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From "Marcel Casado (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-3388) Http/https protocol uses Xstream for serializing commands in xml. Field additions to the commands bresks xtream serializacion between amq versions
Date Sun, 03 Jul 2011 07:08:21 GMT
Http/https protocol uses Xstream for serializing commands in xml. Field additions to the commands
bresks xtream serializacion between amq versions 
---------------------------------------------------------------------------------------------------------------------------------------------------

                 Key: AMQ-3388
                 URL: https://issues.apache.org/jira/browse/AMQ-3388
             Project: ActiveMQ
          Issue Type: Improvement
          Components: Transport
    Affects Versions: 5.5.0, 5.4.2, 5.4.1
            Reporter: Marcel Casado


Addition of fields in commands used between clients and brokers in newer amq versions breaks
easily the http transport that uses xstream for xml serialization. 

The make xstream more tolerant to this changes between version in org.apache.activemq.transport.xstream.XStreamWireFormat
we could add the code below so xstream ignores unknown fields :

  // Implementation methods
    // -------------------------------------------------------------------------
    protected XStream createXStream() {
       // return new XStream();

       return new XStream() {

            protected MapperWrapper wrapMapper(MapperWrapper next) {
                return new MapperWrapper(next) {

                    public boolean shouldSerializeMember(Class definedIn, String fieldName)
{
                        return definedIn != Object.class ? super.shouldSerializeMember(definedIn,
fieldName) : false;
                    }

                };
            }

        };

    }

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