The update introduces caching to workflow runtime and workflow management stores to enhance performance. This is achieved by adding decorators for several stores, which cache records to reduce database fetches. Additionally, a signaler for change tokens allows for cache invalidation when changes occur. The MemoryCache feature has also been updated to include Scrutor for decoration and the caching duration can be configured through the new CachingOptions class.

The WorkflowsMiddleware has been extensively refactored to handle HTTP Endpoint bookmarks and triggers. This involves breaking down the InvokeAsync method by extracting parts of its functionality into separate helper methods such as FindTriggersAsync and FindBookmarksAsync. Moreover, Assist with authorization checks, workflow execution within request timeout, and handling of workflow faults has been improved to be more efficient and clearly segmented.

The authorization process in the AuthenticationBasedHttpEndpointAuthorizationHandler class has been updated to use the Workflow context instead of the WorkflowInstanceId string. The AuthorizeHttpEndpointContext model has been correspondingly changed to include a Workflow property, thereby strengthening the link between authorization and specific workflows.

The code adjustments add new FindAsync methods to the trigger and bookmark store contracts as well as all their concrete implementations (MongoDb, Memory and EFCore). These methods support fetching the first record matching a given filter. The adjustments also include minor syntax improvements and the addition of [UsedImplicitly] attributes where needed.

The code was refactored to simplify the flow of handling workflows in the WorkflowsMiddleware class. Specifically, the methods to start and resume a workflow have been extracted to improve code readability. Further, handleErrorMiddlewares was also updated to better manage instances where no valid workflows or base paths are found.

Added IMemoryCache usage in the WorkflowsMiddleware to cache lookup results for workflows and their associated triggers. This will reduce the number of database operations required when searching for workflows, thus improving performance. The cache is maintained for one minute before it is refreshed.

The code has been updated to have a dynamic cache duration for the workflows instead of a hardcoded one minute. By using the CachingOptions service, the cache duration can now be set in the configuration making it more flexible and adaptable to different performance needs.

This commit includes the implementation of IHttpWorkflowsCacheManager for caching of HTTP workflows. New handlers have been added to invalidate cache on workflow updates. Additionally, WorkflowsMiddleware has been renamed to HttpWorkflowsMiddleware.

The refactoring includes deletion of `IndexWorkflowTriggersHandler.cs` and creation of `IndexTriggers.cs` thus revising the workflow trigger indexing approach. Also, revamped the `ITriggerIndexer` interface which now handles deletion of triggers with specific workflow and filter. Furthermore, the caching mechanism in `HttpWorkflowsCacheManager.cs` is modified to handle eviction of workflow definitions and triggers separately boosting its efficiency.

A summary has been added to the 'IndexedWorkflowTriggers' class, providing a brief description. This description outlines that it represents a collection of indexed workflow triggers, promoting clearer understanding for future reference.

This commit separates the memory caching feature from the Elsa.Common module into a distinct Elsa.Caching module. This includes moving and renaming related files, such as the MemoryCacheFeature class and associated dependencies. The references in other modules and in the main solution file have been updated accordingly to include the new Elsa.Caching module.

Introduced a distributed caching feature with extensible change token signal publishing. Updated various cache-related methods to be asynchronous for improved performance and responsiveness. Also updated some workflow identity references for clarity.

This addition includes the implementation of a distributed caching system with MassTransit transport. The changes introduce necessary interfaces and services, new distributed caching feature along with the support for MassTransit as a transport option. Moreover, the instance management feature has been renamed to clustering feature for better clarity.

Queue name construction is adjusted in the RabbitMqServiceBusFeature and AzureServiceBusFeature modules for better organization and readability. MassTransitChangeTokenSignalPublisher is now a singleton service, ensuring the signal publisher can be shared across the application, increasing efficiency and performance. Also, introduced use of DistributedCacheFeature in MassTransitDistributedCacheFeature module for better modularization.

This commit introduces caching to the workflow definition service, improving the performance for retrieving workflow definitions. 4 new classes have been created (`CachingWorkflowDefinitionService`, `EvictWorkflowDefinitionServiceCache`, `WorkflowDefinitionCacheManager`, and `IWorkflowDefinitionCacheManager`), and several existing classes have been updated to support caching. The caching also includes invalidation mechanisms, ensuring data consistency.

In the workflow definition module, the explicit caching functionality related to workflow definition versioning has been removed in favor of a more streamlined approach. Additionally, the manner in which services are registered has been altered. As a result, the caching now directly involves the overall workflow definition rather than individual versions, simplifying the caching logic and potentially improving the performance.

