New Runner - CSV

import com.eviware.loadui.api.events.PropertyEvent

createProperty( 'file', File, null )
createProperty( 'mode', String, 'Random' )

createInput( "input", "Incoming Messages" )
createOutput( "output", "Outgoing Messages" )

def values = file.value == null ? [] : file.value.readLines()

addEventListener( PropertyEvent ) { event ->
 if ( event.event == PropertyEvent.Event.VALUE ) {
  if( event.property == file ) {
   values = file.value == null ? [] : file.value.readLines()
  }
 }
}

onMessage = { incoming, outgoing, message ->
   if( values.size > 0 )
   {
    def url = ''
    
    if( mode.value == 'Random' )
    url = getNextRandom()
    else if( mode.value == 'Sequential' )
    url = getNextSequential()
    
    if( url != null && url.length() > 0 )
    message['URL'] = url
   }
   
   send( output, message )
}

getNextRandom = 
{
   def index = (int)( Math.random()*(float)values.size )
   return values[index]
}

def currentIndex = 0

getNextSequential =
{
   if( currentIndex >= values.size ) 
      currentIndex = 0
   
   return values[currentIndex++]
}

layout { 
 property( property:mode, label:'Mode', options:['Random','Sequential'] )
 separator(vertical:true)
    property( property:file, label:"File", constraints: 'w 200!', style: '-fx-font-size: 13pt' ) 
}