Dell DX6004S DX Content Router Setup and Configuration Guide - Page 40

C.3. Enumerator Next The Enumerator Next command is a request for the next objects in an enumeration which was previously initiated with an Enumerator Start command. For performance reasons Publisher does not attempt to retrieve elements in a specific order. The format of the request is as follows: GET /?maxItems= HTTP/1.1 Host: Note the maxItems query argument is only supported for the UUID and Event enumerator types. A maxItems argument supplied for a Metadata enumerator will be ignored. C.3.1. Enumerator Next Query Arguments The following optional query arguments are defined for the Next command only and used to convey status information about the Enumerator to the Publisher. The Publisher will use some but not all of this information to update Enumerator status on the Publisher console. See also the Configuration and Status Query Arguments section below for additional optional arguments that are shared with the Start method: Argument Name upTime backLog inProgress dropped syncToken Description Number of seconds since the subscriber was started. Number of items the subscriber is holding that it has not begun processing. Number of items the subscriber is actively processing. Number of items that the subscriber has failed to process. The dropped query argument provides the subscriber a way to report possible trouble conditions to the Publisher. Subscribers should take care to only "drop" events after sufficient retries. Note: Dropped events will not be resent by the Publisher without manual intervention using the Republish or Republish All commands from the Publisher Console. The value of the Content-Sync-Token header from the last successfully received Start or Next response. The Content-Sync-Token is used to confirm with the Publisher that a request was successfully received and ensure UUIDs are not missed due to a network or connectivity issue. If the syncToken matches the one expected by the Publisher from the previous request, the next set of requested UUIDs will be sent. If the syncToken does not match, the Publisher will resend the previous set of UUIDs. If the syncToken is not present on the request, the Publisher will automatically send the next set of requested UUIDs. Copyright © 2010 Caringo, Inc. All rights reserved 36 Version 2.2 December 2010