WebLogic多个连接

时间:2015-07-15 14:41:08

标签: java web connection database-connection weblogic12c

我的 WebLogic Server 上有两个DataSource,每个都访问不同的数据库。
在我的客户端应用程序中,我有一些方法需要连接到第一个 DB和其他需要连接到 second 的人。
但是当我运行它时,它只是连接我执行的第一个方法。
例如,如果我执行一个获取第一个DB连接的方法,只有访问该数据库的方法可以工作,我就无法执行任何需要其他连接的方法。
有人可以帮帮我吗?我正在使用WebLogic 12c

这是我的类,它获取数据源:

package com.henrique.dao;

import java.sql.Connection;

import javax.naming.*;
import javax.sql.*;

public class KironMySql {

    private static DataSource KironMySql = null;
    private static Context context = null;

    public static DataSource KironMySqlConn() throws Exception{
        if (KironMySql != null) {
            return KironMySql;
        }
        try{
            if(KironMySql == null){
                context = new InitialContext();
                KironMySql = (DataSource) context.lookup("KironLocal");
            }           
        }catch(Exception e){
            e.getMessage();
        }
        return KironMySql;
    }

    public static DataSource KironMySqlConnIp() throws Exception{
        if (KironMySql != null) {
            return KironMySql;
        }
        try{
            if(KironMySql == null){
                context = new InitialContext();
                KironMySql = (DataSource) context.lookup("KironTabelaApp");
            }           
        }catch(Exception e){
            e.getMessage();
        }
        return KironMySql;
    }

    public static Connection KironConnection(){
        Connection conn = null;
        try{
            conn = KironMySqlConn().getConnection();
            return conn;
        }catch(Exception e){
            e.getMessage();
        }
        return conn;
    }

    public static Connection KironConnectionIp(){
        Connection conn = null;
        try{
            conn = KironMySqlConnIp().getConnection();
            return conn;
        }catch(Exception e){
            e.getMessage();
        }
        return conn;
    }

}

以下是使用不同连接的方法的两个示例:

public JSONArray Login(String usu_login, String usu_senha) throws Exception{
        PreparedStatement query = null;
        Connection conn = null;
        ToJson converter = new ToJson();
        JSONArray json = new JSONArray();

        try{
            conn = KironMySql.KironConnection();
            query = conn.prepareStatement("select usu_nome from usuario where usu_login = ? and usu_senha = ?");
            query.setString(1, usu_login);
            query.setString(2, usu_senha);
            ResultSet rs = query.executeQuery();
            json = converter.toJSONArray(rs);
            query.close();          
        }catch(Exception e){
            e.printStackTrace();
            return json;
        }finally{
            if(conn != null) conn.close();
        }
        return json;
    }

    public JSONArray getIp(String emp_codigo) throws Exception{
        PreparedStatement query = null;
        Connection conn = null;
        ToJson converter = new ToJson();
        JSONArray json = new JSONArray();

        try{
            conn = KironMySql.KironConnectionIp();
            query = conn.prepareStatement("select con_ip from conexaoapp where emp_codigo = ?");
            query.setString(1, emp_codigo);
            ResultSet rs = query.executeQuery();
            json = converter.toJSONArray(rs);
            query.close();          
        }catch(Exception e){
            e.printStackTrace();
            return json;
        }finally{
            if(conn != null) conn.close();
        }
        return json;
    }   

1 个答案:

答案 0 :(得分:1)

在这两种情况下,您都使用private static DataSource KironMySql = null;实例。为不同的DS提供单独的DataSource对象。

在尝试获取KironLocal DS连接时,您基本上屏蔽了KironTabelaApp DS。

因此,您更新的代码如下所示:

package com.henrique.dao;

import java.sql.Connection;

import javax.naming.*;
import javax.sql.*;

public class KironMySql {

    private static DataSource KironMySql = null;
    private static DataSource KironMySqlIp = null;  //This is new line for code fix, and using "KironMySqlIp" instance later in the code where connection with "KironTabelaApp" data source is needed.
    private static Context context = null;

    public static DataSource KironMySqlConn() throws Exception{
        if (KironMySql != null) {
            return KironMySql;
        }
        try{
            if(KironMySql == null){
                context = new InitialContext();
                KironMySql = (DataSource) context.lookup("KironLocal");
            }           
        }catch(Exception e){
            e.getMessage();
        }
        return KironMySql;
    }

    public static DataSource KironMySqlConnIp() throws Exception{
        if (KironMySqlIp != null) {
            return KironMySqlIp;
        }
        try{
            if(KironMySqlIp == null){
                context = new InitialContext();
                KironMySqlIp = (DataSource) context.lookup("KironTabelaApp");
            }           
        }catch(Exception e){
            e.getMessage();
        }
        return KironMySqlIp;
    }

    public static Connection KironConnection(){
        Connection conn = null;
        try{
            conn = KironMySqlConn().getConnection();
            return conn;
        }catch(Exception e){
            e.getMessage();
        }
        return conn;
    }

    public static Connection KironConnectionIp(){
        Connection conn = null;
        try{
            conn = KironMySqlConnIp().getConnection();
            return conn;
        }catch(Exception e){
            e.getMessage();
        }
        return conn;
    }

}