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| <h2 title="Interface RuntimeMXBean" class="title">Interface RuntimeMXBean</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/RuntimeMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">RuntimeMXBean</a></code></dd> |
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| <dd><code><a href="internal/ExtendedRuntimeMXBeanImpl.html" title="class in com.ibm.lang.management.internal">ExtendedRuntimeMXBeanImpl</a></code></dd> |
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| <hr> |
| <pre>public interface <span class="typeNameLabel">RuntimeMXBean</span> |
| extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">RuntimeMXBean</a></pre> |
| <div class="block">The OpenJ9 extension interface for the runtime system of the virtual machine.</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Interface</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="RuntimeMXBean.VMIdleStates.html" title="enum in com.ibm.lang.management">RuntimeMXBean.VMIdleStates</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Defines the different states of <a href="#getVMIdleState()"><code>getVMIdleState()</code></a>.</div> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <th class="colLast" scope="col">Description</th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCPULoad()">getCPULoad</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a double value which holds the system load average calculated for |
| the minute preceding the call, where <i>system load average</i> is taken |
| to mean the following:</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="#getProcessID()">getProcessID</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated, for removal: This API element is subject to removal in a future version.</span> |
| <div class="deprecationComment">As of Java 10.</div> |
| </div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getVMGeneratedCPULoad()">getVMGeneratedCPULoad</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a system load average calculated over the minute preceding |
| the call averaged over the number of CPU available to Java virtual |
| machine process.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getVmId()">getVmId</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">This is provided for the benefit of applications which use attach API to load JVMTI agents |
| into their own JVMs.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="RuntimeMXBean.VMIdleStates.html" title="enum in com.ibm.lang.management">RuntimeMXBean.VMIdleStates</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getVMIdleState()">getVMIdleState</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns current JVM Idle state.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isAttachApiInitialized()">isAttachApiInitialized</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Query the state of the Attach API.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isAttachApiTerminated()">isAttachApiTerminated</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Query the state of the Attach API.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isVMIdle()">isVMIdle</a></span>()</code></th> |
| <td class="colLast"> </td> |
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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/RuntimeMXBean.html?is-external=true" title="class or interface in java.lang.management" class="externalLink" target="_blank">RuntimeMXBean</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getBootClassPath()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getBootClassPath</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getClassPath()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getClassPath</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getInputArguments()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getInputArguments</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getLibraryPath()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getLibraryPath</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getManagementSpecVersion()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getManagementSpecVersion</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getName()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getName</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getPid()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getPid</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getSpecName()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getSpecName</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getSpecVendor()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getSpecVendor</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getSpecVersion()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getSpecVersion</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getStartTime()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getStartTime</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getSystemProperties()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getSystemProperties</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getUptime()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getUptime</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getVmName()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getVmName</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getVmVendor()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getVmVendor</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getVmVersion()" title="class or interface in java.lang.management" class="externalLink" target="_blank">getVmVersion</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#isBootClassPathSupported()" title="class or interface in java.lang.management" class="externalLink" target="_blank">isBootClassPathSupported</a></code></li> |
| </ul> |
| </li> |
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| </section> |
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| <a id="getCPULoad()"> |
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| </a> |
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| <h4>getCPULoad</h4> |
| <pre class="methodSignature">double getCPULoad()</pre> |
| <div class="block">Returns a double value which holds the system load average calculated for |
| the minute preceding the call, where <i>system load average</i> is taken |
| to mean the following: |
| <p> |
| The time-averaged value of the sum of the number of runnable entities |
| running on the available processors and the number of runnable entities |
| ready and queued to run on the available processors. The averaging |
| technique adopted can vary depending on the underlying operating system.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>normally, the system load average as a double. If the system load |
| average is not obtainable (e.g. because the calculation may |
| involve an unacceptable performance impact) then a negative value |
| is returned.</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.6</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/OperatingSystemMXBean.html?is-external=true#getSystemLoadAverage()" title="class or interface in java.lang.management" class="externalLink" target="_blank"><code>OperatingSystemMXBean.getSystemLoadAverage()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getProcessID()"> |
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| </a> |
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| <h4>getProcessID</h4> |
| <pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">@Deprecated</a>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Deprecated.html?is-external=true#forRemoval()" title="class or interface in java.lang" class="externalLink" target="_blank">forRemoval</a>=true, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Deprecated.html?is-external=true#since()" title="class or interface in java.lang" class="externalLink" target="_blank">since</a>="10") |
| long getProcessID()</pre> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated, for removal: This API element is subject to removal in a future version.</span> |
| <div class="deprecationComment">As of Java 10. Use |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/RuntimeMXBean.html?is-external=true#getPid()" title="class or interface in java.lang.management" class="externalLink" target="_blank"><code>getPid()</code></a> instead.</div> |
| </div> |
| <div class="block">Returns the native process identifier that identifies the current |
| Java process to the operating system. The value is prone to being |
| recycled over a period of time, as considered suitable by the |
| operating system.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A long representing the process ID (pid) on the underlying |
| operating system.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getVMGeneratedCPULoad()"> |
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| </a> |
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| <h4>getVMGeneratedCPULoad</h4> |
| <pre class="methodSignature">double getVMGeneratedCPULoad()</pre> |
| <div class="block">Returns a system load average calculated over the minute preceding |
| the call averaged over the number of CPU available to Java virtual |
| machine process.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A double indicating the average system load per processor. |
| If the system load average is not available, it returns a negative |
| value to indicate this.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getVMIdleState()"> |
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| <h4>getVMIdleState</h4> |
| <pre class="methodSignature"><a href="RuntimeMXBean.VMIdleStates.html" title="enum in com.ibm.lang.management">RuntimeMXBean.VMIdleStates</a> getVMIdleState()</pre> |
| <div class="block">Returns current JVM Idle state.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>JVM idle state value - i.e active / idle</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="isVMIdle()"> |
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| </a> |
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| <h4>isVMIdle</h4> |
| <pre class="methodSignature">boolean isVMIdle()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if JVM state is idle. Otherwise returns false</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="isAttachApiInitialized()"> |
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| </a> |
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| <h4>isAttachApiInitialized</h4> |
| <pre class="methodSignature">boolean isAttachApiInitialized()</pre> |
| <div class="block">Query the state of the Attach API. Return false if the Attach API is: |
| - still initializing |
| - disabled |
| - terminated by VM shutdown</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if Attach API is initialized</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.8</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="isAttachApiTerminated()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>isAttachApiTerminated</h4> |
| <pre class="methodSignature">boolean isAttachApiTerminated()</pre> |
| <div class="block">Query the state of the Attach API. Return true if the Attach API is: |
| - disabled |
| - terminated by VM shutdown |
| and false if it is |
| - still initializing |
| - initialized and running</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if Attach API is terminated</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.8</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getVmId()"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getVmId</h4> |
| <pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a> getVmId()</pre> |
| <div class="block">This is provided for the benefit of applications which use attach API to load JVMTI agents |
| into their own JVMs.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Attach API Virtual Machine ID of this VM</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.8</dd> |
| </dl> |
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