internal static bool HasScriptWithEntityUse(this WorkflowConfiguration workflowConfiguration)
{
var hasActivityScriptWithEntityUse = workflowConfiguration.States
.SelectMany(s => s.Activities).Any(a => !string.IsNullOrEmpty(a.Script) && a.Script.Contains("entity"));
if (hasActivityScriptWithEntityUse)
{
return(true);
}
var hasEventHandlerScriptWithEntityUse = workflowConfiguration.States
.SelectMany(s => s.Events).Any(e => !string.IsNullOrEmpty(e.Script) && e.Script.Contains("entity"));
if (hasEventHandlerScriptWithEntityUse)
{
return(true);
}
var hasTransitionScriptWithEntityUse = workflowConfiguration.States
.SelectMany(s => s.Transitions).Any(t => !string.IsNullOrEmpty(t.ConditionScript) && t.ConditionScript.Contains("entity"));
if (hasTransitionScriptWithEntityUse)
{
return(true);
}
return(false);
}
internal static StateConfiguration GetStateConfigurationByCode(this WorkflowConfiguration workflowConfiguration, string code)
{
var stateConfiguration = workflowConfiguration.States.SingleOrDefault(s => string.Equals(s.Code, code, StringComparison.OrdinalIgnoreCase));
if (null == stateConfiguration)
{
throw new WorkflowException($"State [{code}] was not found in workflow [{workflowConfiguration.Code}]");
}
return(stateConfiguration);
}
internal static IEndpointConfiguration FindEndpointConfiguration(this WorkflowConfiguration workflowConfiguration, string code)
{
Guard.ArgumentNotNull(workflowConfiguration, nameof(workflowConfiguration));
Guard.ArgumentNotNull(workflowConfiguration.RuntimeConfiguration, nameof(workflowConfiguration.RuntimeConfiguration));
Guard.ArgumentNotNull(workflowConfiguration.RuntimeConfiguration.EndpointConfigurations, nameof(workflowConfiguration.RuntimeConfiguration.EndpointConfigurations));
foreach (var endpointConfigurationKvp in workflowConfiguration.RuntimeConfiguration.EndpointConfigurations)
{
var regex = new Regex(endpointConfigurationKvp.Key, RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
if (regex.Match(code).Success)
{
return(endpointConfigurationKvp.Value);
}
}
throw new WorkflowException($"Endpoint configuration for code [${code}] was not found for workflow [ID=${workflowConfiguration.Id}]");
}
internal static StateConfiguration GetStateConfigurationByType(this WorkflowConfiguration workflowConfiguration, StateTypeConfiguration stateType)
{
return(workflowConfiguration.States.Single(s => s.Type == stateType));
}
internal static EventConfiguration GetEventConfigurationByType(this WorkflowConfiguration workflowConfiguration, EventTypeConfiguration eventType)
{
return(workflowConfiguration.Events.FirstOrDefault(e => e.Type == eventType));
}
internal static EventConfiguration GetEventConfigurationByCode(this WorkflowConfiguration workflowConfiguration, string code)
{
return(workflowConfiguration.Events.FirstOrDefault(e => string.Equals(code, e.Code, StringComparison.OrdinalIgnoreCase)));
}
internal static StateConfiguration GetFailedStateConfiguration(this WorkflowConfiguration workflowConfiguration)
{
return(workflowConfiguration.States.Single(s => s.Type == StateTypeConfiguration.Failed));
}
/// <summary>
/// Validate workflow configuration against a number of invariants
/// </summary>
internal static void ValidateWorkflowConfiguration(WorkflowConfiguration workflowConfiguration)
{
WorkflowConfigurationException workflowConfigurationException = null;
// 1. make sure that workflow has exactly one initial state
var initialStateCount = workflowConfiguration.States.Count(s => s.Type == StateTypeConfiguration.Initial);
if (initialStateCount != 1)
{
AddValidationMessage(ref workflowConfigurationException, $"Workflow [{workflowConfiguration.Code}] must have exactly one initial state");
}
// 2. make sure that workflow has exactly one failed state
var failedStateCount = workflowConfiguration.States.Count(s => s.Type == StateTypeConfiguration.Initial);
if (failedStateCount != 1)
{
AddValidationMessage(ref workflowConfigurationException, $"Workflow [{workflowConfiguration.Code}] must have exactly one failed state");
}
// 3. there are no state code duplicates
var hasDuplicateState = workflowConfiguration.States
.Any(s => workflowConfiguration.States.Any(si => si != s && string.Equals(si.Code, s.Code, StringComparison.OrdinalIgnoreCase)));
if (hasDuplicateState)
{
AddValidationMessage(ref workflowConfigurationException, $"Workflow [{workflowConfiguration.Code}] must have unique states");
}
// 4. make sure that workflow has zero or exactly one parentToNestedInitial event