The MassTransitBroker has been updated to Memory from RabbitMq. In addition, the RealTimeWorkflows and UseWorkflowsSignalRHubs features are now enabled in the code. This change will impact how the service communicates and processes real-time requests for workflow operations.

The reformatting involves a list of variable types in the HttpFeature module. Each type now appears on a new line for improved readability, making the code easier to maintain and review.

Unnecessary using directives were deleted across several files in the Elsa.Http module. This simplifies the code and will possibly improve execution speed. Specific deletions include those for Encoding, Unicode, Extensions, Collections.Generic, Linq, Text, and Tasks namespaces.

This commit simplifies the HttpWorkflowsMiddleware class constructor. It removes the intermediary variables `_next` and `_options` and directly uses the passed arguments in the constructor. Now, the `next` and `options` parameters are used directly throughout the middleware.

This refactoring replaces the use of FindWorkflowDefinitionAsync and MaterializeWorkflowAsync with a single method, FindWorkflowAsync. This simplifies the middleware code and likely improves performance by reducing the number of database queries or service calls required to retrieve a workflow.

Simplified the workflow retrieval process in HttpBookmarkProcessor.cs. Replaced FindWorkflowDefinitionAsync and MaterializeWorkflowAsync methods with a single FindWorkflowAsync call. This reduces the complexity and improves efficiency in retrieving workflow.

Removed redundant lines of code to simplify workflow search functionality. This change simplified the FindWorkflowAsync method by directly calling the FindWorkflowAsync function in the workflowDefinitionService, thus increasing code readability and efficiency.

The method for obtaining a workflow in the Endpoint.cs script has been refactored and streamlined. The 'GetWorkflowDefinition' method is replaced by the 'GetWorkflowAsync' method which directly retrieves the workflow, without the intermediate step of materializing the workflow definition. This shortens the code and simplifies the process.

The constructor for InputFunctionsDefinitionProvider has been simplified by removing unnecessary private fields. Services are now directly used in the method instead of being stored in fields. This improves readability and reduces complexity in the class structure.

Simplified the methods for handling workflow and workflow state in the WorkflowInstance class. The refactoring also included some code clean-ups and variable renaming. The new implementation provides better readability and maintainability of the code by reducing unnecessary lines and improving structuring of objects and responses.

IBookmarkManager from ProtoActorWorkflowRuntime.cs file is removed due to its redundant status. Additionally, the "FindAsync" method has been updated to use a cancellation token. Also, annotations were added to the "ExportWorkflowStateAsync" and "ImportWorkflowStateAsync" methods to flag calls to functions that require unreferenced code.

Unused ReSharper directive in the file IndexTriggers.cs was identified and therefore removed. This change makes the code cleaner and easier to read.

Updated the DefaultBackgroundActivityInvoker service in the Elsa.Workflows.Runtime module to annotate the ExecuteAsync method with "RequiresUnreferencedCode" attribute. This change is made considering the potential code trimming issue. Additionally, simplified the process of fetching workflow by directly using FindWorkflowAsync method instead of FindWorkflowDefinitionAsync and MaterializeWorkflowAsync methods.

The code for finding and materializing workflow definitions has been simplified. Instead of loading the definition and materializing it into a workflow in separate steps, a new method called FindWorkflowAsync has been introduced to perform both actions at once. This reduces redundancy and makes the code more readable.

This commit simplifies the workflow creation process in WorkflowHostFactory. It removes redundant code and extraneous methods, specifically the overloaded CreateAsync method which used WorkflowDefinition. Now, it directly finds and uses the Workflow instance, thereby simplifying the code base and improving maintainability.

Changed the way workflow instances are retrieved from the WorkflowDefinitionService. Instead of obtaining the workflow definition and then materializing the workflow from it, the workflow is directly retrieved using the FindWorkflowAsync function. This simplifies the code and avoids unnecessary null-checks.

An extraneous whitespace character was identified and removed in the WorkflowInstance.cs file. This change contributes towards maintaining clean and readable code in the Elsa.ProtoActor module.

The unnecessary comment ("Load the workflow definition.") in the method TryStartWorkflowAsync of the ProtoActorWorkflowRuntime.cs file was removed. This is part of an ongoing effort to keep the codebase clean and readable.

