Spring embedded LDAP Server

README

https://github.com/spring-projects/spring-boot/pull/13502: Add support to set base in EmbeddedLdapAutoConfiguration
  declined

https://github.com/spring-projects/spring-boot/issues/12646: embeded ldap autocongiguration bug
  Duplicate of #11693.
  declined/closed
  
https://github.com/spring-projects/spring-boot/issues/11693: EmbeddedLdapAutoConfiguration not setting the base information into the LdapContextSource
  That's inaccurate. #10443 has been closed as a duplicate of #10444 and the latter has been declined.
  closed
  
https://github.com/spring-projects/spring-boot/issues/10443: Provide ability to set contextSource base through spring.ldap.base property when using embedded LDAP autoconfiguration
  closed in favor of #10444

https://github.com/spring-projects/spring-boot/pull/10444: Ldap contextSource base property populating in EmbeddedLdapAutoConfig
  This broke Spring Data's integration tests and, looking at the error, this change is way more invasive than I thought. Perhaps you could provide a solution that is opt-in instead?
  declined
  
=> https://github.com/kamkie/spring-ldap-bug/blob/master/src/test/java/com/example/springldapbug/LdapConfigurationWorkaround.java

Caused by: java.lang.IllegalArgumentException: PersistentEntity must not be null!
  => https://stackoverflow.com/questions/47969157/incompatibility-between-spring-ldap-and-spring-data-rest
  => https://jira.spring.io/browse/DATALDAP-60: Enable Spring Data LDAP for Spring Data REST usage
  => https://jira.spring.io/browse/DATAREST-1198: Add Converter to convert String to javax.naming.ldap.LdapName

LdapConfigurationWorkaround.java

package com.example.springldapbug;

import org.springframework.boot.autoconfigure.ldap.LdapProperties;
import org.springframework.boot.autoconfigure.ldap.embedded.EmbeddedLdapProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.test.context.TestConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.env.Environment;
import org.springframework.ldap.core.ContextSource;
import org.springframework.ldap.core.support.LdapContextSource;
import org.springframework.util.StringUtils;

@TestConfiguration
@EnableConfigurationProperties({LdapProperties.class, EmbeddedLdapProperties.class})
public class LdapConfigurationWorkaround {

    @Bean
    @DependsOn("directoryServer")
    public ContextSource ldapContextSource(Environment environment,
                                           LdapProperties properties,
                                           EmbeddedLdapProperties embeddedProperties) {
        LdapContextSource source = new LdapContextSource();
        if (hasCredentials(embeddedProperties.getCredential())) {
            source.setUserDn(embeddedProperties.getCredential().getUsername());
            source.setPassword(embeddedProperties.getCredential().getPassword());
        }
        source.setUrls(properties.determineUrls(environment));
        source.setBase(embeddedProperties.getBaseDn().get(0));
        return source;
    }

    private boolean hasCredentials(EmbeddedLdapProperties.Credential credential) {
        return StringUtils.hasText(credential.getUsername())
                && StringUtils.hasText(credential.getPassword());
    }
}