public PeriodicReader(ILogger <PeriodicReader> logger,
IConfiguration configuration,
IHardwareMonitor hardwareMonitor,
ISensorCacheMutator sensorCacheMutator)
{
_logger = logger;
_periodicity = configuration.GetValue <int>(ConfigurationConstants.PeriodicityKey);
_hardwareMonitor = hardwareMonitor;
_sensorCacheMutator = sensorCacheMutator;
}
public RendererPoolBlock(IHardwareMonitor hardwareMonitor, Func <IHtmlRenderer> getHtmlRenderer, ILog log)
{
_log = log;
_hardwareMonitor = hardwareMonitor;
_counter = new Counter();
Events = new BufferBlock <Event>(new DataflowBlockOptions {
EnsureOrdered = true
});
CreateHtmlRenderer();
CreateAndDestroyHtmlRenderersAdaptively();
#region Local Functions
void CreateHtmlRenderer()
{
if (!this.Post(getHtmlRenderer()))
{
log.Info($"Failed to post newly created {nameof(HtmlRenderer)} to {nameof(RendererPoolBlock)}.");
}
_counter.CreatedHtmlRenderCount++;
}
void CreateAndDestroyHtmlRenderersAdaptively()
{
hardwareMonitor.OnLowCpuAndMemoryUsage += (averageCpuUsage, memoryUsage) =>
{
if (OutputCount > 0 || _counter.CreatedHtmlRenderCount == Configurations.MaxHtmlRendererCount)
{
return;
}
try
{
CreateHtmlRenderer();
log.Info(
$"Low CPU usage ({averageCpuUsage}%) and low memory usage ({memoryUsage}%) detected. " +
$"Browser count increased from {_counter.CreatedHtmlRenderCount - 1} to {_counter.CreatedHtmlRenderCount}."
);
}
catch (Exception exception)
{
log.Error($"Failed to create {nameof(HtmlRenderer)}.", exception);
}
};
hardwareMonitor.OnHighCpuOrMemoryUsage += (averageCpuUsage, memoryUsage) =>
{
if (_counter.CreatedHtmlRenderCount == 1)
{
return;
}
this.Receive().Dispose();
_counter.CreatedHtmlRenderCount--;
if (averageCpuUsage == null && memoryUsage == null)
{
throw new ArgumentException(nameof(averageCpuUsage), nameof(memoryUsage));
}
if (averageCpuUsage != null && memoryUsage != null)
{
log.Info(
$"High CPU usage ({averageCpuUsage}%) and high memory usage ({memoryUsage}%) detected. " +
$"Browser count decreased from {_counter.CreatedHtmlRenderCount + 1} to {_counter.CreatedHtmlRenderCount}."
);
}
else if (averageCpuUsage != null)
{
log.Info(
$"High CPU usage ({averageCpuUsage}%) detected. " +
$"Browser count decreased from {_counter.CreatedHtmlRenderCount + 1} to {_counter.CreatedHtmlRenderCount}."
);
}
else
{
log.Info(
$"High memory usage ({memoryUsage}%) detected. " +
$"Browser count decreased from {_counter.CreatedHtmlRenderCount + 1} to {_counter.CreatedHtmlRenderCount}."
);
}
};
}
#endregion
}
public NetworkServicePool(Configurations configurations, IEventBroadcaster eventBroadcaster, IHardwareMonitor hardwareMonitor,
IMemory memory, ILog log, Func <IResourceExtractor> getResourceExtractor, Func <IResourceVerifier> getResourceVerifier,
Func <IHtmlRenderer> getHtmlRenderer)
{
_log = log;
_objectDisposed = false;
_statistics = new Statistics();
_eventBroadcaster = eventBroadcaster;
_resourceExtractorPool = new BlockingCollection <IResourceExtractor>();
_resourceVerifierPool = new BlockingCollection <IResourceVerifier>();
_htmlRendererPool = new BlockingCollection <IHtmlRenderer>();
PreCreateServices();
CreateAndDestroyHtmlRenderersAdaptively();
void PreCreateServices()
{
PreCreateResourceExtractors();
PreCreateResourceVerifiers();
CreateHtmlRenderer();
void PreCreateResourceExtractors()
{
for (var resourceExtractorId = 0; resourceExtractorId < configurations.ResourceExtractorCount; resourceExtractorId++)
{
var resourceExtractor = getResourceExtractor();
_resourceExtractorPool.Add(resourceExtractor);
_statistics.CreatedResourceExtractorCount++;
}
}
void PreCreateResourceVerifiers()
{
for (var resourceVerifierId = 0; resourceVerifierId < configurations.ResourceVerifierCount; resourceVerifierId++)
{
var resourceVerifier = getResourceVerifier();
_resourceVerifierPool.Add(resourceVerifier);
_statistics.CreatedResourceVerifierCount++;
}
}
}
void CreateAndDestroyHtmlRenderersAdaptively()
{
hardwareMonitor.OnLowCpuAndMemoryUsage += (averageCpuUsage, memoryUsage) =>
{
if (_htmlRendererPool.Count > 0 || _statistics.CreatedHtmlRendererCount == configurations.MaxHtmlRendererCount)
{
return;
}
CreateHtmlRenderer();
var createdHtmlRendererCount = _statistics.CreatedHtmlRendererCount;
_log.Info(
$"Low CPU usage ({averageCpuUsage}%) and low memory usage ({memoryUsage}%) detected. " +
$"Browser count increased from {createdHtmlRendererCount - 1} to {createdHtmlRendererCount}."
