public void Record(string action, string reason, string message, V1ObjectReference objRef)
{
var occurrence = DateTime.Now;
var key = new EventKey($"{objRef.ApiVersion}/{objRef.Kind}", action, reason, message, $"{objRef.NamespaceProperty}/{objRef.Name}");
if (!events.ContainsKey(key))
{
Logger.LogDebug("Initializing new EventDetail entry for {objName}", key.ToString());
events.Add(key, EventDetails.Initialize(objRef.Name, occurrence));
}
EventDetails details = events[key];
details.AddOccurrence(occurrence);
Logger.LogDebug("Writing event to Kubernetes ({key}, Count: {count}", key.ToString(), details.Count);
V1Event ev = new V1Event(objRef,
new V1ObjectMeta()
{
Name = details.Name
},
action: action,
message: message,
reason: reason,
firstTimestamp: details.FirstSeen,
lastTimestamp: details.LastSeen,
count: details.Count);
Kubernetes.ReplaceNamespacedEventAsync(ev, details.Name, objRef.NamespaceProperty);
}
private async Task<string> DescribeObject(Kubernetes client, V1Namespace ns, V1Event o, StringBuilder buffer)
{
var fetched = await client.ReadNamespacedEventAsync(o.Metadata.Name, ns.Metadata.Name).ConfigureAwait(false);
buffer.AppendLine($"API Veresion: {fetched.ApiVersion}");
buffer.AppendLine($"Kind: {fetched.Kind}");
buffer.AppendLine(DescribeMetadata(fetched.Metadata));
return $"Event - {fetched.Metadata.Name}";
}
/// <summary>
/// Gets the matching <see cref="V1EventFilter"/> for the specified <see cref="V1Event"/>
/// </summary>
/// <param name="e">The <see cref="V1Event"/> to get the matching <see cref="V1EventFilter"/> for</param>
/// <returns>The matching <see cref="V1EventFilter"/> for the specified <see cref="V1Event"/>, if any</returns>
public virtual V1EventFilter?GetMatchingFilterFor(V1Event e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
return(this.Filters.FirstOrDefault(f => f.Filters(e)));
}
/// <summary>
/// Determines whether or not the <see cref="V1CorrelationCondition"/> matches the specified <see cref="V1Event"/>
/// </summary>
/// <param name="e">The <see cref="V1Event"/> to match</param>
/// <returns>A boolean indicating whether or not the <see cref="V1CorrelationCondition"/> matches the specified <see cref="V1Event"/></returns>
public virtual bool Matches(V1Event e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
return(this.GetMatchingFilterFor(e) != null);
}
/// <summary>
/// Gets the first matching <see cref="V1CorrelationCondition"/> for the specified <see cref="V1Event"/>
/// </summary>
/// <param name="e">The <see cref="V1Event"/> to get the <see cref="V1CorrelationCondition"/> for</param>
/// <returns>The first matching <see cref="V1CorrelationCondition"/> for the specified <see cref="V1Event"/>, if any</returns>
public virtual V1CorrelationCondition?GetMatchingConditionFor(V1Event e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
return(this.Conditions.FirstOrDefault(c => c.Matches(e)));
}
/// <summary>
/// Determines whether or not the specified <see cref="V1Event"/> matches one of the <see cref="V1Correlation"/>'s conditions
/// </summary>
/// <param name="e">The <see cref="V1Event"/> to check</param>
/// <returns>A boolean indicating whether or not the specified <see cref="V1Event"/> matches one of the <see cref="V1Correlation"/>'s conditions</returns>
public virtual bool AppliesTo(V1Event e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
return(this.GetMatchingConditionFor(e) != null);
}
public void EmitEvent(string action, string reason, string message, CustomResource involvedObject)
{
var objRef = new V1ObjectReference(involvedObject.ApiVersion, kind: involvedObject.Kind, name: involvedObject.Metadata.Name, namespaceProperty: involvedObject.Metadata.NamespaceProperty);
V1Event ev = new V1Event(objRef, new V1ObjectMeta()
{
GenerateName = involvedObject.Metadata.Name
}, action: action, message: message, reason: reason, firstTimestamp: DateTime.Now);
