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Thread: Push Server

  1. #1
    Join Date
    Aug 2006
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    89
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    Ubuntu

    Push Server

    I'm probably Overthinking my problem but I'm trying to learn anyways.

    Intro: I'm running 2 servers (Development & Live)
    Live Server is Running Ubuntu Linux 11
    Development Server is Running Ubuntu Linux 12
    Both are running on converted Windows Boxes, but are servicing less than 100 clients.

    The server running MySQL for the Database, Apache for Web Services (Primarily used via SOAP & WSDL to custom C# .NET Applications)

    Right now any changes in the database have to be polled for, with our user count it's not a real issue (each active user might send a SOAP Request every 500ms for a Check of Timestamps of the tables)

    Now what I want to do is Configure this as a PUSH Server. So when there are any changes, the Ubuntu server will PUSH out a notification to all active users that the Data has been updated. I'm hoping to have this work both on the local network and to any offsite clients.

    We're also looking at adding an Android Application to subscribe to the PUSH Server for notifications of data changes.

    Question:
    1) Can Apache be configured as a PUSH Server (If so, how?)
    2) If not, do I need something like Meteor (and can I install that in parallel with Apache?)

  2. #2
    Join Date
    Nov 2008
    Location
    Metro Boston
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    8,617
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Push Server

    Sounds more like a task that the application should be handling itself when it processes an INSERT.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

  3. #3
    Join Date
    Aug 2006
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    89
    Distro
    Ubuntu

    Re: Push Server

    Quote Originally Posted by SeijiSensei View Post
    Sounds more like a task that the application should be handling itself when it processes an INSERT.
    But how would the client application.
    1) know who also is connected ?
    2) send an update request to all other connected clients ?

  4. #4
    Join Date
    Nov 2006
    Location
    Belgium
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    3,007
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Push Server

    It's always going to depend on your clients - a server can only "push" something to a client that is listening for or otherwise awaiting input.

    So how you implement this server-side depends on what you have client-side.

    I'm guessing more often than not this sort of functionality would be an implementation of Remote Procedure Call, but according to wikipedia it can also be achieved by a http server, i.e. by streaming or with "long polling"
    http://en.wikipedia.org/wiki/Push_te...TP_server_push


    so, yes, you can do this with Apache.
    How ? -> depends on the clients. At that point, your question becoms more of a coding question than a server question, imo.

  5. #5
    Join Date
    Aug 2006
    Beans
    89
    Distro
    Ubuntu

    Re: Push Server

    After some testing & coding.
    1) Meteor will run fine with Apache, I just modified the port it's listing to for subscriptions / commands.
    2) Open only the subscription port in the firewall and direct it to the Ubuntu Box.
    3) on the SOAP Server.php script, add new function to send notices as required.
    4) Coded the .NET Dll to subscribe to the server for updates.

    so far it's working.
    If I run any "change in database" command I get the push notification, and the apps that are subscribed to it get it.

    Now to create an android app so subscribe to the "BugReport" Channel

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