public abstract class LdapDnsProvider extends Object
An LDAP DNS provider is a concrete subclass of this class that has a zero-argument constructor. LDAP DNS providers are located using the ServiceLoader facility, as specified by InitialDirectContext. The ServiceLoader is used to create and register implementations of LdapDnsProvider.
An LDAP DNS provider can be used in environments where the default DNS resolution mechanism is not sufficient to accurately pinpoint the correct LDAP servers needed to perform LDAP operations. For example, in an environment containing a mix of ldap and ldaps servers you may want the LdapContext to query ldaps servers only.
| Modifier | Constructor | Description |
|---|---|---|
protected |
Creates a new instance of LdapDnsProvider. |
| Modifier and Type | Method | Description |
|---|---|---|
abstract Optional |
lookupEndpoints |
Lookup the endpoints and domain name for the given Context provider URL and environment. |
protected LdapDnsProvider()
LdapDnsProvider.SecurityException - if a security manager is present and its checkPermission method doesn't allow the RuntimePermission("ldapDnsProvider").public abstract Optional<LdapDnsProviderResult> lookupEndpoints(String url, Map<?,?> env) throws NamingException
Context provider URL and environment. The resolved endpoints and domain name are returned as an LdapDnsProviderResult. An endpoint is a String representation of an LDAP URL which points to an LDAP server to be used for LDAP operations. The syntax of an LDAP URL is defined by RFC 2255: The LDAP URL Format.
url - The Context provider URL
env - The Context environment.LdapDnsProviderResult or empty Optional if the lookup fails.NamingException - if the url is not valid or an error occurred while performing the lookup.NullPointerException - if either url or env are null.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.naming/javax/naming/ldap/spi/LdapDnsProvider.html