title: aws swf - get workflow execution id from within the workflow
body: <p>I am using Amazon SWF service to automate some recurring tasks. </p>
  
  <p>I am trying to use <code>signals</code> to execute some commands on remote machines. After the commands are finished executing, I'd like to send a signal back to the workflow to indicate success or failure.</p>
  
  <p>The question is how can I find the <code>workflow execution id</code> programmatically? This is required for the remote machines to send a <code>signal</code>.</p>
  
  <p>Thanks</p>