Question

我正在尝试更改Catalina / Connector / 8009 / *连接器中proxyName的值。问题是我在尝试查找MBean名称时遇到以下异常。

btn1.Attributes.Add("onclick", "return false;");

脚本是：

Exception in thread "main" java.lang.ClassCastException: Cannot cast java.lang.String to javax.management.QueryExp
        at java.lang.invoke.MethodHandleImpl.newClassCastException(MethodHandleImpl.java:361)
        at java.lang.invoke.MethodHandleImpl.castReference(MethodHandleImpl.java:356)
        at jdk.nashorn.internal.scripts.Script$jmx_test_jjs.:program(jmx-test.jjs:32)
        at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:636)
        at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:229)
        at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:387)
        at jdk.nashorn.tools.Shell.apply(Shell.java:394)
        at jdk.nashorn.tools.Shell.runScripts(Shell.java:323)
        at jdk.nashorn.tools.Shell.run(Shell.java:169)
        at jdk.nashorn.tools.Shell.main(Shell.java:133)
        at jdk.nashorn.tools.Shell.main(Shell.java:112)

问题是我不知道如何在MBeanServerConnection接口的queryNames（）方法中发送Java #! /usr/java/jdk1.8.0_25/bin/jjs var host="jmxremotehost" var port=7091 var serviceURL = "service:jmx:rmi:///jndi/rmi://" + host + ":" + port + "/jmxrmi" var url = new javax.management.remote.JMXServiceURL(serviceURL); var stringArrayType = Java.type("java.lang.String[]") var credentials = new stringArrayType(2) credentials[0]="jmxuser" credentials[1]="jmxpassword" var HashMapType = Java.type("java.util.HashMap") var environment = new HashMapType() environment.put("jmx.remote.credentials",credentials) var connector = javax.management.remote.JMXConnectorFactory.connect(url,environment) var mbeanServerConnection=connector.getMBeanServerConnection() var ObjectNameType = Java.type("javax.management.ObjectName") objectName = new ObjectNameType('Catalina:type=Connector,port=8009,*') print(mbeanServerConnection.queryNames(objectName, "proxyName"), null)或其他有效的第二个参数。请参阅：http://docs.oracle.com/javase/7/docs/api/javax/management/MBeanServerConnection.html#queryMBeans%28javax.management.ObjectName,%20javax.management.QueryExp%29

Answer 1

只使用 null 对我有用：

print(mbeanServerConnection.queryNames(objectName, null), null)

我稍微调整了脚本，并使用平台MBeanServer节省了一些时间：

#! /usr/lib/jvm/jdk1.8.0_45/bin/jjs
var mbeanServerConnection=java.lang.management.ManagementFactory.getPlatformMBeanServer();
var ObjectNameType = Java.type("javax.management.ObjectName")
objectName = new ObjectNameType('*:*')
print(mbeanServerConnection.queryNames(objectName, null), null)

输出结果为：

[java.lang中：类型=记忆池，名字=元空间， java.lang：type = MemoryPool，name = PS Old Gen， java.lang：type = GarbageCollector，name = PS Scavenge， java.lang：type = MemoryPool，name = PS Eden Space， JMImplementation：type = MBeanServerDelegate，java.lang：type = Runtime， java.lang：type = Threading，java.lang：type = OperatingSystem， java.lang：type = MemoryPool，name = Code Cache， java.nio：type = BufferPool，name = direct，java.lang：type = Compilation， java.lang中：类型=的MemoryManager，名字= CodeCacheManager， java.lang：type = MemoryPool，name = Compressed Class Space， java.lang：type = Memory，java.nio：type = BufferPool，name = mapped， java.util.logging：type = Logging，java.lang：type = MemoryPool，name = PS Survivor Space，java.lang：type = ClassLoading， java.lang：type = MemoryManager，name = Metaspace Manager， com.sun.management:type=DiagnosticCommand， java.lang：type = GarbageCollector，name = PS MarkSweep， com.sun.management:type=HotSpotDiagnostic]

稍微更新的Java版本，但我不认为这是有争议的。

<强>更新

尝试与HBase服务器建立远程连接并运行模式搜索以进行更类似的测试：

#! /usr/lib/jvm/jdk1.8.0_45/bin/jjs
var host="njwmintx"
var port=10101
var serviceURL = "service:jmx:rmi:///jndi/rmi://" + host + ":" + port + "/jmxrmi"
var url = new javax.management.remote.JMXServiceURL(serviceURL);
var connector = javax.management.remote.JMXConnectorFactory.connect(url)
var mbeanServerConnection=connector.getMBeanServerConnection()
var ObjectNameType = Java.type("javax.management.ObjectName")
objectName = new ObjectNameType('Hadoop:service=HBase,name=RegionServer,*')
print(mbeanServerConnection.queryNames(objectName, null), null)

输出是：

[Hadoop的：服务= HBase的，名称= RegionServer的，分=服务器， Hadoop的：服务= HBase的，名称= RegionServer的，分=地区， Hadoop的：服务= HBase的，名称= RegionServer的，分=复制， Hadoop的：服务= HBase的，名称= RegionServer的，分= WAL]

使用Nashorn javascript jjs查找JMX MBean

1 个答案: