Examples of org.xtreemfs.babudb.api.transaction.Transaction.deleteRecord()

Package org.xtreemfs.babudb.api.transaction

Class org.xtreemfs.babudb.api.transaction.Transaction

Examples of org.xtreemfs.babudb.api.transaction.Transaction.deleteRecord()

org.xtreemfs.babudb.api.transaction.Transaction.deleteRecord()
Deletes a key-value pair. @param databaseName the name of the database @param indexId in which the key-value pair is located @param key the key of the record to delete @return a reference to the transaction

        assertEquals("value", new String(value));
        
        // create and execute a second transaction
        txn = dbMan.createTransaction();
        txn.createDatabase("test2", 1);
        txn.deleteRecord("test", 0, "hello".getBytes());
        dbMan.executeTransaction(txn);
        
        // check if the both databases are there
        db = dbMan.getDatabase("test");
        assertNotNull(db);

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        }
        
        // make a transaction to delete the last 3 keys of two of the databases
        // an update anomaly will be visible, if something went wrong
        Transaction txn = database.getDatabaseManager().createTransaction();
        txn.deleteRecord(db0.getName(), 0, "99".getBytes());
        txn.deleteRecord(db0.getName(), 0, "98".getBytes());
        txn.deleteRecord(db0.getName(), 0, "97".getBytes());
        txn.deleteRecord(db2.getName(), 2, "99".getBytes());
        txn.deleteRecord(db2.getName(), 2, "98".getBytes());
        txn.deleteRecord(db2.getName(), 2, "97".getBytes());

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        // make a transaction to delete the last 3 keys of two of the databases
        // an update anomaly will be visible, if something went wrong
        Transaction txn = database.getDatabaseManager().createTransaction();
        txn.deleteRecord(db0.getName(), 0, "99".getBytes());
        txn.deleteRecord(db0.getName(), 0, "98".getBytes());
        txn.deleteRecord(db0.getName(), 0, "97".getBytes());
        txn.deleteRecord(db2.getName(), 2, "99".getBytes());
        txn.deleteRecord(db2.getName(), 2, "98".getBytes());
        txn.deleteRecord(db2.getName(), 2, "97".getBytes());
        database.getDatabaseManager().executeTransaction(txn);

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        // make a transaction to delete the last 3 keys of two of the databases
        // an update anomaly will be visible, if something went wrong
        Transaction txn = database.getDatabaseManager().createTransaction();
        txn.deleteRecord(db0.getName(), 0, "99".getBytes());
        txn.deleteRecord(db0.getName(), 0, "98".getBytes());
        txn.deleteRecord(db0.getName(), 0, "97".getBytes());
        txn.deleteRecord(db2.getName(), 2, "99".getBytes());
        txn.deleteRecord(db2.getName(), 2, "98".getBytes());
        txn.deleteRecord(db2.getName(), 2, "97".getBytes());
        database.getDatabaseManager().executeTransaction(txn);
        assertNull(db0.lookup(0, "99".getBytes(), null).get());

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        // an update anomaly will be visible, if something went wrong
        Transaction txn = database.getDatabaseManager().createTransaction();
        txn.deleteRecord(db0.getName(), 0, "99".getBytes());
        txn.deleteRecord(db0.getName(), 0, "98".getBytes());
        txn.deleteRecord(db0.getName(), 0, "97".getBytes());
        txn.deleteRecord(db2.getName(), 2, "99".getBytes());
        txn.deleteRecord(db2.getName(), 2, "98".getBytes());
        txn.deleteRecord(db2.getName(), 2, "97".getBytes());
        database.getDatabaseManager().executeTransaction(txn);
        assertNull(db0.lookup(0, "99".getBytes(), null).get());
        assertNull(db0.lookup(0, "98".getBytes(), null).get());

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        Transaction txn = database.getDatabaseManager().createTransaction();
        txn.deleteRecord(db0.getName(), 0, "99".getBytes());
        txn.deleteRecord(db0.getName(), 0, "98".getBytes());
        txn.deleteRecord(db0.getName(), 0, "97".getBytes());
        txn.deleteRecord(db2.getName(), 2, "99".getBytes());
        txn.deleteRecord(db2.getName(), 2, "98".getBytes());
        txn.deleteRecord(db2.getName(), 2, "97".getBytes());
        database.getDatabaseManager().executeTransaction(txn);
        assertNull(db0.lookup(0, "99".getBytes(), null).get());
        assertNull(db0.lookup(0, "98".getBytes(), null).get());
        assertNull(db0.lookup(0, "97".getBytes(), null).get());

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        txn.deleteRecord(db0.getName(), 0, "99".getBytes());
        txn.deleteRecord(db0.getName(), 0, "98".getBytes());
        txn.deleteRecord(db0.getName(), 0, "97".getBytes());
        txn.deleteRecord(db2.getName(), 2, "99".getBytes());
        txn.deleteRecord(db2.getName(), 2, "98".getBytes());
        txn.deleteRecord(db2.getName(), 2, "97".getBytes());
        database.getDatabaseManager().executeTransaction(txn);
        assertNull(db0.lookup(0, "99".getBytes(), null).get());
        assertNull(db0.lookup(0, "98".getBytes(), null).get());
        assertNull(db0.lookup(0, "97".getBytes(), null).get());
        assertNull(db2.lookup(2, "99".getBytes(), null).get());

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