Examples of org.odmg.Database.open()

org.odmg.Database.open()
Open the named database with the specified access mode. Attempts to open a database when it has already been opened will result in the throwing of the exception DatabaseOpenException. A DatabaseNotFoundException is thrown if the database does not exist. Some implementations may throw additional exceptions that are also derived from ODMGException. @param name The name of the database. @param accessMode The access mode, which should be one of the static fields:OPEN_READ_ONLY, OPEN_READ_WRITE, or OPEN_EXCLUSIVE. @exception ODMGException The database could not be opened.

    {
        // get facade instance
        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        //open database
        db.open(databaseName, Database.OPEN_READ_WRITE);
        Transaction tx = odmg.newTransaction();


        //perform transaction
        try
        {

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        //try open database with non existing repository file:
        String wrongDatabaseName = "ThereIsNoSuchFile";
        try
        {
            db.open(wrongDatabaseName, Database.OPEN_READ_WRITE);
            fail("should not be able to open database " + wrongDatabaseName);
        }
        catch (ODMGException ex)
        {
            return;

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        String tablename = null;


        //open database
        try
        {
            db.open(databaseName, Database.OPEN_READ_WRITE);
        }
        catch (ODMGException ex)
        {
            fail("ODMGException: " + ex.getMessage());
        }

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        MainObject obj_2 = new MainObject(null, name);
        MainObject obj_3 = new MainObject(null, name);


        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        db.open(TestHelper.DEF_DATABASE_NAME, Database.OPEN_READ_WRITE);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(obj_1, Transaction.WRITE);
        tx.lock(obj_2, Transaction.WRITE);

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        SingleReference s_ref_4 = new SingleReference(nameSingleRef);
        obj_2.setSingleReference(s_ref_4);


        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        db.open(TestHelper.DEF_DATABASE_NAME, Database.OPEN_READ_WRITE);


        TransactionExt tx = (TransactionExt) odmg.newTransaction();
        tx.begin();
        db.makePersistent(s_ref_4);
        db.makePersistent(obj_2);

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        obj_1.setSingleReference(s_ref_3);
        obj_2.setSingleReference(s_ref_4);


        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        db.open(TestHelper.DEF_DATABASE_NAME, Database.OPEN_READ_WRITE);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        db.makePersistent(s_ref_1);
        db.makePersistent(s_ref_2);

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        Database       db   = odmg.newDatabase();


        // open database
        try
        {
            db.open(DATABASE_NAME, Database.OPEN_READ_WRITE);
        }
        catch (ODMGException ex)
        {
            ex.printStackTrace();
        }

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        MainObject obj_2 = new MainObject(null, name);
        MainObject obj_3 = new MainObject(null, name);


        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        db.open(TestHelper.DEF_DATABASE_NAME, Database.OPEN_READ_WRITE);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(obj_1, Transaction.WRITE);
        tx.lock(obj_2, Transaction.WRITE);

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        obj_2.setSingleReference(s_ref_4);
        s_ref_3.setMainObject(obj_1);


        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        db.open(TestHelper.DEF_DATABASE_NAME, Database.OPEN_READ_WRITE);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        db.makePersistent(s_ref_1);
        db.makePersistent(s_ref_2);

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    public static void main(String[] args) throws Exception
    {
        Implementation odmg = OJB.getInstance();
        Database       db   = odmg.newDatabase();


        db.open("default", Database.OPEN_READ_WRITE);


        Product product = new Product();


        product.setName("Widget");
        product.setPrice(9.99);

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