org.streamsource.streamflow.statistic.web.Dao.java Source code

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Here is the source code for org.streamsource.streamflow.statistic.web.Dao.java

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/**
 *
 * Copyright 2009-2014 Jayway Products AB
 *
 * 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.
 */
package org.streamsource.streamflow.statistic.web;

import org.apache.commons.dbcp.BasicDataSource;

import javax.sql.DataSource;
import java.util.prefs.Preferences;

/**
 * Data access object
 */
public class Dao {
    private static String dbVendor;
    private static BasicDataSource ds;
    private static boolean bDataSourceInitialized = false;

    private static void initializeDataSource() {
        Preferences preference = Preferences.userRoot()
                .node("/streamsource/streamflow/StreamflowServer/streamflowds/properties");
        String dbUrl = preference.get("url", "n/a");
        String dbUser = preference.get("username", "n/a");
        String dbPwd = preference.get("password", "n/a");
        String dbDriver = preference.get("driver", "n/a");

        dbVendor = preference.get("dbVendor", "mysql");

        ds = new BasicDataSource();
        ds.setDriverClassName(dbDriver);
        ds.setUrl(dbUrl);
        ds.setUsername(dbUser);
        ds.setPassword(dbPwd);

        bDataSourceInitialized = true;
    }

    public static void closeDataSource() throws Exception {
        ds.close();
    }

    public static DataSource getDataSource() {
        if (bDataSourceInitialized == false) {
            initializeDataSource();
        }

        return (ds);
    }

    public static String getDbVendor() {
        if (bDataSourceInitialized == false) {
            initializeDataSource();
        }

        return dbVendor;
    }
}