using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
public interface IDocument {
string Title {
get;
}
string Content {
get;
}
}
public class Document : IDocument {
private string title;
public string Title {
get {
return title;
}
}
private string content;
public string Content {
get {
return content;
}
}
public Document(string title, string content) {
this.title = title;
this.content = content;
}
}
public class ProcessDocuments<T, U>
where T : IDocument
where U : IDocumentManager<T> {
public static void Start(U dm) {
new Thread(new ThreadStart(new ProcessDocuments<T, U>(dm).Run)).Start();
}
protected ProcessDocuments(U dm) {
documentManager = dm;
}
private U documentManager;
protected void Run() {
while (true) {
if (documentManager.IsDocumentAvailable) {
T doc = documentManager.GetDocument();
Console.WriteLine("Processing document {0}", doc.Title);
}
Thread.Sleep(new Random().Next(20));
}
}
}
public interface IDocumentManager<T> {
void AddDocument(T doc);
T GetDocument();
bool IsDocumentAvailable {
get;
}
}
public class DocumentManager<T> : IDocumentManager<T> {
private readonly Queue<T> documentQueue = new Queue<T>();
public void AddDocument(T doc) {
lock (this) {
documentQueue.Enqueue(doc);
}
}
public T GetDocument() {
T doc = default(T);
lock (this) {
doc = documentQueue.Dequeue();
}
return doc;
}
public bool IsDocumentAvailable {
get {
return (documentQueue.Count > 0) ? true : false;
}
}
}
class Program {
static void Main(string[] args) {
DocumentManager<Document> dm = new DocumentManager<Document>();
ProcessDocuments<Document, DocumentManager<Document>>.Start(dm);
for (int i = 0; i < 1000; i++) {
Document doc = new Document("Doc " + i.ToString(), "content");
dm.AddDocument(doc);
Console.WriteLine("added document {0}", doc.Title);
Thread.Sleep(new Random().Next(20));
}
}
}
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