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Commons Modeler example source code file (MbeansDescriptorsDOMSource.java)

This example Commons Modeler source code file (MbeansDescriptorsDOMSource.java) 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 - Commons Modeler tags/keywords

attributeinfo, create, dom, exception, fieldinfo, fieldinfo, io, list, node, node, object, operationinfo, parameterinfo, parameterinfo, string, string, util

The Commons Modeler MbeansDescriptorsDOMSource.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.modeler.modules;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.modeler.AttributeInfo;
import org.apache.commons.modeler.ConstructorInfo;
import org.apache.commons.modeler.FieldInfo;
import org.apache.commons.modeler.ManagedBean;
import org.apache.commons.modeler.NotificationInfo;
import org.apache.commons.modeler.OperationInfo;
import org.apache.commons.modeler.ParameterInfo;
import org.apache.commons.modeler.Registry;
import org.apache.commons.modeler.util.DomUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Node;


public class MbeansDescriptorsDOMSource extends ModelerSource
{
    private static Log log = LogFactory.getLog(MbeansDescriptorsDOMSource.class);

    Registry registry;
    String location;
    String type;
    Object source;
    List mbeans=new ArrayList();

    public void setRegistry(Registry reg) {
        this.registry=reg;
    }

    public void setLocation( String loc ) {
        this.location=loc;
    }

    /** Used if a single component is loaded
     *
     * @param type
     */
    public void setType( String type ) {
       this.type=type;
    }

    public void setSource( Object source ) {
        this.source=source;
    }

    public List loadDescriptors( Registry registry, String location,
                                 String type, Object source)
            throws Exception
    {
        setRegistry(registry);
        setLocation(location);
        setType(type);
        setSource(source);
        execute();
        return mbeans;
    }

    public void execute() throws Exception {
        if( registry==null ) registry=Registry.getRegistry();

        try {
            InputStream stream=(InputStream)source;
            long t1=System.currentTimeMillis();
            Document doc=DomUtil.readXml(stream);
            // Ignore for now the name of the root element
            Node descriptorsN=doc.getDocumentElement();
            //Node descriptorsN=DomUtil.getChild(doc, "mbeans-descriptors");
            if( descriptorsN == null ) {
                log.error("No descriptors found");
                return;
            }

            Node firstMbeanN=null;
            if( "mbean".equals( descriptorsN.getNodeName() ) ) {
                firstMbeanN=descriptorsN;
            } else {
                firstMbeanN=DomUtil.getChild(descriptorsN, "mbean");
            }

            if( firstMbeanN==null ) {
                log.error(" No mbean tags ");
                return;
            }

            // Process each <mbean> element
            for (Node mbeanN = firstMbeanN; mbeanN != null;
                 mbeanN= DomUtil.getNext(mbeanN))
            {

                // Create a new managed bean info
                ManagedBean managed=new ManagedBean();
                DomUtil.setAttributes(managed, mbeanN);
                Node firstN;

                // Process descriptor subnode
                Node mbeanDescriptorN =
                    DomUtil.getChild(mbeanN, "descriptor");
                if (mbeanDescriptorN != null) {
                    Node firstFieldN =
                        DomUtil.getChild(mbeanDescriptorN, "field");
                    for (Node fieldN = firstFieldN; fieldN != null;
                         fieldN = DomUtil.getNext(fieldN)) {
                        FieldInfo fi = new FieldInfo();
                        DomUtil.setAttributes(fi, fieldN);
                        managed.addField(fi);
                    }
                }

                // process attribute nodes
                firstN=DomUtil.getChild( mbeanN, "attribute");
                for (Node descN = firstN; descN != null;
                     descN = DomUtil.getNext( descN ))
                {

                    // Create new attribute info
                    AttributeInfo ai=new AttributeInfo();
                    DomUtil.setAttributes(ai, descN);

                    // Process descriptor subnode
                    Node descriptorN =
                        DomUtil.getChild(descN, "descriptor");
                    if (descriptorN != null) {
                        Node firstFieldN =
                            DomUtil.getChild(descriptorN, "field");
                        for (Node fieldN = firstFieldN; fieldN != null;
                             fieldN = DomUtil.getNext(fieldN)) {
                            FieldInfo fi = new FieldInfo();
                            DomUtil.setAttributes(fi, fieldN);
                            ai.addField(fi);
                        }
                    }

                    // Add this info to our managed bean info
                    managed.addAttribute( ai );
                    if (log.isTraceEnabled()) {
                        log.trace("Create attribute " + ai);
                    }

                }

                // process constructor nodes
                firstN=DomUtil.getChild( mbeanN, "constructor");
                for (Node descN = firstN; descN != null;
                     descN = DomUtil.getNext( descN )) {

