ApplicationsMessagingStorySoFar < IVOA

IVOA Web>IvoaApplications>ApplicationsMessaging>ApplicationsMessagingStorySoFar (2007-03-14, JohnTaylor) (raw view)

---+ Summary of the Applications Messaging Discussion

---++ Areas where we agree:

   * We will concentrate on application to application messaging for a    single user on a single machine
   * We will have a hub/daemon process to control the messaging
   * The messaging system will be kept simple: no encryption, no transactions, guaranteed delivery etc
   * The messaging protocol will be decoupled from the semantics of the messages

---++ Areas where we probably agree

   * The messaging protocol will be defined independently of the details of any concrete implementation (this does not preclude such details also forming part of the specification)
   * Applications are free to spawn/include an instance of the hub/daemon, but should behave "nicely" (TBD) if they shut down or one is already running.
   * We won't attempt any clever hand-over from one hub/daemon instance to another.
   * Applications will be located dynamically (through the hub?), rather than from a remote or local registry
   * The mechanism used to bootstrap the connection to the hub/daemon will be simple


---++ Areas still to be discussed/agreed

   * A representative list of use cases (see follow up)
   * Precisely how we bootstrap the connection to the Hub/daemon
   * The messaging protocol
   * Which "wire" protocol(s) to use
   * Pretty much everything to do with the messages themselves
   * What we should aim to achieve by May





As of 14 Mar 2007



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Topic revision: r1 - 2007-03-14 - JohnTaylor

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