About MessageOUT

A MessageOUT Process sends output to a MessageIN Event (see About MessageIN). The configuration tool for this type of Process is the MessageOUT tool.

When to use MessageOUT Processes

The MessageOUT Process makes it possible to extend the processing chain over multiple StreamServers. The MessageOUT Process is always used together with a MessageIN Event.

Example 1

Extending the processing chain over two StreamServers

The first figure illustrates a processing chain in one StreamServer.

The second figure illustrates the same processing chain distributed over two StreamServers.

 

No device driver

When you configure an output connector for MessageOUT output, do not specify any device driver (use option No Device).

Code pages

If you specify a code page for the output connector, the same code page will be used as the XML encoding declaration in the header of the XML document. For example:

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

SXD file

The output data structure must be described in an SXD file, and this file must be made available to the corresponding MessageIN Event. See Generating the MessageOUT SXD file.

Processing instruction

You can specify a processing instruction that will be added to the output data. See Specifying a processing instruction.

Variables

If you want to transfer variables from the MessageOUT instance to the MessageIN instance, you must enable the use of variables. See Enabling the use of variables.