From the Programmers Guide on meta-data and filters ...

JBossESB ships with org.jboss.internal.soa.esb.message.filter.MetaDataFilter and org.jboss.internal.soa.message.filter.GatewayFilter which add the following meta-data to the Message as Properties with the indicated property names and the returned String values.

org.jboss.soa.esb.message.transport.type --> File, FTP, JMS or SQL.
org.jboss.soa.esb.message.source --> The name of the file from which the message was read.
org.jboss.soa.esb.message.time.dob --> The time the message entered the ESB, e.g., the time it was sent, or the time it arrived at a gateway.
org.jboss.soa.esb.mesage.time.dod --> The time the message left the ESB, e.g., the time it was received.
org.jboss.soa.esb.gateway.original.file.name --> If the message was received via a file related gateway node, then this element will contain the name of the original file from which the message was sourced.
org.jboss.soa.esb.gatway.original.queue.name --> If the message was received via a JMS gateway node, then this element will contain the name of the queue from which it was received.
org.jboss.soa.esb.gateway.original.url --> If the message was received via a SQL gateway node, then this element will contain the original database URL.