Examples of BabuDBTransaction

Examples of org.xtreemfs.babudb.lsmdb.BabuDBTransaction

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    @Test
    public void testTransactionSerialization() throws Exception {
       
        // create and initialize a transaction
        BabuDBTransaction txn = new BabuDBTransaction();
        txn.createDatabase("db1", 5);
        txn.createDatabase("db1", 1, new ByteRangeComparator[] { new DefaultByteRangeComparator() });
        txn.insertRecord("db1", 3, "hello".getBytes(), "world".getBytes());
        txn.deleteRecord("db2", 1, "blub".getBytes());
        txn.deleteDatabase("db1");
        txn.insertRecord("new-database", 3, "x".getBytes(), "".getBytes());
       
        // check transaction
        assertEquals(6, txn.getOperations().size());
       
        assertEquals(Operation.TYPE_CREATE_DB, txn.getOperations().get(0).getType());
        assertEquals("db1", txn.getOperations().get(0).getDatabaseName());
        assertEquals(2, txn.getOperations().get(0).getParams().length);
       
        assertEquals(Operation.TYPE_CREATE_DB, txn.getOperations().get(1).getType());
        assertEquals("db1", txn.getOperations().get(1).getDatabaseName());
        assertEquals(2, txn.getOperations().get(1).getParams().length);
       
        assertEquals(Operation.TYPE_GROUP_INSERT, txn.getOperations().get(2).getType());
        assertEquals("db1", txn.getOperations().get(2).getDatabaseName());
        assertEquals(2, txn.getOperations().get(2).getParams().length);
       
        assertEquals(Operation.TYPE_GROUP_INSERT, txn.getOperations().get(3).getType());
        assertEquals("db2", txn.getOperations().get(3).getDatabaseName());
        assertEquals(2, txn.getOperations().get(3).getParams().length);
       
        assertEquals(Operation.TYPE_DELETE_DB, txn.getOperations().get(4).getType());
        assertEquals("db1", txn.getOperations().get(4).getDatabaseName());
        assertNull(txn.getOperations().get(4).getParams());
       
        assertEquals(Operation.TYPE_GROUP_INSERT, txn.getOperations().get(5).getType());
        assertEquals("new-database", txn.getOperations().get(5).getDatabaseName());
        assertEquals(2, txn.getOperations().get(5).getParams().length);
       
        // test of the aggregate function
        byte aggregate = txn.aggregateOperationTypes();
        assertTrue(TransactionInternal.containsOperationType(aggregate, Operation.TYPE_CREATE_DB));
        assertTrue(TransactionInternal.containsOperationType(aggregate, Operation.TYPE_CREATE_DB));
        assertTrue(TransactionInternal.containsOperationType(aggregate, Operation.TYPE_GROUP_INSERT));
        assertTrue(TransactionInternal.containsOperationType(aggregate, Operation.TYPE_DELETE_DB));
        assertTrue(TransactionInternal.containsOperationType(aggregate, Operation.TYPE_DELETE_DB));
        assertFalse(TransactionInternal.containsOperationType(aggregate, Operation.TYPE_CREATE_SNAP));
       
        // serialize transaction to buffer
        int size = txn.getSize();
        ReusableBuffer buf = BufferPool.allocate(size);
        txn.serialize(buf);
        assertEquals(buf.position(), size);
       
        // deserialize transaction from buffer
        buf.position(0);
        TransactionInternal txn2 = TransactionInternal.deserialize(buf);
        assertEquals(buf.position(), size);
       
        // compare original transaction with deserialized transaction
        assertEquals(txn.getSize(), txn2.getSize());
        assertEquals(txn.getOperations().size(), txn2.getOperations().size());
        for (int i = 0; i < txn.getOperations().size(); i++) {
           
            Operation op1 = txn.getOperations().get(i);
            Operation op2 = txn2.getOperations().get(i);
           
            // count legal parameters
            int count = 0;
            if (op1.getParams() != null) {
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Examples of org.xtreemfs.babudb.lsmdb.BabuDBTransaction

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     * @return the deserialized transaction.
     * @throws IOException
     */
    public final static TransactionInternal deserialize(ReusableBuffer buffer) throws IOException {
       
        BabuDBTransaction txn = new BabuDBTransaction();
       
        // check whether the transaction used to be empty
        if (buffer.remaining() > 0 || buffer.limit() > 0) {
           
            assert(buffer.remaining() > 0);
           
            // deserialize the list of database names
            int length = buffer.getInt();
            String[] dbNames = new String[length];
            for (int i = 0; i < length; i++) {
                byte[] bytes = new byte[buffer.getInt()];
                buffer.get(bytes);
                dbNames[i] = new String(bytes);
            }
           
            // deserialize the list of operations
            length = buffer.getInt();
            for (int i = 0; i < length; i++) {
                txn.addOperation(OperationInternal.deserialize(dbNames, buffer));
            }
        }
        return txn;
    }
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