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feat(jdk8): move files to new folder to avoid resources compiled.

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linkerlau
2025-09-07 15:25:52 +08:00
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/*
* Copyright (c) 2011, 2019, 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 com.sun.management;
import java.lang.management.ThreadInfo;
import java.util.Map;
/**
* Platform-specific management interface for the thread system
* of the Java virtual machine.
* <p>
* This platform extension is only available to a thread
* implementation that supports this extension.
*
* @author Paul Hohensee
* @since 6u25
*/
@jdk.Exported
public interface ThreadMXBean extends java.lang.management.ThreadMXBean {
/**
* Returns the total CPU time for each thread whose ID is
* in the input array {@code ids} in nanoseconds.
* The returned values are of nanoseconds precision but
* not necessarily nanoseconds accuracy.
* <p>
* This method is equivalent to calling the
* {@link ThreadMXBean#getThreadCpuTime(long)}
* method for each thread ID in the input array {@code ids} and setting the
* returned value in the corresponding element of the returned array.
*
* @param ids an array of thread IDs.
* @return an array of long values, each of which is the amount of CPU
* time the thread whose ID is in the corresponding element of the input
* array of IDs has used,
* if the thread of a specified ID exists, the thread is alive,
* and CPU time measurement is enabled;
* {@code -1} otherwise.
*
* @throws NullPointerException if {@code ids} is {@code null}
* @throws IllegalArgumentException if any element in the input array
* {@code ids} is {@code <=} {@code 0}.
* @throws UnsupportedOperationException if the Java
* virtual machine implementation does not support CPU time
* measurement.
*
* @see ThreadMXBean#getThreadCpuTime(long)
* @see #getThreadUserTime
* @see ThreadMXBean#isThreadCpuTimeSupported
* @see ThreadMXBean#isThreadCpuTimeEnabled
* @see ThreadMXBean#setThreadCpuTimeEnabled
*/
public long[] getThreadCpuTime(long[] ids);
/**
* Returns the CPU time that each thread whose ID is in the input array
* {@code ids} has executed in user mode in nanoseconds.
* The returned values are of nanoseconds precision but
* not necessarily nanoseconds accuracy.
* <p>
* This method is equivalent to calling the
* {@link ThreadMXBean#getThreadUserTime(long)}
* method for each thread ID in the input array {@code ids} and setting the
* returned value in the corresponding element of the returned array.
*
* @param ids an array of thread IDs.
* @return an array of long values, each of which is the amount of user
* mode CPU time the thread whose ID is in the corresponding element of
* the input array of IDs has used,
* if the thread of a specified ID exists, the thread is alive,
* and CPU time measurement is enabled;
* {@code -1} otherwise.
*
* @throws NullPointerException if {@code ids} is {@code null}
* @throws IllegalArgumentException if any element in the input array
* {@code ids} is {@code <=} {@code 0}.
* @throws UnsupportedOperationException if the Java
* virtual machine implementation does not support CPU time
* measurement.
*
* @see ThreadMXBean#getThreadUserTime(long)
* @see #getThreadCpuTime
* @see ThreadMXBean#isThreadCpuTimeSupported
* @see ThreadMXBean#isThreadCpuTimeEnabled
* @see ThreadMXBean#setThreadCpuTimeEnabled
*/
public long[] getThreadUserTime(long[] ids);
/**
* Returns an approximation of the total amount of memory, in bytes, allocated
* in heap memory by all threads since the Java virtual machine started.
* The returned value is an approximation because some Java virtual machine
* implementations may use object allocation mechanisms that result in a
* delay between the time an object is allocated and the time its size is
* recorded.
*
* @implSpec The default implementation throws {@code UnsupportedOperationException}
* if the Java virtual machine implementation does not support thread
* memory allocation measurement, and otherwise acts as though thread
* memory allocation measurement is disabled.
*
* @return an approximation of the total memory allocated, in bytes, in
* heap memory since the Java virtual machine was started,
* if thread memory allocation measurement is enabled;
* {@code -1} otherwise.
*
* @throws UnsupportedOperationException if the Java virtual
* machine implementation does not support thread memory allocation
* measurement.
*
* @see #isThreadAllocatedMemorySupported
* @see #isThreadAllocatedMemoryEnabled
* @see #setThreadAllocatedMemoryEnabled
*
* @since 8u412
*/
public default long getTotalThreadAllocatedBytes() {
if (!isThreadAllocatedMemorySupported()) {
throw new UnsupportedOperationException(
"Thread allocated memory measurement is not supported.");
}
return -1;
}
/**
* Returns an approximation of the total amount of memory, in bytes,
* allocated in heap memory for the current thread.
* The returned value is an approximation because some Java virtual machine
* implementations may use object allocation mechanisms that result in a
* delay between the time an object is allocated and the time its size is
* recorded.
*
* <p>
* This is a convenience method for local management use and is
* equivalent to calling:
* <blockquote><pre>
* {@link #getThreadAllocatedBytes getThreadAllocatedBytes}(Thread.currentThread().getId());
* </pre></blockquote>
*
* @return an approximation of the total memory allocated, in bytes, in
* heap memory for the current thread
* if thread memory allocation measurement is enabled;
* {@code -1} otherwise.
