Github user ahgittin commented on a diff in the pull request:

    https://github.com/apache/incubator-brooklyn/pull/161#discussion_r17530289
  
    --- Diff: usage/rest-api/src/main/java/brooklyn/rest/api/ServerApi.java ---
    @@ -53,7 +53,8 @@
         @Consumes({MediaType.APPLICATION_FORM_URLENCODED})
         public void shutdown(
             @FormParam("stopAppsFirst") @DefaultValue("false") boolean 
stopAppsFirst,
    -        @FormParam("delayMillis") @DefaultValue("250") long delayMillis);
    +        @FormParam("delayMillis") @DefaultValue("250") long delayMillis,
    --- End diff --
    
    and add `@ApiParam` ?  i now appreciate that the API here previously took 
longs so you just followed that pattern, but i think we should move towards 
consistency.  to preserve backwards compatibility we could have
    
         @ApiParam(name = "delay", value = "Minimum delay before system.exit", 
required = false)
         @FormParam("delay") @DefaultValue("250ms") String delay, 
         @ApiParam(name = "delayMillis", value = "Deprecated delay before 
timeout", required = false)
         @FormParam("delayMillis") Long delayMillis
    
    and then in the code have an `if (delayMillis!=null) { /* log warn of 
deprecated, and use this value */ }`
    
    ?


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