Groovy JMX

由 lichiabor 创建，小路依依 最后一次修改 2016-12-12 JMX是defacto标准，用于监控与Java虚拟环境有任何关系的所有应用程序。鉴于Groovy直接位于Java之上，Groovy可以利用已经为Java实现的大量工作。监视JVM 可以使用java.lang.management中提供的标准类来执行JVM的监视。以下代码示例说明如何完成此操作。import java.lang.management.*def os = ManagementFactory.operatingSystemMXBean println """OPERATING SYSTEM: OS architecture = $os.arch OS name = $os.name OS version = $os.version OS processors = $os.availableProcessors """ def rt = ManagementFactory.runtimeMXBean println """RUNTIME: Runtime name = $rt.name Runtime spec name = $rt.specName Runtime vendor = $rt.specVendor Runtime spec version = $rt.specVersion Runtime management spec version = $rt.managementSpecVersion """ def mem = ManagementFactory.memoryMXBean def heapUsage = mem.heapMemoryUsage def nonHeapUsage = mem.nonHeapMemoryUsage println """MEMORY: HEAP STORAGE: Memory committed = $heapUsage.committed Memory init = $heapUsage.init Memory max = $heapUsage.max Memory used = $heapUsage.used NON-HEAP STORAGE: Non-heap memory committed = $nonHeapUsage.committed Non-heap memory init = $nonHeapUsage.init Non-heap memory max = $nonHeapUsage.max Non-heap memory used = $nonHeapUsage.used """ println "GARBAGE COLLECTION:" ManagementFactory.garbageCollectorMXBeans.each { gc -> println "name = $gc.name" println "collection count = $gc.collectionCount" println "collection time = $gc.collectionTime" String[] mpoolNames = gc.memoryPoolNames mpoolNames.each { mpoolName -> println "mpool name = $mpoolName" } }当代码执行时，输出将根据运行代码的系统而变化。下面给出了输出的样本。OPERATING SYSTEM: OS architecture = x86 OS name = Windows 7 OS version = 6.1 OS processors = 4 RUNTIME: Runtime name = 5144@Babuli-PC Runtime spec name = Java Virtual Machine Specification Runtime vendor = Oracle Corporation Runtime spec version = 1.7 Runtime management spec version = 1.2 MEMORY: HEAP STORAGE: Memory committed = 16252928 Memory init = 16777216 Memory max = 259522560 Memory used = 7355840 NON-HEAP STORAGE: Non-heap memory committed = 37715968 Non-heap memory init = 35815424 Non-heap memory max = 123731968 Non-heap memory used = 18532232 GARBAGE COLLECTION: name = Copy collection count = 15 collection time = 47 mpool name = Eden Space mpool name = Survivor Space name = MarkSweepCompact collection count = 0 collection time = 0 mpool name = Eden Space mpool name = Survivor Space mpool name = Tenured Gen mpool name = Perm Gen mpool name = Perm Gen [shared-ro] mpool name = Perm Gen [shared-rw]监控Tomcat为了监视tomcat，在启动tomcat时应设置以下参数 - set JAVA_OPTS = -Dcom.sun.management.jmxremote Dcom.sun.management.jmxremote.port = 9004 -Dcom.sun.management.jmxremote.authenticate=false Dcom.sun.management.jmxremote.ssl = false以下代码使用JMX发现正在运行的Tomcat中的可用MBean，确定哪些是Web模块并提取每个Web模块的处理时间。import groovy.swing.SwingBuilder import javax.management.ObjectName import javax.management.remote.JMXConnectorFactory as JmxFactory import javax.management.remote.JMXServiceURL as JmxUrl import javax.swing.WindowConstants as WC import org.jfree.chart.ChartFactory import org.jfree.data.category.DefaultCategoryDataset as Dataset import org.jfree.chart.plot.PlotOrientation as Orientation def serverUrl = 'service:jmx:rmi:///jndi/rmi://localhost:9004/jmxrmi' def server = JmxFactory.connect(new JmxUrl(serverUrl)).MBeanServerConnection def serverInfo = new GroovyMBean(server, 'Catalina:type = Server').serverInfo println "Connected to: $serverInfo" def query = new ObjectName('Catalina:*') String[] allNames = server.queryNames(query, null) def modules = allNames.findAll { name -> name.contains('j2eeType=WebModule') }.collect{ new GroovyMBean(server, it) } println "Found ${modules.size()} web modules. Processing ..." def dataset = new Dataset() modules.each { m -> println m.name() dataset.addValue m.processingTime, 0, m.path }