Added explicit notification handlers for DeleteWorkflowInstances and RefreshActivityRegistry in WorkflowManagementFeature.cs. Also, renamed RefreshActivityRegistryHandler.cs to RefreshActivityRegistry.cs for better clarity.

The major change of this commit is the addition of methods to add multiple log records in the WorkflowExecutionLogStore, across different storage modules such as EntityFramework, MongoDB, Dapper, Elasticsearch and Memory. This ensures consistency and uniform behavior across different storage types. Furthermore, some reformatting and tidying up of the code were undertaken to maintain readability and clarity.

The workflow definition existence check and related service retrieval were removed from HttpWorkflowsMiddleware.cs. It was determined that this check was unnecessary as the workflow definition's existence is guaranteed at this point in the process, reducing redundancy in the code.

This commit refines the usage of cancellation tokens during the execution of workflows in Elsa.Server and HttpWorkflowsMiddleware. Previously, a cancellation token pair was created before ExecuteWithinTimeoutAsync was called, which limited duration control solely to that method. Now, cancellation tokens are included within ExecuteWithinTimeoutAsync method. This allows the method to observe any cancellation initiated by outer scopes, enhancing control over the timeout of operations.

A new PersistStateAsync method has been added to the WorkflowHost, which enables the host to directly persist its own state. The method has been integrated into the DefaultWorkflowRuntime and HttpWorkflowsMiddleware. This update eliminates the need to continuously get instances of IWorkflowInstanceManager to save state, which improves efficiency and code readability.

This update simplifies the DefaultAlterationRunner service, reducing the number of code lines and removing unnecessary references. The workflow materialization step has been merged with the find workflow step, and unused namespaces have been dropped.

The documentation for the 'CanStartWorkflowAsync' method in the IWorkflowHost interface has been cleaned up. The superfluous "or not" verbiage has been removed, making it easier to understand the method's function.

Removed the CancellationTokens struct and all its references across the code base. Simplified cancellation handling by using standard CancellationToken only. Also cleaned up redundant usages and unnecessary namespaces across various modules. This simplification better aligns with standard .NET conventions and reduces the code complexity.

The ActivityHandle class has been introduced to consolidate various activity identification parameters such as ActivityId, ActivityNodeId, ActivityInstanceId, and ActivityHash. This makes it easier to track and manage activities by reducing the number of parameters needed for identification. Adoption of ActivityHandle has been implemented across the codebase.

This commit includes the removal of all the AzureContainerApps associated code from the ProtoActor Cluster. The deletion includes multiple files which had housed the AzureContainerApps cluster provider and all its supporting services, util functions, options, contracts, and models. This move might be towards refactoring the structure or removal of unwanted dependencies.

Removed some unused classes and created a distributed execution runtime using distributed locking and persistence. Introduced an interface for workflow clients and implemented two versions, a local one and one using `Proto.Actor`. Made some changes in other modules to add the necessary interfaces and methods. Also, added `DistributedLockingRuntime` module to implement distributed execution.

The WorkflowClient.cs file was removed from the Elsa.Workflows.Runtime project. It held placeholder methods that had not yet been implemented, making it unnecessary in the current codebase.

Added ProtoActor implementation for executing workflow instances. This includes ProtoBuf message definitions, grain interfaces and implementations, and various ProtoActor services. Extended WorkflowHost and related components to provide more execution details in order to better support distributed processing via ProtoActor.

The refactor includes renaming old 'WorkflowParams' classes to 'WorkflowRequest' to better represent their usage. The changes have been made across all the involved modules ensuring that the project maintains consistency. New properties, methods, and class names were updated accordingly.

This update adds the ProtoActor implementation for data mappers and updates the DI configuration accordingly. It also updates the client interfaces for a more streamlined usage, and refactors the WorkflowHost to adapt to these changes. All changes were implemented in accordance with the new bookmark information model.

This commit introduces the capability to create a new workflow instance in the Elsa Workflow Runtime by enhancing existing workflow classes and creating the WorkflowClientFactoryExtensions class, in addition to adding the "IsNewInstance" parameter to multiple workflows and requests. It provides more flexibility in managing workflow instances and aids in building workflow processes that require instantiation of a new workflow.

This commit deletes the Elsa.Runtimes.DistributedLockingRuntime module from the project. Changes include removed code files related to features, services and commands under this module. The Elsa.sln file has been updated to reflect these changes, excluding the removed module from the solution.

