DatabaseConfiguration.java

/*
 * Copyright 2013 the original author or authors.
 *
 * 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.sbq.batch.configurations;

import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;
import java.sql.Connection;

/**
 * @author ilya40umov
 */
@Configuration
@EnableTransactionManagement
public class DatabaseConfiguration
{
    @Bean
    public PlatformTransactionManager transactionManager()
    {
        return new DataSourceTransactionManager(dataSource());
    }

    @Bean
    @Primary
    public DataSource dataSource()
    {
        return new LazyConnectionDataSourceProxy(dbcpDataSource());
    }

    @Bean(destroyMethod = "close")
    public DataSource dbcpDataSource()
    {
        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/batch_db");
        dataSource.setUsername("root");
        dataSource.setPassword("wakeup");
        dataSource.setMaxActive(20);
        dataSource.setMaxIdle(20);
        dataSource.setMaxWait(10000);
        dataSource.setInitialSize(5);
        dataSource.setValidationQuery("SELECT 1");
        dataSource.setDefaultTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
        return dataSource;
    }

    @Bean
    public JdbcTemplate jdbcTemplate()
    {
        return new JdbcTemplate(dataSource());
    }
}