package structural;

// One of the Practical cases, for database query distribution

interface ORM {

public Object select(String[] args);

public Object update(String[] args);

public Object delete(Integer id);

}

class RealMySQLEngine implements ORM{

@Override

public Object select(String[] args) {

return null;

}

@Override

public Object update(String[] args) {

return null;

}

@Override

public Object delete(Integer id) {

return null;

}

}

class ProxyMySQLEngine implements ORM {

private final String masterJDBCConfig = "172.16.11.12";

private final String slaveJDBCConfig = "172.16.11.14";

@Override

public Object select(String[] args) {

Object connection = connect("select");

// connection.query(); TODO: Do the query here

return null;

}

@Override

public Object update(String[] args) {

Object connection = connect("update");

// connection.query(); TODO: Do the query here

return null;

}

@Override

public Object delete(Integer id) {

Object connection = connect("delete");

// connection.query(); TODO: Do the query here

return null;

}

private Object connect(String type){

String JDBCConfig = DBSelection(type);

// TODO: Return the Connected object

return null;

}

private String DBSelection(String type){

String config;

switch (type){

case "select" -> config = slaveJDBCConfig;

case "update" -> config = masterJDBCConfig;

case "delete" -> config = masterJDBCConfig;

default -> config = masterJDBCConfig;

}

System.out.println(config);

return config;

}

}

public class Proxy {

public static void main(String[] args) {

ORM proxy = new ProxyMySQLEngine();

proxy.update(new String[]{"active", "1"});

}

}