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jdk/src/java.management/share/classes/sun/management/ThreadImpl.java
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
@@ -24,97 +24,105 @@
*/
package sun.management;
import java.lang.management.ManagementFactory;
-
import java.lang.management.ThreadInfo;
-
+import java.lang.management.ThreadMXBean;
import javax.management.ObjectName;
/**
- * Implementation class for the thread subsystem.
- * Standard and committed hotspot-specific metrics if any.
- *
- * ManagementFactory.getThreadMXBean() returns an instance
- * of this class.
+ * Implementation for java.lang.management.ThreadMXBean as well as providing the
+ * supporting method for com.sun.management.ThreadMXBean.
+ * The supporting method for com.sun.management.ThreadMXBean can be moved to
+ * jdk.management in the future.
*/
-class ThreadImpl implements com.sun.management.ThreadMXBean {
+public class ThreadImpl implements ThreadMXBean {
private final VMManagement jvm;
// default for thread contention monitoring is disabled.
private boolean contentionMonitoringEnabled = false;
private boolean cpuTimeEnabled;
private boolean allocatedMemoryEnabled;
/**
* Constructor of ThreadImpl class.
*/
- ThreadImpl(VMManagement vm) {
+ protected ThreadImpl(VMManagement vm) {
this.jvm = vm;
this.cpuTimeEnabled = jvm.isThreadCpuTimeEnabled();
this.allocatedMemoryEnabled = jvm.isThreadAllocatedMemoryEnabled();
}
+ @Override
public int getThreadCount() {
return jvm.getLiveThreadCount();
}
+ @Override
public int getPeakThreadCount() {
return jvm.getPeakThreadCount();
}
+ @Override
public long getTotalStartedThreadCount() {
return jvm.getTotalThreadCount();
}
+ @Override
public int getDaemonThreadCount() {
return jvm.getDaemonThreadCount();
}
+ @Override
public boolean isThreadContentionMonitoringSupported() {
return jvm.isThreadContentionMonitoringSupported();
}
+ @Override
public synchronized boolean isThreadContentionMonitoringEnabled() {
if (!isThreadContentionMonitoringSupported()) {
throw new UnsupportedOperationException(
"Thread contention monitoring is not supported.");
}
return contentionMonitoringEnabled;
}
+ @Override
public boolean isThreadCpuTimeSupported() {
return jvm.isOtherThreadCpuTimeSupported();
}
+ @Override
public boolean isCurrentThreadCpuTimeSupported() {
return jvm.isCurrentThreadCpuTimeSupported();
}
- public boolean isThreadAllocatedMemorySupported() {
+ protected boolean isThreadAllocatedMemorySupported() {
return jvm.isThreadAllocatedMemorySupported();
}
+ @Override
public boolean isThreadCpuTimeEnabled() {
if (!isThreadCpuTimeSupported() &&
!isCurrentThreadCpuTimeSupported()) {
throw new UnsupportedOperationException(
"Thread CPU time measurement is not supported");
}
return cpuTimeEnabled;
}
- public boolean isThreadAllocatedMemoryEnabled() {
+ protected boolean isThreadAllocatedMemoryEnabled() {
if (!isThreadAllocatedMemorySupported()) {
throw new UnsupportedOperationException(
"Thread allocated memory measurement is not supported");
}
return allocatedMemoryEnabled;
}
+ @Override
public long[] getAllThreadIds() {
Util.checkMonitorAccess();
Thread[] threads = getThreads();
int length = threads.length;
@@ -124,24 +132,27 @@
ids[i] = t.getId();
}
return ids;
}
+ @Override
public ThreadInfo getThreadInfo(long id) {
long[] ids = new long[1];
ids[0] = id;
final ThreadInfo[] infos = getThreadInfo(ids, 0);
return infos[0];
}
+ @Override
public ThreadInfo getThreadInfo(long id, int maxDepth) {
long[] ids = new long[1];
ids[0] = id;
final ThreadInfo[] infos = getThreadInfo(ids, maxDepth);
return infos[0];
}
+ @Override
public ThreadInfo[] getThreadInfo(long[] ids) {
return getThreadInfo(ids, 0);
}
private void verifyThreadIds(long[] ids) {
@@ -155,10 +166,11 @@
"Invalid thread ID parameter: " + ids[i]);
}
}
}
+ @Override
public ThreadInfo[] getThreadInfo(long[] ids, int maxDepth) {
verifyThreadIds(ids);
if (maxDepth < 0) {
throw new IllegalArgumentException(
@@ -174,10 +186,11 @@
getThreadInfo1(ids, maxDepth, infos);
}
return infos;
}
+ @Override
public void setThreadContentionMonitoringEnabled(boolean enable) {
if (!isThreadContentionMonitoringSupported()) {
throw new UnsupportedOperationException(
"Thread contention monitoring is not supported");
