C# ConcurrentBag类代码示例

        public IList<Type> GetExceptions(Assembly assembly, IEnumerable<Type> exceptionsToIgnore)
        {
            Type typeOfException = typeof(Exception);
            ConcurrentBag<Type> types = new ConcurrentBag<Type>();

            Parallel.ForEach(
                assembly.GetTypes(),
                type =>
                {
                    if (exceptionsToIgnore != null && exceptionsToIgnore.Any())
                    {
                        if (exceptionsToIgnore.Contains(type))
                        {
                            return;
                        }
                    }

                    if (typeOfException.IsAssignableFrom(type))
                    {
                        types.Add(type);
                    }
                });

            return types.ToList();
        }

        public TrueCraftGame(MultiplayerClient client, IPEndPoint endPoint)
        {
            Window.Title = "TrueCraft";
            Content.RootDirectory = "Content";
            Graphics = new GraphicsDeviceManager(this);
            Graphics.SynchronizeWithVerticalRetrace = false;
            Graphics.IsFullScreen = UserSettings.Local.IsFullscreen;
            Graphics.PreferredBackBufferWidth = UserSettings.Local.WindowResolution.Width;
            Graphics.PreferredBackBufferHeight = UserSettings.Local.WindowResolution.Height;
            Client = client;
            EndPoint = endPoint;
            NextPhysicsUpdate = DateTime.MinValue;
            ChunkMeshes = new List<Mesh>();
            IncomingChunks = new ConcurrentBag<Mesh>();
            PendingMainThreadActions = new ConcurrentBag<Action>();
            MouseCaptured = true;

            var keyboardComponent = new KeyboardComponent(this);
            KeyboardComponent = keyboardComponent;
            Components.Add(keyboardComponent);

            var mouseComponent = new MouseComponent(this);
            MouseComponent = mouseComponent;
            Components.Add(mouseComponent);
        }

        public void finish_successfully()
        {
            var handling = new AsyncHandling(ObjectMother.InvocationContext());
            var list = new ConcurrentBag<string>();

            var task1 = Task.Factory.StartNew(() => {
                Thread.Sleep(100);
                list.Add("A");
            });

            var task2 = Task.Factory.StartNew(() => {
                Thread.Sleep(100);
                list.Add("B");
            });

            var task3 = Task.Factory.StartNew(() => {
                Thread.Sleep(100);
                list.Add("C");
            });

            handling.Push(task1);
            handling.Push(task2);
            handling.Push(task3);

            handling.WaitForAll();

            list.OrderBy(x => x).ShouldHaveTheSameElementsAs("A", "B", "C");
        }

        public void ShouldBeUnique()
        {
            var generatedIds = new ConcurrentBag<Guid>();

            var tasks = new List<Task>();

            var i = Count;
            while (i-- > 0)
            {
                tasks.Add(
                    Task.Factory.StartNew(
                        () =>
                        {
                            for (var j = 0; j < 100; j++)
                            {
                                var id = SeqGuid.NewGuid();
                                generatedIds.Add(id);
                            }
                        }));
            }

            Task.WaitAll(tasks.ToArray());

            Assert.That(new HashSet<Guid>(generatedIds).Count, Is.EqualTo(Count * 100));
        }

 public TestPlan(string name, int iterationsCount, Action<int> action)
 {
     Name = name;
     IterationsCount = iterationsCount;
     Action = action;
     Results = new ConcurrentBag<TestResult>();
 }

        public World()
        {
            worldTime = new DateTime();
            rooms = new List<Room>();
            rooms.Add(new Room("The Void", "You are standing in the middle of nothing."));
            mobs = new ConcurrentBag<NPC>();

            NPC test = new NPC("mob", "A slimy sticky stinky mob", new Stats(50, 100), this);
            rooms.First().addNPC(test);
            mobs.Add(test);
            test = new NPC("bob", "A slimy sticky stinky bob", new Stats(50, 100), this);
            rooms.First().addNPC(test);
            mobs.Add(test);
            test = new NPC("sob", "A slimy sticky stinky sob", new Stats(50, 100), this);
            rooms.First().addNPC(test);
            mobs.Add(test);
            test = new NPC("cob", "A slimy sticky stinky cob", new Stats(50, 100), this);
            rooms.First().addNPC(test);
            mobs.Add(test);

            Merchant merch = new Merchant();
            merch.name = "merchant";
            merch.description = "a merchant of souls";
            merch.world = this;
            merch.stats = new Stats(10000, 10000);
            Item i = new Item("health", "a potion of restore health", 1, "none", 1);
            merch.items.addToInventory(i);
            rooms.First().addNPC(merch);
            mobs.Add(merch);

            rooms.First().addItem(new Item("leggings", "a worn pair of leather leggings", 2, "legs", 2));
        }

        public static void TestBasicScenarios()
        {
            ConcurrentBag<int> cb = new ConcurrentBag<int>();
            Task[] tks = new Task[2];
            tks[0] = Task.Run(() =>
                {
                    cb.Add(4);
                    cb.Add(5);
                    cb.Add(6);
                });

