如何将参数传递给无法在 Spring 引导中自动装配的 @Component class

Question

I am building a desktop application using JavaFx and Spring Boot and I am stuck at some problem

I have @Component class Translator which extends Task<String> and makes an api call to google translation api and I want to pass an autowired bean class and some string parameters such as source and target language to the Translator constructor.

@Component
class Translator extends Task<String>{

   private TextPreprocessor textPreprocessor;
   private Stirng strUrl;
   private String from;
   private String to;
   private String text;

   public Translator(@Value("${translator.api.url}" strUrl,TextPreprocessor textPreprocessor)){
      this.strUrl=strUrl;
      this.textPreprocessor=textPreprocessor;
   }

   protected String call() throws Exception{
    //some code 
   }


}
@Component
class TextPreprocessor{
 //some code
}

So my problem is I need to pass parameters from , to and text to Translator constructor but I can't do that here because these varibles can't be autowired. How can I fix this?

Answer 1

According to your requirements the class Translator should not belong to Spring-context and it should not be a spring-bean . Instead it seems that this class should be instantiated manually by you in the code each time you need it so that you can pass dynamically the fields from , to , text .

In the class where you will manually instantiate Translator instances, you could have autowired strUrl and textPreprocessor as fields, so that they are always available for you to pass in the new instance of Translator that you will create.

There is 1 case where I would see it as a spring-bean and this would be if you moved from , to , text from been fields of this class into been parameters of method call . This way you could have Translator as a singleton retrieved from Spring-context and you could use dynamic values for from , to , text any time you would like to invoke call method.

The whole picture of your question seems like a design problem.