EngineConn architecture design

EngineConn: Engine connector, a module that provides functions such as unified configuration management, context service, physical library, data source management, micro service management, and historical task query for other micro service modules.

EngineConn architecture diagram

Introduction to the second-level module:

linkis-computation-engineconn interactive engine connector

The ability to provide interactive computing tasks.

Core class	Core function
EngineConnTask	Defines the interactive computing tasks submitted to EngineConn
ComputationExecutor	Defined interactive Executor, with interactive capabilities such as status query and task kill.
TaskExecutionService	Provides management functions for interactive computing tasks

linkis-engineconn-common engine connector common module

Define the most basic entity classes and interfaces in the engine connector. EngineConn is used to create a connection session Session for the underlying computing storage engine, which contains the session information between the engine and the specific cluster, and is the client that communicates with the specific engine.

Core Service	Core function
EngineCreationContext	Contains the context information of EngineConn during startup
EngineConn	Contains the specific information of EngineConn, such as type, specific connection information with layer computing storage engine, etc.
EngineExecution	Provide Executor creation logic
EngineConnHook	Define the operations before and after each phase of engine startup

The core logic of linkis-engineconn-core engine connector

Defines the interfaces involved in the core logic of EngineConn.

Core class	Core function
EngineConnManager	Provide related interfaces for creating and obtaining EngineConn
ExecutorManager	Provide related interfaces for creating and obtaining Executor
ShutdownHook	Define the operation of the engine shutdown phase

linkis-engineconn-launch engine connector startup module

Defines the logic of how to start EngineConn.

Core class	core function
EngineConnServer	EngineConn microservice startup class

The core logic of the linkis-executor-core executor

Defines the core classes related to the actuator. The executor is a real computing scene executor, responsible for submitting user code to EngineConn.

Core class	Core function
Executor	It is the actual computational logic execution unit and provides a top-level abstraction of the various capabilities of the engine.
EngineConnAsyncEvent	Defines EngineConn-related asynchronous events
EngineConnSyncEvent	Defines EngineConn-related synchronization events
EngineConnAsyncListener	Defines EngineConn related asynchronous event listener
EngineConnSyncListener	Defines EngineConn related synchronization event listener
EngineConnAsyncListenerBus	Defines the listener bus for EngineConn asynchronous events
EngineConnSyncListenerBus	Defines the listener bus for EngineConn synchronization events
ExecutorListenerBusContext	Defines the context of the EngineConn event listener
LabelService	Provide label reporting function
ManagerService	Provides the function of information transfer with LinkisManager

linkis-callback-service callback logic

Core Class	Core Function
EngineConnCallback	Define EngineConn's callback logic

linkis-accessible-executor can be accessed executor

Executor that can be accessed. You can interact with it through RPC requests to get its status, load, concurrency and other basic indicators Metrics data.

Core Class	Core Function
LogCache	Provide log cache function
AccessibleExecutor	The Executor that can be accessed can interact with it through RPC requests.
NodeHealthyInfoManager	Manage Executor's Health Information
NodeHeartbeatMsgManager	Manage the heartbeat information of Executor
NodeOverLoadInfoManager	Manage Executor load information
Listener	Provides events related to Executor and the corresponding listener definition
EngineConnTimedLock	Define Executor level lock
AccessibleService	Provides the start-stop and status acquisition functions of Executor
ExecutorHeartbeatService	Provides heartbeat related functions of Executor
LockService	Provide lock management function
LogService	Provide log management functions