ConexaoDb.java

package br.ufpb.dcx.aps;

import java.io.BufferedInputStream;
import java.net.URL;
import java.util.Properties;

public class ConexaoBD {

    private static ConexaoBD[] instances = null;
    private static Integer qtdConexoes = 1;
    private static Integer indice = 0;

    private ConexaoBD() {}

    public static ConexaoBD getInstance() {
        if(instances == null) {
            //Carregar qtdConexoes
            qtdConexoes = carregarDados("configuracao.properties");
package br.ufpb.dcx.aps;

import java.io.BufferedInputStream;
import java.net.URL;
import java.util.Properties;

public class ConexaoBD {

    private static ConexaoBD[] instances = null;
    private static Integer qtdConexoes = 1;
    private static Integer indice = 0;

    private ConexaoBD() {}

    public static ConexaoBD getInstance() {
        if(instances == null) {
            //Carregar qtdConexoes
            qtdConexoes = carregarDados("configuracao.properties");

            instances = new ConexaoBD[qtdConexoes];
            for (int i = 0; i < instances.length; i++) {
                instances[i] = new ConexaoBD();
            }

        }
        indice = indice++ % qtdConexoes;
        return instances[indice];
    }

    public static int carregarDados(String arquivo) {
        Properties prop = new Properties();
    
        try {
            URL resource = ConexaoBD.class.getResource(arquivo);
    
            if(resource == null) {
                throw new RuntimeException("Nao pode achar recurso: " + arquivo);
            }
    
            prop.load(new BufferedInputStream(resource.openStream()));
    
        } catch(Exception ex ) {
            System.err.println(ex.getMessage());
        }
        String qtdConexoesStr = prop.getProperty("qtdConexoes", qtdConexoes.toString());
        return Integer.parseInt(qtdConexoesStr);
      }

}
            instances = new ConexaoBD[qtdConexoes];
            for (int i = 0; i < instances.length; i++) {
                instances[i] = new ConexaoBD();
            }

        }
        indice = indice++ % qtdConexoes;
        return instances[indice];
    }

    public static int carregarDados(String arquivo) {
        Properties prop = new Properties();
    
        try {
            URL resource = ConexaoBD.class.getResource(arquivo);
    
            if(resource == null) {
                throw new RuntimeException("Nao pode achar recurso: " + arquivo);
            }
    
            prop.load(new BufferedInputStream(resource.openStream()));
    
        } catch(Exception ex ) {
            System.err.println(ex.getMessage());
        }
        String qtdConexoesStr = prop.getProperty("qtdConexoes", qtdConexoes.toString());
        return Integer.parseInt(qtdConexoesStr);
      }

}