Fill variables in redisson.yml with Spring Boot values.

Is your feature request related to a problem? Please describe.

We are using redisson-spring-boot-starter. We were hoping that we could configure Redisson with a redisson.yml, but also configure more dynamic properties from our application.yml.

# application.yml
spring:
  redis:
    host: ${REDIS_HOSTNAME}
    redisson: 
      file: classpath:redisson.yaml

When we run in a different environment we can overwrite the Redis hostname by setting an environment variable. With Spring Boot profiles (for example “local”), we could have an application-local.yml that contains the following:

# application-local.yml
spring:
  redis:
    host: localhost

Or set the placeholder itself:

# application-local.yml
REDIS_HOSTNAME: localhost

That way we would be able to have different configurations for our local run configuration compared to what we use in our production systems. Detailed properties for Redisson (described in redisson.yml) are the same for all environment, while things like the host, port or ssl properties can change depending on the environment where the application is running.

Describe the solution you’d like

If the merging of application.yml(or application-local.yml) with redisson.yml is not possible, can we then maybe have some feature where we fill variables with Spring Boot values. That way the redisson.yml would be able to look like:

# redisson.yml
singleServerConfig:
  idleConnectionTimeout: 10000
  connectTimeout: 10000
  timeout: 3000
  retryAttempts: 3
  retryInterval: 1500
  subscriptionsPerConnection: 5
  address: "redis://${REDIS_HOSTNAME}:6379"
  subscriptionConnectionMinimumIdleSize: 1
  subscriptionConnectionPoolSize: 50
  connectionMinimumIdleSize: 10
  connectionPoolSize: 64
  dnsMonitoringInterval: 5000

In such a way, we would be able to create an application-local.yml that looks like this:

# application-local.yml
REDIS_HOSTNAME: localhost

With Spring Boot values I mean the values described by externalized configuration here. That way there are many ways to inject variables into the configuration of Redisson.

Describe alternatives you’ve considered

We currently are using the following as an application.yml:

# application.yml
spring:
  redis:
    redisson:
      config: |
        singleServerConfig:
          idleConnectionTimeout: 10000
          connectTimeout: 10000
          timeout: 3000
          retryAttempts: 3
          retryInterval: 1500
          subscriptionsPerConnection: 5
          address: "redis://${ELASTICACHE_URL}:6379"
          subscriptionConnectionMinimumIdleSize: 1
          subscriptionConnectionPoolSize: 50
          connectionMinimumIdleSize: 10
          connectionPoolSize: 64
          dnsMonitoringInterval: 5000

This works for us but puts a lot of detail for a specific dependency in the application.yml. These fields are never changed. The values are prone to mistakes.

[mrniko]

@Blockost

I’m ready to consider any contribution.

[Blockost]

Any news on this @mrniko ? It’s been quite some time now since this feature request has been submitted but it does not seem to be implemented yet right ? I’m very interested in this !