/*
    * 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.logging.log4j.core.message;
  
  import java.lang.management.ManagementFactory;
  import java.lang.management.ThreadInfo;
  import java.lang.management.ThreadMXBean;
  import java.lang.reflect.Method;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.logging.log4j.message.ThreadDumpMessage;
  import org.apache.logging.log4j.message.ThreadInformation;
  
  /**
   * Factory to create extended thread information.
   */
  public class ExtendedThreadInfoFactory implements ThreadDumpMessage.ThreadInfoFactory {
      public ExtendedThreadInfoFactory() {
          final Method[] methods = ThreadInfo.class.getMethods();
          boolean basic = true;
          for (final Method method : methods) {
              if (method.getName().equals("getLockInfo")) {
                  basic = false;
                  break;
              }
          }
          if (basic) {
              throw new IllegalStateException();
          }
      }
      @Override
      public Map<ThreadInformation, StackTraceElement[]> createThreadInfo() {
          final ThreadMXBean bean = ManagementFactory.getThreadMXBean();
          final ThreadInfo[] array = bean.dumpAllThreads(true, true);
  
          final Map<ThreadInformation, StackTraceElement[]>  threads =
              new HashMap<>(array.length);
          for (final ThreadInfo info : array) {
              threads.put(new ExtendedThreadInformation(info), info.getStackTrace());
          }
          return threads;
      }
  }