Java ThreadInfo类代码示例

import java.lang.management.ThreadInfo; //导入依赖的package包/类
/**
 * Waits until {@link TestThread} is in the certain {@link State}
 * and blocking on {@code object}.
 *
 * @param state The thread state
 * @param object The object to block on
 */
public void waitUntilBlockingOnObject(Thread.State state, Object object) {
    String want = object == null ? null : object.getClass().getName() + '@'
            + Integer.toHexString(System.identityHashCode(object));
    ThreadMXBean tmx = ManagementFactory.getThreadMXBean();
    while (isAlive()) {
        ThreadInfo ti = tmx.getThreadInfo(getId());
        if (ti.getThreadState() == state
                && (want == null || want.equals(ti.getLockName()))) {
            return;
        }
        try {
            Thread.sleep(1);
        } catch (InterruptedException e) {
        }
    }
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private static StringBuilder printThread(ThreadInfo ti, StringBuilder sb) {
    sb.append("\"" + ti.getThreadName() + "\"" + " Id="
            + ti.getThreadId() + " in " + ti.getThreadState());
    if (ti.getLockName() != null) {
        sb.append(" waiting on lock=" + ti.getLockName());
    }
    if (ti.isSuspended()) {
        sb.append(" (suspended)");
    }
    if (ti.isInNative()) {
        sb.append(" (running in native)");
    }
    sb.append("\n");
    if (ti.getLockOwnerName() != null) {
        sb.append("\t owned by " + ti.getLockOwnerName() + " Id="
                + ti.getLockOwnerId()).append("\n");
    }
    return sb;
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
public ThreadInfo[] getThreadInfo(long[] ids, int maxDepth) {
    verifyThreadIds(ids);

    if (maxDepth < 0) {
        throw new IllegalArgumentException(
            "Invalid maxDepth parameter: " + maxDepth);
    }

    // ids has been verified to be non-null
    // an empty array of ids should return an empty array of ThreadInfos
    if (ids.length == 0) return new ThreadInfo[0];

    Util.checkMonitorAccess();

    ThreadInfo[] infos = new ThreadInfo[ids.length]; // nulls
    if (maxDepth == Integer.MAX_VALUE) {
        getThreadInfo1(ids, -1, infos);
    } else {
        getThreadInfo1(ids, maxDepth, infos);
    }
    return infos;
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private void internStackTrace(ThreadInfo tinfo) {
    if (steCache == null) {
        return;
    }

    StackTraceElement[] stack = tinfo.getStackTrace();

    for (int i = 0; i < stack.length; i++) {
        StackTraceElement ste = stack[i];
        WeakReference<StackTraceElement> oldStackRef = steCache.get(ste);

        if (oldStackRef != null) {
            stack[i] = oldStackRef.get();
            assert stack[i] != null;
        } else {
            steCache.put(ste, new WeakReference(ste));
        }
    }
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
public ThreadsIterator(final SabotContext dbContext, final OperatorContext context) {
  this.dbContext = dbContext;
  threadMXBean = ManagementFactory.getThreadMXBean();
  final long[] ids = threadMXBean.getAllThreadIds();

  final Iterator<Long> threadIdIterator = Longs.asList(ids).iterator();

  this.threadInfoIterator = Iterators.filter(
    Iterators.transform(threadIdIterator, new Function<Long, ThreadInfo>() {

      @Override
      public ThreadInfo apply(Long input) {
        return threadMXBean.getThreadInfo(input, 100);
      }
    }),
    Predicates.notNull());

  logger.debug("number of threads = {}, number of cores = {}", ids.length, NUMBER_OF_CORES);

  this.stats = dbContext.getWorkStatsProvider().get();
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
public static void badNameCompositeData() throws Exception {
    CompositeType ct =
        new CompositeType("MyCompositeType",
                          "CompositeType for ThreadInfo",
                          badItemNames,
                          badItemNames,
                          validItemTypes);
    CompositeData cd =
        new CompositeDataSupport(ct,
                                 badItemNames,
                                 values);

