Comparing Objectivity and Versant for the “Stars” application

// Initialise Objy

ooInit();

transaction.start();

// open the federated database

fdHandle.open("starsDB",oocUpdate);

// create the first database in the federation

// (delete if it already exists)

if (dbHandle1.exist(fdHandle, "STARS_DB_1")) {

ooDelete(dbHandle1);

}

dbHandle1 = new(fdHandle) ooDBObj("STARS_DB_1");

// create the second database in the federation

// (delete if it already exists)

if (dbHandle2.exist(fdHandle, "STARS_DB_2")) {

ooDelete(dbHandle2);

}

dbHandle2 = new(fdHandle) ooDBObj("STARS_DB_2”);

.

.

.

transaction.commit();

// Initialise Versant

::dom = new PDOM;

// open the session database

::dom->("starsdb1",NULL);

// connect to the second database

::dom->("starsdb2");

.

.

.

::dom->();

::dom->();

::dom->(0);

• No API call to delete an existing DB?

• Separate databases, no federation

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