subsys/jaxrs/src/main/java/org/commonjava/indy/bind/jaxrs/ResourceManagementFilter.java
private void putRequestIDs( HttpServletRequest hsr, ThreadContext threadContext, MDCManager mdcManager )
    {
        /* We would always generate internalID and provide that in the MDC.
         * If the calling service supplies an externalID, we'd map that under its own key.
         * PreferredID should try to use externalID if it's available, and default over to using internalID if it's not.
         * What this gives us is a single key we can use to reference an ID for the request,
         * and whenever possible it'll reflect the externally supplied ID.
         */
        String internalID = UUID.randomUUID().toString();
        String externalID = hsr.getHeader( EXTERNAL_ID );
        String preferredID = externalID != null ? externalID : internalID;

        mdcManager.putRequestIDs( internalID, externalID, preferredID );

        /*
         * We should also put the same values in the ThreadContext map, so we can reference them from code without
         * having to go through the logging framework
         */
        threadContext.put( INTERNAL_ID, internalID );
        if ( externalID != null )
        {
            threadContext.put( EXTERNAL_ID, externalID );
        }
        threadContext.put( PREFERRED_ID, preferredID );
    }
private void putRequestIDs( HttpServletRequest hsr, ThreadContext threadContext, MDCManager mdcManager )
    {
        /* We would always generate internalID and provide that in the MDC.
         * If the calling service supplies an externalID, we'd map that under its own key.
         * PreferredID should try to use externalID if it's available, and default over to using internalID if it's not.
         * What this gives us is a single key we can use to reference an ID for the request,
         * and whenever possible it'll reflect the externally supplied ID.
         */
        String internalID = UUID.randomUUID().toString();
        String externalID = hsr.getHeader( EXTERNAL_ID );
        String preferredID = externalID != null ? externalID : internalID;

        mdcManager.putRequestIDs( internalID, externalID, preferredID );

        /*
         * We should also put the same values in the ThreadContext map, so we can reference them from code without
         * having to go through the logging framework
         */
        threadContext.put( INTERNAL_ID, internalID );
        if ( externalID != null )
        {
            threadContext.put( EXTERNAL_ID, externalID );
        }
        threadContext.put( PREFERRED_ID, preferredID );
    }
Put to MDC / threadContext request IDs.