com.googlecode.wmbutil.cache.LookupDataSourceFactory.java Source code

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Here is the source code for com.googlecode.wmbutil.cache.LookupDataSourceFactory.java

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/*
 * Copyright 2007 (C) Callista Enterprise.
 * 
 * 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 com.googlecode.wmbutil.cache;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;

import org.apache.commons.dbcp.BasicDataSource;

public class LookupDataSourceFactory {

    private static LookupDataSource dataSource;

    public static synchronized LookupDataSource getDataSource() throws CacheRefreshException {
        if (dataSource == null) {
            try {
                Properties config = new Properties();
                config.load(new FileInputStream("lookup-connection.properties"));

                BasicDataSource ds = new BasicDataSource();
                ds.setDriverClassName(config.getProperty("lookup.class"));
                ds.setUrl(config.getProperty("lookup.url"));
                ds.setUsername(config.getProperty("lookup.username"));
                ds.setPassword(config.getProperty("lookup.password"));
                ds.setDefaultReadOnly(false);

                dataSource = new JdbcLookupDataSource(ds);
            } catch (FileNotFoundException e) {
                throw new CacheRefreshException("Could not find lookup-connection.properties file", e);
            } catch (IOException e) {
                throw new CacheRefreshException("Found, but could not read from lookup-connection.properties file",
                        e);
            } catch (RuntimeException e) {
                throw new CacheRefreshException("Could not create data source", e);
            }
        }

        return dataSource;
    }

    protected static void setDataSource(LookupDataSource newDataSource) {
        dataSource = newDataSource;
    }
}