/*
* Copyright (c) 2004, 2012, 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
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package sun.management;
import java.lang.management.ThreadInfo;
import java.lang.management.MonitorInfo;
import java.lang.management.LockInfo;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.OpenDataException;
/**
* A CompositeData for ThreadInfo for the local management support.
* This class avoids the performance penalty paid to the
* construction of a CompositeData use in the local case.
*/
public class ThreadInfoCompositeData extends LazyCompositeData {
private final ThreadInfo threadInfo;
private final CompositeData cdata;
private final boolean currentVersion;
private final boolean hasV6;
private ThreadInfoCompositeData(ThreadInfo ti) {
this.threadInfo = ti;
this.currentVersion = true;
this.cdata = null;
this.hasV6 = true;
}
private ThreadInfoCompositeData(CompositeData cd) {
this.threadInfo = null;
this.currentVersion = ThreadInfoCompositeData.isCurrentVersion(cd);
this.cdata = cd;
this.hasV6 = ThreadInfoCompositeData.hasV6(cd);
}
public ThreadInfo getThreadInfo() {
return threadInfo;
}
public boolean hasV6() {
return hasV6;
}
public boolean isCurrentVersion() {
return currentVersion;
}
public static ThreadInfoCompositeData getInstance(CompositeData cd) {
validateCompositeData(cd);
return new ThreadInfoCompositeData(cd);
}
public static CompositeData toCompositeData(ThreadInfo ti) {
ThreadInfoCompositeData ticd = new ThreadInfoCompositeData(ti);
return ticd.getCompositeData();
}
protected CompositeData getCompositeData() {
// Convert StackTraceElement[] to CompositeData[]
StackTraceElement[] stackTrace = threadInfo.getStackTrace();
CompositeData[] stackTraceData =
new CompositeData[stackTrace.length];
for (int i = 0; i < stackTrace.length; i++) {
StackTraceElement ste = stackTrace[i];
stackTraceData[i] = StackTraceElementCompositeData.toCompositeData(ste);
}
// Convert MonitorInfo[] and LockInfo[] to CompositeData[]
CompositeData lockInfoData =
LockInfoCompositeData.toCompositeData(threadInfo.getLockInfo());
// Convert LockInfo[] and MonitorInfo[] to CompositeData[]
LockInfo[] lockedSyncs = threadInfo.getLockedSynchronizers();
CompositeData[] lockedSyncsData =
new CompositeData[lockedSyncs.length];
for (int i = 0; i < lockedSyncs.length; i++) {
LockInfo li = lockedSyncs[i];
lockedSyncsData[i] = LockInfoCompositeData.toCompositeData(li);
}
MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors();
CompositeData[] lockedMonitorsData =
new CompositeData[lockedMonitors.length];
for (int i = 0; i < lockedMonitors.length; i++) {
MonitorInfo mi = lockedMonitors[i];
lockedMonitorsData[i] = MonitorInfoCompositeData.toCompositeData(mi);
}
// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
// threadInfoItemNames!
final Object[] threadInfoItemValues = {
threadInfo.getThreadId(),
threadInfo.getThreadName(),
threadInfo.getThreadState().name(),
threadInfo.getBlockedTime(),
threadInfo.getBlockedCount(),
threadInfo.getWaitedTime(),
threadInfo.getWaitedCount(),
lockInfoData,
threadInfo.getLockName(),
threadInfo.getLockOwnerId(),
threadInfo.getLockOwnerName(),
stackTraceData,
threadInfo.isSuspended(),
threadInfo.isInNative(),
lockedMonitorsData,
lockedSyncsData,
threadInfo.isDaemon(),
threadInfo.getPriority(),
};
try {
return new CompositeDataSupport(threadInfoCompositeType,
threadInfoItemNames,
threadInfoItemValues);
} catch (OpenDataException e) {
// Should never reach here
throw new AssertionError(e);
}
}
// Attribute names
private static final String THREAD_ID = "threadId";
private static final String THREAD_NAME = "threadName";
private static final String THREAD_STATE = "threadState";
private static final String BLOCKED_TIME = "blockedTime";
private static final String BLOCKED_COUNT = "blockedCount";
private static final String WAITED_TIME = "waitedTime";
private static final String WAITED_COUNT = "waitedCount";
private static final String LOCK_INFO = "lockInfo";
private static final String LOCK_NAME = "lockName";
private static final String LOCK_OWNER_ID = "lockOwnerId";
private static final String LOCK_OWNER_NAME = "lockOwnerName";
private static final String STACK_TRACE = "stackTrace";
private static final String SUSPENDED = "suspended";
private static final String IN_NATIVE = "inNative";
private static final String DAEMON = "daemon";
private static final String PRIORITY = "priority";
