- /*
- * $Header: /home/cvspublic/jakarta-commons/modeler/src/java/org/apache/commons/modeler/ManagedBean.java,v 1.9 2003/07/20 07:35:13 ggregory Exp $
- * $Revision: 1.9 $
- * $Date: 2003/07/20 07:35:13 $
- *
- * ====================================================================
- *
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2003 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Commons", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- * [Additional notices, if required by prior licensing conditions]
- *
- */
-
-
- package org.apache.commons.modeler;
-
-
- import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
-
- import javax.management.Descriptor;
- import javax.management.InstanceNotFoundException;
- import javax.management.MBeanException;
- import javax.management.RuntimeOperationsException;
- import javax.management.modelmbean.InvalidTargetObjectTypeException;
- import javax.management.modelmbean.ModelMBean;
- import javax.management.modelmbean.ModelMBeanAttributeInfo;
- import javax.management.modelmbean.ModelMBeanConstructorInfo;
- import javax.management.modelmbean.ModelMBeanInfo;
- import javax.management.modelmbean.ModelMBeanInfoSupport;
- import javax.management.modelmbean.ModelMBeanNotificationInfo;
- import javax.management.modelmbean.ModelMBeanOperationInfo;
-
-
- /**
- * <p>Internal configuration information for a managed bean (MBean)
- * descriptor.</p>
- *
- * @author Craig R. McClanahan
- * @version $Revision: 1.9 $ $Date: 2003/07/20 07:35:13 $
- */
-
- public class ManagedBean implements java.io.Serializable
- {
- // ----------------------------------------------------- Instance Variables
-
-
- /**
- * The <code>ModelMBeanInfo</code> object that corresponds
- * to this <code>ManagedBean</code> instance.
- */
- transient ModelMBeanInfo info = null;
- protected AttributeInfo attributes[] = new AttributeInfo[0];
- protected String className =
- "org.apache.commons.modeler.BaseModelMBean";
- protected ConstructorInfo constructors[] = new ConstructorInfo[0];
- protected String description = null;
- protected String domain = null;
- protected String group = null;
- protected String name = null;
-
- protected List fields = new ArrayList();
- protected NotificationInfo notifications[] = new NotificationInfo[0];
- protected OperationInfo operations[] = new OperationInfo[0];
- protected String type = null;
-
- /** Constructor. Will add default attributes.
- *
- */
- public ManagedBean() {
- AttributeInfo ai=new AttributeInfo();
- ai.setName("modelerType");
- ai.setDescription("Type of the modeled resource. Can be set only once");
- ai.setType("java.lang.String");
- addAttribute(ai);
- }
-
- // ------------------------------------------------------------- Properties
-
-
- /**
- * The collection of attributes for this MBean.
- */
- public AttributeInfo[] getAttributes() {
- return (this.attributes);
- }
-
-
- /**
- * The fully qualified name of the Java class of the MBean
- * described by this descriptor. If not specified, the standard JMX
- * class (<code>javax.management.modelmbean.RequiredModeLMBean</code>)
- * will be utilized.
- */
- public String getClassName() {
- return (this.className);
- }
-
- public void setClassName(String className) {
- this.className = className;
- this.info = null;
- }
-
-
- /**
- * The collection of constructors for this MBean.
- */
- public ConstructorInfo[] getConstructors() {
- return (this.constructors);
- }
-
-
- /**
- * The human-readable description of this MBean.
- */
- public String getDescription() {
- return (this.description);
- }
-
- public void setDescription(String description) {
- this.description = description;
- this.info = null;
- }
-
-
- /**
- * The (optional) <code>ObjectName</code> domain in which this MBean
- * should be registered in the MBeanServer.
- */
- public String getDomain() {
- return (this.domain);
- }
-
- public void setDomain(String domain) {
- this.domain = domain;
- }
-
-
- /**
- * <p>Return a <code>List</code> of the {@link FieldInfo} objects for
- * the name/value pairs that should be
- * added to the Descriptor created from this metadata.</p>
- */
- public List getFields() {
- return (this.fields);
- }
-
-
- /**
- * The (optional) group to which this MBean belongs.
- */
- public String getGroup() {
- return (this.group);
- }
-
- public void setGroup(String group) {
- this.group = group;
- }
-
-
- /**
- * The name of this managed bean, which must be unique among all
- * MBeans managed by a particular MBeans server.
- */
- public String getName() {
- return (this.name);
- }
-
- public void setName(String name) {
- this.name = name;
- this.info = null;
- }
-
-
- /**
- * The collection of notifications for this MBean.
- */
- public NotificationInfo[] getNotifications() {
- return (this.notifications);
- }
-
-
- /**
- * The collection of operations for this MBean.
