code: public void signalReady(String resourceName) {
          Preconditions.checkArgument(resourceName != null && !resourceName.isEmpty());
          Map<String, String> hostTags = this.ec2Context.getInstanceTags();
          this.signalReady(hostTags.get(TAG_CLOUDFORMATION_STACK_NAME), resourceName);
      }
docs: signal success to the current CloudFormation stack.<br>
  <br>
  Needed AWS actions:
  <ul>
  <li>ec2:DescribeInstances</li>
  <li>cloudformation:SignalResource</li>
  </ul>
  
  @param resourceName the resource to signal