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Tomcat example source code file (MbeansDescriptorsDigesterSource.java)

This example Tomcat 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 - Tomcat tags/keywords

apache, digester, digester, exception, foundation//dtd, inputstream, io, list, model, net, network, object, object, registry, registry, string, string, util

The Tomcat 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.tomcat.util.modeler.modules;

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

import org.apache.tomcat.util.digester.Digester;
import org.apache.tomcat.util.modeler.Registry;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;

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();
    protected static Digester digester = null;
    
    protected static Digester createDigester(Registry registry) {

        Digester digester = new Digester();
        digester.setNamespaceAware(false);
        digester.setValidating(false);
        URL url = Registry.getRegistry(null, null).getClass().getResource
            ("/org/apache/tomcat/util/modeler/mbeans-descriptors.dtd");
        digester.register
            ("-//Apache Software Foundation//DTD Model MBeans Configuration File",
                url.toString());
        
        // Configure the parsing rules
        digester.addObjectCreate
            ("mbeans-descriptors/mbean",
            "org.apache.tomcat.util.modeler.ManagedBean");
        digester.addSetProperties
            ("mbeans-descriptors/mbean");
        digester.addSetNext
            ("mbeans-descriptors/mbean",
                "add",
            "java.lang.Object");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/attribute",
            "org.apache.tomcat.util.modeler.AttributeInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/attribute");
        digester.addSetNext
            ("mbeans-descriptors/mbean/attribute",
                "addAttribute",
            "org.apache.tomcat.util.modeler.AttributeInfo");
        
        /*digester.addObjectCreate
            ("mbeans-descriptors/mbean/attribute/descriptor/field",
            "org.apache.tomcat.util.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/attribute/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/attribute/descriptor/field",
                "addField",
            "org.apache.tomcat.util.modeler.FieldInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/constructor",
            "org.apache.tomcat.util.modeler.ConstructorInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/constructor");
        digester.addSetNext
            ("mbeans-descriptors/mbean/constructor",
                "addConstructor",
            "org.apache.tomcat.util.modeler.ConstructorInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/constructor/descriptor/field",
            "org.apache.tomcat.util.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/constructor/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/constructor/descriptor/field",
                "addField",
            "org.apache.tomcat.util.modeler.FieldInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/constructor/parameter",
            "org.apache.tomcat.util.modeler.ParameterInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/constructor/parameter");
        digester.addSetNext
            ("mbeans-descriptors/mbean/constructor/parameter",
                "addParameter",
            "org.apache.tomcat.util.modeler.ParameterInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/descriptor/field",
            "org.apache.tomcat.util.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/descriptor/field",
                "addField",
            "org.apache.tomcat.util.modeler.FieldInfo");
        */
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/notification",
            "org.apache.tomcat.util.modeler.NotificationInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/notification");
        digester.addSetNext
            ("mbeans-descriptors/mbean/notification",
                "addNotification",
            "org.apache.tomcat.util.modeler.NotificationInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/notification/descriptor/field",
            "org.apache.tomcat.util.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/notification/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/notification/descriptor/field",
                "addField",
            "org.apache.tomcat.util.modeler.FieldInfo");
        
        digester.addCallMethod
            ("mbeans-descriptors/mbean/notification/notification-type",
                "addNotifType", 0);
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/operation",
            "org.apache.tomcat.util.modeler.OperationInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/operation");
        digester.addSetNext
            ("mbeans-descriptors/mbean/operation",
                "addOperation",
            "org.apache.tomcat.util.modeler.OperationInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/operation/descriptor/field",
            "org.apache.tomcat.util.modeler.FieldInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/operation/descriptor/field");
        digester.addSetNext
            ("mbeans-descriptors/mbean/operation/descriptor/field",
                "addField",
            "org.apache.tomcat.util.modeler.FieldInfo");
        
        digester.addObjectCreate
            ("mbeans-descriptors/mbean/operation/parameter",
            "org.apache.tomcat.util.modeler.ParameterInfo");
        digester.addSetProperties
            ("mbeans-descriptors/mbean/operation/parameter");
        digester.addSetNext
            ("mbeans-descriptors/mbean/operation/parameter",
                "addParameter",
            "org.apache.tomcat.util.modeler.ParameterInfo");
        
        return digester;
        
    }
    
    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(null, null);
        }

        InputStream stream = (InputStream) source;

        if (digester == null) {
            digester = createDigester(registry);
        }
        
        synchronized (digester) {

            // Process the input file to configure our registry
            try {
                // Push our registry object onto the stack
                digester.push(mbeans);
                digester.parse(stream);
            } catch (Exception e) {
                log.error("Error digesting Registry data", e);
                throw e;
            } finally {
                digester.reset();
            }
        
        }
            
    }
}

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat MbeansDescriptorsDigesterSource.java source code file:

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