Env builder to change from local to OpenStack db. when in production.

EnvBuilder.java

/*
 * Author: Sofus Albertsen
 * 
 */

import static org.eclipse.persistence.config.PersistenceUnitProperties.*;
import java.util.HashMap;
import java.util.Map;

public class EnvBuilder {

    public static Map<String, String> getOpenShiftEnvVars() {
        Map<String, String> out = new HashMap<String, String>();
        Map<String, String> env = System.getenv();
        //If openshift is not present at the runtime, then return an empty map
        if (!env.keySet().contains("OPENSHIFT_MYSQL_DB_USERNAME")) {
            return out;
        }
        //Else, build up the URL's for the database
        String url = "JDBC:MYSQL://";
        url=url+System.getenv("OPENSHIFT_MYSQL_DB_HOST")+":";
        url=url+System.getenv("OPENSHIFT_MYSQL_DB_PORT")+"/";
        url=url+System.getenv("OPENSHIFT_GEAR_NAME");
        out.put(JDBC_URL, url);
        out.put(JDBC_USER, System.getenv("OPENSHIFT_MYSQL_DB_USERNAME"));
        out.put(JDBC_PASSWORD, System.getenv("OPENSHIFT_MYSQL_DB_PASSWORD"));
        return out;
    }

}