private static final String LOCKED_MONITORS = "lockedMonitors";
private static final String LOCKED_SYNCS = "lockedSynchronizers";
private static final String[] threadInfoItemNames = {
THREAD_ID,
THREAD_NAME,
THREAD_STATE,
BLOCKED_TIME,
BLOCKED_COUNT,
WAITED_TIME,
WAITED_COUNT,
LOCK_INFO,
LOCK_NAME,
LOCK_OWNER_ID,
LOCK_OWNER_NAME,
STACK_TRACE,
SUSPENDED,
IN_NATIVE,
LOCKED_MONITORS,
LOCKED_SYNCS,
DAEMON,
PRIORITY,
};
// New attributes added in 6.0 ThreadInfo
private static final String[] threadInfoV6Attributes = {
LOCK_INFO,
LOCKED_MONITORS,
LOCKED_SYNCS,
};
private static final String[] threadInfoV9Attributes = {
DAEMON,
PRIORITY,
};
// Current version of ThreadInfo
private static final CompositeType threadInfoCompositeType;
// Previous version of ThreadInfo
private static final CompositeType threadInfoV6CompositeType;
// Previous-previous version of ThreadInfo
private static final CompositeType threadInfoV5CompositeType;
private static final CompositeType lockInfoCompositeType;
static {
try {
threadInfoCompositeType = (CompositeType)
MappedMXBeanType.toOpenType(ThreadInfo.class);
// Form a CompositeType for JDK 5.0 ThreadInfo version
threadInfoV5CompositeType =
TypeVersionMapper.getInstance().getVersionedCompositeType(
threadInfoCompositeType, TypeVersionMapper.V5
);
threadInfoV6CompositeType =
TypeVersionMapper.getInstance().getVersionedCompositeType(
threadInfoCompositeType, TypeVersionMapper.V6
);
} catch (OpenDataException e) {
// Should never reach here
throw new AssertionError(e);
}
// Each CompositeData object has its CompositeType associated
// with it. So we can get the CompositeType representing LockInfo
// from a mapped CompositeData for any LockInfo object.
// Thus we construct a random LockInfo object and pass it
// to LockInfoCompositeData to do the conversion.
Object o = new Object();
LockInfo li = new LockInfo(o.getClass().getName(),
System.identityHashCode(o));
CompositeData cd = LockInfoCompositeData.toCompositeData(li);
lockInfoCompositeType = cd.getCompositeType();
}
static boolean isV5Attribute(String itemName) {
for (String n : threadInfoV6Attributes) {
if (itemName.equals(n)) {
return false;
}
}
for (String n : threadInfoV9Attributes) {
if (itemName.equals(n)) {
return false;
}
}
return true;
}
static boolean isV6Attribute(String itemName) {
for (String n : threadInfoV9Attributes) {
if (itemName.equals(n)) {
return false;
}
}
return true;
}
public static boolean isCurrentVersion(CompositeData cd) {
if (cd == null) {
throw new NullPointerException("Null CompositeData");
}
return isTypeMatched(threadInfoCompositeType, cd.getCompositeType());
}
private static boolean hasV6(CompositeData cd) {
if (cd == null) {
throw new NullPointerException("Null CompositeData");
}
return isTypeMatched(threadInfoCompositeType, cd.getCompositeType()) ||
isTypeMatched(threadInfoV6CompositeType, cd.getCompositeType());
}
public long threadId() {
return getLong(cdata, THREAD_ID);
}
public String threadName() {
// The ThreadName item cannot be null so we check that
// it is present with a non-null value.
String name = getString(cdata, THREAD_NAME);
if (name == null) {
throw new IllegalArgumentException("Invalid composite data: " +
"Attribute " + THREAD_NAME + " has null value");
}
return name;
}
public Thread.State threadState() {
return Thread.State.valueOf(getString(cdata, THREAD_STATE));
}
public long blockedTime() {
return getLong(cdata, BLOCKED_TIME);
}
public long blockedCount() {
return getLong(cdata, BLOCKED_COUNT);
}
public long waitedTime() {
return getLong(cdata, WAITED_TIME);
}
public long waitedCount() {
return getLong(cdata, WAITED_COUNT);
}
public String lockName() {
// The LockName and LockOwnerName can legitimately be null,
// we don't bother to check the value
return getString(cdata, LOCK_NAME);
}
public long lockOwnerId() {
return getLong(cdata, LOCK_OWNER_ID);
}
public String lockOwnerName() {
return getString(cdata, LOCK_OWNER_NAME);
}
public boolean suspended() {
return getBoolean(cdata, SUSPENDED);
}
public boolean inNative() {
return getBoolean(cdata, IN_NATIVE);
}
public boolean isDaemon() {
return getBoolean(cdata, DAEMON);
}
public int getPriority(){
return getInt(cdata, PRIORITY);
}
public StackTraceElement[] stackTrace() {
CompositeData[] stackTraceData =
(CompositeData[]) cdata.get(STACK_TRACE);
// The StackTrace item cannot be null, but if it is we will get
// a NullPointerException when we ask for its length.