- */
- public OperationInfo[] getOperations() {
- return (this.operations);
- }
-
-
- /**
- * The fully qualified name of the Java class of the resource
- * implementation class described by the managed bean described
- * by this descriptor.
- */
- public String getType() {
- return (this.type);
- }
-
- public void setType(String type) {
- this.type = type;
- this.info = null;
- }
-
-
- // --------------------------------------------------------- Public Methods
-
-
- /**
- * Add a new attribute to the set of attributes for this MBean.
- *
- * @param attribute The new attribute descriptor
- */
- public void addAttribute(AttributeInfo attribute) {
-
- synchronized (attributes) {
- AttributeInfo results[] =
- new AttributeInfo[attributes.length + 1];
- System.arraycopy(attributes, 0, results, 0, attributes.length);
- results[attributes.length] = attribute;
- attributes = results;
- this.info = null;
- }
-
- }
-
-
- /**
- * Add a new constructor to the set of constructors for this MBean.
- *
- * @param constructor The new constructor descriptor
- */
- public void addConstructor(ConstructorInfo constructor) {
-
- synchronized (constructors) {
- ConstructorInfo results[] =
- new ConstructorInfo[constructors.length + 1];
- System.arraycopy(constructors, 0, results, 0, constructors.length);
- results[constructors.length] = constructor;
- constructors = results;
- this.info = null;
- }
-
- }
-
-
- /**
- * <p>Add a new field to the fields associated with the
- * Descriptor that will be created from this metadata.</p>
- *
- * @param field The field to be added
- */
- public void addField(FieldInfo field) {
- fields.add(field);
- }
-
-
- /**
- * Add a new notification to the set of notifications for this MBean.
- *
- * @param notification The new notification descriptor
- */
- public void addNotification(NotificationInfo notification) {
-
- synchronized (notifications) {
- NotificationInfo results[] =
- new NotificationInfo[notifications.length + 1];
- System.arraycopy(notifications, 0, results, 0,
- notifications.length);
- results[notifications.length] = notification;
- notifications = results;
- this.info = null;
- }
-
- }
-
-
- /**
- * Add a new operation to the set of operations for this MBean.
- *
- * @param operation The new operation descriptor
- */
- public void addOperation(OperationInfo operation) {
- synchronized (operations) {
- OperationInfo results[] =
- new OperationInfo[operations.length + 1];
- System.arraycopy(operations, 0, results, 0, operations.length);
- results[operations.length] = operation;
- operations = results;
- this.info = null;
- }
-
- }
-
-
- /**
- * Create and return a <code>ModelMBean</code> that has been
- * preconfigured with the <code>ModelMBeanInfo</code> information
- * for this managed bean, but is not associated with any particular
- * managed resource. The returned <code>ModelMBean</code> will
- * <strong>NOT</strong> have been registered with our
- * <code>MBeanServer</code>.
- *
- * @exception InstanceNotFoundException if the managed resource
- * object cannot be found
- * @exception InvalidTargetObjectTypeException if our MBean cannot
- * handle object references (should never happen)
- * @exception MBeanException if a problem occurs instantiating the
- * <code>ModelMBean</code> instance
- * @exception RuntimeOperationsException if a JMX runtime error occurs
- */
- public ModelMBean createMBean()
- throws InstanceNotFoundException,
- InvalidTargetObjectTypeException,
- MBeanException, RuntimeOperationsException {
-
- return (createMBean(null));
-
- }
-
-
- /**
- * Create and return a <code>ModelMBean</code> that has been
- * preconfigured with the <code>ModelMBeanInfo</code> information
- * for this managed bean, and is associated with the specified
- * managed object instance. The returned <code>ModelMBean</code>
- * will <strong>NOT</strong> have been registered with our
- * <code>MBeanServer</code>.
