| /* |
| * Copyright (c) 2003, 2008, 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.lang.management; |
| |
| import javax.management.openmbean.CompositeData; |
| import sun.management.ManagementFactoryHelper; |
| import sun.management.ThreadInfoCompositeData; |
| import static java.lang.Thread.State.*; |
| |
| /** |
| * Thread information. <tt>ThreadInfo</tt> contains the information |
| * about a thread including: |
| * <h4>General thread information</h4> |
| * <ul> |
| * <li>Thread ID.</li> |
| * <li>Name of the thread.</li> |
| * </ul> |
| * |
| * <h4>Execution information</h4> |
| * <ul> |
| * <li>Thread state.</li> |
| * <li>The object upon which the thread is blocked due to: |
| * <ul> |
| * <li>waiting to enter a synchronization block/method, or</li> |
| * <li>waiting to be notified in a {@link Object#wait Object.wait} method, |
| * or</li> |
| * <li>parking due to a {@link java.util.concurrent.locks.LockSupport#park |
| * LockSupport.park} call.</li> |
| * </ul> |
| * </li> |
| * <li>The ID of the thread that owns the object |
| * that the thread is blocked.</li> |
| * <li>Stack trace of the thread.</li> |
| * <li>List of object monitors locked by the thread.</li> |
| * <li>List of <a href="LockInfo.html#OwnableSynchronizer"> |
| * ownable synchronizers</a> locked by the thread.</li> |
| * </ul> |
| * |
| * <h4><a name="SyncStats">Synchronization Statistics</a></h4> |
| * <ul> |
| * <li>The number of times that the thread has blocked for |
| * synchronization or waited for notification.</li> |
| * <li>The accumulated elapsed time that the thread has blocked |
| * for synchronization or waited for notification |
| * since {@link ThreadMXBean#setThreadContentionMonitoringEnabled |
| * thread contention monitoring} |
| * was enabled. Some Java virtual machine implementation |
| * may not support this. The |
| * {@link ThreadMXBean#isThreadContentionMonitoringSupported()} |
| * method can be used to determine if a Java virtual machine |
| * supports this.</li> |
| * </ul> |
| * |
| * <p>This thread information class is designed for use in monitoring of |
| * the system, not for synchronization control. |
| * |
| * <h4>MXBean Mapping</h4> |
| * <tt>ThreadInfo</tt> is mapped to a {@link CompositeData CompositeData} |
| * with attributes as specified in |
| * the {@link #from from} method. |
| * |
| * @see ThreadMXBean#getThreadInfo |
| * @see ThreadMXBean#dumpAllThreads |
| * |
| * @author Mandy Chung |
| * @since 1.5 |
| */ |
| |
| public class ThreadInfo { |
| private String threadName; |
| private long threadId; |
| private long blockedTime; |
| private long blockedCount; |
| private long waitedTime; |
| private long waitedCount; |
| private LockInfo lock; |
| private String lockName; |
| private long lockOwnerId; |
| private String lockOwnerName; |
| private boolean inNative; |
| private boolean suspended; |
| private Thread.State threadState; |
| private StackTraceElement[] stackTrace; |
| private MonitorInfo[] lockedMonitors; |
| private LockInfo[] lockedSynchronizers; |
| |
| private static MonitorInfo[] EMPTY_MONITORS = new MonitorInfo[0]; |
| private static LockInfo[] EMPTY_SYNCS = new LockInfo[0]; |
| |
| /** |
| * Constructor of ThreadInfo created by the JVM |
| * |
| * @param t Thread |
| * @param state Thread state |
| * @param lockObj Object on which the thread is blocked |
| * @param lockOwner the thread holding the lock |
| * @param blockedCount Number of times blocked to enter a lock |
| * @param blockedTime Approx time blocked to enter a lock |
| * @param waitedCount Number of times waited on a lock |
| * @param waitedTime Approx time waited on a lock |
| * @param stackTrace Thread stack trace |
| */ |
| private ThreadInfo(Thread t, int state, Object lockObj, Thread lockOwner, |
| long blockedCount, long blockedTime, |
| long waitedCount, long waitedTime, |
| StackTraceElement[] stackTrace) { |
