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| <h2 title="Interface ThreadMXBean" class="title">Interface ThreadMXBean</h2> |
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| <dt>All Superinterfaces:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/PlatformManagedObject.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">PlatformManagedObject</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">ThreadMXBean</a></code></dd> |
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| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="internal/ExtendedThreadMXBeanImpl.html" title="class in com.ibm.lang.management.internal">ExtendedThreadMXBeanImpl</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public interface <span class="typeNameLabel">ThreadMXBean</span> |
| extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">ThreadMXBean</a></pre> |
| <div class="block">The OpenJ9 extension interface to <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank"><code>ThreadMXBean</code></a>. It publishes |
| APIs specific to <a href="package-summary.html"><code>com.ibm.lang.management</code></a>, exposing additional |
| information than what the standard ThreadMXBean does.</div> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="ExtendedThreadInfo.html" title="interface in com.ibm.lang.management">ExtendedThreadInfo</a>[]</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#dumpAllExtendedThreads(boolean,boolean)">dumpAllExtendedThreads</a></span>​(boolean lockedMonitors, |
| boolean lockedSynchronizers)</code></th> |
| <td class="colLast"> |
| <div class="block">API method that fetches an array of ExtendedThreadInfo objects corresponding to |
| threads in the virtual machine during the time it is invoked.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNativeThreadId(long)">getNativeThreadId</a></span>​(long threadId)</code></th> |
| <td class="colLast"> |
| <div class="block">Find the native (operating system assigned) thread identifiers corresponding |
| to a unique TID (as returned by java/lang/Thread.getId()).</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>long[]</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNativeThreadIds(long%5B%5D)">getNativeThreadIds</a></span>​(long[] threadIDs)</code></th> |
| <td class="colLast"> |
| <div class="block">Fetches an array of the native (operating system assigned) identifiers |
| corresponding to unique TIDs (as returned by java/lang/Thread.getId()) specified to it.</div> |
| </td> |
| </tr> |
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| <h3>Methods declared in interface java.lang.management.<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/PlatformManagedObject.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">PlatformManagedObject</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/PlatformManagedObject.html?is-external=true#getObjectName()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getObjectName</a></code></li> |
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| <h3>Methods declared in interface java.lang.management.<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">ThreadMXBean</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#dumpAllThreads(boolean,boolean)" title="class or interface in java.lang.management" class="externalLink" target="_blank">dumpAllThreads</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#dumpAllThreads(boolean,boolean,int)" title="class or interface in java.lang.management" class="externalLink" target="_blank">dumpAllThreads</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#findDeadlockedThreads()" title="class or interface in java.lang.management" class="externalLink" target="_blank">findDeadlockedThreads</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#findMonitorDeadlockedThreads()" title="class or interface in java.lang.management" class="externalLink" target="_blank">findMonitorDeadlockedThreads</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getAllThreadIds()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getAllThreadIds</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getCurrentThreadCpuTime()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getCurrentThreadCpuTime</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getCurrentThreadUserTime()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getCurrentThreadUserTime</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getDaemonThreadCount()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getDaemonThreadCount</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getPeakThreadCount()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getPeakThreadCount</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadCount()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadCount</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadCpuTime(long)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadCpuTime</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadInfo(long)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadInfo</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadInfo(long%5B%5D)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadInfo</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadInfo(long%5B%5D,boolean,boolean)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadInfo</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadInfo(long%5B%5D,boolean,boolean,int)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadInfo</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadInfo(long%5B%5D,int)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadInfo</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadInfo(long,int)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadInfo</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getThreadUserTime(long)" title="class or interface in