- *
- * @param instance Instanced of the managed object, or <code>null</code>
- * for no associated instance
- *
- * @exception InstanceNotFoundException if the managed resource
- * object cannot be found
- * @exception InvalidTargetObjectTypeException if our MBean cannot
- * handle object references (should never happen)
- * @exception MBeanException if a problem occurs instantiating the
- * <code>ModelMBean</code> instance
- * @exception RuntimeOperationsException if a JMX runtime error occurs
- */
- public ModelMBean createMBean(Object instance)
- throws InstanceNotFoundException,
- InvalidTargetObjectTypeException,
- MBeanException, RuntimeOperationsException {
-
- // Load the ModelMBean implementation class
- Class clazz = null;
- Exception ex = null;
- try {
- clazz = Class.forName(getClassName());
- } catch (Exception e) {
- }
-
- if( clazz==null ) {
- try {
- ClassLoader cl= Thread.currentThread().getContextClassLoader();
- if ( cl != null)
- clazz= cl.loadClass(getClassName());
- } catch (Exception e) {
- ex=e;
- }
- }
-
- if( clazz==null) {
- throw new MBeanException
- (ex, "Cannot load ModelMBean class " + getClassName());
- }
-
- // Create a new ModelMBean instance
- ModelMBean mbean = null;
- try {
- mbean = (ModelMBean) clazz.newInstance();
- mbean.setModelMBeanInfo(createMBeanInfo());
- } catch (MBeanException e) {
- throw e;
- } catch (RuntimeOperationsException e) {
- throw e;
- } catch (Exception e) {
- throw new MBeanException
- (e, "Cannot instantiate ModelMBean of class " +
- getClassName());
- }
-
- // Set the managed resource (if any)
- try {
- if (instance != null)
- mbean.setManagedResource(instance, "objectReference");
- } catch (InstanceNotFoundException e) {
- throw e;
- } catch (InvalidTargetObjectTypeException e) {
- throw e;
- }
- return (mbean);
-
- }
-
-
- /**
- * Create and return a <code>ModelMBeanInfo</code> object that
- * describes this entire managed bean.
- */
- public ModelMBeanInfo createMBeanInfo() {
-
- // Return our cached information (if any)
- if (info != null)
- return (info);
-
- // Create subordinate information descriptors as required
- AttributeInfo attrs[] = getAttributes();
- ModelMBeanAttributeInfo attributes[] =
- new ModelMBeanAttributeInfo[attrs.length];
- for (int i = 0; i < attrs.length; i++)
- attributes[i] = attrs[i].createAttributeInfo();
-
- ConstructorInfo consts[] = getConstructors();
- ModelMBeanConstructorInfo constructors[] =
- new ModelMBeanConstructorInfo[consts.length];
- for (int i = 0; i < consts.length; i++)
- constructors[i] = consts[i].createConstructorInfo();
- NotificationInfo notifs[] = getNotifications();
- ModelMBeanNotificationInfo notifications[] =
- new ModelMBeanNotificationInfo[notifs.length];
- for (int i = 0; i < notifs.length; i++)
- notifications[i] = notifs[i].createNotificationInfo();
- OperationInfo opers[] = getOperations();
- ModelMBeanOperationInfo operations[] =
- new ModelMBeanOperationInfo[opers.length];
- for (int i = 0; i < opers.length; i++)
- operations[i] = opers[i].createOperationInfo();
-
- /*
- // Add operations for attribute getters and setters as needed
- ArrayList list = new ArrayList();
- for (int i = 0; i < operations.length; i++)
- list.add(operations[i]);
- for (int i = 0; i < attributes.length; i++) {
- Descriptor descriptor = attributes[i].getDescriptor();
- String getMethod = (String) descriptor.getFieldValue("getMethod");
- if (getMethod != null) {
- OperationInfo oper =
- new OperationInfo(getMethod, true,
- attributes[i].getType());
- list.add(oper.createOperationInfo());
- }
- String setMethod = (String) descriptor.getFieldValue("setMethod");
- if (setMethod != null) {
- OperationInfo oper =
- new OperationInfo(setMethod, false,
- attributes[i].getType());
- list.add(oper.createOperationInfo());
- }
- }
- if (list.size() > operations.length)
- operations =
- (ModelMBeanOperationInfo[]) list.toArray(operations);
- */
-
- // Construct and return a new ModelMBeanInfo object
- info = new ModelMBeanInfoSupport
- (getClassName(), getDescription(),
- attributes, constructors, operations, notifications);
- try {
- Descriptor descriptor = info.getMBeanDescriptor();
- Iterator fields = getFields().iterator();
- while (fields.hasNext()) {
- FieldInfo field = (FieldInfo) fields.next();
- descriptor.setField(field.getName(), field.getValue());
- }
- info.setMBeanDescriptor(descriptor);
- } catch (MBeanException e) {
- ;
- }
-
- return (info);
-
- }
-
-
- /**
- * Return a string representation of this managed bean.
- */
- public String toString() {
-
- StringBuffer sb = new StringBuffer("ManagedBean[");
- sb.append("name=");
- sb.append(name);
- sb.append(", className=");
- sb.append(className);
- sb.append(", description=");
- sb.append(description);
- if (group != null) {
- sb.append(", group=");
- sb.append(group);
- }
- sb.append(", type=");
- sb.append(type);
- sb.append("]");
- return (sb.toString());
-
- }
-
-
- }