| initialize(t, state, lockObj, lockOwner, |
| blockedCount, blockedTime, |
| waitedCount, waitedTime, stackTrace, |
| EMPTY_MONITORS, EMPTY_SYNCS); |
| } |
| |
| /** |
| * Constructor of ThreadInfo created by the JVM |
| * for {@link ThreadMXBean#getThreadInfo(long[],boolean,boolean)} |
| * and {@link ThreadMXBean#dumpAllThreads} |
| * |
| * @param t Thread |
| * @param state Thread state |
| * @param lockObj Object on which the thread is blocked |
| * @param lockOwner the thread holding the lock |
| * @param blockedCount Number of times blocked to enter a lock |
| * @param blockedTime Approx time blocked to enter a lock |
| * @param waitedCount Number of times waited on a lock |
| * @param waitedTime Approx time waited on a lock |
| * @param stackTrace Thread stack trace |
| * @param lockedMonitors List of locked monitors |
| * @param lockedSynchronizers List of locked synchronizers |
| */ |
| private ThreadInfo(Thread t, int state, Object lockObj, Thread lockOwner, |
| long blockedCount, long blockedTime, |
| long waitedCount, long waitedTime, |
| StackTraceElement[] stackTrace, |
| Object[] monitors, |
| int[] stackDepths, |
| Object[] synchronizers) { |
| int numMonitors = (monitors == null ? 0 : monitors.length); |
| MonitorInfo[] lockedMonitors; |
| if (numMonitors == 0) { |
| lockedMonitors = EMPTY_MONITORS; |
| } else { |
| lockedMonitors = new MonitorInfo[numMonitors]; |
| for (int i = 0; i < numMonitors; i++) { |
| Object lock = monitors[i]; |
| String className = lock.getClass().getName(); |
| int identityHashCode = System.identityHashCode(lock); |
| int depth = stackDepths[i]; |
| StackTraceElement ste = (depth >= 0 ? stackTrace[depth] |
| : null); |
| lockedMonitors[i] = new MonitorInfo(className, |
| identityHashCode, |
| depth, |
| ste); |
| } |
| } |
| |
| int numSyncs = (synchronizers == null ? 0 : synchronizers.length); |
| LockInfo[] lockedSynchronizers; |
| if (numSyncs == 0) { |
| lockedSynchronizers = EMPTY_SYNCS; |
| } else { |
| lockedSynchronizers = new LockInfo[numSyncs]; |
| for (int i = 0; i < numSyncs; i++) { |
| Object lock = synchronizers[i]; |
| String className = lock.getClass().getName(); |
| int identityHashCode = System.identityHashCode(lock); |
| lockedSynchronizers[i] = new LockInfo(className, |
| identityHashCode); |
| } |
| } |
| |
| initialize(t, state, lockObj, lockOwner, |
| blockedCount, blockedTime, |
| waitedCount, waitedTime, stackTrace, |
| lockedMonitors, lockedSynchronizers); |
| } |
| |
| /** |
| * Initialize ThreadInfo object |
| * |
| * @param t Thread |
| * @param state Thread state |
| * @param lockObj Object on which the thread is blocked |
| * @param lockOwner the thread holding the lock |
| * @param blockedCount Number of times blocked to enter a lock |
| * @param blockedTime Approx time blocked to enter a lock |
| * @param waitedCount Number of times waited on a lock |
| * @param waitedTime Approx time waited on a lock |
| * @param stackTrace Thread stack trace |
| * @param lockedMonitors List of locked monitors |
| * @param lockedSynchronizers List of locked synchronizers |
| */ |
| private void initialize(Thread t, int state, Object lockObj, Thread lockOwner, |
| long blockedCount, long blockedTime, |
| long waitedCount, long waitedTime, |
| StackTraceElement[] stackTrace, |
| MonitorInfo[] lockedMonitors, |
| LockInfo[] lockedSynchronizers) { |
| this.threadId = t.getId(); |
| this.threadName = t.getName(); |
| this.threadState = ManagementFactoryHelper.toThreadState(state); |
| this.suspended = ManagementFactoryHelper.isThreadSuspended(state); |
| this.inNative = ManagementFactoryHelper.isThreadRunningNative(state); |
| this.blockedCount = blockedCount; |
| this.blockedTime = blockedTime; |
| this.waitedCount = waitedCount; |
| this.waitedTime = waitedTime; |
| |
| if (lockObj == null) { |
| this.lock = null; |
| this.lockName = null; |
| } else { |
| this.lock = new LockInfo(lockObj); |
