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From "Pavel Moravec" <pmora...@redhat.com>
Subject Re: Review Request 22630: [QPID-5823]: Python client should create a node with name starting '#'
Date Fri, 04 Jul 2014 10:48:25 GMT

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(Updated July 4, 2014, 10:48 a.m.)

Review request for qpid, Alan Conway, Gordon Sim, Kenneth Giusti, and Rafael Schloming.


New patch proposal, with Alan's idea of MangledString class implemented (it gets really easier,

Bugs: QPID-5823

Repository: qpid


The easiest "solution" would be to do the "mangling" in parse_address method in driver.py
(see original https://svn.apache.org/r1602820 I reverted). That prevents any application to
get proper node address ('#' expanded).

So the '#' expansion needs to be done in endpoints.py and the information "address is expanded"
needs to be passed to parse_address method. Either using [Sender|Receiver].mangled boolean
(like in attached patch) or Sender.target / Receiver.source could be a double (address_string,
mangled), like _mangle method returns in the patch. I don't know what approach (or some combination)
is better.

FYI C++ client has similar code:

    if (qpid::messaging::AddressImpl::isTemporary(a) && createPolicy.isVoid()) {
        createPolicy = "always";
        Opt specified = Opt(a)/NODE/X_DECLARE;
        if (!specified.hasKey(AUTO_DELETE)) autoDelete = true;
        if (!specified.hasKey(EXCLUSIVE)) exclusive = true;

where isTemporary(a)==true iff node name starts with '#'.

Diffs (updated)

  /trunk/qpid/python/qpid/messaging/driver.py 1607804 
  /trunk/qpid/python/qpid/messaging/endpoints.py 1607804 

Diff: https://reviews.apache.org/r/22630/diff/


Automated tests passed.

Manual test passed as well:

$ drain "#q; {node: {durable:true}}" -t 2 & qpid-stat -q
[1] 25174
c17af530-6cd8-462d-b8e8-5e4b6c9d50f8#q; {node: {durable:true}}
  queue                                     dur  autoDel  excl  msg   msgIn  msgOut  bytes
 bytesIn  bytesOut  cons  bind
  af192c4d-b2a0-47c3-8dd4-e99f400da51d:0.0       Y        Y        0     0      0       0
     0        0         1     2
  c17af530-6cd8-462d-b8e8-5e4b6c9d50f8#q    Y    Y        Y        0     0      0       0
     0        0         1     1

(the same for spout)

receiver / producer is able to print expanded address (see the "c17af530-6cd8-462d-b8e8-5e4b6c9d50f8#q;
{node: {durable:true}}" line).


Pavel Moravec

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