How to use

extractDomainNameFromFQDN

method

in

org.apache.slider.common.tools.SliderUtils

 private String getSubjectDN(String hostname, String containerId,
               String appName) {
  return String.format("/CN=%s%s%s",
             SliderUtils.extractDomainNameFromFQDN(hostname),
             containerId != null ? "/OU=" + containerId : "",
             appName != null ? "/OU=" + appName : "");
 }
}

 @Test
 public void testExtractDomainNameFromFQDN() {
  String fqdn = "azure-cluster-c0.k4kldeirxsoutbyybgqoiqdsgg.fx.cloudapp.net";
  Assert.assertEquals("Returned domainname is incorrect",
    "k4kldeirxsoutbyybgqoiqdsgg.fx.cloudapp.net",
    SliderUtils.extractDomainNameFromFQDN(fqdn));
  fqdn = "";
  Assert.assertEquals("Returned domainname should be empty string", "",
    SliderUtils.extractDomainNameFromFQDN(fqdn));
  fqdn = null;
  Assert.assertEquals("Returned domainname should be null", null,
    SliderUtils.extractDomainNameFromFQDN(fqdn));
  fqdn = "azure-cluster-c0";
  Assert.assertEquals("Returned domainname should be same as fqdn",
    "azure-cluster-c0", SliderUtils.extractDomainNameFromFQDN(fqdn));
  // should handle whitespaces as well
  fqdn = " www.example.com";
  Assert.assertEquals("Returned domainname is incorrect", "example.com",
    SliderUtils.extractDomainNameFromFQDN(fqdn));
 }
}