EngineConnManager Design
- EngineConnManager architecture design
  - ECM architecture
  - Introduction to the second-level module

EngineConnManager Design

EngineConnManager architecture design

EngineConnManager (ECM): EngineConn’s manager, provides engine lifecycle management, and reports load information and its own health status to RM.

ECM architecture

Introduction to the second-level module

Linkis-engineconn-linux-launch

The engine launcher, whose core class is LinuxProcessEngineConnLauch, is used to provide instructions for executing commands.

Linkis-engineconn-manager-core

The core module of ECM includes the top-level interface of ECM health report and EngineConn health report function, defines the relevant indicators of ECM service, and the core method of constructing EngineConn process.

Core top-level interface/class	Core function
EngineConn	Defines the properties of EngineConn, including methods and parameters
EngineConnLaunch	Define the start method and stop method of EngineConn
ECMEvent	ECM related events are defined
ECMEventListener	Defined ECM related event listeners
ECMEventListenerBus	Defines the listener bus of ECM
ECMMetrics	Defines the indicator information of ECM
ECMHealthReport	Defines the health report information of ECM
NodeHealthReport	Defines the health report information of the node

Linkis-engineconn-manager-server

The server side of ECM defines top-level interfaces and implementation classes such as ECM health information processing service, ECM indicator information processing service, ECM registration service, EngineConn start service, EngineConn stop service, EngineConn callback service, etc., which are mainly used for ECM to itself and EngineConn Life cycle management, health information reporting, heartbeat sending, etc. Core Service and Features module are as follows:

Core service	Core function
EngineConnLaunchService	Contains core methods for generating EngineConn and starting the process
BmlResourceLocallizationService	Used to download BML engine related resources and generate localized file directory
ECMHealthService	Report your own healthy heartbeat to AM regularly
ECMMetricsService	Report your own indicator status to AM regularly
EngineConnKillSerivce	Provides related functions to stop the engine
EngineConnListService	Provide caching and management engine related functions
EngineConnCallBackService	Provide the function of the callback engine