我正在尝试编写一些线程管理实用程序,并阅读 ThreadMXBean。
http://download.oracle.com/javase/6/docs/api/java/lang/management/ThreadMXBean.html#dumpAllThreads(boolean, boolean)
根据文档, getThreadInfo(long[] ids, int maxDepth) “不会获取线程的锁定监视器和锁定同步器”,但是,那些允许您指定 true 以获取锁定/监视器信息的方法似乎没有使您能够指定 maxDepth。
我可以做些什么来指定是否获取监视器/锁定信息以及堆栈深度?
提前致谢!
最佳答案
您可以从 ThreadInfo 复制 toString(),但删除堆栈深度限制以提供以下内容:
public String dump(ThreadInfo info) {
StringBuilder sb = new StringBuilder("\"" + info.getThreadName() + "\""
+ " Id=" + info.getThreadId() + " " + info.getThreadState());
if (info.getLockName() != null) {
sb.append(" on " + info.getLockName());
}
if (info.getLockOwnerName() != null) {
sb.append(" owned by \"" + info.getLockOwnerName() + "\" Id="
+ info.getLockOwnerId());
}
if (info.isSuspended()) {
sb.append(" (suspended)");
}
if (info.isInNative()) {
sb.append(" (in native)");
}
sb.append('\n');
int i = 0;
for (; i < info.getStackTrace().length; i++) {
StackTraceElement ste = info.getStackTrace()[i];
sb.append("\tat " + ste.toString());
sb.append('\n');
if (i == 0 && info.getLockInfo() != null) {
Thread.State ts = info.getThreadState();
switch (ts) {
case BLOCKED:
sb.append("\t- blocked on " + info.getLockInfo());
sb.append('\n');
break;
case WAITING:
sb.append("\t- waiting on " + info.getLockInfo());
sb.append('\n');
break;
case TIMED_WAITING:
sb.append("\t- waiting on " + info.getLockInfo());
sb.append('\n');
break;
default:
}
}
for (MonitorInfo mi : info.getLockedMonitors()) {
if (mi.getLockedStackDepth() == i) {
sb.append("\t- locked " + mi);
sb.append('\n');
}
}
}
if (i < info.getStackTrace().length) {
sb.append("\t...");
sb.append('\n');
}
LockInfo[] locks = info.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();
}
然后为每个从 ThreadMxBean.dumpAllThreads() 返回的 ThreadInfo 调用此方法
关于java - ThreadMXBean.dumpAllThreads() 最大深度,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/6827952/