hystrix.java

public class CommandHelloWorld extends HystrixCommand<String> {

    private final String name;

    public CommandHelloWorld(String name) {
        super(HystrixCommandGroupKey.Factory.asKey("ExampleGroup"));
        this.name = name;
    }

    @Override
    protected String run() {
        // a real example would do work like a network call here
        return "Hello " + name + "!";
    }
    
    @Override
    protected String getFallback() {
        return "Hello Failure " + name + "!";
    }
}

String s = new CommandHelloWorld("World").execute();
System.out.println(s);

Future<String> fs = new CommandHelloWorld("World").queue();
System.out.println(fs.get());