JPA.java

package net.csdn.jpa;

import net.csdn.ServiceFramwork;
import net.csdn.common.settings.Settings;
import net.csdn.env.Environment;
import net.csdn.jpa.context.JPAConfig;
import net.csdn.jpa.model.Model;

import java.util.HashMap;
import java.util.Map;

/**
 * BlogInfo: WilliamZhu
 * Date: 12-6-26
 * Time: 下午9:46
 * 因为无法通过IOC管理jpa生成的对象(当然可以通过AOP解决,避免复杂，我们这里采用静态工厂,这个会在系统启动的时候设置值)
 * 目前不支持多数据库
 */
public class JPA {
    private static JPAConfig jpaConfig;


    private static Settings settings;
    private static Environment environment;

    public final static Map<String, Class<Model>> models = new HashMap<String, Class<Model>>();

    public static JPAConfig getJPAConfig() {
        if (jpaConfig == null) {
            jpaConfig = new JPAConfig(properties(), settings.get("datasources.mysql.database"));
        }
        return jpaConfig;
    }

    public static void setJPAConfig(JPAConfig _jpaConfig) {
        jpaConfig = _jpaConfig;
    }

    public static Settings getSettings() {
        return settings;
    }

    public static void setSettings(Settings settings) {
        JPA.settings = settings;
    }

    public Environment getEnvironment() {
        return environment;
    }

    public void setEnvironment(Environment environment) {
        this.environment = environment;
    }

    private static Map<String, String> properties() {
        Map<String, String> properties = new HashMap<String, String>();

        Map<String, Settings> groups = settings.getGroups(ServiceFramwork.mode.name() + ".datasources");
        Settings mysqlSetting = groups.get("mysql");

        properties.put("hibernate.show_sql", settings.get("orm.show_sql", "true"));
        properties.put("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");
        properties.put("hibernate.connection.password", mysqlSetting.get("password"));
        properties.put("hibernate.connection.url", "jdbc:mysql://" + mysqlSetting.get("host") + "/" + mysqlSetting.get("database"));
        properties.put("hibernate.connection.username", mysqlSetting.get("username"));
        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
        properties.put("hibernate.c3p0.min_size", settings.get("orm.pool_min_size", "20"));
        properties.put("hibernate.c3p0.max_size", settings.get("orm.pool_max_size", "20"));
        properties.put("hibernate.c3p0.timeout", settings.get("orm.timeout", "300"));
        properties.put("hibernate.c3p0.max_statements", settings.get("orm.max_statements", "50"));
        properties.put("hibernate.c3p0.idle_test_period", settings.get("orm.idle_test_period", "3000"));
        //    properties.put("hibernate.query.factory_class", "org.hibernate.hql.internal.classic.ClassicQueryTranslatorFactory");
        return properties;
    }
}