client.CreateNamespacedEvent(ev, involvedObject.Metadata.NamespaceProperty);
}
/// <inheritdoc/>
public virtual async Task <bool> TryCorrelateAsync(V1Event e, IEnumerable <string> mappingKeys, CancellationToken cancellationToken = default)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
if (mappingKeys == null)
{
mappingKeys = Array.Empty <string>();
}
return(await this.SynapseRuntimeApi.TryCorrelateAsync(new() { WorkflowInstanceId = this.Instance.Id, Event = e, MappingKeys = mappingKeys }, cancellationToken));
}
/// <summary>
/// Generates a Cloud Event for a Kubernetes Event (v1 schema)
/// </summary>
/// <param name="kubernetesEvent">Event that occured in Kubernetes cluster</param>
public CloudEvent GenerateFromKubernetesEvent(V1Event kubernetesEvent)
{
Guard.NotNull(kubernetesEvent, nameof(kubernetesEvent));
var eventId = kubernetesEvent.Metadata.Uid ?? Guid.NewGuid().ToString();
var eventTime = kubernetesEvent.LastTimestamp ?? DateTime.UtcNow;
var cloudEvent = new CloudEvent(CloudEventsSpecVersion.V0_1, DefaultEventType, EventSource, eventId, eventTime)
{
ContentType = new ContentType(contentType: "application/json"),
Data = kubernetesEvent
};
return(cloudEvent);
}
/// <summary>
/// Ingests the specified <see cref="CloudEvent"/>
/// </summary>
/// <param name="serviceProvider">The current <see cref="IServiceProvider"/></param>
/// <param name="e">The <see cref="CloudEvent"/> to ingest</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/></param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task CorrelateAsync(IServiceProvider serviceProvider, CloudEvent e, CancellationToken cancellationToken)
{
try
{
var mediator = serviceProvider.GetRequiredService <IMediator>();
await mediator.ExecuteAndUnwrapAsync(new V1CorrelateEventCommand(V1Event.CreateFrom(e)), cancellationToken);
}
catch (TaskCanceledException)
{
throw;
}
catch (Exception ex)
{
this.Logger.LogError("An error occured while processing an incoming cloud event: {ex}", ex.ToString());
}
}
/// <summary>
/// Handles an incoming <see cref="CloudEvent"/>
/// </summary>
/// <param name="e">The <see cref="CloudEvent"/> to handle</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/></param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task OnEventAsync(CloudEvent e)
{
using (await this.Lock.LockAsync(this.CancellationTokenSource.Token))
{
if (this.IdleTimer != null)
{
this.IdleTimer.Dispose();
this.IdleTimer = null !;
}
if ((!string.IsNullOrWhiteSpace(this.EventDefinition.Source) && !Regex.IsMatch(e.Source !.ToString(), this.EventDefinition.Source, RegexOptions.IgnoreCase)) ||
(!string.IsNullOrWhiteSpace(this.EventDefinition.Type) && !Regex.IsMatch(e.Type !, this.EventDefinition.Type, RegexOptions.IgnoreCase)))
{
return;
}
if (!await this.Context.Workflow.TryCorrelateAsync(V1Event.CreateFrom(e), this.EventDefinition.Correlations?.Select(c => c.ContextAttributeName) !, this.CancellationTokenSource.Token))
{
return;
}
await this.OnNextAsync(new V1WorkflowActivityCompletedIntegrationEvent(this.Activity.Id, e.Data), this.CancellationTokenSource.Token);
await this.OnCompletedAsync(this.CancellationTokenSource.Token);
}
}
private async Task Update()
{
Item = await State.Client.ReadNamespacedEventAsync(Name, Namespace);
StateHasChanged();
}
private async Task HandleKubernetesEvent(WatchEventType type, V1Event kubernetesEvent)
{
var cloudEvent = _cloudEventsSchematizer.GenerateFromKubernetesEvent(kubernetesEvent);
await _cloudEventsPublisher.Publish(cloudEvent);
}
/// <summary>
/// Initializes a new <see cref="V1GetEventCorrelationsQuery"/>
/// </summary>
/// <param name="e">The <see cref="V1Event"/> to get the matching <see cref="V1Correlation"/>s for</param>
public V1GetEventCorrelationsQuery(V1Event e)
{
this.Event = e;
}
/// <summary>
/// Performs a correlation on a <see cref="V1Event"/>, in a given <see cref="V1CorrelationContext"/> and using the specified <see cref="V1EventFilter"/>
