* Fix outbound connection processing logic
Corrected `completedActivityExcecutedByBackwardConnection` to `completedActivityExecutedByBackwardConnection`. Improved flowgraph outbound connection handling by separating visitation and processing logic, ensuring skipped connections are propagated consistently.
* Add tests for decision implicit join workflows
Introduce new integration tests to verify workflows with implicit joins on both decision outcomes. Added corresponding workflow definitions and updated the test project to ensure compatibility. Refactored connection visit logic for better readability and maintainability.
* Add Key to Kafka ProduceMessage activity
Deleted unnecessary Consumer and Producer workflow classes and the OrderReceived message class to clean up code. Refactored Kafka producer interface and implementation to include message keys for improved message handling. Updated configuration to enable Kafka and removed unused service registrations.
* Add Kafka factory classes and type alias registry
Introduce GenericConsumerFactory and GenericProducerFactory for handling Kafka consumer and producer creation. Implement a TypeAliasRegistry to manage type aliases, enabling cleaner configuration through aliases. Update the OrderReceived message class and ensure better integration with the server web program via these new components.
* Handle empty topics and predicates in Kafka worker.
Ensure the Kafka consumer unsubscribes when no topics are available to subscribe to. Additionally, add a check to handle empty string values for predicates, allowing workflow triggers to proceed in this scenario.
* Disable Kafka usage in Elsa Server Web configuration
Kafka has been disabled in the current configuration by setting the useKafka constant to false. This change might be intended to switch to a different messaging system or to simplify the current setup by removing unnecessary services. Ensure that any dependencies on Kafka are handled elsewhere in the application.
Enhanced error handling in Worker.cs to catch consume exceptions and log warnings. Added logging to TriggerWorkflows.cs for better traceability and fixed issues with expression evaluation. Also updated predicate in ConsumerWorkflow.cs and set CanStartWorkflow to true.
* Enable Kafka Worker Factory and Refactor Worker Implementation
Introduce a flexible worker factory mechanism allowing custom worker creation with DefaultWorkerFactory as the initial implementation. Enhance Worker class to be generic, remove manual consumer configuration, and streamline message processing logic, improving code maintainability and extensibility.
* Refactor Kafka configuration properties
Renamed configuration properties in Consumer and Producer entities. Updated references in the codebase to use the new `Config` property instead of `ConsumerConfig` and `BootstrapServers`. Adjusted appsettings.json to match the new configuration schema.
* Add Kafka producer and consumer implementation
Implemented classes and interfaces to handle Kafka producers and consumers, including `ProducerProxy`, `ConsumerProxy`, and related context classes and factories. Refactored existing code to utilize these new implementations, replacing worker terminology with consumer and addressing context-specific fields.
* Remove redundant code in DefaultConsumerFactory and SendMessage
Removed commented-out unused return statement in DefaultConsumerFactory. Also eliminated explicit producer.Dispose() call in SendMessage, as the 'using' statement already handles resource cleanup.
* Add ExpandoObject producer and consumer factories
Replaced DefaultSerializers with new JsonSerializer and JsonDeserializer classes. Introduced ExpandoObjectProducerFactory and ExpandoObjectConsumerFactory to handle dynamic types. Updated workflow and configuration to use the new factories.
* Refactor bookmark processing and manage worker subscriptions
Refactored bookmark processing logic to utilize extension methods. Optimized worker subscriptions by centralizing topic subscription management and added logging for subscribed topics. This improves maintainability and clarity of the codebase.
* Refactor worker creation to use ActivatorUtilities
Updated WorkerManager to instantiate workers using ActivatorUtilities for better dependency injection support. This enhances code readability and maintains consistency with the service provider approach used throughout the codebase.
* Add Kafka module with integration and example setup
Introduced the Kafka module providing consumer integration and activities into the project. This includes new classes for consumer handling, configuration, and activities. An example setup using Docker Compose is also added to facilitate development and testing.
* Refactor KafkaTransportMessage to inline Timestamp namespace
Simplify the namespace usage for the Timestamp type within the KafkaTransportMessage record. This change eliminates the need for a separate using directive for Timestamp, enhancing code readability and maintainability.
* Add support for handling Kafka transport messages
This commit introduces the capability to handle and trigger workflows based on Kafka transport messages. It adds a new handler, notifications, and updates the message stimulus to include correlating fields. Additionally, the Kafka consumers are now managed more modularly with updated startup tasks and mediator integration.
* Enable Kafka integration and fix Kafka options naming
Added support for Kafka integration in Elsa.Server.Web by setting up Kafka configurations in appsettings.json and updating Program.cs. Also, renamed `ConsumerConfigs` to `ConsumerDefinitions` in Kafka options for clarity.
* Add consumer definition enumeration and dropdown support
Introduced `IConsumerDefinitionEnumerator` for managing consumer definitions across providers and implemented in `ConsumerDefinitionEnumerator` class. Enhanced `KafkaFeature` to register these services and updated the `MessageReceived` activity to use a dropdown UI hint for consuming definitions. Improved `StartConsumersTask` by refactoring consumer definition retrieval logic.
* Add SendMessage activity and refine Kafka messaging
Introduce a new SendMessage activity for Kafka, enabling message publishing to specific topics. Refine KafkaTransportMessage model by removing headers and timestamp fields. Adjust the StimulusSender logic to streamline the bookmark queuing process and fix key-value pairing in dropdown options. Update appsettings for corrected Kafka bootstrap server and topic configurations.
* Add producer and topic management support
Introduced interfaces and implementations for managing producer and topic definitions along with their respective enumerators and list providers. Updated `SendMessage` activity to include producer selection and refactored consumer definition providers for better consistency.
