static void DP_Program()
{
Console.WriteLine("--------------------------------------------\n" +
" Observer Program \n" +
"--------------------------------------------");
Library2 tarver = new Library2(null, DPInitBookList);
Person2 anna = new Person2("Anna Smith");
Person2 brad = new Person2("Brad Cooper");
Person2 charles = new Person2("Charles Brown");
tarver.AddUser(anna);
tarver.AddUser(brad);
tarver.AddUser(charles);
//Anna checks out Great Expectations.
tarver.HandleBookRequest(anna, "Great Expectations");
//Now, Brad wants to check out the book, but Anna still has it.
tarver.HandleBookRequest(brad, "Great Expectations");
//Then, Anna finishes Great Expectations and returns it.
tarver.CheckInBook(anna);
//At this point, Brad should get his book.
//While Brad is reading Great Expectations,
// he wants to reserve American Gods.
tarver.HandleBookRequest(brad, "American Gods");
//Meanwhile, Charlie checks out American Gods.
tarver.HandleBookRequest(charles, "American Gods");
//Anna requests American Gods.
tarver.HandleBookRequest(anna, "American Gods");
//Even though Brad is on the wait list for American Gods,
// Anna receives it when Charlie returns it.
tarver.CheckInBook(charles);
//Anna returns American Gods.
tarver.CheckInBook(anna);
//Now Brad returns Great Expectations.
//Then, Brad gets American Gods right away.
tarver.CheckInBook(brad);
Console.ReadLine();
return;
}
public Subscription(Person2 person2, IObserver <Event> observer)
{
this.person2 = person2;
Observer = observer;
}