StackTraceElement[] stackTrace =
new StackTraceElement[stackTraceData.length];
for (int i = 0; i < stackTraceData.length; i++) {
CompositeData cdi = stackTraceData[i];
stackTrace[i] = StackTraceElementCompositeData.from(cdi);
}
return stackTrace;
}
// 6.0 new attributes
public LockInfo lockInfo() {
CompositeData lockInfoData = (CompositeData) cdata.get(LOCK_INFO);
return LockInfo.from(lockInfoData);
}
public MonitorInfo[] lockedMonitors() {
CompositeData[] lockedMonitorsData =
(CompositeData[]) cdata.get(LOCKED_MONITORS);
// The LockedMonitors item cannot be null, but if it is we will get
// a NullPointerException when we ask for its length.
MonitorInfo[] monitors =
new MonitorInfo[lockedMonitorsData.length];
for (int i = 0; i < lockedMonitorsData.length; i++) {
CompositeData cdi = lockedMonitorsData[i];
monitors[i] = MonitorInfo.from(cdi);
}
return monitors;
}
public LockInfo[] lockedSynchronizers() {
CompositeData[] lockedSyncsData =
(CompositeData[]) cdata.get(LOCKED_SYNCS);
// The LockedSynchronizers item cannot be null, but if it is we will
// get a NullPointerException when we ask for its length.
LockInfo[] locks = new LockInfo[lockedSyncsData.length];
for (int i = 0; i < lockedSyncsData.length; i++) {
CompositeData cdi = lockedSyncsData[i];
locks[i] = LockInfo.from(cdi);
}
return locks;
}
/** Validate if the input CompositeData has the expected
* CompositeType (i.e. contain all attributes with expected
* names and types).
*/
public static void validateCompositeData(CompositeData cd) {
if (cd == null) {
throw new NullPointerException("Null CompositeData");
}
CompositeType type = cd.getCompositeType();
boolean currentVersion = true;
if (!isTypeMatched(threadInfoCompositeType, type)) {
currentVersion = false;
// check if cd is an older version
if (!isTypeMatched(threadInfoV5CompositeType, type) &&
!isTypeMatched(threadInfoV6CompositeType, type)) {
throw new IllegalArgumentException(
"Unexpected composite type for ThreadInfo");
}
}
CompositeData[] stackTraceData =
(CompositeData[]) cd.get(STACK_TRACE);
if (stackTraceData == null) {
throw new IllegalArgumentException(
"StackTraceElement[] is missing");
}
if (stackTraceData.length > 0) {
StackTraceElementCompositeData.validateCompositeData(stackTraceData[0]);
}
// validate v6 attributes
if (currentVersion) {
CompositeData li = (CompositeData) cd.get(LOCK_INFO);
if (li != null) {
if (!isTypeMatched(lockInfoCompositeType,
li.getCompositeType())) {
throw new IllegalArgumentException(
"Unexpected composite type for \"" +
LOCK_INFO + "\" attribute.");
}
}
CompositeData[] lms = (CompositeData[]) cd.get(LOCKED_MONITORS);
if (lms == null) {
throw new IllegalArgumentException("MonitorInfo[] is null");
}
if (lms.length > 0) {
MonitorInfoCompositeData.validateCompositeData(lms[0]);
}
CompositeData[] lsyncs = (CompositeData[]) cd.get(LOCKED_SYNCS);
if (lsyncs == null) {
throw new IllegalArgumentException("LockInfo[] is null");
}
if (lsyncs.length > 0) {
if (!isTypeMatched(lockInfoCompositeType,
lsyncs[0].getCompositeType())) {
throw new IllegalArgumentException(
"Unexpected composite type for \"" +
LOCKED_SYNCS + "\" attribute.");
}
}
}
}
private static final long serialVersionUID = 2464378539119753175L;
}