var parentToNestedInitialEventCount = workflowConfiguration.Events.Count(e => e.Type == EventTypeConfiguration.ParentToNestedInitial);
if (parentToNestedInitialEventCount > 1)
{
AddValidationMessage(ref workflowConfigurationException,
$"Workflow [{workflowConfiguration.Code}] must have zero or exactly one [{EventTypeConfiguration.ParentToNestedInitial:G}] event");
}
// 5. there are no event code duplicates
var hasDuplicateEvents = workflowConfiguration.Events
.Any(e => workflowConfiguration.Events.Any(ei => ei != e && string.Equals(ei.Code, e.Code, StringComparison.OrdinalIgnoreCase)));
if (hasDuplicateEvents)
{
AddValidationMessage(ref workflowConfigurationException, $"Workflow [{workflowConfiguration.Code}] must have unique events");
}
// 6. do not allow state to have events and incoming asynchronousImmediate transitions simultaneously
var statesWithEvents = workflowConfiguration.States.Where(s => s.Events.Any()).ToList();
var transitionsToStateWithEvents = workflowConfiguration.States.SelectMany(s => s.Transitions)
.Where(t => t.Type == TransitionTypeConfiguration.AsynchronousImmediate)
.Where(t => statesWithEvents.Any(s => s.Code == t.MoveToState));
if (transitionsToStateWithEvents.Any())
{
AddValidationMessage(ref workflowConfigurationException,
$"Workflow [{workflowConfiguration.Code}] has state(s) with events and incoming async transitions");
}
// 7. do not allow duplicated event declaration for the same state
var hasStatesWithDuplicatedEvent = statesWithEvents
.Any(s => s.Events.Any(e => s.Events
.Any(ei => ei != e && string.Equals(ei.Code, e.Code, StringComparison.OrdinalIgnoreCase))));
if (hasStatesWithDuplicatedEvent)
{
AddValidationMessage(ref workflowConfigurationException, $"Workflow [{workflowConfiguration.Code}] has state(s) with duplicated events");
}
// 8. make sure that activity -> retryPolicy -> onFailureTransitionToUse refers to an existing transition within the state
var statesWithCustomFailureTransitions = workflowConfiguration.States
.Where(s => s.Activities.Any(a => !string.IsNullOrEmpty(a.RetryPolicy.OnFailureTransitionToUse))).ToList();
if (statesWithCustomFailureTransitions.Any())
{
var hasMissConfiguredCustomFailureTransitions = statesWithCustomFailureTransitions
.Any(s => s.Activities
.Any(a => !string.IsNullOrEmpty(a.RetryPolicy.OnFailureTransitionToUse) && !s.Transitions
.Any(t => string.Equals(t.MoveToState, a.RetryPolicy.OnFailureTransitionToUse))));
if (hasMissConfiguredCustomFailureTransitions)
{
AddValidationMessage(ref workflowConfigurationException,
$"Workflow [{workflowConfiguration.Code}] has activity(s) with configured 'onFailureTransitionToUse' but state has no such transition");
}
}
if (null != workflowConfigurationException)
{
throw workflowConfigurationException;
}
}
public WorkflowConfiguration Parse(string content)
{
try
{
using (var textReader = new StringReader(content))
using (var xmlReader = XmlReader.Create(textReader))
{
var xDocument = XDocument.Load(xmlReader);
Guard.ArgumentNotNull(xDocument.Root, "document");
var idString = ParseAttributeString(xDocument.Root, "id");
var @class = ParseAttributeString(xDocument.Root, "class");
var code = ParseAttributeString(xDocument.Root, "code");
var name = ParseAttributeString(xDocument.Root, "name");
var versionString = ParseAttributeString(xDocument.Root, "version");
if (!Guid.TryParse(idString, out var id))
{
throw new Exception($"Can not convert [{idString}] to a Guid");
}
if (!Version.TryParse(versionString, out var version))
{
throw new Exception($"Can not convert [{versionString}] to a version");
}
Log.Verbose("Starting reading workflow [{code}], [{name}], [{version}] from XML", code, name, version);
var workflowConfiguration = new WorkflowConfiguration(id, @class, code, name, version);
var events = xDocument.Root.Element("events");
if (events != null)
{
foreach (var eventElement in events.Elements("event"))
{
var @event = ParseEvent(eventElement);
workflowConfiguration.Events.Add(@event);
}
}
var states = xDocument.Root.Element("states");
if (null != states)
{
foreach (var stateElement in states.Elements("state"))
{
var state = ParseState(stateElement);
workflowConfiguration.States.Add(state);
}
}
Log.Verbose("Workflow [{code}], [{name}], [{version}] has been read from XML", code, name, version);
WorkflowConfigurationValidator.ValidateWorkflowConfiguration(workflowConfiguration);
return(workflowConfiguration);
}
}
catch (WorkflowConfigurationException)
{
throw;
}
catch (Exception ex)
{
throw new WorkflowConfigurationException("An error has occurred during reading XML workflow", ex);
}
}