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From "Alex Rudyy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-3285) AMQShortString needs only be used in a transport layer for 0.8/0.9.x AMQP protocol implementations.
Date Fri, 27 May 2011 16:47:47 GMT
AMQShortString needs only be used in a transport layer for 0.8/0.9.x AMQP protocol implementations.
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                 Key: QPID-3285
                 URL: https://issues.apache.org/jira/browse/QPID-3285
             Project: Qpid
          Issue Type: Improvement
          Components: Java Broker, Java Broker MessageStore - DerbyStore, Java Client, Java
Common
            Reporter: Alex Rudyy
            Assignee: Robbie Gemmell
            Priority: Minor


Current implementation of AMQShortString does not deal properly with unicode characters. Each
character of the string is  converted into a single byte using the following transformation

(byte) (0xFF & data[i])

In result of such transformation multi-byte characters can not be passed over the wire with
0.8/0.9.x AMQP protocol implementations.

AMQP 0.10 transport layer  does not have such issue because it does not use string byte buffers
from AMQShortString objects.

AMQP 1.0 specification does not declare short string type. So, current implementation of AMQShortString
can not be used to implement AMQP 1.0 specification. For implementing of AMQP 1.0 specification
java.lang.String class can be used.

Current broker and client implementations use AMQShortString classes everywhere, including
JMS layer, message store layer etc.

Usages of AMQShortString beyond 0.8/0.9.x transport layers should be replaced with  java.lang.String
class. Only  0.8/0.9.x transport layers require AMQShortString for keeping backward compatibility.



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