Tomcat example source code file (ContextRuleSet.java)

This example Tomcat source code file (ContextRuleSet.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

context, context, context/listener, context/loader, context/manager, context/parameter, context/realm, context/realm, context/resources, context/valve, contextruleset, contextruleset, must, must

The Tomcat ContextRuleSet.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.catalina.startup;


import org.apache.tomcat.util.digester.Digester;
import org.apache.tomcat.util.digester.RuleSetBase;


/**
 * <p>RuleSet for processing the contents of a
 * Context or DefaultContext definition element.  To enable parsing of a
 * DefaultContext, be sure to specify a prefix that ends with "/Default".</p>
 *
 * @author Craig R. McClanahan
 * @version $Revision: 500684 $ $Date: 2007-01-28 00:27:18 +0100 (dim., 28 janv. 2007) $
 */

public class ContextRuleSet extends RuleSetBase {


    // ----------------------------------------------------- Instance Variables


    /**
     * The matching pattern prefix to use for recognizing our elements.
     */
    protected String prefix = null;


    /**
     * Should the context be created.
     */
    protected boolean create = true;


    // ------------------------------------------------------------ Constructor


    /**
     * Construct an instance of this <code>RuleSet with the default
     * matching pattern prefix.
     */
    public ContextRuleSet() {

        this("");

    }


    /**
     * Construct an instance of this <code>RuleSet with the specified
     * matching pattern prefix.
     *
     * @param prefix Prefix for matching pattern rules (including the
     *  trailing slash character)
     */
    public ContextRuleSet(String prefix) {

        super();
        this.namespaceURI = null;
        this.prefix = prefix;

    }


    /**
     * Construct an instance of this <code>RuleSet with the specified
     * matching pattern prefix.
     *
     * @param prefix Prefix for matching pattern rules (including the
     *  trailing slash character)
     */
    public ContextRuleSet(String prefix, boolean create) {

        super();
        this.namespaceURI = null;
        this.prefix = prefix;
        this.create = create;

    }


    // --------------------------------------------------------- Public Methods


    /**
     * <p>Add the set of Rule instances defined in this RuleSet to the
     * specified <code>Digester instance, associating them with
     * our namespace URI (if any).  This method should only be called
     * by a Digester instance.</p>
     *
     * @param digester Digester instance to which the new Rule instances
     *  should be added.
     */
    public void addRuleInstances(Digester digester) {

        if (create) {
            digester.addObjectCreate(prefix + "Context",
                    "org.apache.catalina.core.StandardContext", "className");
            digester.addSetProperties(prefix + "Context");
        } else {
            digester.addRule(prefix + "Context", new SetContextPropertiesRule());
        }

        if (create) {
            digester.addRule(prefix + "Context",
                             new LifecycleListenerRule
                                 ("org.apache.catalina.startup.ContextConfig",
                                  "configClass"));
            digester.addSetNext(prefix + "Context",
                                "addChild",
                                "org.apache.catalina.Container");
        }
        digester.addCallMethod(prefix + "Context/InstanceListener",
                               "addInstanceListener", 0);

        digester.addObjectCreate(prefix + "Context/Listener",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Context/Listener");
        digester.addSetNext(prefix + "Context/Listener",
                            "addLifecycleListener",
                            "org.apache.catalina.LifecycleListener");

        digester.addObjectCreate(prefix + "Context/Loader",
                            "org.apache.catalina.loader.WebappLoader",
                            "className");
        digester.addSetProperties(prefix + "Context/Loader");
        digester.addSetNext(prefix + "Context/Loader",
                            "setLoader",
                            "org.apache.catalina.Loader");

        digester.addObjectCreate(prefix + "Context/Manager",
                                 "org.apache.catalina.session.StandardManager",
                                 "className");
        digester.addSetProperties(prefix + "Context/Manager");
        digester.addSetNext(prefix + "Context/Manager",
                            "setManager",
                            "org.apache.catalina.Manager");

        digester.addObjectCreate(prefix + "Context/Manager/Store",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Context/Manager/Store");
        digester.addSetNext(prefix + "Context/Manager/Store",
                            "setStore",
                            "org.apache.catalina.Store");

        digester.addObjectCreate(prefix + "Context/Parameter",
                                 "org.apache.catalina.deploy.ApplicationParameter");
        digester.addSetProperties(prefix + "Context/Parameter");
        digester.addSetNext(prefix + "Context/Parameter",
                            "addApplicationParameter",
                            "org.apache.catalina.deploy.ApplicationParameter");

        digester.addObjectCreate(prefix + "Context/Realm",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Context/Realm");
        digester.addSetNext(prefix + "Context/Realm",
                            "setRealm",
                            "org.apache.catalina.Realm");

        digester.addObjectCreate(prefix + "Context/Resources",
                                 "org.apache.naming.resources.FileDirContext",
                                 "className");
        digester.addSetProperties(prefix + "Context/Resources");
        digester.addSetNext(prefix + "Context/Resources",
                            "setResources",
                            "javax.naming.directory.DirContext");

        digester.addObjectCreate(prefix + "Context/ResourceLink",
                "org.apache.catalina.deploy.ContextResourceLink");
        digester.addSetProperties(prefix + "Context/ResourceLink");
        digester.addRule(prefix + "Context/ResourceLink",
                new SetNextNamingRule("addResourceLink",
                        "org.apache.catalina.deploy.ContextResourceLink"));

        digester.addObjectCreate(prefix + "Context/Valve",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Context/Valve");
        digester.addSetNext(prefix + "Context/Valve",
                            "addValve",
                            "org.apache.catalina.Valve");

        digester.addCallMethod(prefix + "Context/WatchedResource",
                               "addWatchedResource", 0);

        digester.addCallMethod(prefix + "Context/WrapperLifecycle",
                               "addWrapperLifecycle", 0);

        digester.addCallMethod(prefix + "Context/WrapperListener",
                               "addWrapperListener", 0);

    }

}