I4. Implement language improvements for MOSA+

jdomainapp / jda

the root source code project of the JDA framework

MIT License

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I4. Implement language improvements for MOSA+ #40

Open ducmle opened 3 years ago

ducmle commented 3 years ago

@haworker25 @ducmle-fpt Depends on: #39 Paper-2: mdsa: Part 2

MOSA+ = MDSA (micro-domain software architecture) architecture.

[ ] #85
[ ] #82

ducmle commented 2 years ago

@haworker25 (em liệt kê issues hàng ngày lên đây)

ducmle commented 2 years ago

@haworker25 Error running "clean install"

Error: mvn clean install
[ERROR]   The project jda.example:jda-eg-coursemanmsa-servicestmsa:1.0 (/data/projects/jda/examples/courseman/msa/modules/servicestmsa/pom.xml) has 1 error
[ERROR]     Child module /data/projects/jda/examples/courseman/msa/modules/servicestmsa/cmodulemgnt-service of /data/projects/jda/examples/courseman/msa/modules/servicestmsa/pom.xml does not exist

ducmle commented 2 years ago

Java JDK

[x] Use Oracle Java 13.0 or above

ServiceReconfigurer.promote()

[ ] 1: assume service config has been uploaded into the git (used by config-server)
[ ] 1.3.1: initDataSource: find a way to do this automatically at service start up time. (e.g. use a library)
[x] 1.4: promoteCompleted: same as ResponseEntity.ok

ServiceReconfigurerController

[ ] do not use 2 classes, merge into one class

Service Resiliency

[ ] service resiliency

haworker25 commented 2 years ago

Used Oracle Java 13.0 but 2 functions still not work

ducmle commented 2 years ago

Used Oracle Java 13.0 but 2 functions still not work

Very strange because they run on myy machine.

Please finish the code of promote() and let me try on my machine.

ducmle commented 2 years ago

@haworker25

Service Resiliency

Implement 3 resiliency patterns (bulkhead (BH), circuit breaker (CB), fallback (FB)) into the AcademicAdministration service

Design (abstract): ControllerTk.invokeService:

BH: use thread pool (e.g. Executors) to execute the service invocation on a thread
CB: check for service invocation timeout. Flag the service instance as bad if timeout occurs without any result
FB: use the FB service instance when CB occurs. Look up the alternative service instance and invoke ControllerTk.invokeService again to repeat the process.
- this recursive invocation is necessary to ensure that resiliency is applied to every service invocation

Discussion

How to unregister a service instance from Eureka server:
- using InstanceRegistry.cancel of the Eureka server