove_reader.

A simple refactoring. Doesn't even require a new or updated unit test.

Author: Zooko O'Whielacronx <zooko@zooko.com>
Signed-off-by: Daira Hopwood <david-sarah@jacaranda.org>
---

diff --git a/src/allmydata/mutable/retrieve.py b/src/allmydata/mutable/retrieve.py
index b92e931f..26d1747b 100644
--- a/src/allmydata/mutable/retrieve.py
+++ b/src/allmydata/mutable/retrieve.py
@@ -527,40 +527,6 @@ class Retrieve:
                                           "indicate an uncoordinated write")
         # Otherwise, we're okay -- no issues.
 
-
-    def _remove_reader(self, reader):
-        """
-        At various points, we will wish to remove a server from
-        consideration and/or use. These include, but are not necessarily
-        limited to:
-
-            - A connection error.
-            - A mismatched prefix (that is, a prefix that does not match
-              our conception of the version information string).
-            - A failing block hash, salt hash, or share hash, which can
-              indicate disk failure/bit flips, or network trouble.
-
-        This method will do that. I will make sure that the
-        (shnum,reader) combination represented by my reader argument is
-        not used for anything else during this download. I will not
-        advise the reader of any corruption, something that my callers
-        may wish to do on their own.
-        """
-        # TODO: When you're done writing this, see if this is ever
-        # actually used for something that _mark_bad_share isn't. I have
-        # a feeling that they will be used for very similar things, and
-        # that having them both here is just going to be an epic amount
-        # of code duplication.
-        #
-        # (well, okay, not epic, but meaningful)
-        self.log("removing reader %s" % reader)
-        # Remove the reader from _active_readers
-        self._active_readers.remove(reader)
-        # TODO: self.readers.remove(reader)?
-        for shnum in list(self.remaining_sharemap.keys()):
-            self.remaining_sharemap.discard(shnum, reader.server)
-
-
     def _mark_bad_share(self, server, shnum, reader, f):
         """
         I mark the given (server, shnum) as a bad share, which means that it
@@ -585,14 +551,18 @@ class Retrieve:
                  (shnum, server.get_name()))
         prefix = self.verinfo[-2]
         self.servermap.mark_bad_share(server, shnum, prefix)
-        self._remove_reader(reader)
         self._bad_shares.add((server, shnum, f))
         self._status.add_problem(server, f)
         self._last_failure = f
+
+        # Remove the reader from _active_readers
+        self._active_readers.remove(reader)
+        for shnum in list(self.remaining_sharemap.keys()):
+            self.remaining_sharemap.discard(shnum, reader.server)
+
         if f.check(BadShareError):
             self.notify_server_corruption(server, shnum, str(f.value))
 
-
     def _download_current_segment(self):
         """
         I download, validate, decode, decrypt, and assemble the segment