How to use Dispose method of PuppeteerSharp.Helpers.TaskQueue class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Helpers.TaskQueue.Dispose

Page.cs

Source:Page.cs

...1328        }1329        #endregion1330        #region IDisposable1331        /// <inheritdoc />1332        public void Dispose()1333        {1334            Dispose(true);1335            GC.SuppressFinalize(this);1336        }1337        /// <summary>1338        /// Releases all resource used by the <see cref="Page"/> object by calling the <see cref="CloseAsync"/> method.1339        /// </summary>1340        /// <remarks>Call <see cref="Dispose()"/> when you are finished using the <see cref="Page"/>. The1341        /// <see cref="Dispose()"/> method leaves the <see cref="Page"/> in an unusable state. After1342        /// calling <see cref="Dispose()"/>, you must release all references to the <see cref="Page"/> so1343        /// the garbage collector can reclaim the memory that the <see cref="Page"/> was occupying.</remarks>1344        /// <param name="disposing">Indicates whether disposal was initiated by <see cref="Dispose()"/> operation.</param>1345        protected virtual void Dispose(bool disposing) => _ = CloseAsync();1346        #endregion1347    }1348}...

Browser.cs

Source:Browser.cs

...218            => (await Connection.SendAsync<BrowserGetVersionResponse>("Browser.getVersion").ConfigureAwait(false)).UserAgent;219        /// <summary>220        /// Disconnects Puppeteer from the browser, but leaves the process running. After calling <see cref="Disconnect"/>, the browser object is considered disposed and cannot be used anymore221        /// </summary>222        public void Disconnect() => Connection.Dispose();223        /// <summary>224        /// Closes Chromium and all of its pages (if any were opened). The browser object itself is considered disposed and cannot be used anymore225        /// </summary>226        /// <returns>Task</returns>227        public Task CloseAsync() => _closeTask ?? (_closeTask = CloseCoreAsync());228        /// <summary>229        /// This searches for a target in this specific browser context.230        /// <example>231        /// <code>232        /// <![CDATA[233        /// await page.EvaluateAsync("() => window.open('https://www.example.com/')");234        /// var newWindowTarget = await browserContext.WaitForTargetAsync((target) => target.Url == "https://www.example.com/");235        /// ]]>236        /// </code>237        /// </example>238        /// </summary>239        /// <param name="predicate">A function to be run for every target</param>240        /// <param name="options">options</param>241        /// <returns>Resolves to the first target found that matches the predicate function.</returns>242        public async Task<Target> WaitForTargetAsync(Func<Target, bool> predicate, WaitForOptions options = null)243        {244            int timeout = options?.Timeout ?? DefaultWaitForTimeout;245            var existingTarget = Targets().FirstOrDefault(predicate);246            if (existingTarget != null)247            {248                return existingTarget;249            }250            var targetCompletionSource = new TaskCompletionSource<Target>(TaskCreationOptions.RunContinuationsAsynchronously);251            void TargetHandler(object sender, TargetChangedArgs e)252            {253                if (predicate(e.Target))254                {255                    targetCompletionSource.TrySetResult(e.Target);256                }257            }258            try259            {260                TargetCreated += TargetHandler;261                TargetChanged += TargetHandler;262                return await targetCompletionSource.Task.WithTimeout(timeout).ConfigureAwait(false);263            }264            finally265            {266                TargetCreated -= TargetHandler;267                TargetChanged -= TargetHandler;268            }269        }270        private async Task CloseCoreAsync()271        {272            try273            {274                try275                {276                    // Initiate graceful browser close operation but don't await it just yet,277                    // because we want to ensure process shutdown first.278                    var browserCloseTask = Connection.IsClosed279                        ? Task.CompletedTask280                        : Connection.SendAsync("Browser.close", null);281                    if (Launcher != null)282                    {283                        // Notify process that exit is expected, but should be enforced if it284                        // doesn't occur withing the close timeout.285                        var closeTimeout = TimeSpan.FromMilliseconds(CloseTimeout);286                        await Launcher.EnsureExitAsync(closeTimeout).ConfigureAwait(false);287                    }288                    // Now we can safely await the browser close operation without risking keeping chromium289                    // process running for indeterminate period.290                    await browserCloseTask.ConfigureAwait(false);291                }292                finally293                {294                    Disconnect();295                }296            }297            catch (Exception)298            {299                if (Launcher != null)300                {301                    await Launcher.KillAsync().ConfigureAwait(false);302                }303            }304            // Ensure that remaining targets are always marked closed, so that asynchronous page close305            // operations on any associated pages don't get blocked.306            foreach (var target in TargetsMap.Values)307            {308                target.CloseTaskWrapper.TrySetResult(false);309            }310            Closed?.Invoke(this, new EventArgs());311        }312        #endregion313        #region Private Methods314        internal void ChangeTarget(Target target)315        {316            var args = new TargetChangedArgs { Target = target };317            