@Retention(value = RUNTIME)@Target(value = FIELD)@Documented() 
public @interface CordaInject

                    

The CordaInject annotation should be used within Flows to inject Corda's platform services.

The annotation is placed onto a Flow's fields/properties and not on constructor parameters.

Example usage:

• Kotlin:

  
  class MyFlow : ClientStartableFlow {
  
      
      lateinit var flowEngine: FlowEngine
  
      
      lateinit var flowMessaging: FlowMessaging
  
      
      override fun call(requestBody: RestRequestBody): String {
          ...
      }
  }
  

• Java:

  
  class MyFlow implements ClientStartableFlow {
  
      
      public FlowEngine flowEngine;
  
      
      public FlowMessaging flowMessaging;
  
      
      
      public String call(RestRequestBody requestBody) {
          ...
      }
  }
  

The properties annotated with CordaInject can be public or private as the reflection that sets them can bypass their visibility modifiers. Making a Flow's properties public, internal or package private is convenient for unit testing and does not affect the Flow's runtime behaviour.

The injected properties cannot be accessed within a Flow's constructor and should only be used from within a Flow's call method or subsequently executed code.