public SubscriptionReceiver(ServiceBusSettings settings, string topic, string subscription, bool processInParallel, ILogger <SubscriptionReceiver> logger)
{
this.settings = settings;
this.topic = topic;
this.subscription = subscription;
this.processInParallel = processInParallel;
this.logger = logger;
this.client = new SubscriptionClient(settings.ConnectionString, topic, subscription);
if (this.processInParallel)
{
this.client.PrefetchCount = 18;
}
else
{
this.client.PrefetchCount = 14;
}
dynamicThrottling =
new DynamicThrottling(
maxDegreeOfParallelism: 100,
minDegreeOfParallelism: 50,
penaltyAmount: 3,
workFailedPenaltyAmount: 5,
workCompletedParallelismGain: 1,
intervalForRestoringDegreeOfParallelism: 8000);
receiveRetryPolicy = Policy.Handle <Exception>().WaitAndRetryAsync(3, (r) => TimeSpan.FromMilliseconds(900),//, TimeSpan.FromSeconds(15), TimeSpan.FromSeconds(1));
(ex, ts, attemps, cc) =>
{
this.dynamicThrottling.Penalize();
logger.LogWarning($"An error occurred in attempt number {attemps} to receive a message from subscription {subscription}: {ex.Message}");
});
}
public FileChunkController(CloudBlobContainer container)
{
this.container = container ?? throw new ArgumentNullException(nameof(container));
// asyncronously handle transient exceptions by waiting 0.5 seconds, 2 seconds, 4 seconds, etc., before retrying, and finally throwing the exception
policy = Policy.Handle <Exception>().WaitAndRetryAsync(3, i => TimeSpan.FromSeconds(0.5 * Math.Pow(2, i)));
// syncronously handle transient file IO exceptions (excluding security exceptions) by waiting 0.5 seconds, 2 seconds, 4 seconds, etc., before retrying, and finally throwing the exception
policyFile = Policy.Handle <Exception>(ex => !(ex is SecurityException || ex is UnauthorizedAccessException))
.WaitAndRetry(3, i => TimeSpan.FromSeconds(0.5 * Math.Pow(2, i)));
}
public FileStitchController(ITopicClient topic, IHttpMessageFactory httpMessageFactory)
{
this.topic = topic ?? throw new ArgumentNullException(nameof(topic));
this.httpMessageFactory = httpMessageFactory ?? throw new ArgumentNullException(nameof(httpMessageFactory));
// asyncronously handle transient exceptions by waiting 0.5 seconds, 2 seconds, 4 seconds, etc., before retrying, and finally throwing the exception
policy = Policy.Handle <Exception>().WaitAndRetryAsync(Constants.MAX_TRANSIENT_EXCEPTIONS, i => TimeSpan.FromSeconds(0.5 * Math.Pow(2, i)));
// syncronously handle transient file IO exceptions (excluding security exceptions) by waiting 0.5 seconds, 2 seconds, 4 seconds, etc., before retrying, and finally throwing the exception
policyFile = Policy.Handle <Exception>(ex => !(ex is SecurityException || ex is UnauthorizedAccessException))
.WaitAndRetry(3, i => TimeSpan.FromSeconds(0.5 * Math.Pow(2, i)));
}
public OnPremUploadDownloadController(ITopicClient topic, CloudBlobContainer container, IHttpMessageFactory messageFactory, IConfiguration config)
{
this.topic = topic ?? throw new ArgumentNullException(nameof(topic));
this.container = container ?? throw new ArgumentNullException(nameof(container));
this.messageFactory = messageFactory ?? throw new ArgumentNullException(nameof(messageFactory));
this.config = config ?? throw new ArgumentNullException(nameof(config));
// asyncronously handle transient exceptions by waiting 0.5 seconds, 2 seconds, 4 seconds, etc., before retrying, and finally throwing the exception
policy = Policy.Handle <Exception>().WaitAndRetryAsync(3, i => TimeSpan.FromSeconds(0.5 * Math.Pow(2, i)));
// syncronously handle transient file IO exceptions (excluding security exceptions) by waiting 0.5 seconds, 2 seconds, 4 seconds, etc., before retrying, and finally throwing the exception
policyFile = Policy.Handle <Exception>(ex => !(ex is SecurityException || ex is UnauthorizedAccessException))
.WaitAndRetry(3, i => TimeSpan.FromSeconds(0.5 * Math.Pow(2, i)));
}
/// <summary>
/// Initializes a new instance of the <see cref="SessionSubscriptionReceiver"/> class,
/// automatically creating the topic and subscription if they don't exist.
/// </summary>
public SessionSubscriptionReceiver(ServiceBusSettings settings, string topic, string subscription, bool requiresSequentialProcessing, ILogger <SessionSubscriptionReceiver> logger)
{
this.settings = settings;
this.topic = topic;
this.subscription = subscription;
this.requiresSequentialProcessing = requiresSequentialProcessing;
this.logger = logger;
client = new SubscriptionClient(settings.ConnectionString, topic, subscription, ReceiveMode.PeekLock, Microsoft.Azure.ServiceBus.RetryPolicy.Default);
if (this.requiresSequentialProcessing)
{
this.client.PrefetchCount = 10;
}
else
{
this.client.PrefetchCount = 15;
}
this.dynamicThrottling =
new DynamicThrottling(
maxDegreeOfParallelism: 160,
minDegreeOfParallelism: 30,
penaltyAmount: 3,
workFailedPenaltyAmount: 5,
workCompletedParallelismGain: 1,
intervalForRestoringDegreeOfParallelism: 10000);
this.receiveRetryPolicy = Policy.Handle <Exception>()
.WaitAndRetryAsync(10, retry => TimeSpan.FromSeconds(Math.Pow(2, retry)),
(ex, ts, attempt, context) =>
{
this.dynamicThrottling.Penalize();
logger.LogWarning($"An error occurred in attempt number {attempt} to receive a message from subscription {subscription}: {ex.Message}");
});
}