);
};
hardwareMonitor.OnHighCpuOrMemoryUsage += (averageCpuUsage, memoryUsage) =>
{
if (_statistics.CreatedHtmlRendererCount == 1)
{
return;
}
_htmlRendererPool.Take().Dispose();
_statistics.CreatedHtmlRendererCount--;
if (averageCpuUsage == null && memoryUsage == null)
{
throw new ArgumentException(nameof(averageCpuUsage), nameof(memoryUsage));
}
var createdHtmlRendererCount = _statistics.CreatedHtmlRendererCount;
if (averageCpuUsage != null && memoryUsage != null)
{
_log.Info(
$"High CPU usage ({averageCpuUsage}%) and high memory usage ({memoryUsage}%) detected. " +
$"Browser count decreased from {createdHtmlRendererCount + 1} to {createdHtmlRendererCount}."
);
}
else if (averageCpuUsage != null)
{
_log.Info(
$"High CPU usage ({averageCpuUsage}%) detected. " +
$"Browser count decreased from {createdHtmlRendererCount + 1} to {createdHtmlRendererCount}."
);
}
else
{
_log.Info(
$"High memory usage ({memoryUsage}%) detected. " +
$"Browser count decreased from {createdHtmlRendererCount + 1} to {createdHtmlRendererCount}."
);
}
};
}
void CreateHtmlRenderer()
{
var htmlRenderer = getHtmlRenderer();
htmlRenderer.OnResourceCaptured += memory.MemorizeToBeVerifiedResource;
_htmlRendererPool.Add(htmlRenderer);
_statistics.CreatedHtmlRendererCount++;
}
}
public BrokenLinkCollectionWorkflow(CancellationToken cancellationToken, Configurations configurations, IStatistics statistics,
IHardwareMonitor hardwareMonitor, IResourceExtractor resourceExtractor, IReportWriter reportWriter, ILog log,
IResourceEnricher resourceEnricher, IResourceVerifier resourceVerifier, Func <IHtmlRenderer> getHtmlRenderer)
{
_log = log;
_coordinatorBlock = new CoordinatorBlock(cancellationToken, log);
_eventBroadcasterBlock = new EventBroadcasterBlock(cancellationToken);
_processingResultGeneratorBlock = new ProcessingResultGeneratorBlock(cancellationToken, resourceExtractor, log);
_reportWriterBlock = new ReportWriterBlock(cancellationToken, reportWriter, log);
_resourceEnricherBlock = new ResourceEnricherBlock(cancellationToken, resourceEnricher, log);
_resourceVerifierBlock = new ResourceVerifierBlock(cancellationToken, statistics, resourceVerifier, log);
_htmlRendererBlock = new HtmlRendererBlock(
cancellationToken,
statistics,
log,
configurations,
hardwareMonitor,
getHtmlRenderer
);
WireUpBlocks();
void WireUpBlocks()
{
var generalDataflowLinkOptions = new DataflowLinkOptions {
PropagateCompletion = true
};
_coordinatorBlock.LinkTo(NullTarget <Resource>(), PropagateNullObjectsOnly <Resource>());
_coordinatorBlock.LinkTo(_resourceEnricherBlock, generalDataflowLinkOptions);
_resourceEnricherBlock.LinkTo(NullTarget <Resource>(), PropagateNullObjectsOnly <Resource>());
_resourceEnricherBlock.LinkTo(_resourceVerifierBlock, generalDataflowLinkOptions);
_resourceEnricherBlock.FailedProcessingResults.LinkTo(_coordinatorBlock);
_resourceVerifierBlock.LinkTo(NullTarget <Resource>(), PropagateNullObjectsOnly <Resource>());
_resourceVerifierBlock.LinkTo(_htmlRendererBlock, generalDataflowLinkOptions);
_resourceVerifierBlock.FailedProcessingResults.LinkTo(_coordinatorBlock);
_resourceVerifierBlock.VerificationResults.LinkTo(_reportWriterBlock);
_resourceVerifierBlock.Events.LinkTo(_eventBroadcasterBlock);
_htmlRendererBlock.LinkTo(NullTarget <RenderingResult>(), PropagateNullObjectsOnly <RenderingResult>());
_htmlRendererBlock.LinkTo(_processingResultGeneratorBlock, generalDataflowLinkOptions);
_htmlRendererBlock.VerificationResults.LinkTo(_reportWriterBlock, generalDataflowLinkOptions);
_htmlRendererBlock.FailedProcessingResults.LinkTo(_coordinatorBlock);
_htmlRendererBlock.Events.LinkTo(_eventBroadcasterBlock, generalDataflowLinkOptions);
_processingResultGeneratorBlock.LinkTo(NullTarget <ProcessingResult>(), PropagateNullObjectsOnly <ProcessingResult>());
_processingResultGeneratorBlock.LinkTo(_coordinatorBlock);
_eventBroadcasterBlock.LinkTo(NullTarget <Event>(), PropagateNullObjectsOnly <Event>());
