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Implementing user-defined extensions
Create the resources for your user-defined extension. You can write user-defined nodes in C or Java™, or you can use a subflow to create a node. You can write user-defined parsers and exits only in C.
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For user-defined nodes only, you must create a WebSphere Message Broker Toolkit Eclipse plug-in. For user-defined nodes created in Java and C, you must also create the run time .lil or .jar file. The WebSphere Message Broker Toolkit plug-in adds the user-defined node to the node palette in the Message Flow editor, so that you can include the new node in message flows. This additional task is described in Creating the user interface representation of a user-defined node in the WebSphere Message Broker Toolkit. This step is not required for user-defined parsers or exits.