I have developed a microservice using Spring Boot. This service is fetching the properties using Spring cloud config server. This microservice accepts version in the header and based on version , it executes the appropriate function. In my github repo , I have 2 branches , 1 for each version. The service usually sends the below information to config server to fetch the properties -
application-name + profile + label
Is there a way to have a placeholder in place of label in my .yml file? I want the label to be set to v1 dynamically , if I see v1 in the header else v2.
EDIT:
I see references to placeholder in this documentation (http://cloud.spring.io/spring-cloud-config/spring-cloud-config.html) under section "Placeholders in Git URI", however I am not sure how values can be substituted dynamically from incoming request
spring-cloud-config-server makes several REST API available, allowing to query directly for a property file:
$ hostname:port/{label}/{name}-{profiles}.properties]
You can dynamically use any label of your choice, as long as it matches an existing label on git.
For instance, to retrieve application.properties, labeled v1 in git:
$ http://${hostname}:${port}/v1/application.properties
Config-server REST API:
I tried a sample spring-cloud-server project with a property file on a git. I applied the git tags v1 and v2 with different values in the file for each label (I used the profile remote):
label v1:
http://localhost:8888/v1/application-remote.properties
> testproperty: remotevalue-v1
label v2:
http://localhost:8888/v2/application-remote.properties
> testproperty: remotevalue-v2
no label:
http://localhost:8888/application-remote.properties
> testproperty: remotevalue-master
Java code
I did not try it, but I suppose you could also use cloud-config-server's java API (injecting and calling the controller directly instead of doing an http request):
@Autowired
EnvironmentController environmentController;
...
Environment labelled = environmentController.labelled("application", "remote", "v1");
Map<?, ?> keyValues = labelled.getPropertySources().get(0).getSource();