Velocity component

The Velocity component uses Apache Velocity that lets you template your body. Apache Velocity is a Java-based template engine that provides a template language to reference object and variables defined in the current context. In this case you can template your body with the header/environment variables of the current flow.

Configuration

The Velocity component has the following configuration options:

Property	Description
Template	The Velocity template that should be evaluated for each message passing through the component.

Remarks

• Be aware that the combination of the symbols # and * considers as the beginning of a comment section in the Velocity template language. a XML or JSON body will be truncated after #*. To prevent this use a replace component located before the velocity component.

Examples

This is an example of a Velocity template for a generic email.

Dear ${headers.lastName}, ${headers.firstName}

Thanks for the order of ${headers.item}.

Regards Dovetail
${bodyAs(String)}

You can also use this to compose error messages to return.

{
	"error": "Wrong Authorization-Token supplied!",
	"supplied_headers": [
		#foreach($header in $headers.entrySet())
		 {
		   "$header.key": "$header.value"
		 } #if( $foreach.hasNext ), #end
		#end
	]
}

The response would be generated like this:

{
  "error": "Wrong Authorization-Token supplied!",
  "supplied_headers": [
    {
      "Accept": "*/*"
    },
    {
      "Content-Type": "application/json"
    },
    {
      "Authorization-Token": "12345"
    },
    {
      "Cache-Control": "no-cache"
    }
}