TargetChanged?.Invoke(this, args);318            target.BrowserContext.OnTargetChanged(this, args);319        }320        internal async Task<Page> CreatePageInContextAsync(string contextId)321        {322            var createTargetRequest = new TargetCreateTargetRequest323            {324                Url = "about:blank"325            };326            if (contextId != null)327            {328                createTargetRequest.BrowserContextId = contextId;329            }330            string targetId = (await Connection.SendAsync<TargetCreateTargetResponse>("Target.createTarget", createTargetRequest)331                .ConfigureAwait(false)).TargetId;332            var target = TargetsMap[targetId];333            await target.InitializedTask.ConfigureAwait(false);334            return await target.PageAsync().ConfigureAwait(false);335        }336        internal async Task DisposeContextAsync(string contextId)337        {338            await Connection.SendAsync("Target.disposeBrowserContext", new TargetDisposeBrowserContextRequest339            {340                BrowserContextId = contextId341            }).ConfigureAwait(false);342            _contexts.Remove(contextId);343        }344        private async void Connection_Disconnected(object sender, EventArgs e)345        {346            try347            {348                await CloseAsync().ConfigureAwait(false);349                Disconnected?.Invoke(this, new EventArgs());350            }351            catch (Exception ex)352            {353                string message = $"Browser failed to process Connection Close. {ex.Message}. {ex.StackTrace}";354                Connection.Close(message);355            }356        }357        private async void Connect_MessageReceived(object sender, MessageEventArgs e)358        {359            try360            {361                switch (e.MessageID)362                {363                    case "Target.targetCreated":364                        await CreateTargetAsync(e.MessageData.ToObject<TargetCreatedResponse>(true)).ConfigureAwait(false);365                        return;366                    case "Target.targetDestroyed":367                        await DestroyTargetAsync(e.MessageData.ToObject<TargetDestroyedResponse>(true)).ConfigureAwait(false);368                        return;369                    case "Target.targetInfoChanged":370                        ChangeTargetInfo(e.MessageData.ToObject<TargetCreatedResponse>(true));371                        return;372                }373            }374            catch (Exception ex)375            {376                string message = $"Browser failed to process {e.MessageID}. {ex.Message}. {ex.StackTrace}";377                Connection.Close(message);378            }379        }380        private void ChangeTargetInfo(TargetCreatedResponse e)381        {382            if (!TargetsMap.ContainsKey(e.TargetInfo.TargetId))383            {384                throw new InvalidTargetException("Target should exists before ChangeTargetInfo");385            }386            var target = TargetsMap[e.TargetInfo.TargetId];387            target.TargetInfoChanged(e.TargetInfo);388        }389        private async Task DestroyTargetAsync(TargetDestroyedResponse e)390        {391            if (!TargetsMap.ContainsKey(e.TargetId))392            {393                throw new InvalidTargetException("Target should exists before DestroyTarget");394            }395            var target = TargetsMap[e.TargetId];396            TargetsMap.Remove(e.TargetId);397            target.CloseTaskWrapper.TrySetResult(true);398            if (await target.InitializedTask.ConfigureAwait(false))399            {400                var args = new TargetChangedArgs { Target = target };401                TargetDestroyed?.Invoke(this, args);402                target.BrowserContext.OnTargetDestroyed(this, args);403            }404        }405        private async Task CreateTargetAsync(TargetCreatedResponse e)406        {407            var targetInfo = e.TargetInfo;408            string browserContextId = targetInfo.BrowserContextId;409            if (!(browserContextId != null && _contexts.TryGetValue(browserContextId, out var context)))410            {411                context = DefaultContext;412            }413            var target = new Target(414                e.TargetInfo,415                () => Connection.CreateSessionAsync(targetInfo),416                context);417            TargetsMap[e.TargetInfo.TargetId] = target;418            if (await target.InitializedTask.ConfigureAwait(false))419            {420                var args = new TargetChangedArgs { Target = target };421                TargetCreated?.Invoke(this, args);422                context.OnTargetCreated(this, args);423            }424        }425        internal static async Task<Browser> CreateAsync(426            Connection connection,427            string[] contextIds,428            bool ignoreHTTPSErrors,429            ViewPortOptions defaultViewPort,430            LauncherBase launcher)431        {432            var browser = new Browser(connection, contextIds, ignoreHTTPSErrors, defaultViewPort, launcher);433            await connection.SendAsync("Target.setDiscoverTargets", new TargetSetDiscoverTargetsRequest434            {435                Discover = true436            }).ConfigureAwait(false);437            return browser;438        }439        #endregion440        #region IDisposable441        /// <inheritdoc />442        public void Dispose()443        {444            Dispose(true);445            GC.SuppressFinalize(this);446        }447        /// <summary>448        /// Closes <see cref="Connection"/> and any Chromium <see cref="Process"/> that was449        /// created by Puppeteer.450        /// </summary>451        /// <param name="disposing">Indicates whether disposal was initiated by <see cref="Dispose()"/> operation.</param>452        protected virtual void Dispose(bool disposing) => _ = CloseAsync();453        #endregion454    }455}...

