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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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.activemq.artemis.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.invoke.MethodHandles;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.management.LockInfo;
import java.lang.management.ManagementFactory;
import java.lang.management.MonitorInfo;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;

public final class ThreadDumpUtil {
   private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

   public static String threadDump(final String msg) {

      try (
         StringWriter str = new StringWriter();
         PrintWriter out = new PrintWriter(str)
      ) {

         ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();

         out.println("*******************************************************************************");
         out.println("Complete Thread dump " + msg);

         for (ThreadInfo threadInfo : threadMXBean.dumpAllThreads(true, true)) {
            out.println(threadInfoToString(threadInfo));
         }

         long[] deadlockedThreads = threadMXBean.findDeadlockedThreads();

         if (deadlockedThreads != null && deadlockedThreads.length > 0) {
            out.println("Deadlock detected!");
            out.println();

            for (ThreadInfo threadInfo : threadMXBean.getThreadInfo(deadlockedThreads, true, true)) {
               out.println(threadInfoToString(threadInfo));
            }
         }

         out.println("===============================================================================");
         out.println("End Thread dump " + msg);
         out.println("*******************************************************************************");

         return str.toString();

      } catch (IOException e) {
         logger.error("Exception thrown during generating of thread dump.", e);
      }

      return "Generating of thread dump failed " + msg;

   }

   private static String threadInfoToString(ThreadInfo threadInfo) {
      StringBuilder sb = new StringBuilder("\"" + threadInfo.getThreadName() + "\"" +
            " Id=" + threadInfo.getThreadId() + " " +
            threadInfo.getThreadState());
      if (threadInfo.getLockName() != null) {
         sb.append(" on " + threadInfo.getLockName());
      }
      if (threadInfo.getLockOwnerName() != null) {
         sb.append(" owned by \"" + threadInfo.getLockOwnerName() +
               "\" Id=" + threadInfo.getLockOwnerId());
      }
      if (threadInfo.isSuspended()) {
         sb.append(" (suspended)");
      }
      if (threadInfo.isInNative()) {
         sb.append(" (in native)");
      }
      sb.append('\n');
      int i = 0;
      for (; i < threadInfo.getStackTrace().length; i++) {
         StackTraceElement ste = threadInfo.getStackTrace()[i];
         sb.append("\tat " + ste.toString());
         sb.append('\n');
         if (i == 0 && threadInfo.getLockInfo() != null) {
            Thread.State ts = threadInfo.getThreadState();
            switch (ts) {
               case BLOCKED:
                  sb.append("\t-  blocked on " + threadInfo.getLockInfo());
                  sb.append('\n');
                  break;
               case WAITING:
               case TIMED_WAITING:
                  sb.append("\t-  waiting on " + threadInfo.getLockInfo());
                  sb.append('\n');
                  break;
               default:
            }
         }

         for (MonitorInfo mi : threadInfo.getLockedMonitors()) {
            if (mi.getLockedStackDepth() == i) {
               sb.append("\t-  locked " + mi);
               sb.append('\n');
            }
         }
      }

      LockInfo[] locks = threadInfo.getLockedSynchronizers();
      if (locks.length > 0) {
         sb.append("\n\tNumber of locked synchronizers = " + locks.length);
         sb.append('\n');
         for (LockInfo li : locks) {
            sb.append("\t- " + li);
            sb.append('\n');
         }
      }
      sb.append('\n');
      return sb.toString();
   }

}