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scribe(this);
}
public virtual void Unsubscribe()
{
cancellation.Dispose();
flightInfos.Clear();
}
public virtual void OnCompleted()
{
flightInfos.Clear();
}
// No implementation needed: Method is not called by the BaggageHandler class.
public virtual void OnError(Exception e)
{
// No implementation.
}
// Update information.
public virtual void OnNext(BaggageInfo info)
{
bool updated = false;
// Flight has unloaded its baggage; remove from the monitor.
if (info.Carousel == 0) {
var flightsToRemove = new List<string>();
string flightNo = String.Format("{0,5}", info.FlightNumber);
foreach (var flightInfo in flightInfos) {
if (flightInfo.Substring(21, 5).Equals(flightNo)) {
flightsToRemove.Add(flightInfo);
updated = true;
}
}
foreach (var flightToRemove in flightsToRemove)
flightInfos.Remove(flightToRemove);
flightsToRemove.Clear();
}
else {
// Add flight if it does not exist in the collection.
string flightInfo = String.Format(fmt, info.From, info.FlightNumber, info.Carousel);
if (! flightInfos.Contains(flightInfo)) {
flightInfos.Add(flightInfo);
updated = true;
}
}
if (updated) {
flightInfos.Sort();
Console.WriteLine("Arrivals information from {0}", this.name);
foreach (var flightInfo in flightInfos)
Console.WriteLine(flightInfo);
Console.WriteLine();
}
}
}
using System;
using System.Collections.Generic;
public class Example
{
public static void Main()
{
//发布者
BaggageHandler provider = new BaggageHandler();
// 订阅者
ArrivalsMonitor observer1 = new ArrivalsMonitor("BaggageClaimMonitor1");
// 订阅者
ArrivalsMonitor observer2 = new ArrivalsMonitor("SecurityExit");
// 发布
provider.BaggageStatus(712, "Detroit", 3);
//订阅
observer1.Subscribe(provider);
provider.BaggageStatus(712, "Kalamazoo", 3);
provider.BaggageStatus(400, "New York-Kennedy", 1);
provider.BaggageStatus(712, "Detroit", 3);
observer2.Subscribe(provider);
provider.BaggageStatus(511, "San Francisco", 2);
provider.BaggageStatus(712);
observer2.Unsubscribe();
provider.BaggageStatus(400);
provider.LastBaggageClaimed();
}
}
View Code
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