Connection.cs

Source:Connection.cs

...241            }242            return new Connection(url, connectionOptions.SlowMo, transport);243        }244        /// <inheritdoc />245        public void Dispose()246        {247            Dispose(true);248            GC.SuppressFinalize(this);249        }250        /// <summary>251        /// Releases all resource used by the <see cref="Connection"/> object.252        /// It will raise the <see cref="Disconnected"/> event and dispose <see cref="Transport"/>.253        /// </summary>254        /// <remarks>Call <see cref="Dispose()"/> when you are finished using the <see cref="Connection"/>. The255        /// <see cref="Dispose()"/> method leaves the <see cref="Connection"/> in an unusable state.256        /// After calling <see cref="Dispose()"/>, you must release all references to the257        /// <see cref="Connection"/> so the garbage collector can reclaim the memory that the258        /// <see cref="Connection"/> was occupying.</remarks>259        /// <param name="disposing">Indicates whether disposal was initiated by <see cref="Dispose()"/> operation.</param>260        protected virtual void Dispose(bool disposing)261        {262            Close("Connection disposed");263            Transport.Dispose();264        }265        #endregion266    }267}...

WebSocketTransport.cs

Source:WebSocketTransport.cs

...110            Closed?.Invoke(this, EventArgs.Empty);111            IsClosed = true;112        }113        /// <inheritdoc/>114        public void Dispose() => _client?.Dispose();115    }116}...

TaskQueue.cs

Source:TaskQueue.cs

...8    {9        [SuppressMessage("Usage", "CA2213: Disposable fields should be disposed", Justification = "The disposable field is being disposed asynchronously.")]10        [SuppressMessage("CodeQuality", "IDE0079:Remove unnecessary suppression", Justification = "The CA2213 suppression is actually necessary.")]11        private readonly SemaphoreSlim _semaphore;12        private bool _isDisposed;13        internal TaskQueue() => _semaphore = new SemaphoreSlim(1);14        internal async Task<T> Enqueue<T>(Func<Task<T>> taskGenerator)15        {16            await _semaphore.WaitAsync().ConfigureAwait(false);17            try18            {19                return await taskGenerator().ConfigureAwait(false);20            }21            finally22            {23                _semaphore.Release();24            }25        }26        internal async Task Enqueue(Func<Task> taskGenerator)27        {28            await _semaphore.WaitAsync().ConfigureAwait(false);29            try30            {31                await taskGenerator().ConfigureAwait(false);32            }33            finally34            {35                _semaphore.Release();36            }37        }38        public void Dispose()39        {40            Dispose(true);41            GC.SuppressFinalize(this);42        }43        protected virtual void Dispose(bool dispose)44        {45            if (_isDisposed)46            {47                return;48            }49            if (dispose)50            {51                _ = Task.Run(() => DisposeAsync());52            }53            _isDisposed = true;54        }55        [SuppressMessage("Usage", "CA1816:Dispose methods should call SuppressFinalize", Justification = "Per MSDN instructions for implementing the IAsyncDisposable pattern.")]56        public async ValueTask DisposeAsync()57        {58            await DisposeAsyncCore();59            Dispose(false);60            GC.SuppressFinalize(this);61        }62        protected virtual async ValueTask DisposeAsyncCore()63        {64            await _semaphore.WaitAsync().ConfigureAwait(false);65            _semaphore.Dispose();66        }67    }68}

