Spring Boot - Log all configuration properties on application startup

PropertyLogger.java

import java.util.Arrays;
import java.util.List;
import java.util.stream.StreamSupport;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Profile;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.env.AbstractEnvironment;
import org.springframework.core.env.EnumerablePropertySource;
import org.springframework.core.env.Environment;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.stereotype.Component;

@Slf4j
@Component
public class PropertyLogger {

  /**
   * Shows all properties of running environment.<br>
   * See: <a href="https://gist.github.com/sandor-nemeth/f6d2899b714e017266cb9cce66bc719d">sandor-nemeth/PropertyLogger.java</a><br>
   *
   * @param event Event raised when an ApplicationContext gets initialized or refreshed.
   */
  @EventListener
  public void handleContextRefresh(ContextRefreshedEvent event) {
    final Environment env = event.getApplicationContext().getEnvironment();
    log.debug("====== Environment and configuration ======");
    log.debug("Active profiles: {}", Arrays.toString(env.getActiveProfiles()));
    final MutablePropertySources sources = ((AbstractEnvironment) env).getPropertySources();

    final List<String> discardedProperties =
      List.of("credentials", "password", "id", "secret", "key");

    StreamSupport.stream(sources.spliterator(), false)
      .filter(ps -> ps instanceof EnumerablePropertySource)
      .flatMap(ps -> Arrays.stream(((EnumerablePropertySource) ps).getPropertyNames()))
      .distinct()
      .filter(
        prop -> discardedProperties
                .stream()
                .noneMatch(discarded -> prop.toLowerCase().contains(discarded))
      )
      .forEach(prop -> log.debug(String.format("%-60s : %s", prop, env.getProperty(prop))));

    log.debug("====== Environment and configuration ======");
  }
}