NOT 1.1 MAILINGLIST Avatar
  1. OMG Issue

NOT11 — Suspension of connections

  • Key: NOT11-27
  • Legacy Issue Number: 2120
  • Status: closed  
  • Source: Anonymous
  • Summary:

    Summary: This issue relates to the ability provided in Notification Service
    ProxyPushSuppliers for a consumer to suspend a connection to the channel
    (stop the channel pushing events to it) which is unavailable to the
    other passive clients of the service - pull suppliers.

    The problem arises because, without the ability for a pull supplier to
    suspend a connection, its only choices are

    (a) to block the return of a pull() call until it is able to
    supply an event - resulting in some ORB-dependent timeout on
    the call, or a blocked thread in the channel.

    (b) to reply to many unnecessary try_pull() calls with a FALSE
    result - expecting that the channel will use some sort of
    backoff algorithm.

    (c) to disconnect from the proxy and obtain a new one when it is
    ready to supply events again - causing significant overhead
    for both itself and the channel.
    I suspect that we only provided one set of suspend/resume operations
    because the only circumatance we considered in the design was data
    overrun at consumer clients. We ignored the traditional symmetry, and
    neglected "under-run" and its less disasterous, but still significant
    problems.

  • Reported: NOT 1.0.1 — Tue, 27 Oct 1998 05:00 GMT
  • Disposition: Resolved — NOT 1.1
  • Disposition Summary:

    No Data Available

  • Updated: Fri, 6 Mar 2015 21:36 GMT