200.17.147.2 at 13:33, 3 June 2009

2009-06-03T13:33:09Z

200.17.147.2 at 13:32, 3 June 2009

2009-06-03T13:32:11Z

200.17.147.2: New page: `/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package console; import java.util.Scanner; import memoriatransacio...`


2009-06-03T13:31:22Z
New page: <code land="java">  ‎* To change this template, choose Tools | Templates  * and open the template in the editor.:   package console;  import java.util.Scanner; import memoriatransacio...
New page
<code land="java">



/*

 * To change this template, choose Tools | Templates

 * and open the template in the editor.

 */



package console;



import java.util.Scanner;

import memoriatransacional.MemoriaTransacional;



/**

 *

 * @author dmaron

 */

public class Main {



    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        // TODO code application logic here

        Scanner loScanner = new Scanner(System.in);

        String lsEntrada = loScanner.nextLine();

        MemoriaTransacional loMemoria = new MemoriaTransacional();

        String[] loSaida = loMemoria.ExecutarEscrita(lsEntrada.split(" "));

        for (int i = 0; i < loSaida.length; i++){

            String lsLetra = new String();

            lsLetra +=(char)((int)'A' + i);

            System.out.println(lsLetra + "=" + loSaida[i]);

        }

    }



}





/*

 * To change this template, choose Tools | Templates

 * and open the template in the editor.

 */



package memoriatransacional;



/**

 *

 * @author dmaron

 */

public class MemoriaTransacional {

    

    private int TAMANHO_MEMORIA = 26;

    

    private String[] ioMemoria = new String[TAMANHO_MEMORIA];

    private Transaction ioTransaction;

    

    public MemoriaTransacional() {

        this.Reset();

    }

    public String[] ExecutarEscrita(String[] aoEscritas){

        for (int i = 0; i<aoEscritas.length; i++){

            if (aoEscritas[i].contains("="))

                this.ExecutarEscrita(aoEscritas[i]);

            else {

                this.ExecutarTransaction(aoEscritas[i]);

            }

        }

        return ioMemoria;

    }

    

    public void ExecutarEscrita(String asEscrita){

        if (this.IsInTransaction())

            this.ioTransaction.AddEscrita((asEscrita));

        else

            this.Escrever(asEscrita);

    }

    

    private void Escrever(String asEscrita){

        String[] loValores = asEscrita.split("=");

        int liPosicao = (int)loValores[0].charAt(0) - (int)'A';

        this.ioMemoria[liPosicao] = loValores[1];

    }

    

    private void ExecutarTransaction(String asComando){

        if (asComando.equals("B"))

            this.BeginTransaction();

        else if (asComando.equals("C"))

            this.CommitTransaction();

        else if (asComando.equals("R"))

            this.RollBackTransaction();

    }

    

    private void BeginTransaction() {

        if (this.IsInTransaction()){

            this.ioTransaction.Begin();

        }

        else

            this.ioTransaction = new Transaction();

    }

    

    private void CommitTransaction(){

        if (this.ioTransaction.Commit()) {

            for (String loString : this.ioTransaction.GetEscritas())

                this.Escrever(loString);

            this.ioTransaction=null;

        }

    }

    

    private void RollBackTransaction(){

        if (this.ioTransaction.RollBack()) {

            this.ioTransaction=null;

        }

    }

    

    private Boolean IsInTransaction(){

        return (this.ioTransaction != null);

    }

    

    public void Reset(){

        for (int i =0; i < TAMANHO_MEMORIA; i++)

            this.ioMemoria[i] = "";

    }



}





/*

 * To change this template, choose Tools | Templates

 * and open the template in the editor.

 */



package memoriatransacional;



import java.util.ArrayList;



/**

 *

 * @author dmaron

 */

public class Transaction {

    private ArrayList<String> ioEscritas = new ArrayList<String>();

    private Transaction ioInner;

    private Boolean ibOpen = true;

    

    public void AddEscrita(String asEscrita){

        if (this.HasInner())

            this.ioInner.AddEscrita(asEscrita);

        else

            this.ioEscritas.add(asEscrita);

    }

    

    public ArrayList<String> GetEscritas(){

        return this.ioEscritas;

    }

    

    private Boolean HasInner(){

        return (this.ioInner != null);

    }

    

    public void Begin(){

        if (this.HasInner()) {

            this.ioInner.Begin();

        }

        else {

            this.ioInner = new Transaction();

        }

    }

    

    public Boolean Commit(){

        if (this.HasInner()){

            if (this.ioInner.Commit()){

                ArrayList<String> loEscritasInner = this.ioInner.GetEscritas();

                this.ioInner = null;

                for (String lsEscrita : loEscritasInner)

                    this.AddEscrita(lsEscrita);

            }

        }

        else {

            this.ibOpen = false;

        }

        return !this.ibOpen;

    }

    

    public Boolean RollBack() {

        if (!this.HasInner()) {

            this.ibOpen = false;

        }

        else {

            if (this.ioInner.RollBack())

                this.ioInner = null;

        }

        return !this.ibOpen;

    }

}





</code>

Solução: Problema da memória transacional (Diogo Maron) - Revision history

200.17.147.2 at 13:33, 3 June 2009

200.17.147.2 at 13:32, 3 June 2009

200.17.147.2: New page: /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package console; import java.util.Scanner; import memoriatransacio...

200.17.147.2: New page: `/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package console; import java.util.Scanner; import memoriatransacio...`