[MERGE]make readv(adjust_for_latency) work better at the end of files.

Robert Collins robertc at robertcollins.net
Tue Oct 2 06:46:34 BST 2007


This allows Transport.readv to work better at the end of files; I
cleaned up various bits of code on the way through:

  * Move transport logging into a new transport class
    TransportTraceDecorator (trace+ to get it from a url).
  * Give Registry a useful __repr__.
  * Fix a bug introduced by the change to use a Registry for transport
where
    the transport loading tests left global state behind due to the
    _get_protocol_handlers method returning a reference, not a value
object.
  * Add an upper_limit parameter to readv, because when asking for byte
    ranges within the latency-adjustment window near the end of the file
    causes errors that are tricky to manage.
  * A few minor drive-by formatting fixes.
  * The TransportDecorator constructor now accepts a _from_transport
    parameter for decorators that want to share state (used by the trace
    decorator)

-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
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