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* feat(errors): Add specialized timeout error types for maintenance scenarios - Added `SocketTimeoutDuringMaintananceError`, a subclass of `TimeoutError`, to handle socket timeouts during maintenance. - Added `CommandTimeoutDuringMaintenanceError`, another subclass of `TimeoutError`, to address command write timeouts during maintenance. * feat(linked-list): Add EmptyAwareSinglyLinkedList and enhance DoublyLinkedList functionality - Introduced `EmptyAwareSinglyLinkedList`, a subclass of `SinglyLinkedList` that emits an `empty` event when the list becomes empty due to `reset`, `shift`, or `remove` operations. - Added `nodes()` iterator method to `DoublyLinkedList` for iterating over nodes directly. - Enhanced unit tests for `DoublyLinkedList` and `SinglyLinkedList` to cover edge cases and new functionality. - Added comprehensive tests for `EmptyAwareSinglyLinkedList` to validate `empty` event emission under various scenarios. - Improved code formatting and consistency. * refactor(commands-queue): Improve push notification handling - Replaced `setInvalidateCallback` with a more flexible `addPushHandler` method, allowing multiple handlers for push notifications. - Introduced the `PushHandler` type to standardize push notification processing. - Refactored `RedisCommandsQueue` to use a `#pushHandlers` array, enabling dynamic and modular handling of push notifications. - Updated `RedisClient` to leverage the new handler mechanism for `invalidate` push notifications, simplifying and decoupling logic. * feat(commands-queue): Add method to wait for in-flight commands to complete - Introduced `waitForInflightCommandsToComplete` method to asynchronously wait for all in-flight commands to finish processing. - Utilized the `empty` event from `#waitingForReply` to signal when all commands have been completed. * feat(commands-queue): Introduce maintenance mode support for commands-queue - Added `#maintenanceCommandTimeout` and `setMaintenanceCommandTimeout` method to dynamically adjust command timeouts during maintenance * refator(client): Extract socket event listener setup into helper method * refactor(socket): Add maintenance mode support and dynamic timeout handling - Added `#maintenanceTimeout` and `setMaintenanceTimeout` method to dynamically adjust socket timeouts during maintenance. * feat(client): Add Redis Enterprise maintenance configuration options - Added `maintPushNotifications` option to control how the client handles Redis Enterprise maintenance push notifications (`disabled`, `enabled`, `au to`). - Added `maintMovingEndpointType` option to specify the endpoint type for reconnecting during a MOVING notification (`auto`, `internal-ip`, `external-ip`, etc.). - Added `maintRelaxedCommandTimeout` option to define a relaxed timeout for commands during maintenance. - Added `maintRelaxedSocketTimeout` option to define a relaxed timeout for the socket during maintenance. - Enforced RESP3 requirement for maintenance-related features (`maintPushNotifications`). * feat(client): Add socket helpers and pause mechanism - Introduced `#paused` flag with corresponding `_pause` and `_unpause` methods to temporarily halt writing commands to the socket during maintenance windows. - Updated `#write` method to respect the `#paused` flag, preventing new commands from being written during maintenance. - Added `_ejectSocket` method to safely detach from and return the current socket - Added `_insertSocket` method to receive and start using a new socket * feat(client): Add Redis Enterprise maintenance handling capabilities - Introduced `EnterpriseMaintenanceManager` to manage Redis Enterprise maintenance events and push notifications. - Integrated `EnterpriseMaintenanceManager` into `RedisClient` to handle maintenance push notifications and manage socket transitions. - Implemented graceful handling of MOVING, MIGRATING, and FAILOVER push notifications, including socket replacement and timeout adjustments. * test: add E2E test infrastructure for Redis maintenance scenarios * test: add E2E tests for Redis Enterprise maintenance timeout handling (#3) * test: add connection handoff test --------- Co-authored-by: Pavel Pashov <pavel.pashov@redis.com> Co-authored-by: Pavel Pashov <60297174+PavelPashov@users.noreply.github.com>