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Releases: TaskOverflow/server

RELEASE 1.0

15 Mar 21:10
@begarco begarco
FINAL
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TaskOverflow

Grails project at ISIMA by Benoît Garçon

Structure of the project

You can find all this elements in this project:

  • The Grails project in the common folders with sources, tests, etc.
  • The documentation of the source is in documentation folder
  • The specification and mockups are in document folder.

Run the application

By default the server will be reachable on http://localhost:8080.

grails war
cd build/libs       # see https://github.com/grails/grails-core/issues/9302
java "-Dgrails.env=dev" -jar .\TaskOverflow-0.1.war

Stateless application

This application is totally stateless.

Authentification mechanism

This application is secured through spring-security-rest.

Feature Flipping

The Feature Flipping is implemented: it use the configuration server of this project. To test the feature flipping on a feature, you just need to switch between 'ok' and 'ko' in the corresponding file in conf/data/. Warning: it is important to run the configuration server from root (like it is said in the corresponding README). Every five seconds the client ping each features to know if the feature is activated.

Health check

The complete Health Check is available at http://localhost:8080/health.
Some simplified Health Check are available for each features (user, badge, tag, question) at http://localhost:8080/featureName/healthcheck, it is used in Circuit Breaker feature.

Circuit Breaker

The Circuit Breaker is implemented with the help of previously described feature healthcheck. Every five seconds the client ping each features to know if they respond 200 or an error. In the opened mode the circuit waits 20 seconds. If you want to play with the circuit breaker, you have to launch the server with grails run-app and modify the code returned by healthcheck() action of the desired controller. Or you can just break the server.

Graceful Degradation

If there is a problem, some features are simply deleted from the UI (badge, tag), other features are replaced by new third party service : when user feature is down a list of random people is displayed, when question feature is down random gif of cats are displayed instead.

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