Dispose

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4{5    {6        static async Task Main(string[] args)7        {

Dispose

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4{5    {6        static void Main(string[] args)7        {8            MainAsync().GetAwaiter().GetResult();9        }10        static async Task MainAsync()11        {12            var taskQueue = new TaskQueue();13            await taskQueue.Enqueue(() => Task.Delay(1000));14            await taskQueue.Enqueue(() => Task.Delay(1000));15            await taskQueue.Enqueue(() => Task.Delay(1000));16            taskQueue.Dispose();17            await taskQueue.Enqueue(() => Task.Delay(1000));18        }19    }20}

Dispose

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        public TaskQueue()7        {8            _queue = new TaskCompletionSource<object>();9            _queue.SetResult(null);10        }11        private TaskCompletionSource<object> _queue;12        public async Task<T> Enqueue<T>(Func<Task<T>> taskGenerator)13        {14            var previous = _queue.Task;15            var next = new TaskCompletionSource<object>();16            _queue.SetResult(next);17            await previous.ConfigureAwait(false);18            {19                return await taskGenerator().ConfigureAwait(false);20            }21            {22                next.SetResult(null);23            }24        }25        public void Dispose()26        {27            _queue?.TrySetCanceled();28            _queue = null;29        }30    }31}32using System;33using System.Threading.Tasks;34using PuppeteerSharp;35{36    {37        public TaskQueue()38        {39            _queue = new TaskCompletionSource<object>();40            _queue.SetResult(null);41        }42        private TaskCompletionSource<object> _queue;43        public async Task<T> Enqueue<T>(Func<Task<T>> taskGenerator)44        {45            var previous = _queue.Task;46            var next = new TaskCompletionSource<object>();47            _queue.SetResult(next);48            await previous.ConfigureAwait(false);49            {50                return await taskGenerator().ConfigureAwait(false);51            }52            {53                next.SetResult(null);54            }55        }56        public void Dispose()57        {58            _queue?.TrySetCanceled();59            _queue = null;60        }61    }62}63using System;64using System.Threading.Tasks;65using PuppeteerSharp;66{67    {68        public TaskQueue()69        {70            _queue = new TaskCompletionSource<object>();71            _queue.SetResult(null);72        }73        private TaskCompletionSource<object> _queue;74        public async Task<T> Enqueue<T>(Func<Task<T>> taskGenerator)75        {76            var previous = _queue.Task;77            var next = new TaskCompletionSource<object>();

Dispose

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4{5    {6        private readonly Task _completedTask = Task.FromResult(true);7        private readonly object _lock = new object();8        private Task _lastTask = Task.FromResult(true);9        public Task Enqueue(Func<Task> taskFactory)10        {11            lock (_lock)12            {13                _lastTask = _lastTask.ContinueWith(async _ =>14                {15                    await taskFactory();16                }).Unwrap();17                return _lastTask;18            }19        }20        public void Dispose()21        {22            Enqueue(() => _completedTask).Wait();23        }24    }25}26using System;27using System.Threading.Tasks;28{29    {30        private readonly Task _completedTask = Task.FromResult(true);31        private readonly object _lock = new object();32        private Task _lastTask = Task.FromResult(true);33        public Task Enqueue(Func<Task> taskFactory)34        {35            lock (_lock)36            {37                _lastTask = _lastTask.ContinueWith(async _ =>38                {39                    await taskFactory();40                }).Unwrap();41                return _lastTask;42            }43        }44        public void Dispose()45        {46            Enqueue(() => _completedTask).Wait();47        }48    }49}50using System;51using System.Threading.Tasks;52{53    {54        private readonly Task _completedTask = Task.FromResult(true);55        private readonly object _lock = new object();56        private Task _lastTask = Task.FromResult(true);57        public Task Enqueue(Func<Task> taskFactory)58        {59            lock (_lock)60            {61                _lastTask = _lastTask.ContinueWith(async _ =>62                {63                    await taskFactory();64                }).Unwrap();65                return _lastTask;66            }67        }68        public void Dispose()69        {70            Enqueue(() => _completedTask).Wait();71        }72    }73}74using System;75using System.Threading.Tasks;76{77    {78        private readonly Task _completedTask = Task.FromResult(true);79        private readonly object _lock = new object();80        private Task _lastTask = Task.FromResult(true);

