private void loadJobTypes() {
    Document document = Utils.loadXMLDoc(JOB_TYPES_CONF);
    JobTypeConfiguration conf = new JobTypeConfiguration(document.getDocumentElement());
    _appTypeToJobTypes = conf.getAppTypeToJobTypeList();
  }
Load all the job types configured in JobTypeConf.xml
app/com/linkedin/drelephant/ElephantContext.java