content: /**
   * JBoss, Home of Professional Open Source
   * Copyright Red Hat, Inc., and individual contributors.
   * <p>
   * Licensed 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.jboss.aerogear.unifiedpush.rest.util;
  
  import org.jboss.aerogear.unifiedpush.message.HealthNetworkService;
  import org.jboss.aerogear.unifiedpush.rest.util.error.ErrorBuilder;
  import org.jboss.aerogear.unifiedpush.service.HealthDBService;
  import org.jboss.aerogear.unifiedpush.service.impl.health.HealthDetails;
  import org.jboss.aerogear.unifiedpush.service.impl.health.HealthStatus;
  
  import javax.inject.Inject;
  import javax.servlet.ServletContext;
  import javax.servlet.http.HttpServletRequest;
  import javax.ws.rs.GET;
  import javax.ws.rs.Path;
  import javax.ws.rs.Produces;
  import javax.ws.rs.core.Context;
  import javax.ws.rs.core.MediaType;
  import javax.ws.rs.core.Response;
  import java.io.InputStream;
  import java.util.List;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.Future;
  import java.util.jar.Attributes;
  import java.util.jar.Manifest;
  
  /**
   * A class to test 'health' of the server
   */
  @Path("/sys/info")
  public class HealthCheck {
  
      @Inject
      private HealthDBService healthDBService;
  
      @Inject
      private HealthNetworkService healthNetworkService;
  
      /**
       * Get health status
       *
       * @return {@link HealthStatus} with details
       *
       * @throws ExecutionException   The computation of health status threw an exception
       * @throws InterruptedException The thread, which compute health status, was interrupted
       */
      @GET
      @Path("/health")
      @Produces(MediaType.APPLICATION_JSON)
      public HealthStatus health() throws ExecutionException, InterruptedException {
          final HealthStatus status = new HealthStatus();
  
          final Future<HealthDetails> dbStatus = healthDBService.dbStatus();
          final Future<List<HealthDetails>> networkStatus = healthNetworkService.networkStatus();
  
          status.add(dbStatus.get());
          networkStatus.get().forEach(status::add);
  
          return status;
      }
  
      /**
       * Simple Ping endpoint to check if the UPS is running as expected
       *
       * @return simple OK string if the server is running
       */
      @GET
      @Path("/ping")
      @Produces(MediaType.TEXT_PLAIN)
      public Response ping() {
          return Response.ok("OK").build();
      }
  
  
      /**
       * Endpoint to verify scm and version details
       *
       * @return {@link Attributes}
       * @statuscode 200 Successful response for your request with manifest's attributes
       * @statuscode 404 Not found version information
       */
      @GET
      @Path("/version")
      @Produces(MediaType.APPLICATION_JSON)
      public Response manifestDetails(@Context HttpServletRequest request) {
  
          final ServletContext context = request.getSession().getServletContext();
  
          try (final InputStream manifestStream = context.getResourceAsStream("/META-INF/MANIFEST.MF")) {
              return Response.ok(new Manifest(manifestStream).getMainAttributes()).build();
          } catch (Exception e) {
              return Response.status(Response.Status.NOT_FOUND).entity(ErrorBuilder.forHealthCheck().noVersion().build()).build();
          }
      }
  }
  