Subject<T> 클래스의 현재 instance 사용하는 모든 리소스를 해제하고 모든 관찰자 구독을 취소합니다.
네임스페이스:System.Reactive.Subjects
어셈블리: System.Reactive(System.Reactive.dll)
Syntax
'Declaration
Public Sub Dispose
'Usage
Dim instance As Subject
instance.Dispose()
public void Dispose()
public:
virtual void Dispose() sealed
abstract Dispose : unit -> unit
override Dispose : unit -> unit
public final function Dispose()
구현
예제
이 예제에서는 주체 클래스를 사용하는 방법을 보여 줍니다. 문자열 형식의 Subject instance 두 개의 예제 뉴스 피드를 구독하는 데 사용됩니다. 이러한 피드는 5초 이하의 간격으로 임의의 뉴스 헤드라인을 게시합니다. 그런 다음, 주체의 관찰 가능한 인터페이스에 대한 두 개의 구독이 만들어져 결합된 데이터 스트림을 받습니다. 한 구독은 데이터 스트림의 각 항목을 "모든 뉴스"로 보고합니다. 다른 구독은 스트림의 각 헤드라인을 필터링하여 로컬 헤드라인만 보고합니다. 구독은 모두 받은 각 헤드라인을 콘솔 창에 씁니다. 사용자가 Enter 키를 누르고 Dispose가 호출되어 두 구독을 모두 취소하면 처리가 종료됩니다.
using System;
using System.Reactive.Linq;
using System.Reactive.Subjects;
using System.Reactive.Concurrency;
using System.Threading;
namespace Example
{
class Program
{
static void Main()
{
//*****************************************************************************************************//
//*** ***//
//*** A subject acts similar to a proxy in that it acts as both a subscriber and a publisher ***//
//*** It's IObserver interface can be used to subscribe to multiple streams or sequences of data. ***//
//*** The data is then published through it's IObservable interface. ***//
//*** ***//
//*** In this example a simple string based subject is used to subscribe to multiple news feeds ***//
//*** that provide random news headlines. Subscribers can then subscribe to the subject's ***//
//*** observable interface to observe the data stream(s) or a subset ofthe stream(s). Below we ***//
//*** subscribe the subject to two different news headline feeds. Then two subscriptions are ***//
//*** created: one for delivery of all news headlines, the other receives only local news headlines ***//
//*** ***//
//*** A local news headline just contains the newsLocation substring ("in your area."). ***//
//*** ***//
//*****************************************************************************************************//
Subject<string> mySubject = new Subject<string>();
//*********************************************************//
//*** Create news feed #1 and subscribe mySubject to it ***//
//*********************************************************//
NewsHeadlineFeed NewsFeed1 = new NewsHeadlineFeed("Headline News Feed #1");
NewsFeed1.HeadlineFeed.Subscribe(mySubject);
//*********************************************************//
//*** Create news feed #2 and subscribe mySubject to it ***//
//*********************************************************//
NewsHeadlineFeed NewsFeed2 = new NewsHeadlineFeed("Headline News Feed #2");
NewsFeed2.HeadlineFeed.Subscribe(mySubject);
Console.WriteLine("Subscribing to news headline feeds.\n\nPress ENTER to exit.\n");
//*****************************************************************************************************//
//*** Create a subscription to the subject's observable sequence. This subscription will receive ***//
//*** all headlines. ***//
//*****************************************************************************************************//
IDisposable allNewsSubscription = mySubject.Subscribe(x =>
{
Console.WriteLine("Subscription : All news subscription\n{0}\n", x);
});
//*****************************************************************************************************//
//*** Create a subscription to the subject's observable sequence. This subscription will filter for ***//
//*** only local headlines. ***//
//*****************************************************************************************************//
IDisposable localNewsSubscription = mySubject.Where(x => x.Contains("in your area.")).Subscribe(x =>
{
Console.WriteLine("\n************************************\n" +
"***[ Local news headline report ]***\n" +
"************************************\n{0}\n\n", x);
});
Console.ReadLine();
//*********************************//
//*** Cancel both subscriptions ***//
//*********************************//
allNewsSubscription.Dispose();
localNewsSubscription.Dispose();
}
}
//*********************************************************************************//
//*** The NewsHeadlineFeed class is just a mock news feed in the form of an ***//
//*** observable sequence in Reactive Extensions. ***//
//*********************************************************************************//
class NewsHeadlineFeed
{
private string feedName; // Feedname used to label the stream
private IObservable<string> headlineFeed; // The actual data stream
private readonly Random rand = new Random(); // Used to stream random headlines.
//*** A list of predefined news events to combine with a simple location string ***//
static readonly string[] newsEvents = { "A tornado occurred ",
"Weather watch for snow storm issued ",
"A robbery occurred ",
"We have a lottery winner ",
"An earthquake occurred ",
"Severe automobile accident "};
//*** A list of predefined location strings to combine with a news event. ***//
static readonly string[] newsLocations = { "in your area.",
"in Dallas, Texas.",
"somewhere in Iraq.",
"Lincolnton, North Carolina",
"Redmond, Washington"};
public IObservable<string> HeadlineFeed
{
get { return headlineFeed; }
}
public NewsHeadlineFeed(string name)
{
feedName = name;
//*****************************************************************************************//
//*** Using the Generate operator to generate a continous stream of headline that occur ***//
//*** randomly within 5 seconds. ***//
//*****************************************************************************************//
headlineFeed = Observable.Generate(RandNewsEvent(),
evt => true,
evt => RandNewsEvent(),
evt => { Thread.Sleep(rand.Next(5000)); return evt; },
Scheduler.ThreadPool);
}
//****************************************************************//
//*** Some very simple formatting of the headline event string ***//
//****************************************************************//
private string RandNewsEvent()
{
return "Feedname : " + feedName + "\nHeadline : " + newsEvents[rand.Next(newsEvents.Length)] +
newsLocations[rand.Next(newsLocations.Length)];
}
}
}
다음 출력은 예제 코드를 사용하여 생성되었습니다.
Subscribing to news headline feeds.
Press ENTER to exit.
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : A robbery occurred somewhere in Iraq.
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : An earthquake occurred in Dallas, Texas.
Subscription : All news subscription
Feedname : Headline News Feed #1
Headline : We have a lottery winner in your area.
********************************** [ 지역 뉴스 헤드 라인 보고서 ]********************************** 피드 이름 : 헤드 라인 뉴스 피드 #1 헤드 라인 : 우리는 당신의 지역에 복권 당첨자를 가지고있다.
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : Severe automobile accident Redmond, Washington
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : We have a lottery winner in Dallas, Texas.
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : An earthquake occurred in Dallas, Texas.
Subscription : All news subscription
Feedname : Headline News Feed #1
Headline : We have a lottery winner somewhere in Iraq.
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : Severe automobile accident somewhere in Iraq.
Subscription : All news subscription
Feedname : Headline News Feed #2
Headline : An earthquake occurred in your area.
********************************** [ 지역 뉴스 헤드 라인 보고서 ]********************************** 피드 이름: 헤드라인 뉴스 피드 #2 헤드라인: 해당 지역에서 지진이 발생했습니다.