| this.lockName = |
| lock.getClassName() + '@' + |
| Integer.toHexString(lock.getIdentityHashCode()); |
| } |
| if (lockOwner == null) { |
| this.lockOwnerId = -1; |
| this.lockOwnerName = null; |
| } else { |
| this.lockOwnerId = lockOwner.getId(); |
| this.lockOwnerName = lockOwner.getName(); |
| } |
| if (stackTrace == null) { |
| this.stackTrace = NO_STACK_TRACE; |
| } else { |
| this.stackTrace = stackTrace; |
| } |
| this.lockedMonitors = lockedMonitors; |
| this.lockedSynchronizers = lockedSynchronizers; |
| } |
| |
| /* |
| * Constructs a <tt>ThreadInfo</tt> object from a |
| * {@link CompositeData CompositeData}. |
| */ |
| private ThreadInfo(CompositeData cd) { |
| ThreadInfoCompositeData ticd = ThreadInfoCompositeData.getInstance(cd); |
| |
| threadId = ticd.threadId(); |
| threadName = ticd.threadName(); |
| blockedTime = ticd.blockedTime(); |
| blockedCount = ticd.blockedCount(); |
| waitedTime = ticd.waitedTime(); |
| waitedCount = ticd.waitedCount(); |
| lockName = ticd.lockName(); |
| lockOwnerId = ticd.lockOwnerId(); |
| lockOwnerName = ticd.lockOwnerName(); |
| threadState = ticd.threadState(); |
| suspended = ticd.suspended(); |
| inNative = ticd.inNative(); |
| stackTrace = ticd.stackTrace(); |
| |
| // 6.0 attributes |
| if (ticd.isCurrentVersion()) { |
| lock = ticd.lockInfo(); |
| lockedMonitors = ticd.lockedMonitors(); |
| lockedSynchronizers = ticd.lockedSynchronizers(); |
| } else { |
| // lockInfo is a new attribute added in 1.6 ThreadInfo |
| // If cd is a 5.0 version, construct the LockInfo object |
| // from the lockName value. |
| if (lockName != null) { |
| String result[] = lockName.split("@"); |
| if (result.length == 2) { |
| int identityHashCode = Integer.parseInt(result[1], 16); |
| lock = new LockInfo(result[0], identityHashCode); |
| } else { |
| assert result.length == 2; |
| lock = null; |
| } |
| } else { |
| lock = null; |
| } |
| lockedMonitors = EMPTY_MONITORS; |
| lockedSynchronizers = EMPTY_SYNCS; |
| } |
| } |
| |
| /** |
| * Returns the ID of the thread associated with this <tt>ThreadInfo</tt>. |
| * |
| * @return the ID of the associated thread. |
| */ |
| public long getThreadId() { |
| return threadId; |
| } |
| |
| /** |
| * Returns the name of the thread associated with this <tt>ThreadInfo</tt>. |
| * |
| * @return the name of the associated thread. |
| */ |
| public String getThreadName() { |
| return threadName; |
| } |
| |
| /** |
| * Returns the state of the thread associated with this <tt>ThreadInfo</tt>. |
| * |
| * @return <tt>Thread.State</tt> of the associated thread. |
| */ |
| public Thread.State getThreadState() { |
| return threadState; |
| } |
| |
| /** |
| * Returns the approximate accumulated elapsed time (in milliseconds) |
| * that the thread associated with this <tt>ThreadInfo</tt> |
| * has blocked to enter or reenter a monitor |
| * since thread contention monitoring is enabled. |
| * I.e. the total accumulated time the thread has been in the |
| * {@link java.lang.Thread.State#BLOCKED BLOCKED} state since thread |
| * contention monitoring was last enabled. |
| * This method returns <tt>-1</tt> if thread contention monitoring |
| * is disabled. |
| * |
| * <p>The Java virtual machine may measure the time with a high |
| * resolution timer. This statistic is reset when |
| * the thread contention monitoring is reenabled. |
| * |
| * @return the approximate accumulated elapsed time in milliseconds |
| * that a thread entered the <tt>BLOCKED</tt> state; |
| * <tt>-1</tt> if thread contention monitoring is disabled. |
| * |
| * @throws java.lang.UnsupportedOperationException if the Java |
| * virtual machine does not support this operation. |
| * |
| * @see ThreadMXBean#isThreadContentionMonitoringSupported |
| * @see ThreadMXBean#setThreadContentionMonitoringEnabled |
| */ |
| public long getBlockedTime() { |
| return blockedTime; |
| } |