    try {
        ThreadInfo info = ThreadInfo.from(cd);
    } catch (IllegalArgumentException e) {
        System.out.println("Expected exception: " +
            e.getMessage());
        return;
    }
    throw new RuntimeException(
        "IllegalArgumentException not thrown");
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private void printThreads(final StringBuilder sb, ThreadDump td) {
    ThreadInfo[] threads = td.getThreads();
    boolean goToSourceAvailable = GoToSource.isAvailable();
    boolean jdk15 = td.isJDK15();

    sb.append("<pre>"); // NOI18N
    sb.append(" <b>Full thread dump: "); // NOI18N
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  // NOI18N
    sb.append(df.format(td.getTime()) + "</b><br><br>");
    for (ThreadInfo thread : threads) {
        if (thread != null) {
            if (jdk15) {
                print15Thread(sb, thread, goToSourceAvailable);
            } else {
                print16Thread(sb, thread, goToSourceAvailable);
            }
        }
    }
    sb.append("</pre>"); // NOI18N
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private void print15Thread(final StringBuilder sb, final ThreadInfo thread, boolean goToSourceAvailable) {
    sb.append("<br>\"" + thread.getThreadName() + // NOI18N
            "\" - Thread [email protected]" + thread.getThreadId() + "<br>");    // NOI18N
    sb.append("   java.lang.Thread.State: " + thread.getThreadState()); // NOI18N
    if (thread.getLockName() != null) {
        sb.append(" on " + thread.getLockName());   // NOI18N
        if (thread.getLockOwnerName() != null) {
            sb.append(" owned by: " + thread.getLockOwnerName());   // NOI18N
        }
    }
    sb.append("<br>");    // NOI18N
    for (StackTraceElement st : thread.getStackTrace()) {
        String stackElementText = htmlize(st.toString());
        String stackEl = stackElementText;
        if (goToSourceAvailable) {
            String className = st.getClassName();
            String method = st.getMethodName();
            int lineNo = st.getLineNumber();
            String stackUrl = OPEN_THREADS_URL + className + "|" + method + "|" + lineNo; // NOI18N
            stackEl = "<a href=\"" + stackUrl + "\">" + stackElementText + "</a>";    // NOI18N
        }
        sb.append("        at ").append(stackEl).append("<br>");    // NOI18N
    }
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
/**
 * Formats the thread dump header for one thread.
 *
 * @param ti the ThreadInfo describing the thread
 * @return the formatted thread dump header
 */
private static String getThreadDumpHeader(ThreadInfo ti) {
    StringBuilder sb = new StringBuilder("\"" + ti.getThreadName() + "\"");
    sb.append(" Id=" + ti.getThreadId());
    sb.append(" cpu=" + threadMXBean.getThreadCpuTime(ti.getThreadId()) +
              " ns");
    sb.append(" usr=" + threadMXBean.getThreadUserTime(ti.getThreadId()) +
              " ns");
    sb.append(" blocked " + ti.getBlockedCount() + " for " +
              ti.getBlockedTime() + " ms");
    sb.append(" waited " + ti.getWaitedCount() + " for " +
              ti.getWaitedTime() + " ms");

    if (ti.isSuspended()) {
        sb.append(" (suspended)");
    }
    if (ti.isInNative()) {
        sb.append(" (running in native)");
    }
    sb.append(CRLF);
    sb.append(INDENT3 + "java.lang.Thread.State: " + ti.getThreadState());
    sb.append(CRLF);
    return sb.toString();
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
/**
 * This method return true/false if a Thread, given by it's name exists or not.
 * @param threadName2LookAt the name of the thread
 * @return boolean true, if the named thread exists
 */
public boolean threadExists(String threadName2LookAt) {
	
	boolean exists = false;
	
