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Groovy example source code file (JmxTimerFactory.groovy)

This example Groovy source code file (JmxTimerFactory.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

date, date, jmxbuilder, jmxtimerfactory, management, map, node, notificationfilter, number, object, object, objectname, objectname, string, string

The Groovy JmxTimerFactory.groovy source code

/*
 * Copyright 2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package groovy.jmx.builder

import javax.management.MBeanServer
import javax.management.NotificationFilter
import javax.management.NotificationFilterSupport
import javax.management.ObjectName

/**
 * The JmxTimerFactory class generates a timer() node for JmxBuilder.  This node crates a standard JMX Timer object
 * that can be used to provide timing signals to registered JMX listeners.
 *
 * <p>Syntax

* * <pre> * timer( * name:"object name"|ObjectName(), * event:"...", * message:"...", * data:dataValue * startDate:"now"|dateValue * period:"99d"|"99h"|"99m"|"99s"|99 * occurences:long * ) * </pre> * * @author Vladimir Vivien * */ class JmxTimerFactory extends AbstractFactory { public Object newInstance(FactoryBuilderSupport builder, Object nodeName, Object nodeParam, Map nodeAttribs) { if (nodeParam) { throw new JmxBuilderException("Node '${nodeName}' only supports named attributes.") } JmxBuilder fsb = (JmxBuilder) builder javax.management.timer.Timer timer = new javax.management.timer.Timer() def metaMap = [:] metaMap.server = fsb.getMBeanServer() metaMap.timer = timer metaMap.name = nodeAttribs.remove("name") metaMap.event = nodeAttribs.remove("event") ?: nodeAttribs.remove("type") ?: "jmx.builder.event" metaMap.message = nodeAttribs.remove("message") ?: nodeAttribs.remove("msg") metaMap.data = nodeAttribs.remove("data") ?: nodeAttribs.remove("userData") metaMap.date = nodeAttribs.remove("date") ?: nodeAttribs.remove("startDate") metaMap.period = nodeAttribs.remove("period") ?: nodeAttribs.remove("frequency") metaMap.occurences = nodeAttribs.remove("occurs") ?: nodeAttribs.remove("occurences") ?: 0 // normalize data metaMap.name = getNormalizedName(fsb, timer, metaMap.name) metaMap.date = getNormalizedDate(metaMap.date) metaMap.period = getNormalizedPeriod(metaMap.period) metaMap.listeners = getNormalizedRecipientList(metaMap.listeners) def result = registerTimer(metaMap) return result } private def getNormalizedName(fsb, timer, name) { def result if (!name) { result = getDefaultName(fsb, timer) } else { if (name instanceof String) { result = new ObjectName(name) } else if (name instanceof ObjectName) { result = name } else { result = getDefaultName(fsb, time) } } return result } private def getDefaultName(fsb, timer) { def name = "${fsb.getDefaultJmxNameDomain()}:type=TimerService,name=Timer@${timer.hashCode()}" return new ObjectName(name) } private def getNormalizedDate(date) { if (!date) return new Date() if (date instanceof Date) { return date } def startDate switch (date) { case null: case "now": default: startDate = new Date() } return startDate } private def getNormalizedPeriod(period) { if (!period) return 1000L if (period instanceof Number) { return period } def result = 1000L if (period instanceof String) { def multiplier = period[-1] def value try { value = period[0..-2].toLong() } catch (e) { multiplier = "x" } switch (multiplier) { case "s": result = value * 1000 break case "m": result = value * 60 * 1000 break case "h": result = value * 60 * 60 * 1000 break case "d": result = value * 24 * 60 * 60 * 1000 break default: result = 1000L } } return result } private def getNormalizedRecipientList(list) { if (!list) return null def result = [] list.each {name -> def on if (name instanceof String) { on = new ObjectName(name) } if (name instanceof ObjectName) { on = name } result.add(on) } return result } private def registerTimer(metaMap) { def server = (MBeanServer) metaMap.server def timer = metaMap.timer timer.addNotification( metaMap.event, metaMap.message, metaMap.data, metaMap.date, metaMap.period, metaMap.occurences) if (server.isRegistered(metaMap.name)) { server.unregisterMBean metaMap.name } server.registerMBean(timer, metaMap.name) return new GroovyMBean(metaMap.server, metaMap.name) } private NotificationFilter getEventFilter(type) { def noteFilter = new NotificationFilterSupport() noteFilter.enableType type return noteFilter } public boolean onHandleNodeAttributes(FactoryBuilderSupport builder, Object node, Map nodeAttribs) { return false; } public boolean isLeaf() { return true; } public void onNodeCompleted(FactoryBuilderSupport builder, Object parentNode, Object thisNode) { if (parentNode != null) { parentNode.add(thisNode) } } }

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