                    // Create new constructor info
                    ConstructorInfo ci=new ConstructorInfo();
                    DomUtil.setAttributes(ci, descN);

                    // Process descriptor subnode
                    Node firstDescriptorN =
                        DomUtil.getChild(descN, "descriptor");
                    if (firstDescriptorN != null) {
                        Node firstFieldN =
                            DomUtil.getChild(firstDescriptorN, "field");
                        for (Node fieldN = firstFieldN; fieldN != null;
                             fieldN = DomUtil.getNext(fieldN)) {
                            FieldInfo fi = new FieldInfo();
                            DomUtil.setAttributes(fi, fieldN);
                            ci.addField(fi);
                        }
                    }

                    // Process parameter subnodes
                    Node firstParamN=DomUtil.getChild( descN, "parameter");
                    for (Node paramN = firstParamN;  paramN != null;
                         paramN = DomUtil.getNext(paramN))
                    {
                        ParameterInfo pi=new ParameterInfo();
                        DomUtil.setAttributes(pi, paramN);
                        ci.addParameter( pi );
                    }

                    // Add this info to our managed bean info
                    managed.addConstructor( ci );
                    if (log.isTraceEnabled()) {
                        log.trace("Create constructor " + ci);
                    }

                }

                // process notification nodes
                firstN=DomUtil.getChild( mbeanN, "notification");
                for (Node descN = firstN; descN != null;
                     descN = DomUtil.getNext( descN ))
                {

                    // Create new notification info
                    NotificationInfo ni=new NotificationInfo();
                    DomUtil.setAttributes(ni, descN);

                    // Process descriptor subnode
                    Node firstDescriptorN =
                        DomUtil.getChild(descN, "descriptor");
                    if (firstDescriptorN != null) {
                        Node firstFieldN =
                            DomUtil.getChild(firstDescriptorN, "field");
                        for (Node fieldN = firstFieldN; fieldN != null;
                             fieldN = DomUtil.getNext(fieldN)) {
                            FieldInfo fi = new FieldInfo();
                            DomUtil.setAttributes(fi, fieldN);
                            ni.addField(fi);
                        }
                    }

                    // Process notification-type subnodes
                    Node firstParamN=DomUtil.getChild( descN, "notification-type");
                    for (Node paramN = firstParamN;  paramN != null;
                         paramN = DomUtil.getNext(paramN))
                    {
                        ni.addNotifType( DomUtil.getContent(paramN) );
                    }

                    // Add this info to our managed bean info
                    managed.addNotification( ni );
                    if (log.isTraceEnabled()) {
                        log.trace("Created notification " + ni);
                    }

                }

                // process operation nodes
                firstN=DomUtil.getChild( mbeanN, "operation");
                for (Node descN = firstN; descN != null;
                     descN = DomUtil.getNext( descN ))

                {

                    // Create new operation info
                    OperationInfo oi=new OperationInfo();
                    DomUtil.setAttributes(oi, descN);

                    // Process descriptor subnode
                    Node firstDescriptorN =
                        DomUtil.getChild(descN, "descriptor");
                    if (firstDescriptorN != null) {
                        Node firstFieldN =
                            DomUtil.getChild(firstDescriptorN, "field");
                        for (Node fieldN = firstFieldN; fieldN != null;
                             fieldN = DomUtil.getNext(fieldN)) {
                            FieldInfo fi = new FieldInfo();
                            DomUtil.setAttributes(fi, fieldN);
                            oi.addField(fi);
                        }
                    }

                    // Process parameter subnodes
                    Node firstParamN=DomUtil.getChild( descN, "parameter");
                    for (Node paramN = firstParamN;  paramN != null;
                         paramN = DomUtil.getNext(paramN))
                    {
                        ParameterInfo pi=new ParameterInfo();
                        DomUtil.setAttributes(pi, paramN);
                        if( log.isTraceEnabled())
                            log.trace("Add param " + pi.getName());
                        oi.addParameter( pi );
                    }

                    // Add this info to our managed bean info
                    managed.addOperation( oi );
                    if( log.isTraceEnabled()) {
                        log.trace("Create operation " + oi);
                    }

                }

                // Add the completed managed bean info to the registry
                //registry.addManagedBean(managed);
                mbeans.add( managed );

            }

            long t2=System.currentTimeMillis();
            log.debug( "Reading descriptors ( dom ) " + (t2-t1));
        } catch( Exception ex ) {
            log.error( "Error reading descriptors ", ex);
        }
    }
}

Other Commons Modeler examples (source code examples)

Here is a short list of links related to this Commons Modeler MbeansDescriptorsDOMSource.java source code file:

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