content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package org.apache.causeway.core.webapp.health;
  
  import lombok.Builder;
  import java.util.List;
  import java.util.Optional;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Named;
  
  import org.springframework.boot.actuate.health.AbstractHealthIndicator;
  import org.springframework.boot.actuate.health.Health;
  import org.springframework.stereotype.Component;
  
  import org.apache.causeway.applib.services.health.HealthCheckService;
  import org.apache.causeway.applib.services.iactnlayer.InteractionService;
  import org.apache.causeway.core.security.authentication.InteractionContextFactory;
  
  @Component
  @Named("causeway.webapp.HealthCheckService") // logical name appears in the endpoint
  public class HealthIndicatorUsingHealthCheckService extends AbstractHealthIndicator {
  
      private final InteractionService interactionService;
      private final List<HealthCheckService> healthCheckServices;
  
      @Builder
      @Inject
      public HealthIndicatorUsingHealthCheckService(
              final InteractionService interactionService,
              final List<HealthCheckService> healthCheckServices) {
          this.interactionService = interactionService;
          this.healthCheckServices = healthCheckServices;
      }
  
      @Override
      protected void doHealthCheck(Health.Builder builder) {
          for (HealthCheckService healthCheckService : healthCheckServices) {
              org.apache.causeway.applib.services.health.Health health = interactionService.call(InteractionContextFactory.health(), healthCheckService::check);
              if (health != null) {
                  if(!health.isOk()) {
                      Optional.ofNullable(health.cause())
                              .ifPresentOrElse(ex -> builder.down(ex), () -> builder.down());
                      return;
                  }
              }
          }
          builder.up();
      }
  }
  