SAAS化，hibernate session 管理

最新推荐文章于 2024-12-03 10:49:25 发布

转载最新推荐文章于 2024-12-03 10:49:25 发布 · 120 阅读

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原文链接：https://my.oschina.net/lus/blog/117740

本文深入剖析了为何在软件开发领域，大多数程序员未能晋升为架构师的原因，通过详细解析架构师所需技能、职责与普通开发者之间的差异，帮助读者理解并提升自己成为优秀架构师的可能性。

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-----------------------------TenantMasterFactory.java---------------------------

package com.nen.cn.util;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

import org.hibernate.*;
import org.hibernate.cfg.Configuration;

@SuppressWarnings("static-access")
public class TenantMasterFactory{

private static Map<String, SessionFactory> sessionmapdfactory = new HashMap<String, SessionFactory>();
private static Map<String, Session> sessionmap = new HashMap<String, Session>();
private static Configuration cfg = null;
private static Properties pps = null;

TenantMasterFactory() {
}

/**
* new sessionFactorys for the Tenants
*/
static {
  pps = new Getproperties().getProperties("src/TenantManagerFile.properties");
  try {
   for (Iterator iter = pps.keySet().iterator(); iter.hasNext();) {
    String element = (String) iter.next();
    SessionFactory sessionFactory = Configuartion(pps.getProperty(String.valueOf(element)).trim());
    sessionmapdfactory.put(String.valueOf(element), sessionFactory);
   }
  }catch (Exception e) {
   System.err.println("%%%% Error Creating SessionFactory %%%%");
   e.printStackTrace();
  }
}

private static SessionFactory Configuartion(String catalog){
  cfg = new Configuration();
  cfg.configure("/"+ catalog +"hibernate.cfg.xml");
  return cfg.buildSessionFactory();
}

public Session getSession(String catalog) {
  Session session = sessionmap.get(catalog);
  if( session == null || !session.isOpen()){
   if(sessionmapdfactory.get(catalog) == null || sessionmapdfactory.get(catalog).isClosed()){
    SessionFactory sessionFactory = Configuartion(catalog);
    sessionmapdfactory.put(catalog, sessionFactory);
   }
   session = sessionmapdfactory.get(catalog).openSession();
   sessionmap.put(catalog, session);
  }
  System.out.println(sessionmapdfactory.get(catalog));
  return session;
}
}

------------------------------Getproperties .java------------------------

package com.nen.cn.util;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;

public class Getproperties {

private static Properties pps = null;

public static Properties getProperties(String fileName) {
  pps = new Properties();
  try {
   FileInputStream ss = new FileInputStream(fileName);
   if(ss != null){
    pps.load((InputStream) ss);
   }
   ss.close();
  } catch (Exception e) {
   System.out.println("The file loader error....");
  }
  return pps;
}

}

---------------------------TenantManagerFile.properties)---------------------------

1=WIS1
2=WIS2
3=WIS3
4=WIS4
5=WIS5
6=WIS6
7=WIS7
8=WIS8
9=WIS9
10=WIS10

--------------------------------------------------------------------------------------------------

Session session = dao.getSession(catalog);

catalog = TenantManagerFile.properties 前置项

TenantManagerFile.properties 后置项 = 数据库database名

转载于:https://my.oschina.net/lus/blog/117740