| |
| /** |
| * Returns the total number of times that |
| * the thread associated with this <tt>ThreadInfo</tt> |
| * blocked to enter or reenter a monitor. |
| * I.e. the number of times a thread has been in the |
| * {@link java.lang.Thread.State#BLOCKED BLOCKED} state. |
| * |
| * @return the total number of times that the thread |
| * entered the <tt>BLOCKED</tt> state. |
| */ |
| public long getBlockedCount() { |
| return blockedCount; |
| } |
| |
| /** |
| * Returns the approximate accumulated elapsed time (in milliseconds) |
| * that the thread associated with this <tt>ThreadInfo</tt> |
| * has waited for notification |
| * since thread contention monitoring is enabled. |
| * I.e. the total accumulated time the thread has been in the |
| * {@link java.lang.Thread.State#WAITING WAITING} |
| * or {@link java.lang.Thread.State#TIMED_WAITING TIMED_WAITING} state |
| * since thread contention monitoring is enabled. |
| * This method returns <tt>-1</tt> if thread contention monitoring |
| * is disabled. |
| * |
| * <p>The Java virtual machine may measure the time with a high |
| * resolution timer. This statistic is reset when |
| * the thread contention monitoring is reenabled. |
| * |
| * @return the approximate accumulated elapsed time in milliseconds |
| * that a thread has been in the <tt>WAITING</tt> or |
| * <tt>TIMED_WAITING</tt> state; |
| * <tt>-1</tt> if thread contention monitoring is disabled. |
| * |
| * @throws java.lang.UnsupportedOperationException if the Java |
| * virtual machine does not support this operation. |
| * |
| * @see ThreadMXBean#isThreadContentionMonitoringSupported |
| * @see ThreadMXBean#setThreadContentionMonitoringEnabled |
| */ |
| public long getWaitedTime() { |
| return waitedTime; |
| } |
| |
| /** |
| * Returns the total number of times that |
| * the thread associated with this <tt>ThreadInfo</tt> |
| * waited for notification. |
| * I.e. the number of times that a thread has been |
| * in the {@link java.lang.Thread.State#WAITING WAITING} |
| * or {@link java.lang.Thread.State#TIMED_WAITING TIMED_WAITING} state. |
| * |
| * @return the total number of times that the thread |
| * was in the <tt>WAITING</tt> or <tt>TIMED_WAITING</tt> state. |
| */ |
| public long getWaitedCount() { |
| return waitedCount; |
| } |
| |
| /** |
| * Returns the <tt>LockInfo</tt> of an object for which |
| * the thread associated with this <tt>ThreadInfo</tt> |
| * is blocked waiting. |
| * A thread can be blocked waiting for one of the following: |
| * <ul> |
| * <li>an object monitor to be acquired for entering or reentering |
| * a synchronization block/method. |
| * <br>The thread is in the {@link java.lang.Thread.State#BLOCKED BLOCKED} |
| * state waiting to enter the <tt>synchronized</tt> statement |
| * or method. |
| * <p></li> |
| * <li>an object monitor to be notified by another thread. |
| * <br>The thread is in the {@link java.lang.Thread.State#WAITING WAITING} |
| * or {@link java.lang.Thread.State#TIMED_WAITING TIMED_WAITING} state |
| * due to a call to the {@link Object#wait Object.wait} method. |
| * <p></li> |
| * <li>a synchronization object responsible for the thread parking. |
| * <br>The thread is in the {@link java.lang.Thread.State#WAITING WAITING} |
| * or {@link java.lang.Thread.State#TIMED_WAITING TIMED_WAITING} state |
| * due to a call to the |
| * {@link java.util.concurrent.locks.LockSupport#park(Object) |
| * LockSupport.park} method. The synchronization object |
| * is the object returned from |
| * {@link java.util.concurrent.locks.LockSupport#getBlocker |
| * LockSupport.getBlocker} method. Typically it is an |
| * <a href="LockInfo.html#OwnableSynchronizer"> ownable synchronizer</a> |
| * or a {@link java.util.concurrent.locks.Condition Condition}.</li> |
| * </ul> |
| * |
| * <p>This method returns <tt>null</tt> if the thread is not in any of |
| * the above conditions. |