            // Consume the items in the bag 
            tks[1] = Task.Run(() =>
                {
                    int item;
                    while (!cb.IsEmpty)
                    {
                        bool ret = cb.TryTake(out item);
                        Assert.True(ret);
                        // loose check
                        Assert.Contains(item, new[] { 4, 5, 6 });
                    }
                });

            Task.WaitAll(tks);
        }

        public void Instance_ThreadSafe()
        {

            using (var gate = new Barrier(5))
            {
                var result = new ConcurrentBag<AnyConstructorFinder>();

                Action test = () =>
                {
                    gate.SignalAndWait(20);

                    var instance = AnyConstructorFinder.Instance;

                    Thread.MemoryBarrier();

                    result.Add(instance);
                };

                var cycleState = Parallel.For(0, 200,
                    new ParallelOptions { MaxDegreeOfParallelism = 15 },
                    x => { test(); })
                    ;

                while (!cycleState.IsCompleted) 
                {
                    Thread.Sleep(100);
                }

                Assert.IsTrue(result.All(x => x != null));
                Assert.IsTrue(result.Distinct().Count() == 1);
            }
        }

        protected override IEnumerable<Achievement> GetUnlockedAchievements(StatisAnalysisSession statisAnalysisSession, IEnumerable<Achievement> availableAchievements)
        {
            var unlockedAchievements = new ConcurrentBag<Achievement>();
            var tasks = new Task[availableAchievements.Count()];
            var i = 0;

            foreach (var uncompletedAchievement in availableAchievements)
            {
                var a = uncompletedAchievement;

                tasks[i++] = Task.Factory.StartNew(() =>
                {
                    /*   Technically we create a lot of objects all the time.
                     *   It's possible that these objects could have a lifespan longer than just a session.
                     *   However maintaining state is always a PITA */
                    var achievement = (StaticAnalysisAchievementBase)Activator.CreateInstance(a.AchievementType);

                    if (achievement.IsAchievementUnlocked(statisAnalysisSession))
                    {
                        a.CodeOrigin = achievement.AchievementCodeOrigin;
                        a.IsCompleted = true;
                        unlockedAchievements.Add(a);
                    }
                });
            }

            Task.WaitAll(tasks);

            return unlockedAchievements;
        }

        public IEnumerable<IDocument> Execute(IReadOnlyList<IDocument> inputs, IExecutionContext context)
        {
            // Get syntax trees (supply path so that XML doc includes can be resolved)
            ConcurrentBag<SyntaxTree> syntaxTrees = new ConcurrentBag<SyntaxTree>();
            Parallel.ForEach(inputs, input =>
            {
                using (Stream stream = input.GetStream())
                {
                    SourceText sourceText = SourceText.From(stream);
                    syntaxTrees.Add(CSharpSyntaxTree.ParseText(sourceText, 
                        path: input.String(Keys.SourceFilePath, string.Empty)));
                }
            });

            // Create the compilation (have to supply an XmlReferenceResolver to handle include XML doc comments)
            MetadataReference mscorlib = MetadataReference.CreateFromFile(typeof(object).Assembly.Location);
            CSharpCompilation compilation = CSharpCompilation
                .Create("CodeAnalysisModule", syntaxTrees)
                .WithReferences(mscorlib)
                .WithOptions(new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary,
                    xmlReferenceResolver: new XmlFileResolver(context.InputFolder)));

            // Get and return the document tree
            AnalyzeSymbolVisitor visitor = new AnalyzeSymbolVisitor(context, _symbolPredicate,
                _writePath ?? (x => DefaultWritePath(x, _writePathPrefix)), _cssClasses, _docsForImplicitSymbols);
            visitor.Visit(compilation.Assembly.GlobalNamespace);
            return visitor.Finish();
        }

        public virtual async Task<CodeAction> GetFixAsync(
            ImmutableDictionary<Document, ImmutableArray<Diagnostic>> documentsAndDiagnosticsToFixMap,
            FixAllContext fixAllContext)
        {
            if (documentsAndDiagnosticsToFixMap != null && documentsAndDiagnosticsToFixMap.Any())
            {
                FixAllLogger.LogDiagnosticsStats(documentsAndDiagnosticsToFixMap);

                var fixesBag = new ConcurrentBag<CodeAction>();

                using (Logger.LogBlock(FunctionId.CodeFixes_FixAllOccurrencesComputation_Fixes, fixAllContext.CancellationToken))
                {
                    fixAllContext.CancellationToken.ThrowIfCancellationRequested();

