com.ibm.research.rdf.store.jena.impl.DB2TransactionHandler.java Source code

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Here is the source code for com.ibm.research.rdf.store.jena.impl.DB2TransactionHandler.java

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/******************************************************************************
 * Copyright (c) 2015 IBM Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *****************************************************************************/
package com.ibm.research.rdf.store.jena.impl;

import java.sql.Connection;
import java.sql.SQLException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.graph.impl.SimpleTransactionHandler;
import com.ibm.research.rdf.store.jena.RdfStoreException;

public class DB2TransactionHandler extends SimpleTransactionHandler {

    private Connection conn;
    private static final Log log = LogFactory.getLog(DB2TransactionHandler.class);

    public DB2TransactionHandler(Graph graph) {
        super();
        conn = ((DB2Graph) graph).getConnection();
    }

    public void abort() {
        try {
            conn.rollback();
        } catch (SQLException e) {
            log.error("Cannot abort transaction", e);
            throw new RdfStoreException(e.getLocalizedMessage(), e);
        }
    }

    public void begin() {
        try {
            conn.setAutoCommit(false);
        } catch (SQLException e) {
            log.error("Cannot begin transaction", e);
            throw new RdfStoreException(e.getLocalizedMessage(), e);
        }
    }

    public void commit() {
        try {
            conn.commit();
        } catch (SQLException e) {
            log.error("Cannot commit transaction", e);
            throw new RdfStoreException(e.getLocalizedMessage(), e);
        }
    }

    public boolean transactionsSupported() {
        return true;
    }
}