Examples of org.xtreemfs.babudb.api.DatabaseManager.executeTransaction()

Class org.xtreemfs.babudb.api.DatabaseManager

Examples of org.xtreemfs.babudb.api.DatabaseManager.executeTransaction()

org.xtreemfs.babudb.api.DatabaseManager.executeTransaction()
Executes a lightweight database transaction. @param txn the transaction to execute @throws BabuDBException if an error occurred while executing the transaction

        // create and execute a transaction
        Transaction txn = dbMan.createTransaction();
        txn.createDatabase("test", 3);
        txn.insertRecord("test", 0, "hello".getBytes(), "world".getBytes());
        txn.insertRecord("test", 1, "key".getBytes(), "value".getBytes());
        dbMan.executeTransaction(txn);
        
        // check if the database is there
        Database db = dbMan.getDatabase("test");
        assertNotNull(db);
        assertEquals("test", db.getName());

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        // 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);
        assertEquals("test", db.getName());

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        // create and execute a third transaction
        txn = dbMan.createTransaction();
        txn.deleteDatabase("test");
        txn.deleteDatabase("test2");
        dbMan.executeTransaction(txn);
        
        // check if all databases were deleted
        assertEquals(0, dbMan.getDatabases().size());
        
        // create and execute an empty transaction

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        // check if all databases were deleted
        assertEquals(0, dbMan.getDatabases().size());
        
        // create and execute an empty transaction
        txn = dbMan.createTransaction();
        dbMan.executeTransaction(txn);
        
    }
    
    @Test
    public void testTransactionPersistence() throws Exception {

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        // create and execute a transaction
        Transaction txn = dbMan.createTransaction();
        txn.createDatabase("test", 2);
        txn.insertRecord("test", 0, "hello".getBytes(), "world".getBytes());
        txn.insertRecord("test", 1, "key".getBytes(), "value".getBytes());
        dbMan.executeTransaction(txn);
        
        // shutdown and restart the database
        database.shutdown();
        database = BabuDBFactory.createBabuDB(new BabuDBConfig(baseDir, baseDir, 1, 0, 0, SyncMode.ASYNC, 0,
            0, COMPRESSION, maxNumRecs, maxBlockFileSize, !MMAP, -1, LOG_LEVEL));

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        // create and execute a transaction
        Transaction txn = dbMan.createTransaction();
        txn.createDatabase("test", 1);
        txn.insertRecord("test", 0, "hello".getBytes(), "world".getBytes());
        txn.insertRecord("test", 0, "key".getBytes(), "value".getBytes());
        dbMan.executeTransaction(txn);
        
        assertEquals(1, count.get());
        
        // create and execute another transaction (which is empty)
        txn = dbMan.createTransaction();

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            public void transactionPerformed(Transaction txn) {
                count.incrementAndGet();
            }
        };
        dbMan.addTransactionListener(l1);
        dbMan.executeTransaction(txn);
        
        assertEquals(3, count.get());
        
    }

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            txn.createDatabase(dbName, numIndices);
            for (int j = 0; j < numKVPairs; j++) {
                String kv = intToString(j, ("" + numKVPairs).length());
                txn.insertRecord(dbName, j % numIndices, kv.getBytes(), kv.getBytes());
            }
            dbMan.executeTransaction(txn);
        }
        
        if (errors.size() > 0)
            throw errors.get(0);

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