Re: Deploying N application with N x 2 databases

From: Tomi NA (hefes..mail.com)
Date: Tue Jun 13 2006 - 08:42:51 EDT

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    On 6/13/06, Borut Bolčina <bob@najdi.si> wrote:
    > What is the best (most elegant) solution to deploy standalone
    > application on several servers each using two databases. I don't want to
    > manually correct DomainMap (and DomainNode.driver) on each server to
    > point to correct database.
    >
    > Databases A1..AN and B1..BN are identical, only data varies.
    >
    > server1:application:database_A1,database_B1
    > server2:application:database_A2,database_B2
    > ...
    > serverN:application:database_AN,database_BN
    >
    > Should I create N DataNodes in modeler? Any hints appreciated.

    There's an simpler way. This will e.g. generate 4 example Node definitions:

    $ for db in dbname1 dbname2 dbname3 dbname4; do cat
    cayenneNode.driver.xml | sed
    "s/\(.*\)\/initialDbName\(.*\)/\1\/$db\2/g" > ${db}Node.driver..xml;
    done

    You could do the same to generate N cayenne.xml files, placing each
    file (with it's respective node and mapping files in individual
    directories, named dbname1, dbname2 etc.
    The only assumption is that you have a UNIX shell within reach and are
    ready to use it. :)

    Cheers,
    t.n.a.

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