Creating a new message by using a JavaCompute node

In the template code, the default constructor of MbMessage is called to create a blank message, as shown in the following Java™ code:

MbMessage outMessage = new MbMessage();  

The headers can be copied from the incoming message by using the supplied utility method, copyMessageHeaders(), as shown in this Java code:

copyMessageHeaders(inMessage, outMessage);

The new message body can now be created. First, add the top level parser element. For XML, this is:

MbElement outRoot = outMessage.getRootElement();
MbElement outBody = outRoot.createElementAsLastChild(MbXMLNSC.PARSER_NAME);

The remainder of the message can then be built up by using the createElement methods and the extended syntax of the integration node XPath implementation.

When you want to create a BLOB message, that is handled as a single byte string by using the BLOB parser domain. The message data is added as a byte array to the single element named "BLOB" under the parser level element, described as follows:

String myMsg = "The Message Data";
MbElement outRoot = outMessage.getRootElement();
// Create the Integration Bus Blob Parser element
MbElement outParser = outRoot.createElementAsLastChild(MbBLOB.PARSER_NAME);
// Create the BLOB element in the Blob parser domain with the required text
MbElement outBody = outParser.createElementAsLastChild(MbElement.TYPE_NAME_VALUE, "BLOB", myMsg.getBytes());

You can use the following code to create a BLOB message in a JavaCompute node:

 MbElement outMsgRootEl = outMessage.getRootElement();
 
 String parserName = MbBLOB.PARSER_NAME;
 String messageType = "";
 String messageSet = "";
 String messageFormat = "";
 int encoding = 0;
 int ccsid = 0;
 int options = 0;
 outMsgRootEl.createElementAsLastChildFromBitstream(responseBodyXmlData,
   parserName, messageType, messageSet, messageFormat, encoding, ccsid,
   options);