Predicate <T> PropagateNullObjectsOnly <T>()
{
return(@object => @object == null);
}
ITargetBlock <T> NullTarget <T>()
{
return(DataflowBlock.NullTarget <T>());
}
}
}
public HtmlRendererBlock(CancellationToken cancellationToken, IStatistics statistics, ILog log, Configurations configurations,
IHardwareMonitor hardwareMonitor, Func <IHtmlRenderer> getHtmlRenderer) : base(cancellationToken, maxDegreeOfParallelism: 300)
{
_log = log;
_statistics = statistics;
_cancellationToken = cancellationToken;
_htmlRenderers = new BlockingCollection <IHtmlRenderer>();
(int createdHtmlRenderCount, int disposedHtmlRendererCount)counter = (0, 0);
var generalDataflowBlockOptions = new DataflowBlockOptions {
CancellationToken = cancellationToken
};
VerificationResults = new BufferBlock <VerificationResult>(generalDataflowBlockOptions);
FailedProcessingResults = new BufferBlock <FailedProcessingResult>(generalDataflowBlockOptions);
Events = new BufferBlock <Event>(new DataflowBlockOptions {
EnsureOrdered = true, CancellationToken = cancellationToken
});
base.Completion.ContinueWith(_ =>
{
FailedProcessingResults.Complete();
VerificationResults.Complete();
DisposeHtmlRenderers();
Events.Complete();
CheckMemoryLeak();
void CheckMemoryLeak()
{
if (counter.disposedHtmlRendererCount == counter.createdHtmlRenderCount)
{
return;
}
var resourceName = $"{nameof(HtmlRenderer)}{(counter.createdHtmlRenderCount > 1 ? "s" : string.Empty)}";
var disposedCountText = counter.disposedHtmlRendererCount == 0 ? "none" : $"only {counter.disposedHtmlRendererCount}";
_log.Warn(
"Orphaned resources detected! " +
$"{counter.createdHtmlRenderCount} {resourceName} were created but {disposedCountText} could be found and disposed."
);
}
void DisposeHtmlRenderers()
{
while (_htmlRenderers.Any())
{
_htmlRenderers.Take().Dispose();
counter.disposedHtmlRendererCount++;
var webBrowserClosedEvent = new Event
{
EventType = EventType.StopProgressUpdated,
Message = $"Closing web browsers ({counter.disposedHtmlRendererCount}/{counter.createdHtmlRenderCount}) ..."
};
if (!Events.Post(webBrowserClosedEvent))
{
_log.Error($"Failed to post data to buffer block named [{nameof(Events)}].");
}
}
_htmlRenderers?.Dispose();
}
});
CreateHtmlRenderer();
CreateAndDestroyHtmlRenderersAdaptively();
void CreateHtmlRenderer()
{
_htmlRenderers.Add(getHtmlRenderer(), CancellationToken.None);
counter.createdHtmlRenderCount++;
}
void CreateAndDestroyHtmlRenderersAdaptively()
{
hardwareMonitor.OnLowCpuAndMemoryUsage += (averageCpuUsage, memoryUsage) =>
{
if (_htmlRenderers.Count > 0 || counter.createdHtmlRenderCount == configurations.MaxHtmlRendererCount)
{
return;
}
CreateHtmlRenderer();
_log.Info(
$"Low CPU usage ({averageCpuUsage}%) and low memory usage ({memoryUsage}%) detected. " +
$"Browser count increased from {counter.createdHtmlRenderCount - 1} to {counter.createdHtmlRenderCount}."
);
};
hardwareMonitor.OnHighCpuOrMemoryUsage += (averageCpuUsage, memoryUsage) =>
{
if (counter.createdHtmlRenderCount == 1)
{
return;
}
_htmlRenderers.Take().Dispose();
counter.createdHtmlRenderCount--;
if (averageCpuUsage == null && memoryUsage == null)
{
throw new ArgumentException(nameof(averageCpuUsage), nameof(memoryUsage));
}
if (averageCpuUsage != null && memoryUsage != null)
{
_log.Info(
$"High CPU usage ({averageCpuUsage}%) and high memory usage ({memoryUsage}%) detected. " +
$"Browser count decreased from {counter.createdHtmlRenderCount + 1} to {counter.createdHtmlRenderCount}."
);
}
else if (averageCpuUsage != null)
{
_log.Info(
$"High CPU usage ({averageCpuUsage}%) detected. " +
$"Browser count decreased from {counter.createdHtmlRenderCount + 1} to {counter.createdHtmlRenderCount}."
);
}
else
{
_log.Info(
$"High memory usage ({memoryUsage}%) detected. " +
$"Browser count decreased from {counter.createdHtmlRenderCount + 1} to {counter.createdHtmlRenderCount}."
);
}
};
}
}