title: Send out 1 email after all Oozie jobs finish
body: <p>So far, I've been using oozie email actions to send out email enriched with some information, when submitting job in our hadoop cluster :</p>
  
  <pre><code>&lt;workflow-app name="[WF-DEF-NAME]" xmlns="uri:oozie:workflow:0.1"&gt;
      ...
      &lt;action name="[NODE-NAME]"&gt;
          &lt;email xmlns="uri:oozie:email-action:0.2"&gt;
              &lt;to&gt;[COMMA-SEPARATED-TO-ADDRESSES]&lt;/to&gt;
              &lt;cc&gt;[COMMA-SEPARATED-CC-ADDRESSES]&lt;/cc&gt; &lt;!-- cc is optional --&gt;
              &lt;subject&gt;[SUBJECT]&lt;/subject&gt;
              &lt;body&gt;[BODY]&lt;/body&gt;
              &lt;content_type&gt;[CONTENT-TYPE]&lt;/content_type&gt; &lt;!-- content_type is optional --&gt;
              &lt;attachment&gt;[COMMA-SEPARATED-HDFS-FILE-PATHS]&lt;/attachment&gt; &lt;!-- attachment is optional --&gt;
          &lt;/email&gt;
          &lt;ok to="[NODE-NAME]"/&gt;
          &lt;error to="[NODE-NAME]"/&gt;
      &lt;/action&gt;
      ...
  &lt;/workflow-app&gt;
  </code></pre>
  
  <p>This is for sending out emails after each submitted workflows.
  Let's say i have 560 jobs running and instead of receiving 560 emails, i would like to receive only 1 single email that will contain a sum up of what happened in that specific business day ( successes, failures etc..)</p>
  
  <p>I am not finding any solution on how to implement this.
  Has anyone already tried something like that, and if yes, could you please point me to some possible approach to this idea?
  Please comment out if what i am trying to achieve is not clear enough, 
  Thanks</p>