gistfile1.java

public void run(){
double N = 20000;
for ( int i=0; i<N; i++ ){
     BasicDBObject o = new BasicDBObject( "_id" , UPTO.getAndIncrement() );
     coll.insert( o );
   }
   db.getLastError(2); // commit
}

.....


db = mongo.getDB( "test" );
coll = db.getCollection( "Foo" );