	long[] jvmThreadIDs = threadXB.getAllThreadIds();
	ThreadInfo[] jvmThreadInfo = threadXB.getThreadInfo(jvmThreadIDs);
	for (int i = 0; i < jvmThreadInfo.length; i++) {
		String threadName = jvmThreadInfo[i].getThreadName();
		if (threadName.equalsIgnoreCase(threadName2LookAt)) {
			exists = true;
			break;
		}
	}
	return exists;		
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
public static boolean isMonitorLockHeldByThread(Object o, Thread t) {
    int oihc = System.identityHashCode(o);
    ThreadMXBean tmxbean = ManagementFactory.getThreadMXBean();
    ThreadInfo[] tinfos = tmxbean.dumpAllThreads(true, false);

    for (ThreadInfo ti : tinfos) {
        if (!(t != null && t.getId() != ti.getThreadId())) {
            for (MonitorInfo mi : ti.getLockedMonitors()) {
                if (mi.getIdentityHashCode() == oihc) {
                    return true;
                }
            }
        }
    }
    return false;
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private void getThreadUsage(MetricsRecordBuilder rb) {
  int threadsNew = 0;
  int threadsRunnable = 0;
  int threadsBlocked = 0;
  int threadsWaiting = 0;
  int threadsTimedWaiting = 0;
  int threadsTerminated = 0;
  long threadIds[] = threadMXBean.getAllThreadIds();
  for (ThreadInfo threadInfo : threadMXBean.getThreadInfo(threadIds, 0)) {
    if (threadInfo == null) continue; // race protection
    switch (threadInfo.getThreadState()) {
      case NEW:           threadsNew++;           break;
      case RUNNABLE:      threadsRunnable++;      break;
      case BLOCKED:       threadsBlocked++;       break;
      case WAITING:       threadsWaiting++;       break;
      case TIMED_WAITING: threadsTimedWaiting++;  break;
      case TERMINATED:    threadsTerminated++;    break;
    }
  }
  rb.addGauge(ThreadsNew, threadsNew)
    .addGauge(ThreadsRunnable, threadsRunnable)
    .addGauge(ThreadsBlocked, threadsBlocked)
    .addGauge(ThreadsWaiting, threadsWaiting)
    .addGauge(ThreadsTimedWaiting, threadsTimedWaiting)
    .addGauge(ThreadsTerminated, threadsTerminated);
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
@Override
public void run() {
    while(goOn) {
        try {
            long[] ids = ManagementFactory.getThreadMXBean().findDeadlockedThreads();
            checkCount.incrementAndGet();
            ids = ids == null ? new long[0] : ids;
            if (ids.length == 1) {
                throw new RuntimeException("Found 1 deadlocked thread: "+ids[0]);
            } else if (ids.length > 0) {
                ThreadInfo[] infos = ManagementFactory.getThreadMXBean()
                    .getThreadInfo(ids, Integer.MAX_VALUE);
                System.err.println("Found "+ids.length+" deadlocked threads: ");
                for (ThreadInfo inf : infos) {
                    System.err.println(inf.toString());
                }
                throw new RuntimeException("Found "+ids.length+" deadlocked threads");
            }
            Thread.sleep(100);
        } catch(InterruptedException | RuntimeException x) {
            fail(x);
        }
    }
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private static int countTimerThreads() {
  ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
  
  int count = 0;
  ThreadInfo[] infos = threadBean.getThreadInfo(threadBean.getAllThreadIds(), 20);
  for (ThreadInfo info : infos) {
    if (info == null) continue;
    for (StackTraceElement elem : info.getStackTrace()) {
      if (elem.getClassName().contains("Timer")) {
        count++;
        break;
      }
    }
  }
  return count;
}
 

import java.lang.management.ThreadInfo; //导入依赖的package包/类
private static void printThreadInfo(ThreadInfo ti, PrintWriter out) {
  // print thread information
  printThread(ti, out);

  // print stack trace with locks
  StackTraceElement[] stacktrace = ti.getStackTrace();
  MonitorInfo[] monitors = ti.getLockedMonitors();
  for (int i = 0; i < stacktrace.length; i++) {
    StackTraceElement ste = stacktrace[i];
    out.println(INDENT + "at " + ste.toString());
    for (MonitorInfo mi : monitors) {
      if (mi.getLockedStackDepth() == i) {
        out.println(INDENT + "  - locked " + mi);
      }
    }
  }
  out.println();
}