io.mantisrx.server.agent.JvmUtils Maven / Gradle / Ivy
/*
* Copyright 2022 Netflix, Inc.
*
* 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 io.mantisrx.server.agent;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.Arrays;
import java.util.Collection;
/**
* Utilities for {@link java.lang.management.ManagementFactory}.
*/
public final class JvmUtils {
/**
* Creates a thread dump of the current JVM.
*
* @return the thread dump of current JVM
*/
public static Collection createThreadDump() {
ThreadMXBean threadMxBean = ManagementFactory.getThreadMXBean();
return Arrays.asList(threadMxBean.dumpAllThreads(true, true));
}
public static String createThreadDumpAsString() {
final StringBuilder dump = new StringBuilder();
final Collection threadInfos = createThreadDump();
for (ThreadInfo threadInfo : threadInfos) {
dump.append('"');
dump.append(threadInfo.getThreadName());
dump.append("\" ");
final Thread.State state = threadInfo.getThreadState();
dump.append("\n java.lang.Thread.State: ");
dump.append(state);
final StackTraceElement[] stackTraceElements = threadInfo.getStackTrace();
for (final StackTraceElement stackTraceElement : stackTraceElements) {
dump.append("\n at ");
dump.append(stackTraceElement);
}
dump.append("\n\n");
}
return dump.toString();
}
/**
* Private default constructor to avoid instantiation.
*/
private JvmUtils() {
}
}