                    var documents = documentsAndDiagnosticsToFixMap.Keys.ToImmutableArray();
                    var options = new ParallelOptions() { CancellationToken = fixAllContext.CancellationToken };
                    Parallel.ForEach(documents, options, document =>
                    {
                        fixAllContext.CancellationToken.ThrowIfCancellationRequested();
                        AddDocumentFixesAsync(document, documentsAndDiagnosticsToFixMap[document], fixesBag.Add, fixAllContext).Wait(fixAllContext.CancellationToken);
                    });
                }

                if (fixesBag.Any())
                {
                    using (Logger.LogBlock(FunctionId.CodeFixes_FixAllOccurrencesComputation_Merge, fixAllContext.CancellationToken))
                    {
                        FixAllLogger.LogFixesToMergeStats(fixesBag);
                        return await TryGetMergedFixAsync(fixesBag, fixAllContext).ConfigureAwait(false);
                    }
                }
            }

            return null;
        }

        /// <summary>
        /// Creates a buffer pool.
        /// </summary>
        /// <param name="bufferSize">The size, in bytes, of each buffer.</param>
        /// <param name="maxBuffers">The maximum number of buffers to keep around, unused; by default, the number of unused buffers is unbounded.</param>
        /// <param name="preallocationSize">Initial number of buffers to allocate.</param>
        /// <param name="name">Name of the buffer pool.</param>
        private BufferPool(int bufferSize, int maxBuffers, int preallocationSize, string name)
        {
            Name = name;
            byteBufferSize = bufferSize;
            maxBuffersCount = maxBuffers;
            limitBuffersCount = maxBuffers > 0;
            buffers = new ConcurrentBag<byte[]>();

            var globalPoolSizeStat = IntValueStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_BUFFERS_INPOOL,
                                                                    () => Count);
            allocatedBufferCounter = CounterStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_ALLOCATED_BUFFERS);
            checkedOutBufferCounter = CounterStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_CHECKED_OUT_BUFFERS);
            checkedInBufferCounter = CounterStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_CHECKED_IN_BUFFERS);
            droppedBufferCounter = CounterStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_DROPPED_BUFFERS);
            droppedTooLargeBufferCounter = CounterStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_DROPPED_TOO_LARGE_BUFFERS);

            // Those 2 counters should be equal. If not, it means we don't release all buffers.
            IntValueStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_INUSE_CHECKED_OUT_NOT_CHECKED_IN_BUFFERS,
                () => checkedOutBufferCounter.GetCurrentValue()
                      - checkedInBufferCounter.GetCurrentValue()
                      - droppedBufferCounter.GetCurrentValue());

            IntValueStatistic.FindOrCreate(StatisticNames.SERIALIZATION_BUFFERPOOL_INUSE_ALLOCATED_NOT_INPOOL_BUFFERS,
                () => allocatedBufferCounter.GetCurrentValue()
                      - globalPoolSizeStat.GetCurrentValue()
                      - droppedBufferCounter.GetCurrentValue());

            if (preallocationSize <= 0) return;

            var dummy = GetMultiBuffer(preallocationSize * Size);
            Release(dummy);
        }

 public RabbitConnection(ILog log, int maxModels, IConnection connection)
 {
     _connection = connection;
     _log = log;
     _asyncLock = new AsyncLock(maxModels);
     _models = new ConcurrentBag<IModel>(Enumerable.Range(0, maxModels).Select(_ => connection.CreateModel()));
 }

        static void Main(string[] args)
        {
            ConcurrentBag<int> bag = new ConcurrentBag<int>();
            bag.Add(42);
            bag.Add(21);

            int result;
            if (bag.TryTake(out result))
            {
                Console.WriteLine(result);
            }

            if (bag.TryPeek(out result))
            {
                Console.WriteLine("There is a next item: {0}", result);
            }

            if (bag.TryTake(out result))
            {
                Console.WriteLine(result);
            }

            Console.Write("Press a key to exit");
            Console.ReadKey();
        }

        public IEnumerable<INews> FirstNews()
        {
            var newsInstance = InterNewsBL.Instance;
            var newsList = new ConcurrentBag<INews>();
            try
            {
                var result = newsInstance.SelectTopNews();
                result.AsParallel().AsOrdered().ForAll(val =>
                {
                    newsList.Add(new News
                    {
                        NewsID = val.NewsID,
                        DisplayOrder = val.DisplayOrder,
                        Heading = val.Heading,
                        ImageUrl = val.ImageUrl,
                        ShortDesc = val.ShortDescription,
                        IsRss = val.IsRss,
                        //NewsDesc= val.NewsDescription,
                        DttmCreated = val.DttmCreated
                    });

                });

            }
            catch (Exception)
            {
                throw;
            }
            finally
            {
                newsInstance.Dispose();
            }

            return newsList.OrderByDescending(v => v.DttmCreated);
        }