C node implementation functions

The user-defined node implements a function interface for the integration node to call during runtime operation. This interface includes functions to create a local context whenever a node instance is created, functions to set and retrieve attribute values, the function to perform the processing of the node itself, and functions to examine messages.

The following functions are provided:

Mandatory function

cniCreateNodeContext

Optional and conditional functions

cniDeleteNodeContext
Either cniEvaluate (for message processing and output nodes), or cniRun (for input nodes)
cniGetAttribute
cniGetAttribute2
cniGetAttributeName
cniGetAttributeName2
cniSetAttribute

These implementation functions are called by the integration node, and implemented by the node.

For certain implementation functions, you might need to specify the name of a parser that is supplied with IBM® App Connect Enterprise. If so, you must use the correct class name of the parser. The following table provides a summary of the parsers, root element names, and class names for different headers.

Parser	Root element name	Class name
BLOB	BLOB	NONE
IDOC	IDOC	IDOC
JMSMap	JMSMap	JMS_MAP
JMSStream	JMSStream	JMS_STREAM
MIME	MIME	MIME
MQCFH	MQPCF	MQPCF
MQCIH	MQCIH	MQCICS
MQDLH	MQDLH	MQDEAD
MQIIH	MQIIH	MQIMS
MQMD	MQMD	MQHMD
MQMDE	MQMDE	MQHMDE
MQRFH	MQRFH	MQHRF
MQRFH2	MQRFH2	MQHRF2
MQRMH	MQRMH	MQHREF
MQSAPH	MQSAPH	MQHSAP
MQWIH	MQWIH	MQHWIH
MRM	MRM	MRM
Properties	Properties	PropertyParser
SMQ_BMH	SMQ_BMH	SMQBAD
XML	XML	xml
XMLNS	XMLNS	xmlns
XMLNSC	XMLNSC	xmlnsC