content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      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 com.alibaba.csp.sentinel.dashboard.discovery;
  
  import java.util.Comparator;
  import java.util.HashSet;
  import java.util.Optional;
  import java.util.Iterator;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  import com.alibaba.csp.sentinel.dashboard.config.DashboardConfig;
  
  public class AppInfo {
  
      private String app = "";
  
      private Integer appType = 0;
  
      private Set<MachineInfo> machines = ConcurrentHashMap.newKeySet();
  
      public AppInfo() {}
  
      public AppInfo(String app) {
          this.app = app;
      }
  
      public AppInfo(String app, Integer appType) {
          this.app = app;
          this.appType = appType;
      }
  
      public String getApp() {
          return app;
      }
  
      public void setApp(String app) {
          this.app = app;
      }
  
      public Integer getAppType() {
          return appType;
      }
  
      public void setAppType(Integer appType) {
          this.appType = appType;
      }
  
      /**
       * Get the current machines.
       *
       * @return a new copy of the current machines.
       */
      public Set<MachineInfo> getMachines() {
          return new HashSet<>(machines);
      }
  
      @Override
      public String toString() {
          return "AppInfo{" + "app='" + app + ", machines=" + machines + '}';
      }
  
      public boolean addMachine(MachineInfo machineInfo) {
          machines.remove(machineInfo);
          return machines.add(machineInfo);
      }
  
      public synchronized boolean removeMachine(String ip, int port) {
          Iterator<MachineInfo> it = machines.iterator();
          while (it.hasNext()) {
              MachineInfo machine = it.next();
              if (machine.getIp().equals(ip) && machine.getPort() == port) {
                  it.remove();
                  return true;
              }
          }
          return false;
      }
  
      public Optional<MachineInfo> getMachine(String ip, int port) {
          return machines.stream()
              .filter(e -> e.getIp().equals(ip) && e.getPort().equals(port))
              .findFirst();
      }
  
      public Optional<MachineInfo> getMachine(String ip) {
          return machines.stream()
              .filter(e -> e.getIp().equals(ip))
              .findFirst();
      }
  
      private boolean heartbeatJudge(final int threshold) {
          if (machines.size() == 0) {
              return false;
          }
          if (threshold > 0) {
              long healthyCount = machines.stream()
                  .filter(MachineInfo::isHealthy)
                  .count();
              if (healthyCount == 0) {
                  // No healthy machines.
                  return machines.stream()
                      .max(Comparator.comparingLong(MachineInfo::getLastHeartbeat))
                      .map(e -> System.currentTimeMillis() - e.getLastHeartbeat() < threshold)
                      .orElse(false);
              }
          }
          return true;
      }
  
      /**
       * Check whether current application has no healthy machines and should not be displayed.
       *
       * @return true if the application should be displayed in the sidebar, otherwise false
       */
      public boolean isShown() {
          return heartbeatJudge(DashboardConfig.getHideAppNoMachineMillis());
      }
  
      /**
       * Check whether current application has no healthy machines and should be removed.
       *
       * @return true if the application is dead and should be removed, otherwise false
       */
      public boolean isDead() {
          return !heartbeatJudge(DashboardConfig.getRemoveAppNoMachineMillis());
      }
  }
  