How to use

org.apache.catalina.realm.NullRealm

constructor

realm = new NullRealm();

/**
 * Returns the {@link Engine} of the specified Tomcat {@link Service}. If the {@link Service} has no
 * {@link Engine} set, a new {@link Engine} will be created and set.
 *
 * <p>The return type of {@link Service#getContainer()} has been changed from {@link Container} to
 * {@link Engine} since 8.5. Calling it directly will cause {@link NoSuchMethodError}.
 */
static Engine engine(Service service, String hostname) {
  final Engine engine;
  try {
    final Method m = Service.class.getDeclaredMethod("getContainer");
    engine = (Engine) m.invoke(service);
  } catch (Exception e) {
    throw new Error("failed to invoke Service.getContainer()", e);
  }
  if (engine != null) {
    return engine;
  }
  // Create a new engine.
  final Engine newEngine = new StandardEngine();
  newEngine.setName("Tomcat");
  newEngine.setDefaultHost(hostname);
  newEngine.setRealm(new NullRealm());
  service.setContainer(newEngine);
  return newEngine;
}

/**
 * Obtain the configured Realm and provide a default Realm implementation
 * when no explicit configuration is set.
 *
 * @return configured realm, or a {@link NullRealm} by default
 */
@Override
public Realm getRealm() {
  Realm configured = super.getRealm();
  // If no set realm has been called - default to NullRealm
  // This can be overridden at engine, context and host level
  if (configured == null) {
    configured = new NullRealm();
    this.setRealm(configured);
  }
  return configured;
}

/**
 * Obtain the configured Realm and provide a default Realm implementation
 * when no explicit configuration is set.
 *
 * @return configured realm, or a {@link NullRealm} by default
 */
@Override
public Realm getRealm() {
  Realm configured = super.getRealm();
  // If no set realm has been called - default to NullRealm
  // This can be overridden at engine, context and host level
  if (configured == null) {
    configured = new NullRealm();
    this.setRealm(configured);
  }
  return configured;
}

/**
 * Obtain the configured Realm and provide a default Realm implementation
 * when no explicit configuration is set.
 *
 * @return configured realm, or a {@link NullRealm} by default
 */
@Override
public Realm getRealm() {
  Realm configured = super.getRealm();
  // If no set realm has been called - default to NullRealm
  // This can be overridden at engine, context and host level  
  if (configured == null) {
    configured = new NullRealm();
    this.setRealm(configured);
  }
  return configured;
}

/**
 * Obtain the configured Realm and provide a default Realm implementation
 * when no explicit configuration is set.
 *
 * @return configured realm, or a {@link NullRealm} by default
 */
@Override
public Realm getRealm() {
  Realm configured = super.getRealm();
  // If no set realm has been called - default to NullRealm
  // This can be overridden at engine, context and host level  
  if (configured == null) {
    configured = new NullRealm();
    this.setRealm(configured);
  }
  return configured;
}

/**
 * Obtain the configured Realm and provide a default Realm implementation
 * when no explicit configuration is set.
 *
 * @return configured realm, or a {@link NullRealm} by default
 */
@Override
public Realm getRealm() {
  Realm configured = super.getRealm();
  // If no set realm has been called - default to NullRealm
  // This can be overridden at engine, context and host level
  if (configured == null) {
    configured = new NullRealm();
    this.setRealm(configured);
  }
  return configured;
}

  embedded.getEngine().setRealm(realm);
} else {
  realm = new NullRealm();
  embedded.getEngine().setRealm(realm);