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/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.mso.bpmn.core.utils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.openecomp.mso.logger.MsoLogger;

/**
 * Sets up the unit test (H2) database for Camunda.
 */
public class CamundaDBSetup {
    private static boolean isDBConfigured = false;
    private static final MsoLogger LOGGER = MsoLogger.getMsoLogger(MsoLogger.Catalog.BPEL);

    private CamundaDBSetup() {
    }

    public static synchronized void configure() throws SQLException {
        if (isDBConfigured) {
            return;
        }

        LOGGER.debug("Configuring the Camunda H2 database for MSO");

        Connection connection = null;
        PreparedStatement stmt = null;

        try {
            connection = DriverManager.getConnection(
                    "jdbc:h2:mem:camunda;DB_CLOSE_DELAY=-1", "sa", "");

            stmt = connection.prepareStatement("delete from ACT_HI_VARINST");
            stmt.executeUpdate();
            stmt.close();
            stmt = null;

            stmt = connection.prepareStatement("ALTER TABLE ACT_HI_VARINST alter column TEXT_ clob");
            stmt.executeUpdate();
            stmt.close();
            stmt = null;

//			stmt = connection.prepareStatement("ALTER TABLE ACT_HI_VARINST alter column NAME_ clob");
//			stmt.executeUpdate();
//			stmt.close();
//			stmt = null;

            stmt = connection.prepareStatement("delete from ACT_HI_DETAIL");
            stmt.executeUpdate();
            stmt.close();
            stmt = null;

            stmt = connection.prepareStatement("ALTER TABLE ACT_HI_DETAIL alter column TEXT_ clob");
            stmt.executeUpdate();
            stmt.close();
            stmt = null;

//			stmt = connection.prepareStatement("ALTER TABLE ACT_HI_DETAIL alter column NAME_ clob");
//			stmt.executeUpdate();
//			stmt.close();
//			stmt = null;

            stmt = connection.prepareStatement("ALTER TABLE ACT_RU_VARIABLE alter column TEXT_ clob");
            stmt.executeUpdate();
            stmt.close();
            stmt = null;

            connection.close();
            connection = null;

            isDBConfigured = true;
        } catch (SQLException e) {
            LOGGER.debug("CamundaDBSetup caught " + e.getClass().getSimpleName());
            LOGGER.debug("SQLException :", e);
        } finally {
            if (stmt != null) {
                try {
                    stmt.close();
                } catch (Exception e) {
                    LOGGER.debug("Exception :", e);
                }
            }

            if (connection != null) {
                try {
                    connection.close();
                } catch (Exception e) {
                    LOGGER.debug("Exception :", e);
                }
            }
        }
    }
}