Dispose

Using AI Code Generation

1var options = new LaunchOptions {Headless = true};2using var browser = await Puppeteer.LaunchAsync(options);3var page = await browser.NewPageAsync();4var title = await page.TitleAsync();5Console.WriteLine(title);6await page.CloseAsync();7await browser.CloseAsync();8var options = new LaunchOptions {Headless = true};9using var browser = await Puppeteer.LaunchAsync(options);10var page = await browser.NewPageAsync();11var title = await page.TitleAsync();12Console.WriteLine(title);13await page.CloseAsync();14await browser.CloseAsync();15var options = new LaunchOptions {Headless = true};16using var browser = await Puppeteer.LaunchAsync(options);17var page = await browser.NewPageAsync();18var title = await page.TitleAsync();19Console.WriteLine(title);20await page.CloseAsync();21await browser.CloseAsync();22var options = new LaunchOptions {Headless = true};23using var browser = await Puppeteer.LaunchAsync(options);24var page = await browser.NewPageAsync();25var title = await page.TitleAsync();26Console.WriteLine(title);27await page.CloseAsync();28await browser.CloseAsync();29var options = new LaunchOptions {Headless = true};30using var browser = await Puppeteer.LaunchAsync(options);31var page = await browser.NewPageAsync();32var title = await page.TitleAsync();33Console.WriteLine(title);34await page.CloseAsync();35await browser.CloseAsync();36var options = new LaunchOptions {Headless = true};37using var browser = await Puppeteer.LaunchAsync(options);38var page = await browser.NewPageAsync();39var title = await page.TitleAsync();

Dispose

Using AI Code Generation

1using System;2{3    {4        private readonly SemaphoreSlim _semaphore = new SemaphoreSlim(1, 1);5        private readonly Queue<TaskCompletionSource<object>> _queue = new Queue<TaskCompletionSource<object>>();6        public async Task<T> Enqueue<T>(Func<Task<T>> taskFunc)7        {8            var tcs = new TaskCompletionSource<object>();9            lock (_queue)10            {11                _queue.Enqueue(tcs);12            }13            await _semaphore.WaitAsync().ConfigureAwait(false);14            {15                var task = taskFunc();16                tcs.SetResult(null);17                return await task.ConfigureAwait(false);18            }19            {20                _semaphore.Release();21                lock (_queue)22                {23                    _queue.Dequeue();24                }25            }26        }27        public void Dispose()28        {29            _semaphore.Dispose();30            lock (_queue)31            {32                while (_queue.Count > 0)33                {34                    var tcs = _queue.Dequeue();35                    tcs.TrySetCanceled();36                }37            }38        }39    }40}41using System;42using System.Threading.Tasks;43using PuppeteerSharp.Helpers;44{45    {46        private readonly TaskQueue _closeQueue = new TaskQueue();47        public async Task CloseAsync()48        {49            if (IsClosed)50            {51                return;52            }53            await _closeQueue.Enqueue(async () =>54            {55                await Connection.CloseAsync().ConfigureAwait(false);56                IsClosed = true;57            }).ConfigureAwait(false);58        }59    }60}61using System;62using System.Threading.Tasks;63using PuppeteerSharp.Helpers;64{65    {66        private readonly TaskQueue _closeQueue = new TaskQueue();67        public async Task CloseAsync()68        {69            if (IsClosed)70            {71                return;72            }73            await _closeQueue.Enqueue(async () =>74            {75                await Client.CloseAsync().ConfigureAwait(false);76                IsClosed = true;77            }).ConfigureAwait(false);78        }79    }80}

Dispose

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4{5    {6        static void Main(string[] args)7        {8            var taskQueue = new TaskQueue();9            var task1 = Task.Run(() => Console.WriteLine("Task1"));10            var task2 = Task.Run(() => Console.WriteLine("Task2"));11            var task3 = Task.Run(() => Console.WriteLine("Task3"));12            taskQueue.Enqueue(task1);13            taskQueue.Enqueue(task2);14            taskQueue.Enqueue(task3);15            taskQueue.Dispose();16            Console.WriteLine("TaskQueue object is disposed");17            Console.ReadLine();18        }19    }20}21PuppeteerSharp.Helpers.TaskQueue.Dispose(Boolean) Method22PuppeteerSharp.Helpers.TaskQueue.Dispose(Boolean) Method23PuppeteerSharp.Helpers.TaskQueue.Dispose(Boolean) Method24PuppeteerSharp.Helpers.TaskQueue.Dispose(Boolean) Method

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