The WorkflowClientFactory now accepts a client Type parameter for dynamic client creation. This enables the factory to create different subclasses of IWorkflowClient based on the provided Type. The CreateClient function is updated in the WorkflowClientFactoryExtensions and IWorkflowClientFactory interface, and applied in HttpWorkflowsMiddleware.

A comprehensive change that introduces support for Proto.Actor clustering to Elsa. It includes a redesign of the workflow client invocation model, transitioning the methods from synchronous to asynchronous. Also, modification to the Proto.Actor-based 'WorkflowGrain' was made to handle state recovery and execution processing. The structural enhancements improve scalability and performance capabilities.

Simplified the null-checking in the method SaveSnapshotAsync within WorkflowGrain.cs. The check on _workflowHost and workflowState has been shortened using conditional access operator, improving the code readability.

The codebase has undergone a major refactoring to improve code readability and consistency, with non-essential methods being removed and variable names being optimized for clarity. Package references for Proto.Actor and related packages have been also updated to the latest versions.

The Proto.Cluster.AzureContainerApps package with version 1.6.0 has been included in the Directory.Packages.props file. This addition extends the range of Proto.Cluster packages used in the project.

This commit removes several redundant files related to the Proto.Actor implementation. These files were unnecessary and were cluttering up the codebase. With this removal, the project has become leaner and easier to maintain. It also eliminates potential confusion for future developers working on this project.

This commit introduces a new class, WorkflowMatcher, which represents a contract for finding triggers and bookmarks associated with workflow activities. It also renames and replaces all instances of BookmarkHasher with StimulusHasher to reflect a more accurate function relating to stimulus rather than bookmarks. Other necessary changes were made to ensure consistency with these updates across different classes. It's important to note that WorkflowInbox interface is now marked as obsolete.

… logic

Multiple files updated to introduce a `IWorkflowInvoker` interface, implementation and supporting classes. This simplified how workflows are instantiated and invoked. Consequently, necessary adjustments made across multiple entities and endpoints to account for the updated invocation procedure. Old logic related to counting running workflows removed. Introduced stimulus concept while deprecating non-compliant classes and methods.

The version number used in the branch checking step of the GitHub workflows has been updated. Instead of scanning for the branch containing the patch version 3.1.2, it now scans for the branch that contains version 3.1.3. This change is aligned with the updated product version.

The git grep pattern has been corrected to properly identify tagged versions in the GitHub Actions workflow. The correction ensures that the workflow script fetches the right branches as per the release tag instead of patch.

The grep command used in the 'packages.yml' GitHub workflow was previously looking for the exact 'refs/tags/3.1.3' string. This commit simplifies the command by making it only look for '3.1.3'. This adjustment will streamline the process and potentially prevent issues with branch recognition.

…cript modules

Updated versions of numerous packages in the Directory.Packages.props file to their latest stable releases. This includes updates to Elasticsearch, JavaScript, and MongoDB packages among others. Additionally, refactored parts of the code in the WorkflowInstanceConfiguration and JintJavaScriptEvaluator within the Elasticsearch and JavaScript modules, respectively, to improve index management and script preparation. The WorkflowInstanceStore also saw a minor adjustment.

The existing workflow management has been significantly refactored, introducing the concept of "Workflow Definition Handles". These handles allow for consistent management whether we're dealing with a specific workflow definition, a version of a definition, or more flexible version constraints. This refactor also adjusts how workflow instances are created, now using a more intuitive and detailed "WorkflowInstanceOptions" approach.

Implemented a ResumeBookmarkResult class to handle bookmark resumption results. Methods related to resuming bookmarks have been refactored to return this new class, providing more information such as bookmarks' matched state. Also, some methods were optimized to break the loop early if no bookmarks were found, improving code efficiency.

This commit focuses on enhancements and adjustments to workflow definition and execution. Notable changes include the addition of ExecuteResponse model and new test workflow scenarios. Refactoring has been performed to improve readability and efficiency in various components. It also includes an important fix for the correct application of WorkflowDefinition filters, primarily using both DefinitionId and DefinitionVersionId for more accurate results.

This commit involves changes to functionally reorganize the runtime codebase for improved structure. It also allows for better handling of workflows, particularly through the addition of original bookmarks in the workflow execution context. Removed unnecessary dependencies and ensured more efficient management of bookmarks in the workflow running process. Several method and class names were also updated to better reflect their purpose.