/// </summary>
/// <param name="correlation">The <see cref="V1Correlation"/> to perform</param>
/// <param name="correlationContext">The <see cref="V1CorrelationContext"/> in which to perform the <see cref="V1Correlation"/></param>
/// <param name="e">The <see cref="V1Event"/> to correlate</param>
/// <param name="filter">The <see cref="V1EventFilter"/> used to correlate the <see cref="V1Event"/></param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/></param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task CorrelateAsync(V1Correlation correlation, V1CorrelationContext correlationContext, V1Event e, V1EventFilter filter, CancellationToken cancellationToken = default)
{
this.Logger.LogInformation("Correlating event to context with id '{contextId}'...", correlationContext.Id);
correlationContext.Correlate(e, filter.CorrelationMappings.Keys, true);
correlation = await this.Correlations.UpdateAsync(correlation, cancellationToken);
await this.Correlations.SaveChangesAsync(cancellationToken);
this.Logger.LogInformation("Event successfully correlated to context with id '{contextId}'", correlationContext.Id);
this.Logger.LogInformation("Attempting to complete the correlation with id '{correlationId}' in context with id '{contextId}'...", correlation.Id, correlationContext.Id);
if (!correlation.TryComplete(correlationContext))
{
this.Logger.LogInformation("Correlations conditions are not met in the specified correlation context");
return;
}
this.Logger.LogInformation("Correlation with id '{correlationId}' has been completed in context with id '{contextId}. Computing outcome...", correlation.Id, correlationContext.Id);
switch (correlation.Outcome.Type)
{
case V1CorrelationOutcomeType.Start:
await this.Mediator.ExecuteAndUnwrapAsync(new V1CreateWorkflowInstanceCommand(correlation.Outcome.Target, V1WorkflowInstanceActivationType.Trigger, new(), correlationContext, true, null), cancellationToken);
break;
case V1CorrelationOutcomeType.Correlate:
await this.Mediator.ExecuteAndUnwrapAsync(new V1CorrelateWorkflowInstanceCommand(correlation.Outcome.Target, correlationContext), cancellationToken);
break;
default:
throw new NotSupportedException($"The specified {nameof(V1CorrelationOutcomeType)} '{correlation.Outcome.Type}' is not supported");
}
correlation.ReleaseContext(correlationContext);
correlation = await this.Correlations.UpdateAsync(correlation, cancellationToken);
await this.Correlations.SaveChangesAsync(cancellationToken);
if (correlation.Lifetime == V1CorrelationLifetime.Singleton)
{
this.Logger.LogInformation("The correlation with id '{correlationId}' is a singleton and its context has been released. Disposing of it...", correlation.Id);
await this.Mediator.ExecuteAndUnwrapAsync(new V1DeleteCorrelationCommand(correlation.Id), cancellationToken);
this.Logger.LogInformation("The correlation with id '{correlationId}' has been successfully disposed of", correlation.Id);
}
this.Logger.LogInformation("Correlation outcome successfully computed");
}
/// <summary>
/// Initializes a new <see cref="V1CorrelateEventCommand"/>
/// </summary>
/// <param name="e">The <see cref="V1Event"/> to correlate</param>
public V1CorrelateEventCommand(V1Event e)
{
this.Event = e;
}
/// <summary>
/// Initializes a new <see cref="V1TryCorrelateWorkflowInstanceCommand"/>
/// </summary>
/// <param name="workflowInstanceId">The id of the <see cref="V1WorkflowInstance"/> to correlate</param>
/// <param name="e">The <see cref="V1Event"/> to correlate</param>
/// <param name="mappingKeys">An <see cref="IEnumerable{T}"/> containing the mapping keys to use to correlate the <see cref="V1WorkflowInstance"/></param>
public V1TryCorrelateWorkflowInstanceCommand(string workflowInstanceId, V1Event e, IEnumerable <string> mappingKeys)
{
this.WorkflowInstanceId = workflowInstanceId;
this.Event = e;
this.MappingKeys = mappingKeys;
}