| * |
| * @return <tt>LockInfo</tt> of an object for which the thread |
| * is blocked waiting if any; <tt>null</tt> otherwise. |
| * @since 1.6 |
| */ |
| public LockInfo getLockInfo() { |
| return lock; |
| } |
| |
| /** |
| * Returns the {@link LockInfo#toString string representation} |
| * of an object for which the thread associated with this |
| * <tt>ThreadInfo</tt> is blocked waiting. |
| * This method is equivalent to calling: |
| * <blockquote> |
| * <pre> |
| * getLockInfo().toString() |
| * </pre></blockquote> |
| * |
| * <p>This method will return <tt>null</tt> if this thread is not blocked |
| * waiting for any object or if the object is not owned by any thread. |
| * |
| * @return the string representation of the object on which |
| * the thread is blocked if any; |
| * <tt>null</tt> otherwise. |
| * |
| * @see #getLockInfo |
| */ |
| public String getLockName() { |
| return lockName; |
| } |
| |
| /** |
| * Returns the ID of the thread which owns the object |
| * for which the thread associated with this <tt>ThreadInfo</tt> |
| * is blocked waiting. |
| * This method will return <tt>-1</tt> if this thread is not blocked |
| * waiting for any object or if the object is not owned by any thread. |
| * |
| * @return the thread ID of the owner thread of the object |
| * this thread is blocked on; |
| * <tt>-1</tt> if this thread is not blocked |
| * or if the object lis not owned by any thread. |
| * |
| * @see #getLockInfo |
| */ |
| public long getLockOwnerId() { |
| return lockOwnerId; |
| } |
| |
| /** |
| * Returns the name of the thread which owns the object |
| * for which the thread associated with this <tt>ThreadInfo</tt> |
| * is blocked waiting. |
| * This method will return <tt>null</tt> if this thread is not blocked |
| * waiting for any object or if the object is not owned by any thread. |
| * |
| * @return the name of the thread that owns the object |
| * this thread is blocked on; |
| * <tt>null</tt> if this thread is not blocked |
| * or if the object is not owned by any thread. |
| * |
| * @see #getLockInfo |
| */ |
| public String getLockOwnerName() { |
| return lockOwnerName; |
| } |
| |
| /** |
| * Returns the stack trace of the thread |
| * associated with this <tt>ThreadInfo</tt>. |
| * If no stack trace was requested for this thread info, this method |
| * will return a zero-length array. |
| * If the returned array is of non-zero length then the first element of |
| * the array represents the top of the stack, which is the most recent |
| * method invocation in the sequence. The last element of the array |
| * represents the bottom of the stack, which is the least recent method |
| * invocation in the sequence. |
| * |
| * <p>Some Java virtual machines may, under some circumstances, omit one |
| * or more stack frames from the stack trace. In the extreme case, |
| * a virtual machine that has no stack trace information concerning |
| * the thread associated with this <tt>ThreadInfo</tt> |
| * is permitted to return a zero-length array from this method. |
| * |
| * @return an array of <tt>StackTraceElement</tt> objects of the thread. |
| */ |
| public StackTraceElement[] getStackTrace() { |
| return stackTrace; |
| } |
| |
| /** |
| * Tests if the thread associated with this <tt>ThreadInfo</tt> |
| * is suspended. This method returns <tt>true</tt> if |
| * {@link Thread#suspend} has been called. |
| * |
| * @return <tt>true</tt> if the thread is suspended; |
| * <tt>false</tt> otherwise. |
| */ |
| public boolean isSuspended() { |
| return suspended; |
| } |
| |
| /** |
| * Tests if the thread associated with this <tt>ThreadInfo</tt> |
| * is executing native code via the Java Native Interface (JNI). |
| * The JNI native code does not include |
| * the virtual machine support code or the compiled native |
| * code generated by the virtual machine. |
| * |
