step_by_step_replay.cpp

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#include "tutorial/Database.h"
#include "joedb/journal/File.h"
 
#include <iostream>
#include <iomanip>
 
namespace example
{
 ////////////////////////////////////////////////////////////////////////////
 class My_Database: public tutorial::Database
 ////////////////////////////////////////////////////////////////////////////
 {
  void comment(const std::string &comment) override
  {
   std::cout << "Comment: " << comment << '\n';
  };
 
  void timestamp(int64_t timestamp) override
  {
   std::cout << "Timestamp: " << timestamp << '\n';
  };
 };
}
 
/////////////////////////////////////////////////////////////////////////////
int main()
/////////////////////////////////////////////////////////////////////////////
{
 example::My_Database db;
 joedb::File file("tutorial.joedb", joedb::Open_Mode::read_existing);
 joedb::Readonly_Journal journal(file);
 
 int counter = 0;
 
 while (!journal.at_end_of_file())
 {
  journal.one_step(db);
  ++counter;
 
  std::cout << std::setw(3) << counter << ' ';
  std::cout << "Number of persons: ";
  std::cout << db.get_person_table().get_size();
  std::cout << '\n';;
 }
 
 return 0;
}