mongodb/client/examples/tutorial.cpp

#include <iostream>
#include "../../client/dbclient.h"

// g++ tutorial.cpp -lmongoclient -lboost_thread -lboost_filesystem -o tutorial

using namespace mongo;

void printIfAge(DBClientConnection& c, int age) {
  auto_ptr<DBClientCursor> cursor = c.query("tutorial.persons", QUERY( "age" << age ).sort("name") );
  while( cursor->more() ) {
    BSONObj p = cursor->next();
    cout << p.getStringField("name") << endl;
  }
}

void run() {
  DBClientConnection c;
  c.connect("localhost"); //"192.168.58.1");
  cout << "connected ok" << endl;
  BSONObj p = BSON( "name" << "Joe" << "age" << 33 );
  c.insert("tutorial.persons", p);
  p = BSON( "name" << "Jane" << "age" << 40 );
  c.insert("tutorial.persons", p);
  p = BSON( "name" << "Abe" << "age" << 33 );
  c.insert("tutorial.persons", p);
  p = BSON( "name" << "Samantha" << "age" << 21 << "city" << "Los Angeles" << "state" << "CA" );
  c.insert("tutorial.persons", p);

  c.ensureIndex("tutorial.persons", fromjson("{age:1}"));

  cout << "count:" << c.count("tutorial.persons") << endl;

  auto_ptr<DBClientCursor> cursor = c.query("tutorial.persons", emptyObj);
  while( cursor->more() ) { 
      cout << cursor->next().toString() << endl;
  }

  cout << "\nprintifage:\n";
  printIfAge(c, 33);
}

int main() { 
  try { 
    run();
  } 
  catch( DBException &e ) { 
    cout << "caught " << e.what() << endl;
  }
  return 0;
}