robberphex / gradle-example

an example to show dependency from platform and exclusion

1. introduce dependencyManagement module, add constraints.

   val sentinelVersion = "1.8.6"
   
   dependencies {
       constraints {
           api("com.alibaba.csp:sentinel-spring-webmvc-adapter:$sentinelVersion")
           api("com.alibaba.csp:sentinel-core:$sentinelVersion")
       }
   }

2. add dependency in app module, with exclusion, without version.

   dependencies {
       implementation(enforcedPlatform(project(":dependencyManagement")))
       implementation("com.alibaba.csp:sentinel-spring-webmvc-adapter") {
           exclude("com.alibaba.csp", "sentinel-core")
       }
   }

3. verify

   $ ./gradlew -q :app:dependencies
   
   ------------------------------------------------------------
   Project ':app'
   ------------------------------------------------------------
   
   runtimeClasspath - Runtime classpath of source set 'main'.
   +--- project :dependencyManagement
   |    \--- com.alibaba.csp:sentinel-spring-webmvc-adapter:1.8.6 (c)
   \--- com.alibaba.csp:sentinel-spring-webmvc-adapter -> 1.8.6
   $ ./gradlew -q run
   Hello, world!
   load adapter success!   com.alibaba.csp.sentinel.adapter.spring.webmvc.callback.UrlCleaner
   load core failed!       java.lang.ClassNotFoundException: com.alibaba.csp.sentinel.Env

reference

1. https://docs.gradle.org/current/userguide/platforms.html#sub:using-platform-to-control-transitive-deps