gistfile1.xml

<service name="ftp-file-requester">
  <inbound>
    <inbound-endpoint ref="select-ftp-file" responseTimeout="30000" />
  </inbound>
  <script:component>
    <script:script engine="groovy">
      <script:text>
        def ftpEndpointBuilder = muleContext.registry.lookupEndpointFactory().getEndpointBuilder("ftp://${ftpHost}${ftpDirectory}")
        ftpEndpointBuilder.filter = new org.mule.transport.file.filters.FilenameWildcardFilter(ftpFileName)
        eventContext.requestEvent(ftpEndpointBuilder.buildInboundEndpoint(),
                                  eventContext.timeout)
      </script:text>
    </script:script>
  </script:component>
</service>