java.lang.management" class="externalLink" target="_blank">getThreadUserTime</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#getTotalStartedThreadCount()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getTotalStartedThreadCount</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isCurrentThreadCpuTimeSupported()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isCurrentThreadCpuTimeSupported</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isObjectMonitorUsageSupported()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isObjectMonitorUsageSupported</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isSynchronizerUsageSupported()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isSynchronizerUsageSupported</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isThreadContentionMonitoringEnabled()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isThreadContentionMonitoringEnabled</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isThreadContentionMonitoringSupported()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isThreadContentionMonitoringSupported</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isThreadCpuTimeEnabled()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isThreadCpuTimeEnabled</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#isThreadCpuTimeSupported()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isThreadCpuTimeSupported</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#resetPeakThreadCount()" title="class or interface in java.lang.management" class="externalLink" target="_blank">resetPeakThreadCount</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#setThreadContentionMonitoringEnabled(boolean)" title="class or interface in java.lang.management" class="externalLink" target="_blank">setThreadContentionMonitoringEnabled</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/ThreadMXBean.html?is-external=true#setThreadCpuTimeEnabled(boolean)" title="class or interface in java.lang.management" class="externalLink" target="_blank">setThreadCpuTimeEnabled</a></code></li> |
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| <a id="getNativeThreadIds(long[])"> |
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| <h4>getNativeThreadIds</h4> |
| <pre class="methodSignature">long[] getNativeThreadIds​(long[] threadIDs) |
| throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">IllegalArgumentException</a>, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">SecurityException</a></pre> |
| <div class="block">Fetches an array of the native (operating system assigned) identifiers |
| corresponding to unique TIDs (as returned by java/lang/Thread.getId()) specified to it.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>threadIDs</code> - An array of thread identifiers that the user wishes to obtain |
| native thread identifiers for.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An array of operating system assigned native thread identifiers. If a thread among the |
| given set of IDs is no longer alive or does not exist, a -1 is set in the corresponding |
| element of the returned array.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">IllegalArgumentException</a></code> - is thrown if any of the thread identifiers passed is invalid (<=0).</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">SecurityException</a></code> - is thrown if the caller does not have sufficient permissions |
| (ManagementPermission("monitor"))</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getNativeThreadId</h4> |
| <pre class="methodSignature">long getNativeThreadId​(long threadId) |
| throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">IllegalArgumentException</a>, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">SecurityException</a></pre> |
| <div class="block">Find the native (operating system assigned) thread identifiers corresponding |
| to a unique TID (as returned by java/lang/Thread.getId()). When querying multiple threadIDs, |
| consider using getNativeThreadIds(long[]) as it is more efficient than getNativeThreadId().</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>threadId</code> - The Java runtime allocated thread identifier.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Operating system assigned native thread identifier. If the thread corresponding to the |
| ID is no longer alive or does not exist, -1 is returned.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">IllegalArgumentException</a></code> - is thrown if the thread identifier passed is invalid (<=0).</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">SecurityException</a></code> - is thrown if the caller does not have sufficient permissions |
| (ManagementPermission("monitor"))</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="dumpAllExtendedThreads(boolean,boolean)"> |
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| <h4>dumpAllExtendedThreads</h4> |
| <pre class="methodSignature"><a href="ExtendedThreadInfo.html" title="interface in com.ibm.lang.management">ExtendedThreadInfo</a>[] dumpAllExtendedThreads​(boolean lockedMonitors, |
| boolean lockedSynchronizers) |
| throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">SecurityException</a>, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">UnsupportedOperationException</a>, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/InternalError.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">InternalError</a></pre> |
| <div class="block">API method that fetches an array of ExtendedThreadInfo objects corresponding to |
| threads in the virtual machine during the time it is invoked. |
| Fetches an array of ExtendedThreadInfo objects that provide native thread |
| identifiers along with java.lang.management.ThreadInfo object representing the thread. |
| Consider using dumpAllExtendedThreads() in place of dumpAllThreads() as it provides |
| additional thread identification information in an efficient manner.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>lockedMonitors</code> - boolean indication of whether or not information on all |
| currently locked object monitors is to be included in the |
| returned array</dd> |
| <dd><code>lockedSynchronizers</code> - boolean indication of whether or not information on all |
| currently locked ownable synchronizers is to be included in |
| the returned array</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Array of ExtendedThreadInfo objects.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">SecurityException</a></code> - is thrown if the caller does not have sufficient permissions |
| (ManagementPermission("monitor"))</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">UnsupportedOperationException</a></code> - is thrown if the JVM does not support monitoring |
| object monitor usage or ownable synchronizer usage, even as it has been specified.</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/InternalError.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">InternalError</a></code> - is thrown in case an error occurs while fetching thread information, |
| typically, an internal error resulting from an inconsistency in the class library.</dd> |
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