}
@@ -207,17 +220,19 @@
"Current thread CPU time measurement is not supported.");
}
return isThreadCpuTimeEnabled();
}
+ @Override
public long getCurrentThreadCpuTime() {
if (verifyCurrentThreadCpuTime()) {
return getThreadTotalCpuTime0(0);
}
return -1;
}
+ @Override
public long getThreadCpuTime(long id) {
long[] ids = new long[1];
ids[0] = id;
final long[] times = getThreadCpuTime(ids);
return times[0];
@@ -245,11 +260,11 @@
}
return isThreadCpuTimeEnabled();
}
- public long[] getThreadCpuTime(long[] ids) {
+ protected long[] getThreadCpuTime(long[] ids) {
boolean verified = verifyThreadCpuTime(ids);
int length = ids.length;
long[] times = new long[length];
java.util.Arrays.fill(times, -1);
@@ -266,25 +281,27 @@
}
}
return times;
}
+ @Override
public long getCurrentThreadUserTime() {
if (verifyCurrentThreadCpuTime()) {
return getThreadUserCpuTime0(0);
}
return -1;
}
+ @Override
public long getThreadUserTime(long id) {
long[] ids = new long[1];
ids[0] = id;
final long[] times = getThreadUserTime(ids);
return times[0];
}
- public long[] getThreadUserTime(long[] ids) {
+ protected long[] getThreadUserTime(long[] ids) {
boolean verified = verifyThreadCpuTime(ids);
int length = ids.length;
long[] times = new long[length];
java.util.Arrays.fill(times, -1);
@@ -301,10 +318,11 @@
}
}
return times;
}
+ @Override
public void setThreadCpuTimeEnabled(boolean enable) {
if (!isThreadCpuTimeSupported() &&
!isCurrentThreadCpuTimeSupported()) {
throw new UnsupportedOperationException(
"Thread CPU time measurement is not supported");
@@ -318,11 +336,11 @@
cpuTimeEnabled = enable;
}
}
}
- public long getThreadAllocatedBytes(long id) {
+ protected long getThreadAllocatedBytes(long id) {
long[] ids = new long[1];
ids[0] = id;
final long[] sizes = getThreadAllocatedBytes(ids);
return sizes[0];
}
@@ -337,11 +355,11 @@
}
return isThreadAllocatedMemoryEnabled();
}
- public long[] getThreadAllocatedBytes(long[] ids) {
+ protected long[] getThreadAllocatedBytes(long[] ids) {
boolean verified = verifyThreadAllocatedMemory(ids);
long[] sizes = new long[ids.length];
java.util.Arrays.fill(sizes, -1);
@@ -349,11 +367,11 @@
getThreadAllocatedMemory1(ids, sizes);
}
return sizes;
}
- public void setThreadAllocatedMemoryEnabled(boolean enable) {
+ protected void setThreadAllocatedMemoryEnabled(boolean enable) {
if (!isThreadAllocatedMemorySupported()) {
throw new UnsupportedOperationException(
"Thread allocated memory measurement is not supported.");
}
@@ -365,10 +383,11 @@
allocatedMemoryEnabled = enable;
}
}
}
+ @Override
public long[] findMonitorDeadlockedThreads() {
Util.checkMonitorAccess();
Thread[] threads = findMonitorDeadlockedThreads0();
if (threads == null) {
@@ -381,10 +400,11 @@
ids[i] = t.getId();
}
return ids;
}
+ @Override
public long[] findDeadlockedThreads() {
if (!isSynchronizerUsageSupported()) {
throw new UnsupportedOperationException(
"Monitoring of Synchronizer Usage is not supported.");
}
@@ -402,19 +422,22 @@
ids[i] = t.getId();
}
return ids;
}
+ @Override
public void resetPeakThreadCount() {
Util.checkControlAccess();
resetPeakThreadCount0();
}
+ @Override
public boolean isObjectMonitorUsageSupported() {
return jvm.isObjectMonitorUsageSupported();
}
+ @Override
public boolean isSynchronizerUsageSupported() {
return jvm.isSynchronizerUsageSupported();
}
private void verifyDumpThreads(boolean lockedMonitors,
@@ -430,18 +453,20 @@
}
Util.checkMonitorAccess();
}
+ @Override
public ThreadInfo[] getThreadInfo(long[] ids,
boolean lockedMonitors,
boolean lockedSynchronizers) {
verifyThreadIds(ids);
verifyDumpThreads(lockedMonitors, lockedSynchronizers);
return dumpThreads0(ids, lockedMonitors, lockedSynchronizers);
}
+ @Override
public ThreadInfo[] dumpAllThreads(boolean lockedMonitors,
boolean lockedSynchronizers) {
verifyDumpThreads(lockedMonitors, lockedSynchronizers);
return dumpThreads0(null, lockedMonitors, lockedSynchronizers);
}
@@ -467,10 +492,11 @@
boolean lockedSynchronizers);
// tid == 0 to reset contention times for all threads
private static native void resetContentionTimes0(long tid);
+ @Override
public ObjectName getObjectName() {
return Util.newObjectName(ManagementFactory.THREAD_MXBEAN_NAME);
}
}
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