Java tutorial
/* * Jopr Management Platform * Copyright (C) 2005-2008 Red Hat, Inc. * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as * published by the Free Software Foundation, and/or the GNU Lesser * General Public License, version 2.1, also as published by the Free * Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License and the GNU Lesser General Public License * for more details. * * You should have received a copy of the GNU General Public License * and the GNU Lesser General Public License along with this program; * if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ package org.rhq.plugins.jbossas; import java.io.File; import java.util.ArrayList; import java.util.Arrays; import java.util.HashSet; import java.util.List; import java.util.Set; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.management.MalformedObjectNameException; import javax.management.ObjectName; import org.apache.commons.logging.Log; import org.mc4j.ems.connection.bean.EmsBean; import org.mc4j.ems.connection.bean.attribute.EmsAttribute; import org.rhq.core.domain.configuration.Configuration; import org.rhq.core.domain.configuration.PropertySimple; import org.rhq.core.domain.measurement.DataType; import org.rhq.core.domain.measurement.MeasurementDataNumeric; import org.rhq.core.domain.measurement.MeasurementDataTrait; import org.rhq.core.domain.measurement.MeasurementReport; import org.rhq.core.domain.measurement.MeasurementScheduleRequest; import org.rhq.core.domain.resource.ResourceType; import org.rhq.core.pluginapi.configuration.ConfigurationUpdateReport; import org.rhq.core.pluginapi.inventory.CreateChildResourceFacet; import org.rhq.core.pluginapi.inventory.ResourceComponent; import org.rhq.core.pluginapi.inventory.ResourceContext; import org.rhq.plugins.jbossas.util.DeploymentUtility; import org.rhq.plugins.jbossas.util.XMLConfigurationEditor; import org.rhq.plugins.jmx.MBeanResourceComponent; /** * Common base class for Messaging related stuff * @author Heiko W. Rupp */ public abstract class AbstractMessagingComponent extends MBeanResourceComponent<JBossASServerComponent<?>> implements CreateChildResourceFacet { private static final Pattern PROPERTY_PATTERN = Pattern.compile("^(.*:.*):(.*)$"); protected static final String PLUGIN_CONFIG_NAME_PROP = "name"; private static final String MBEAN_NAME_PROP = "MBeanName"; XMLConfigurationEditor xmlEditor; ResourceType resourceType; protected String name; protected Log LOG = null; public void start(ResourceContext<JBossASServerComponent<?>> resourceContext, XMLConfigurationEditor editor) { super.start(resourceContext); this.resourceType = resourceContext.getResourceType(); xmlEditor = editor; this.name = resourceContext.getPluginConfiguration().getSimpleValue(PLUGIN_CONFIG_NAME_PROP, null); } protected void getValues(MeasurementReport report, Set<MeasurementScheduleRequest> requests, String pattern) { Set<MeasurementScheduleRequest> others = new HashSet<MeasurementScheduleRequest>(); for (MeasurementScheduleRequest request : requests) { // Handle stuff for the generic Messaging MBeans ourselves. Pass the remainder // to our parent later. if (request.getName().startsWith(pattern)) { Matcher m = PROPERTY_PATTERN.matcher(request.getName()); if (m.matches() && (m.group(1) != null)) { EmsBean eBean = getEmsConnection().getBean(m.group(1)); List<String> attributes = new ArrayList<String>(1); attributes.add(m.group(2)); eBean.refreshAttributes(attributes); EmsAttribute emsAtt = eBean.getAttribute(m.group(2)); Object value = emsAtt.getValue(); if ((request.getDataType() == DataType.MEASUREMENT) && (value instanceof Number)) { report.addData(new MeasurementDataNumeric(request, ((Number) value).doubleValue())); } else if (request.getDataType() == DataType.TRAIT) { String displayValue = null; if ((value != null) && value.getClass().isArray()) { displayValue = Arrays.deepToString((Object[]) value); } else { displayValue = String.valueOf(value); } report.addData(new MeasurementDataTrait(request, displayValue)); } } } else others.add(request); } super.getValues(report, others); } @Override public Configuration loadResourceConfiguration() { String resourceKey = getResourceContext().getResourceKey(); JBossASServerComponent jasco = getOurJBossASComponent(); File deploymentFile = jasco.getDeploymentFilePath(resourceKey); Configuration loadedConfiguration = xmlEditor.loadConfiguration(deploymentFile, this.name); if (loadedConfiguration == null) return null; String boundJNDIName = DeploymentUtility.getJndiNameBinding(getEmsBean()); loadedConfiguration.put(new PropertySimple("JNDIBinding", boundJNDIName)); return loadedConfiguration; } private JBossASServerComponent getOurJBossASComponent() { ResourceComponent parent = getResourceContext().getParentResourceComponent(); JBossASServerComponent jasco; if (parent instanceof JMSComponent) { jasco = ((JMSComponent) parent).getResourceContext().getParentResourceComponent(); } else if (parent instanceof JBossMessagingComponent) { jasco = ((JBossMessagingComponent) parent).getResourceContext().getParentResourceComponent(); } else if (parent instanceof JBossASServerComponent) { jasco = (JBossASServerComponent) parent; } else jasco = new JBossASServerComponent(); // TODO fix me return jasco; } @Override public void updateResourceConfiguration(ConfigurationUpdateReport report) { JBossASServerComponent jasco = getOurJBossASComponent(); File deploymentFile = jasco.getDeploymentFilePath(getResourceContext().getResourceKey()); // Check to see if the user is changing the name of this JMS Topic/Queue String mBeanName = report.getConfiguration().getSimpleValue(MBEAN_NAME_PROP, null); boolean mBeanNameChanged = false; if (!mBeanName.equals(this.name)) { LOG.info( "The MBEan Name for this Topic/Queue has been changed. This change will appear in the <mbean> tag for" + "this Topic/Queue."); // User has changed the name, so update the plugin configuration. PropertySimple nameProp = getResourceContext().getPluginConfiguration() .getSimple(PLUGIN_CONFIG_NAME_PROP); nameProp.setStringValue(mBeanName); mBeanNameChanged = true; } if ((deploymentFile == null) || !deploymentFile.exists()) { deploymentFile = new File(jasco.getConfigurationPath(), name + ".xml"); } xmlEditor.updateConfiguration(deploymentFile, this.name, report); if (mBeanNameChanged) { this.name = mBeanName; } } public void deleteResource() throws Exception { String resourceKey = getResourceContext().getResourceKey(); JBossASServerComponent parent = getOurJBossASComponent(); File deploymentFile = parent.getDeploymentFilePath(resourceKey); assert deploymentFile.exists() : "Deployment file " + deploymentFile + " doesn't exist for resource " + resourceKey; xmlEditor.deleteComponent(deploymentFile, this.name); parent.redeployFile(deploymentFile); } /** * Returns the canonical version of the passed ObjectName * @param objectName a valid {@link ObjectName} * @return an {@link ObjectName} in its canonical form * @throws MalformedObjectNameException if the passed {@link ObjectName} is invalid */ public String getCanonicalName(String objectName) throws MalformedObjectNameException { ObjectName on = new ObjectName(objectName); return on.getCanonicalName(); } }