使用Nashorn查找JMX MBeans javascript jjs

Question

我試圖更改Catalina/Connector/8009/*連接器中的proxyName的值。問題是，在嘗試查找MBean名稱時出現以下異常。

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) 

的腳本是：

#! /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) 

的問題是，我不知道如何發送了Java null或其他任何有效的queryNames（第二個參數的MBeanServerConnection接口）方法。 見：http://docs.oracle.com/javase/7/docs/api/javax/management/MBeanServerConnection.html#queryMBeans%28javax.management.ObjectName,%20javax.management.QueryExp%29

Answer 1

只需使用空作品對我來說：

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

我修剪下來的腳本位，以及所使用的平臺MBeanServer以節省時間：

#! /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) 

的輸出是：

[java.lang：t ype = MemoryPool，name = Metaspace， java.lang：type = MemoryPool，name = PS Old Gen， java.lang：type = GarbageCollector，name = PS Scavenge， java.lang：type = MemoryPool，name = PS Eden空間， 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：type = MemoryManager，name = 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]

的較新的Java版本，但我不認爲這是在問題。

更新

試過的HBase的服務器的遠程連接和跑模式搜索一個更類似的試驗：

#! /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) 

輸出是：

[Hadoop的：服務= HBase，name = RegionServer，sub = Server， Hadoop：service = HBase，name = RegionServer，sub = Regions， Hadoop：service = HBase，名稱= RegionServer的，分=複製， 的Hadoop：服務= HBase的，名稱= RegionServer的，分= WAL]