[英]Multiple RMI Connections from single JVM using Weblogic RMI over T3
[英]WebLogic multiple Connections
我的WebLogic Server上有兩個數據源,每個數據源都訪問不同的數據庫。
在我的客戶端應用程序,我有一些需要連接到第二個方法是需要連接到第一 DB,等等。
但是,當我運行它時,它只會得到我執行的第一個方法的連接。
例如,如果我執行一個獲取冷杉數據庫連接的方法 ,則只有訪問該數據庫的方法才可以使用 ,而我無法執行任何需要其他連接的方法。
有人可以幫我嗎? 我正在使用WebLogic 12c
這是我的獲得數據源的班級:
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;
}
}
這是使用不同連接的方法的兩個示例:
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;
}
在這兩種情況下,您都使用private static DataSource KironMySql = null;
實例。 具有用於不同DS的單獨的DataSource
對象。
實質上,當您嘗試獲取KironTabelaApp
DS連接時,您是在屏蔽KironLocal
DS。
因此,更新后的代碼如下所示:
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;
}
}
這是我的數據源和“監視”選項卡
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