在rmi中将c3p0配置和getConnection方法放在何处

Question

im making a rmi based client server application.

At Server side, it consists of an java file running rmi(for binding registries) and all the required interfaces implemeneted invoking other classes meant for various server based operation (which includes a connection with the database).

Now the doubt is

" Where Shall I place the code for configuring ComboPoolDataSource Instance and the getConnection() method so that the configuration can be done when i run the java rmi file and i can invoke .getConnection() from any other java file.

Answer 1

您可以将其放在执行绑定的启动类中，也可以放在单例类中。

Answer 2

At First...Create the code to initiate the connection in a class containing static methods or variables like this the following..

        private static ComboPooledDataSource cpds = new ComboPooledDataSource();
        public static void MakePool()
        {
               try 
               {
                 cpds=new ComboPooledDataSource();
                 cpds.setDriverClass("com.mysql.jdbc.Driver");
                 cpds.setJdbcUrl("jdbc:mysql://localhost:3306/att_db");
                 cpds.setUser("root");
                 cpds.setPassword("dragon");
                 cpds.setMaxPoolSize(MaxPoolSize);
                 cpds.setMinPoolSize(MinPoolSize);
                 cpds.setAcquireIncrement(Accomodation);
             } 
             catch (PropertyVetoException ex) 
             {
                 //handle exception...not important.....
              }

}
public static Connection getConnection()
{
           return cpds.getConnection();
}

Once ur done Create another class meant for server operations....

and get the Connections from the Pool...

         try{

               con=DatabasePool.getConnection();
               // DatabasePool is the name of the Class made earlier....
               .
               .
               .
               .  // Server operations as u wanted.....
               .
               .
             }
             catch(SQL EXCEPTION HERE)
             {
                  .....
             }
             finally
             {     
               if(con!=null)
               {
                      con.close();      
               }
             }