| * @return <tt>true</tt> if the thread is executing native code; |
| * <tt>false</tt> otherwise. |
| */ |
| public boolean isInNative() { |
| return inNative; |
| } |
| |
| /** |
| * Returns a string representation of this thread info. |
| * The format of this string depends on the implementation. |
| * The returned string will typically include |
| * the {@linkplain #getThreadName thread name}, |
| * the {@linkplain #getThreadId thread ID}, |
| * its {@linkplain #getThreadState state}, |
| * and a {@linkplain #getStackTrace stack trace} if any. |
| * |
| * @return a string representation of this thread info. |
| */ |
| public String toString() { |
| StringBuilder sb = new StringBuilder("\"" + getThreadName() + "\"" + |
| " Id=" + getThreadId() + " " + |
| getThreadState()); |
| if (getLockName() != null) { |
| sb.append(" on " + getLockName()); |
| } |
| if (getLockOwnerName() != null) { |
| sb.append(" owned by \"" + getLockOwnerName() + |
| "\" Id=" + getLockOwnerId()); |
| } |
| if (isSuspended()) { |
| sb.append(" (suspended)"); |
| } |
| if (isInNative()) { |
| sb.append(" (in native)"); |
| } |
| sb.append('\n'); |
| int i = 0; |
| for (; i < stackTrace.length && i < MAX_FRAMES; i++) { |
| StackTraceElement ste = stackTrace[i]; |
| sb.append("\tat " + ste.toString()); |
| sb.append('\n'); |
| if (i == 0 && getLockInfo() != null) { |
| Thread.State ts = getThreadState(); |
| switch (ts) { |
| case BLOCKED: |
| sb.append("\t- blocked on " + getLockInfo()); |
| sb.append('\n'); |
| break; |
| case WAITING: |
| sb.append("\t- waiting on " + getLockInfo()); |
| sb.append('\n'); |
| break; |
| case TIMED_WAITING: |
| sb.append("\t- waiting on " + getLockInfo()); |
| sb.append('\n'); |
| break; |
| default: |
| } |
| } |
| |
| for (MonitorInfo mi : lockedMonitors) { |
| if (mi.getLockedStackDepth() == i) { |
| sb.append("\t- locked " + mi); |
| sb.append('\n'); |
| } |
| } |
| } |
| if (i < stackTrace.length) { |
| sb.append("\t..."); |
| sb.append('\n'); |
| } |
| |
| LockInfo[] locks = 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(); |
| } |
| private static final int MAX_FRAMES = 8; |
| |
| /** |
| * Returns a <tt>ThreadInfo</tt> object represented by the |
| * given <tt>CompositeData</tt>. |
| * The given <tt>CompositeData</tt> must contain the following attributes |
| * unless otherwise specified below: |
| * <blockquote> |
| * <table border> |
| * <tr> |
| * <th align=left>Attribute Name</th> |
| * <th align=left>Type</th> |
| * </tr> |
| * <tr> |
| * <td>threadId</td> |
| * <td><tt>java.lang.Long</tt></td> |
| * </tr> |
| * <tr> |
| * <td>threadName</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td>threadState</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td>suspended</td> |
| * <td><tt>java.lang.Boolean</tt></td> |
| * </tr> |
| * <tr> |
| * <td>inNative</td> |
| * <td><tt>java.lang.Boolean</tt></td> |
| * </tr> |
| * <tr> |
| * <td>blockedCount</td> |
| * <td><tt>java.lang.Long</tt></td> |
| * </tr> |
| * <tr> |
| * <td>blockedTime</td> |
| * <td><tt>java.lang.Long</tt></td> |
| * </tr> |
| * <tr> |
| * <td>waitedCount</td> |
| * <td><tt>java.lang.Long</tt></td> |
| * </tr> |
| * <tr> |
| * <td>waitedTime</td> |
| * <td><tt>java.lang.Long</tt></td> |
| * </tr> |
| * <tr> |
| * <td>lockInfo</td> |
| * <td><tt>javax.management.openmbean.CompositeData</tt> |
| * - the mapped type for {@link LockInfo} as specified in the |
| * <a href="../../../javax/management/MXBean.html#mapping-rules"> |
| * type mapping rules</a> of |
| * {@linkplain javax.management.MXBean MXBeans}. |
| * <p> |
| * If <tt>cd</tt> does not contain this attribute, |
| * the <tt>LockInfo</tt> object will be constructed from |
| * the value of the <tt>lockName</tt> attribute. </td> |
| * </tr> |
| * <tr> |
| * <td>lockName</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td>lockOwnerId</td> |
| * <td><tt>java.lang.Long</tt></td> |
| * </tr> |
| * <tr> |
