Java Hello World Workflow Implementation

public interface HelloWorkflow {
    @WorkflowMethod(executionStartToCloseTimeoutSeconds = 300)
    String getGreeting(String name);
}

package com.tutorial;

import com.uber.cadence.workflow.Workflow;

import java.time.Duration;

public class HelloWorkflowImpl implements HelloWorkflow {
    @Override
    public String getGreeting(String name) {
        Workflow.sleep(Duration.ofMinutes(1));
        return "Hello " + name + "!";
    }
}

package com.tutorial;

import com.uber.cadence.worker.Worker;

public class Main {

    public static void main(String[] args) {
        Worker.Factory f = new Worker.Factory("samples-domain");
        Worker w = f.newWorker("hello");
        w.registerWorkflowImplementationTypes(HelloWorkflowImpl.class);
        f.start();
    }
}