Java tutorial
/* * NOTE: This copyright does *not* cover user programs that use HQ * program services by normal system calls through the application * program interfaces provided as part of the Hyperic Plug-in Development * Kit or the Hyperic Client Development Kit - this is merely considered * normal use of the program, and does *not* fall under the heading of * "derived work". * * Copyright (C) [2004, 2005, 2006], Hyperic, Inc. * This file is part of HQ. * * HQ is free software; you can redistribute it and/or modify * it under the terms version 2 of the GNU General Public License 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 for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA. */ package org.hyperic.hq.plugin.weblogic.jmx; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import java.util.Properties; import javax.management.Attribute; import javax.management.AttributeList; import javax.management.InstanceNotFoundException; import javax.management.MBeanServer; import javax.management.ObjectName; import javax.management.ReflectionException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hyperic.hq.plugin.weblogic.WeblogicConfig; import org.hyperic.hq.plugin.weblogic.WeblogicProductPlugin; public class WeblogicQuery { protected static final String ATTR_NOTES = "Notes"; protected Map attrs = new HashMap(); private WeblogicQuery parent; private String name; private String version; private static final WeblogicQuery[] NOOP_CHILD_QUERIES = new WeblogicQuery[0]; private static final String[] NOOP_ATTRIBUTE_NAMES = new String[0]; private static final Properties NOOP_PROPERTIES = new Properties(); private static final Log log = LogFactory.getLog(WeblogicQuery.class); public WeblogicQuery cloneInstance() { WeblogicQuery query; try { query = (WeblogicQuery) this.getClass().newInstance(); } catch (InstantiationException e) { throw new IllegalArgumentException(e.getMessage()); } catch (IllegalAccessException e) { throw new IllegalArgumentException(e.getMessage()); } query.setParent(getParent()); query.setName(getName()); query.setVersion(getVersion()); return query; } public String[] getAttributeNames() { return NOOP_ATTRIBUTE_NAMES; } public String[] getCustomPropertiesNames() { return NOOP_ATTRIBUTE_NAMES; } public boolean getAttributes(MBeanServer mServer, ObjectName name) { return getAttributes(mServer, name, getAttributeNames()); } protected void logAttrFailure(ObjectName name, String[] attrNames, Exception e) { if (log.isDebugEnabled()) { String msg = "attributes " + Arrays.asList(attrNames) + " not found for '" + name + "' : " + e; log.debug(msg); } } public boolean getAttributes(MBeanServer mServer, ObjectName name, String[] attrNames) { if (name == null) { return false; } if (attrNames.length == 0) { setName(name.getKeyProperty("Name")); return true; } AttributeList list; try { list = mServer.getAttributes(name, attrNames); } catch (InstanceNotFoundException e) { //given that the ObjectName is from queryNames //returned by the server this should not happen. //however, it is possible when nodes are not properly //configured. logAttrFailure(name, attrNames, e); return false; } catch (ReflectionException e) { //this should not happen either logAttrFailure(name, attrNames, e); return false; } if (list == null) { //only 6.1 seems to behave this way, //modern weblogics throw exceptions. return false; } for (int i = 0; i < list.size(); i++) { Attribute attr = (Attribute) list.get(i); Object obj = attr.getValue(); if (obj != null) { this.attrs.put(attr.getName(), obj.toString()); } } return true; } public String getAttribute(String name) { return (String) this.attrs.get(name); } public String getAttribute(String name, String defval) { String attr = getAttribute(name); if (attr == null) { return defval; } return attr; } public WeblogicQuery[] getChildQueries() { return NOOP_CHILD_QUERIES; } //should be abstract public String getResourceType() { return null; } //should be abstract public String getPropertyName() { return null; } //should be abstract public String getMBeanType() { return null; } public String getMBeanAlias() { return getMBeanType(); } public String getMBeanNameProperty() { return getName(); } public boolean skipParentScope() { return false; } public String getScope() { WeblogicQuery query = getParent(); StringBuffer scope = new StringBuffer(); scope.append("Type="); scope.append(getMBeanType()); while (query != null) { if (!skipParentScope()) { scope.append(","); scope.append(query.getMBeanAlias()); scope.append("="); scope.append(query.getMBeanNameProperty()); } query = query.getParent(); } return scope.toString(); } public WeblogicQuery getParent() { return this.parent; } //cam only has two levels server -> service //some queries go deeper public WeblogicQuery getResourceParent() { return getParent(); } public String getResourceName() { return getResourceParent().getResourceType() + " " + getResourceType(); } //XXX this seems like it should be easier public String getFullName() { StringBuffer name = new StringBuffer(); ArrayList names = new ArrayList(); WeblogicQuery query = this; do { names.add(query.getQualifiedName()); } while ((query = query.getParent()) != null); for (int i = names.size() - 1; i >= 0; i--) { name.append(names.get(i)); if (i != 0) { name.append(" "); } } return name.toString(); } public String getResourceFullName() { return WeblogicProductPlugin.SERVER_NAME + " " + getFullName() + " " + getResourceType(); } public void setParent(WeblogicQuery value) { this.parent = value; } public String getQualifiedName() { return getName(); } public String getName() { return this.name; } public void setName(String value) { this.name = value; } public String getVersion() { return this.version; } public boolean isServer61() { return isServer61(this.version); } public static boolean isServer61(String version) { return WeblogicProductPlugin.VERSION_61.equals(version); } public boolean isServer91() { return isServer91(this.version); } public static boolean isServer91(String version) { return WeblogicConfig.majorVersion(version) >= 9; } public void setVersion(String version) { this.version = version; } public String getDescription() { //return getAttribute(ATTR_NOTES); return null; //XXX } public void configure(Properties props) { props.setProperty(getPropertyName(), getName()); } public boolean hasControl() { return true; } public Properties getControlConfig() { return NOOP_PROPERTIES; } public boolean hasResponseTime() { Properties config = getResponseTimeConfig(); return config != NOOP_PROPERTIES; } public Properties getResponseTimeConfig() { return NOOP_PROPERTIES; } public Properties getResourceConfig() { Properties props = new Properties(); configure(props); return props; } public Properties getCustomProperties() { String[] names = getCustomPropertiesNames(); if (names.length == 0) { return NOOP_PROPERTIES; } Properties cprops = new Properties(); for (int i = 0; i < names.length; i++) { String value = getAttribute(names[i]); if (value != null) { cprops.setProperty(names[i], value); } } return cprops; } }