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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQCPP-261) Handle Multibyte Strings or Strings encoded in Charsets other than US-ASCII
Date Wed, 02 Sep 2009 21:15:12 GMT
Handle Multibyte Strings or Strings encoded in Charsets other than US-ASCII
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                 Key: AMQCPP-261
                 URL: https://issues.apache.org/activemq/browse/AMQCPP-261
             Project: ActiveMQ C++ Client
          Issue Type: Improvement
          Components: CMS Impl, Decaf, Openwire
    Affects Versions: 3.0.1
            Reporter: Timothy Bish
            Assignee: Timothy Bish


The CMS API defines the interface for Strings in the TextMessage using the C++ std::string
and const char* primitives and doesn't consider character encodings in its interface or the
use of multibyte string representations.  

In order to allow the use of Strings between Java and C++ and .NET clients the strings in
the TextMessage as well as those in MapMessage, StreamMessage, and BytesMessage (when wreiteUTF
and readUTF are called) as well as message properties of the string type are encoded in the
JAVA standard Modified UTF-8 format for serialized strings.  This design makes the assumption
that strings passed are in US-ASCII format and that the strings from the broker are also encoded
with no char values greater than 255 and throws an exception if one is encountered.  

The CMS interface needs to be extended to allow for more flexible string handling and offer
a mechanism to deal with string encodings other than ASCII. 

Another alternative is to change the assumption about strings in the CMS API to assume that
all string are given as either ASCII strings with chars < 127 and no embedded nulls or
are already encoded by the user as Modified UTF-8 by the user so that a Java or .NET client
can read all strings sent in CMS Messages as well.





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