/*
    * 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.shiro.samples;
  
  import org.apache.shiro.SecurityUtils;
  import org.apache.shiro.authc.UsernamePasswordToken;
  import org.apache.shiro.authz.AuthorizationException;
  import org.apache.shiro.mgt.SecurityManager;
  import org.apache.shiro.subject.Subject;
  import org.apache.shiro.util.Assert;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Component;
  
  import javax.annotation.PostConstruct;
  
  /**
   * Simple Bean used to demonstrate subject usage.
   */
  @Component
  public class QuickStart {
  
      private static Logger log = LoggerFactory.getLogger(QuickStart.class);
  
      @Autowired
      private SecurityManager securityManager;
  
      @Autowired
      private SimpleService simpleService;
  
      public void run() {
  
          // get the current subject
          Subject subject = SecurityUtils.getSubject();
  
          // Subject is not authenticated yet
          Assert.isTrue(!subject.isAuthenticated());
  
          // login the subject with a username / password
          UsernamePasswordToken token = new UsernamePasswordToken("joe.coder", "password");
          subject.login(token);
  
          // joe.coder has the "user" role
          subject.checkRole("user");
  
          // joe.coder does NOT have the admin role
          Assert.isTrue(!subject.hasRole("admin"));
  
          // joe.coder has the "read" permission
          subject.checkPermission("read");
  
          // current user is allowed to execute this method.
          simpleService.readRestrictedCall();
  
          try {
              // but not this one!
              simpleService.writeRestrictedCall();
          }
          catch (AuthorizationException e) {
              log.info("Subject was NOT allowed to execute method 'writeRestrictedCall'");
          }
  
          // logout
          subject.logout();
          Assert.isTrue(!subject.isAuthenticated());
      }
  
  
      /**
       * Sets the static instance of SecurityManager. This is NOT needed for web applications.
       */
      @PostConstruct
      private void initStaticSecurityManager() {
          SecurityUtils.setSecurityManager(securityManager);
      }
  }