public String getComponentName() {
    return componentName;
  }
Gets the name of the component, if any, that this alert instance is for.
Some alerts, such as those that are scoped for the entire service, do not
have component names.

@return the name of the component, or {@code null} for none.
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/AlertHistoryEntity.java