Add message length to the packet

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1

Imported from previous forum

2

I am new to OPEN FAST development. I’m sending a logon message as follows.

	MessageTemplateLoader templateLoader = new XMLMessageTemplateLoader();
    MessageTemplate[] marketDataTemplateArray = templateLoader.load(new FileInputStream(templatesFile));
    String newPwd = pwd;
    MessageTemplate marketDataTemplate = templateLoader.getTemplateRegistry().get("Logon");
    templateLoader.getTemplateRegistry().register(1, marketDataTemplate);
    Message logonMessage = new Message(marketDataTemplate);
    logonMessage.setString("MsgType", "A");
    SimpleDateFormat df = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
    logonMessage.setString("SendingTime", df.format(new Date()));
    logonMessage.setInteger("HeartBtInt", 10);
    logonMessage.setString("UserName", "bobs");
    logonMessage.setString("Password", "abcd");
	MessageOutputStream outF = new MessageOutputStream(connection.getOutputStream());
    outF.registerTemplate(1, marketDataTemplate);
    outF.writeMessage(logonMessage);

But at the server reject the message telling ‘message doesn’t contain the message length’. I think reason is inside the OPEN FAST it doesn’t include the message length to the packet. Here is the first half of the bit representation of the logon message.

Input :

  1.        1              1  0  0  0  0  0  0  |0x40|    |64|       |0|         |@|

  2.        1              0  0  0  0  0  0  1  |0x1|      |1|         |1|         |N/A|

  3.        1              1  0  0  0  0  0  1  |0x41|    |65|       |-1|       |A|

  4.        0              0  1  1  0  0  1  0  |0x32|    |50|       |50|       |2|

  5.        0              0  1  1  0  0  0  0  |0x30|    |48|       |48|       |0|

  6.        0              0  1  1  0  0  0  1  |0x31|    |49|       |49|       |1|

  7.        0              0  1  1  0  0  0  1  |0x31|    |49|       |49|       |1|

can some one please help to add message length to the packet.

3

I think is solution is to add additional field to message to indicate the message length. To do that I need to get the byte length of the openfast.Message. Can some help me to do that…?