Parametrise a Runnable object at runtime

Question

I have a Runnable task (doSomething) that I need to parametrise depending on who calls run().

    Class SomeClass {
    
        Public void foo(ScheduledExecutorService execService, ){
            ...
            Runnable doSomething = () -> {
                /*Code that I DON’T want to duplicate*/
                ...
                /* small piece of code that I need to parametrise */
            };
            ...
        
            // after someDelayInSeconds doSomething.run() will be called
            execService.schedule(doSomething, someDelayInSeconds, TimeUnit.SECONDS); 

            // this might or might not call doSomething.run()
            bar(doSomething); 
    
            ...
        
        }

        private void bar(Runnable doSomething){

           ...
           if(/* some conditions are met */)
              doSomething.run();
           ...
        }
    }

So far the only alternative I have is to transform the anonymous class into a named class and create two objects with the required parameters.

Would there be a more elegant way?

Answer 1

I'm not sure, if this is what you are looking for:

  // provide config 
  Map<String, String> config = new HashMap<>();
  config.put( "someKey", "someValue" );

  Consumer<Map<String, String>> consumer = cfg -> {
     Runnable doSth = () -> {
        if ( cfg.get( "someKey" ).equals( "someValue" ) ) {

        }
     };
     doSth.run();
  };

  // apply different configurations depending on your needs
  consumer.accept( config );