*
* @throws UnsupportedOperationException if the Java virtual
* machine implementation does not support thread memory allocation
* measurement.
*
* @see #isThreadAllocatedMemorySupported
* @see #isThreadAllocatedMemoryEnabled
* @see #setThreadAllocatedMemoryEnabled
*
* @since 8u282
*/
public default long getCurrentThreadAllocatedBytes() {
return getThreadAllocatedBytes(Thread.currentThread().getId());
}
/**
* Returns an approximation of the total amount of memory, in bytes,
* allocated in heap memory for the thread with the specified ID.
* The returned value is an approximation because some Java virtual machine
* implementations may use object allocation mechanisms that result in a
* delay between the time an object is allocated and the time its size is
* recorded.
* <p>
* If the thread with the specified ID is not alive or does not exist,
* this method returns {@code -1}. If thread memory allocation measurement
* is disabled, this method returns {@code -1}.
* A thread is alive if it has been started and has not yet died.
* <p>
* If thread memory allocation measurement is enabled after the thread has
* started, the Java virtual machine implementation may choose any time up
* to and including the time that the capability is enabled as the point
* where thread memory allocation measurement starts.
*
* @param id the thread ID of a thread
* @return an approximation of the total memory allocated, in bytes, in
* heap memory for the thread with the specified ID
* if the thread with the specified ID exists, the thread is alive,
* and thread memory allocation measurement is enabled;
* {@code -1} otherwise.
*
* @throws IllegalArgumentException if {@code id} {@code <=} {@code 0}.
* @throws UnsupportedOperationException if the Java virtual
* machine implementation does not support thread memory allocation
* measurement.
*
* @see #isThreadAllocatedMemorySupported
* @see #isThreadAllocatedMemoryEnabled
* @see #setThreadAllocatedMemoryEnabled
*/
public long getThreadAllocatedBytes(long id);
/**
* Returns an approximation of the total amount of memory, in bytes,
* allocated in heap memory for each thread whose ID is in the input
* array {@code ids}.
* The returned values are approximations because some Java virtual machine
* implementations may use object allocation mechanisms that result in a
* delay between the time an object is allocated and the time its size is
* recorded.
* <p>
* This method is equivalent to calling the
* {@link #getThreadAllocatedBytes(long)}
* method for each thread ID in the input array {@code ids} and setting the
* returned value in the corresponding element of the returned array.
*
* @param ids an array of thread IDs.
* @return an array of long values, each of which is an approximation of
* the total memory allocated, in bytes, in heap memory for the thread
* whose ID is in the corresponding element of the input array of IDs.
*
* @throws NullPointerException if {@code ids} is {@code null}
* @throws IllegalArgumentException if any element in the input array
* {@code ids} is {@code <=} {@code 0}.
* @throws UnsupportedOperationException if the Java virtual
* machine implementation does not support thread memory allocation
* measurement.
*
* @see #getThreadAllocatedBytes(long)
* @see #isThreadAllocatedMemorySupported
* @see #isThreadAllocatedMemoryEnabled
* @see #setThreadAllocatedMemoryEnabled
*/
public long[] getThreadAllocatedBytes(long[] ids);
/**
* Tests if the Java virtual machine implementation supports thread memory
* allocation measurement.
*
* @return
* {@code true}
* if the Java virtual machine implementation supports thread memory
* allocation measurement;
* {@code false} otherwise.
*/
public boolean isThreadAllocatedMemorySupported();
/**
* Tests if thread memory allocation measurement is enabled.
*
* @return {@code true} if thread memory allocation measurement is enabled;
* {@code false} otherwise.
*
* @throws UnsupportedOperationException if the Java virtual
* machine does not support thread memory allocation measurement.
*
* @see #isThreadAllocatedMemorySupported
*/
public boolean isThreadAllocatedMemoryEnabled();
/**
* Enables or disables thread memory allocation measurement. The default
* is platform dependent.
*
* @param enable {@code true} to enable;
* {@code false} to disable.
*
* @throws UnsupportedOperationException if the Java virtual
* machine does not support thread memory allocation measurement.
*
* @throws SecurityException if a security manager
* exists and the caller does not have
* ManagementPermission("control").
*
* @see #isThreadAllocatedMemorySupported
*/
public void setThreadAllocatedMemoryEnabled(boolean enable);
/**
* Returns the thread info for each thread whose ID
* is in the input array <tt>ids</tt>,
* with stack trace of the specified maximum number of elements
* and synchronization information.
* If <tt>maxDepth == 0</tt>, no stack trace of the thread
* will be dumped.
*
* <p>
* This method obtains a snapshot of the thread information
* for each thread including:
* <ul>
* <li>stack trace of the specified maximum number of elements,</li>
* <li>the object monitors currently locked by the thread
* if <tt>lockedMonitors</tt> is <tt>true</tt>, and</li>
* <li>the <a href="{@docRoot}/../api/java/lang/management/LockInfo.html#OwnableSynchronizer">
* ownable synchronizers</a> currently locked by the thread
* if <tt>lockedSynchronizers</tt> is <tt>true</tt>.</li>
* </ul>
* <p>
* This method returns an array of the <tt>ThreadInfo</tt> objects,
* each is the thread information about the thread with the same index
* as in the <tt>ids</tt> array.