| * <td>lockOwnerName</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td><a name="StackTrace">stackTrace</a></td> |
| * <td><tt>javax.management.openmbean.CompositeData[]</tt> |
| * <p> |
| * Each element is a <tt>CompositeData</tt> representing |
| * StackTraceElement containing the following attributes: |
| * <blockquote> |
| * <table cellspacing=1 cellpadding=0> |
| * <tr> |
| * <th align=left>Attribute Name</th> |
| * <th align=left>Type</th> |
| * </tr> |
| * <tr> |
| * <td>className</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td>methodName</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td>fileName</td> |
| * <td><tt>java.lang.String</tt></td> |
| * </tr> |
| * <tr> |
| * <td>lineNumber</td> |
| * <td><tt>java.lang.Integer</tt></td> |
| * </tr> |
| * <tr> |
| * <td>nativeMethod</td> |
| * <td><tt>java.lang.Boolean</tt></td> |
| * </tr> |
| * </table> |
| * </blockquote> |
| * </td> |
| * </tr> |
| * <tr> |
| * <td>lockedMonitors</td> |
| * <td><tt>javax.management.openmbean.CompositeData[]</tt> |
| * whose element type is the mapped type for |
| * {@link MonitorInfo} as specified in the |
| * {@link MonitorInfo#from Monitor.from} method. |
| * <p> |
| * If <tt>cd</tt> does not contain this attribute, |
| * this attribute will be set to an empty array. </td> |
| * </tr> |
| * <tr> |
| * <td>lockedSynchronizers</td> |
| * <td><tt>javax.management.openmbean.CompositeData[]</tt> |
| * whose element type is the mapped type for |
| * {@link LockInfo} as specified in the |
| * <a href="../../../javax/management/MXBean.html#mapping-rules"> |
| * type mapping rules</a> of |
| * {@linkplain javax.management.MXBean MXBeans}. |
| * <p> |
| * If <tt>cd</tt> does not contain this attribute, |
| * this attribute will be set to an empty array. </td> |
| * </tr> |
| * </table> |
| * </blockquote> |
| * |
| * @param cd <tt>CompositeData</tt> representing a <tt>ThreadInfo</tt> |
| * |
| * @throws IllegalArgumentException if <tt>cd</tt> does not |
| * represent a <tt>ThreadInfo</tt> with the attributes described |
| * above. |
| * |
| * @return a <tt>ThreadInfo</tt> object represented |
| * by <tt>cd</tt> if <tt>cd</tt> is not <tt>null</tt>; |
| * <tt>null</tt> otherwise. |
| */ |
| public static ThreadInfo from(CompositeData cd) { |
| if (cd == null) { |
| return null; |
| } |
| |
| if (cd instanceof ThreadInfoCompositeData) { |
| return ((ThreadInfoCompositeData) cd).getThreadInfo(); |
| } else { |
| return new ThreadInfo(cd); |
| } |
| } |
| |
| /** |
| * Returns an array of {@link MonitorInfo} objects, each of which |
| * represents an object monitor currently locked by the thread |
| * associated with this <tt>ThreadInfo</tt>. |
| * If no locked monitor was requested for this thread info or |
| * no monitor is locked by the thread, this method |
| * will return a zero-length array. |
| * |
| * @return an array of <tt>MonitorInfo</tt> objects representing |
| * the object monitors locked by the thread. |
| * |
| * @since 1.6 |
| */ |
| public MonitorInfo[] getLockedMonitors() { |
| return lockedMonitors; |
| } |
| |
| /** |
| * Returns an array of {@link LockInfo} objects, each of which |
| * represents an <a href="LockInfo.html#OwnableSynchronizer">ownable |
| * synchronizer</a> currently locked by the thread associated with |
| * this <tt>ThreadInfo</tt>. If no locked synchronizer was |
| * requested for this thread info or no synchronizer is locked by |
| * the thread, this method will return a zero-length array. |
| * |
| * @return an array of <tt>LockInfo</tt> objects representing |
| * the ownable synchronizers locked by the thread. |
| * |
| * @since 1.6 |
| */ |
| public LockInfo[] getLockedSynchronizers() { |
| // represents an <a href="LockInfo.html#OwnableSynchronizer"> |
| return lockedSynchronizers; |
| } |
| |
| private static final StackTraceElement[] NO_STACK_TRACE = |
| new StackTraceElement[0]; |
| } |