* Refactor Kafka configuration property names
Renamed Kafka configuration properties for better consistency and readability across the codebase. Updated property names from `ProducerDefinitions` to `Producers`, `ConsumerDefinitions` to `Consumers`, and `TopicDefinitions` to `Topics`. Added missing input attribute in `SendMessage.cs` and registered additional handlers in `KafkaFeature.cs`.
* Add custom serializers for Kafka message handling
Introduced `DefaultSerializers` class for custom serialization and deserialization of Kafka messages. Updated `MessageReceived` and `SendMessage` activities to use these custom serializers, and modified `KafkaOptions` to include them.
* Fix ExpandoObject serialization method parameter
Changed the serialization type from `ExpandoObject` to the actual type of the object to ensure proper serialization. This ensures that derived types are correctly handled during the serialization process.
* Add Producer and Consumer workflows for Kafka
Introduced two new workflows: `ProducerWorkflow` and `ConsumerWorkflow` for handling Kafka messages. Updated `DefaultSerializers` to use camelCase property naming and modified `appsettings.json` to include `topic-2` and format entries.
* Add JSON serialization to log output in ConsumerWorkflow
This change enhances the log output by serializing messages to JSON format before writing them. The addition of System.Text.Json ensures that the message content is presented in a structured and standardized format in logs.
* Add correlation strategies and update Kafka features
Implemented HeaderCorrelationStrategy and NullCorrelationStrategy, and updated KafkaFeature to support customizable correlation strategies. Added correlation ID handling to Kafka transport messages and updated config and handlers accordingly.
* Add tenant accessor to ConsumerDefinitionWorkflowContextProvider
Integrated ITenantAccessor to the provider to support tenant-specific context loading. Updated the constructor and LoadAsync method to retrieve the tenant information and use it for context-specific operations.
* Switch to MySQL and disable Kafka
This commit changes the SQL database provider from SQLite to MySQL and disables Kafka use. It also includes necessary adjustments such as adding MySQL handling in configuration and connection setups, updating `docker-compose` to include MySQL services, and referencing MySQL projects in the `.csproj` file.
* Add UI property handlers to multiple features
This commit introduces various UI property handlers across several features such as Python, JavaScript, CSharp, and Workflow features to enhance user interface property handling. It also updates the property UI handler resolution logic to better manage cases where providers are not available. Furthermore, adjustments were made in the server configuration to switch database providers and enable Kafka.
* Refactor property UI handler retrieval logic
Modified the logic to fetch property UI handlers by preloading them into a list and then filtering. This change improves readability and potentially performance by reducing repetitive service provider calls.
* Incremental work on Kafka workers and predicate evaluation
* Merge BookmarkInvoker with BookmarkResumer
* Register IWorkerManager
* Change lifetime scope of WorkerManager to Singleton
* **Introduce topic subscription handling for Kafka workers**
Added `IWorkerTopicSubscriber` interface and its implementation for managing topic subscriptions. Enhanced workers to bind triggers and bookmarks dynamically based on existing data. Updated several classes and methods to support topic-based subscriptions and headers.
* Refactor trigger matching logic.
Extract trigger matching conditions into `IsMatchAsync` method for reuse. This enhances code maintainability and readability by reducing redundancy. The new `GetTopic` helper method isolates the topic retrieval logic.
* Add Name property to MassTransitActivityTypeProvider
This commit inserts the Name property in the returned object within the MassTransitActivityTypeProvider class. It ensures that the typeName is included, providing a clearer definition of the activity type.
* Add handling for deleted bookmarks and refactor bookmark removal
Added a new event handler for `BookmarksDeleted` to ensure removed bookmarks are processed correctly. Refactored the bookmark removal logic into a helper method to reduce code duplication and streamline the workflow.
* Switch to asynchronous bookmark queue processing
Refactored the `TriggerWorkflows` handler to use `IBookmarkQueue` instead of directly invoking the `IBookmarkResumer`. This change aims to improve scalability by queueing bookmark resumption requests, enabling better load distribution and async processing. Added necessary helpers and configuration options to support this functionality.
* Remove unused IBookmarkResumer dependency
Simplify the constructor by removing the unused IBookmarkResumer dependency. This cleanup reduces potential confusion and improves code maintainability without impacting functionality.
* Add support for local message processing
Introduced an `IsLocal` property to `MessageReceivedStimulus` for determining if the message event is local to a specific workflow instance. Updated `BookmarkBinding` and related handler methods to utilize `CorrelationId` for local event matching. Removed unused `CorrelatingFields` from `MessageReceived` activity.
* Add nullability checks to IWorker retrieval methods
Updated `GetWorker` methods to return nullable `IWorker` to handle cases where a worker might not exist. Modified code to include null checks and conditional operations to prevent potential null reference exceptions when accessing worker methods.
* Add filtering based on activity type name for triggers and bookmarks
This commit introduces filtering for triggers and bookmarks based on the `MessageReceived` activity type name. It also adds an option to mark messages as local in the `SendMessage` activity, where local messages are delivered to the current workflow instance only. These changes help enhance the management and targeted delivery of messages within the workflow framework.
* Add new Kafka topics and clean up producers config
New topics "topic-3" and "topic-4" were added to the Kafka settings. Unused topic references were removed from the producers configuration to simplify and improve clarity.
* Add predicate to KafkaConsumerActivity in ConsumerWorkflow
Introduced a predicate to the KafkaConsumerActivity using JavaScript expressions to filter messages based on OrderId. This ensures only relevant messages are processed in the workflow.
Sipke Schoorstra