Optimized the constructor of 'WorkflowInvoker' by using 'IServiceScopeFactory' to get instances of required services. Removed the 'OriginalBookmarks' property from 'WorkflowStateExtractor' and 'WorkflowState', a subsequent change included in 'WorkflowGraphBuilder' as well. Reorganized the namespaces in 'Elsa.Workflows.ComponentTests' project. Added 'UseCache' in WorkflowServer configurations.

This update deletes the RunWorkflowParams class within the Runtime Requests of the Elsa.Workflows module. The class was no longer needed, hence the elimination and cleanup in the codebase.

This commit modifies the RunWorkflowParamsMapper in the Elsa.ProtoActor module. It primarily treats the BookmarkId and TriggerActivityId fields to return null if they are empty, boosting the application's robustness against potential null or empty field issues.

In this update, the handling of workflows was refactored to improve efficiency. The 'RunAsync' method now correctly uses 'WorkflowGraph' as a parameter, instead of 'Workflow'. Additionally, null checks for 'bookmarkId' and 'activityHandle.ActivityInstanceId' have been improved to avoid null and empty strings. Finally, when '_workflowInstanceId' is null in the 'WorkflowGrain' class, it is now properly initialized by parsing the cluster identity.

This commit turns on the use of ProtoActor within the Elsa.Server.Web bundle. This switch may affect the system's behavior and performance.

Implemented new features for creating, running, and scheduling workflow instances. The implementation added new files for handling workflow runtime and scheduling features, including creating and running a workflow instance request, a mapper for the request, and handler services. Modified files include updating method calls according to the new requests, updating workflow definitions, and adjustment to method arguments in Hangfire job class.

This commit introduces null checks for workflow instance IDs and correlation IDs in the workflow infrastructure. Previously, the code assumed that the IDs were provided. It now gracefully handles cases where they might be null or empty, preventing possible null reference exceptions and ensuring more robust workflow execution.

Removed unnecessary using statement for Elsa.Workflows.Runtime.Requests in ResumeWorkflowJob.cs. Updated references from DispatchWorkflowInstanceRequest to ScheduleExistingWorkflowInstanceRequest for retrieving ActivityHandle and WorkflowInstanceId.

In this commit, changes were made to the AzureServiceBus module to use Topic definitions for subscriptions. The Subscriptions property in the AzureServiceBusOptions and the Topic property in the SubscriptionDefinition class are marked as obsolete and suggestions to use TopicDefinition.Subscriptions instead have been added. The AzureServiceBus module was also integrated into the web project and configured to use options from the appsettings.json.

Refactored code to use async scopes for improved task management. Also organized service dependencies better by moving service fetching inside methods where they are needed and propagating necessary dependencies through method parameters for cleaner code.

This commit introduces a set of workflow component tests for Azure Service Bus integration. These tests encompass scenarios like message receiving, sending messages with correlation IDS, and sending single messages. In addition, 'SignalResetEvent' test helper was removed, a new test helper 'TriggerSignal' was added, and a Mock ServiceBusClient and ServiceBusAdministrationClient were added to the WorkflowServer fixture. Lastly, the NSubstitute package was added to the test project's dependencies.

Added support for deferred tasks in the workflow execution context. This implementation allows tasks to be deferred and executed right after persistence of bookmarks in the workflow. A new middleware, ExecuteDeferredActivityTasks, is introduced to handle the execution of these deferred tasks.

Refactored the execution of TriggerSignal and SendMessage activities by using context.DeferTask to ensure the activities run asynchronously. Also, made code format modifications and simplifications such as handling ApplicationProperties better in the SendMessage activity, and other minor changes.

The workflow ID generation method has been updated in the WorkflowBuilder. Previously, it was always generated by _identityGenerator. Now, it only gets generated if the definitionId or Id is null or empty, otherwise it uses the existing value. This change brings the ID generation practice in line with how we handle definitionId.

Two new helper classes, DictionaryExtensions and MockServiceBusProcessor, have been added to support mocking Azure service bus in workflow component tests. Also, the tests have been updated to use SignalManager to ensure proper order of execution. The WorkflowServer test fixture has been extensively refactored to create mock instances of service bus senders and processors. Furthermore, some configurations have been commented out and new configurations related to MemoryTriggerStore and MemoryBookmarkStore have been added.

This update improves Elsa Workflows by enabling caching and enhancing correlation in Correlate.cs. It expands functionality by adding new methods that accept various input types and provide more options for activities correlation. Correlation improvements also extend to AzureServiceBusTests, which were updated to test workflow instances by correlation ID. Furthermore, the test workflow received a name change and new correlation mechanics based on Azure messaging.