* If a thread of the given ID is not alive or does not exist,
* <tt>null</tt> will be set in the corresponding element
* in the returned array. A thread is alive if
* it has been started and has not yet died.
* <p>
* If a thread does not lock any object monitor or <tt>lockedMonitors</tt>
* is <tt>false</tt>, the returned <tt>ThreadInfo</tt> object will have an
* empty <tt>MonitorInfo</tt> array. Similarly, if a thread does not
* lock any synchronizer or <tt>lockedSynchronizers</tt> is <tt>false</tt>,
* the returned <tt>ThreadInfo</tt> object
* will have an empty <tt>LockInfo</tt> array.
*
* <p>
* When both <tt>lockedMonitors</tt> and <tt>lockedSynchronizers</tt>
* parameters are <tt>false</tt>, it is equivalent to calling:
* <blockquote><pre>
* {@link #getThreadInfo(long[], int) getThreadInfo(ids, maxDepth)}
* </pre></blockquote>
*
* <p>
* This method is designed for troubleshooting use, but not for
* synchronization control. It might be an expensive operation.
*
* <p>
* <b>MBeanServer access</b>:<br>
* The mapped type of <tt>ThreadInfo</tt> is
* <tt>CompositeData</tt> with attributes as specified in the
* {@link ThreadInfo#from ThreadInfo.from} method.
*
* @implSpec The default implementation throws
* <tt>UnsupportedOperationException</tt>.
*
* @param ids an array of thread IDs.
* @param lockedMonitors if <tt>true</tt>, retrieves all locked monitors.
* @param lockedSynchronizers if <tt>true</tt>, retrieves all locked
* ownable synchronizers.
* @param maxDepth indicates the maximum number of
* {@link StackTraceElement} to be retrieved from the stack trace.
*
* @return an array of the {@link ThreadInfo} objects, each containing
* information about a thread whose ID is in the corresponding
* element of the input array of IDs.
*
* @throws IllegalArgumentException if <tt>maxDepth</tt> is negative.
* @throws java.lang.SecurityException if a security manager
* exists and the caller does not have
* ManagementPermission("monitor").
* @throws java.lang.UnsupportedOperationException
* <ul>
* <li>if <tt>lockedMonitors</tt> is <tt>true</tt> but
* the Java virtual machine does not support monitoring
* of {@linkplain #isObjectMonitorUsageSupported
* object monitor usage}; or</li>
* <li>if <tt>lockedSynchronizers</tt> is <tt>true</tt> but
* the Java virtual machine does not support monitoring
* of {@linkplain #isSynchronizerUsageSupported
* ownable synchronizer usage}.</li>
* </ul>
*
* @see #isObjectMonitorUsageSupported
* @see #isSynchronizerUsageSupported
*
* @since 8u282
*/
public default ThreadInfo[] getThreadInfo(long[] ids, boolean lockedMonitors,
boolean lockedSynchronizers, int maxDepth) {
throw new UnsupportedOperationException();
}
/**
* Returns the thread info for all live threads
* with stack trace of the specified maximum number of elements
* and synchronization information.
* if <tt>maxDepth == 0</tt>, no stack trace of the thread
* will be dumped.
* Some threads included in the returned array
* may have been terminated when this method returns.
*
* <p>
* This method returns an array of {@link ThreadInfo} objects
* as specified in the {@link #getThreadInfo(long[], boolean, boolean, int)}
* method.
*
* @implSpec The default implementation throws
* <tt>UnsupportedOperationException</tt>.
*
* @param lockedMonitors if <tt>true</tt>, dump all locked monitors.
* @param lockedSynchronizers if <tt>true</tt>, dump all locked
* ownable synchronizers.
* @param maxDepth indicates the maximum number of
* {@link StackTraceElement} to be retrieved from the stack trace.
*
* @return an array of {@link ThreadInfo} for all live threads.
*
* @throws IllegalArgumentException if <tt>maxDepth</tt> is negative.
* @throws java.lang.SecurityException if a security manager
* exists and the caller does not have
* ManagementPermission("monitor").
* @throws java.lang.UnsupportedOperationException
* <ul>
* <li>if <tt>lockedMonitors</tt> is <tt>true</tt> but
* the Java virtual machine does not support monitoring
* of {@linkplain #isObjectMonitorUsageSupported
* object monitor usage}; or</li>
* <li>if <tt>lockedSynchronizers</tt> is <tt>true</tt> but
* the Java virtual machine does not support monitoring
* of {@linkplain #isSynchronizerUsageSupported
* ownable synchronizer usage}.</li>
* </ul>
*
* @see #isObjectMonitorUsageSupported
* @see #isSynchronizerUsageSupported
*
* @since 8u282
*/
public default ThreadInfo[] dumpAllThreads(boolean lockedMonitors,
boolean lockedSynchronizers, int maxDepth) {
throw new UnsupportedOperationException();
}
}