Commons Modeler example source code file (MbeansDescriptorsDigesterSource.java)

This example Commons Modeler source code file (MbeansDescriptorsDigesterSource.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

arraylist, digester, exception, exception, file, io, list, loaded, net, network, object, object, registry, registry, string, string, url, util

The Commons Modeler MbeansDescriptorsDigesterSource.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.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.digester.Digester;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.modeler.Registry;

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

        InputStream stream=(InputStream)source;

        long t1=System.currentTimeMillis();

        Digester digester = new Digester();
        digester.setNamespaceAware(false);
        digester.setValidating(false);
        URL url = registry.getClass().getResource
                ("/org/apache/commons/modeler/mbeans-descriptors.dtd");
        digester.register
                ("-//Apache Software Foundation//DTD Model MBeans Configuration File",
                        url.toString());

        // Push our registry object onto the stack
        digester.push(mbeans);

        // Configure the parsing rules
        digester.addObjectCreate
                ("mbeans-descriptors/mbean",
                        "org.apache.commons.modeler.ManagedBean");
        digester.addSetProperties
                ("mbeans-descriptors/mbean");
        digester.addSetNext
                ("mbeans-descriptors/mbean",
                        "add",
                        "java.lang.Object");

        digester.addObjectCreate
                ("mbeans-descriptors/mbean/attribute",
                        "org.apache.commons.modeler.AttributeInfo");
        digester.addSetProperties
                ("mbeans-descriptors/mbean/attribute");
        digester.addSetNext
                ("mbeans-descriptors/mbean/attribute",
                        "addAttribute",
                        "org.apache.commons.modeler.AttributeInfo");

        digester.addObjectCreate
            ("mbeans-descriptors/mbean/attribute/descriptor/field",
             "org.apache.commons.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/attribute/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/attribute/descriptor/field",
             "addField",
             "org.apache.commons.modeler.FieldInfo");

        digester.addObjectCreate
                ("mbeans-descriptors/mbean/constructor",
                        "org.apache.commons.modeler.ConstructorInfo");
        digester.addSetProperties
                ("mbeans-descriptors/mbean/constructor");
        digester.addSetNext
                ("mbeans-descriptors/mbean/constructor",
                        "addConstructor",
                        "org.apache.commons.modeler.ConstructorInfo");

        digester.addObjectCreate
            ("mbeans-descriptors/mbean/constructor/descriptor/field",
             "org.apache.commons.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/constructor/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/constructor/descriptor/field",
             "addField",
             "org.apache.commons.modeler.FieldInfo");

        digester.addObjectCreate
                ("mbeans-descriptors/mbean/constructor/parameter",
                        "org.apache.commons.modeler.ParameterInfo");
        digester.addSetProperties
                ("mbeans-descriptors/mbean/constructor/parameter");
        digester.addSetNext
                ("mbeans-descriptors/mbean/constructor/parameter",
                        "addParameter",
                        "org.apache.commons.modeler.ParameterInfo");

        digester.addObjectCreate
            ("mbeans-descriptors/mbean/descriptor/field",
             "org.apache.commons.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/descriptor/field",
             "addField",
             "org.apache.commons.modeler.FieldInfo");

        digester.addObjectCreate
                ("mbeans-descriptors/mbean/notification",
                        "org.apache.commons.modeler.NotificationInfo");
        digester.addSetProperties
                ("mbeans-descriptors/mbean/notification");
        digester.addSetNext
                ("mbeans-descriptors/mbean/notification",
                        "addNotification",
                        "org.apache.commons.modeler.NotificationInfo");

        digester.addObjectCreate
            ("mbeans-descriptors/mbean/notification/descriptor/field",
             "org.apache.commons.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/notification/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/notification/descriptor/field",
             "addField",
             "org.apache.commons.modeler.FieldInfo");

        digester.addCallMethod
                ("mbeans-descriptors/mbean/notification/notification-type",
                        "addNotifType", 0);

        digester.addObjectCreate
                ("mbeans-descriptors/mbean/operation",
                        "org.apache.commons.modeler.OperationInfo");
        digester.addSetProperties
                ("mbeans-descriptors/mbean/operation");
        digester.addSetNext
                ("mbeans-descriptors/mbean/operation",
                        "addOperation",
                        "org.apache.commons.modeler.OperationInfo");

        digester.addObjectCreate
            ("mbeans-descriptors/mbean/operation/descriptor/field",
             "org.apache.commons.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/operation/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/operation/descriptor/field",
             "addField",
             "org.apache.commons.modeler.FieldInfo");

        digester.addObjectCreate
                ("mbeans-descriptors/mbean/operation/parameter",
                        "org.apache.commons.modeler.ParameterInfo");
        digester.addSetProperties
                ("mbeans-descriptors/mbean/operation/parameter");
        digester.addSetNext
                ("mbeans-descriptors/mbean/operation/parameter",
                        "addParameter",
                        "org.apache.commons.modeler.ParameterInfo");

        // Process the input file to configure our registry
        try {
            digester.parse(stream);
        } catch (Exception e) {
            log.error("Error digesting Registry data", e);
            throw e;
        }
        long t2=System.currentTimeMillis();
//        if( t2-t1 > 500 )
        log.info("Loaded registry information (digester) " + ( t2 - t1 ) + " ms");
    }
}