Struts example source code file (InitOperations.java)

This example Struts source code file (InitOperations.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 - Struts tags/keywords

dispatcher, dispatcher, hostconfig, hostconfig, illegalaccessexception, initoperations, instantiationexception, iterator, list, list, loggerfactory, regex, staticcontentloader, string, string, util

The Struts InitOperations.java source code

/*
 * $Id: DefaultActionSupport.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * 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.struts2.dispatcher.ng;

import com.opensymphony.xwork2.util.logging.LoggerFactory;
import com.opensymphony.xwork2.ActionContext;
import org.apache.struts2.dispatcher.Dispatcher;
import org.apache.struts2.dispatcher.StaticContentLoader;
import org.apache.struts2.util.ClassLoaderUtils;
import org.apache.struts2.StrutsConstants;

import java.util.*;
import java.util.regex.Pattern;

/**
 * Contains initialization operations
 */
public class InitOperations {

    public InitOperations() {
    }

    /**
     * Initializes the internal Struts logging
     */
    public void initLogging( HostConfig filterConfig ) {
        String factoryName = filterConfig.getInitParameter("loggerFactory");
        if (factoryName != null) {
            try {
                Class cls = ClassLoaderUtils.loadClass(factoryName, this.getClass());
                LoggerFactory fac = (LoggerFactory) cls.newInstance();
                LoggerFactory.setLoggerFactory(fac);
            } catch ( InstantiationException e ) {
                System.err.println("Unable to instantiate logger factory: " + factoryName + ", using default");
                e.printStackTrace();
            } catch ( IllegalAccessException e ) {
                System.err.println("Unable to access logger factory: " + factoryName + ", using default");
                e.printStackTrace();
            } catch ( ClassNotFoundException e ) {
                System.err.println("Unable to locate logger factory class: " + factoryName + ", using default");
                e.printStackTrace();
            }
        }
    }

    /**
     * Creates and initializes the dispatcher
     */
    public Dispatcher initDispatcher( HostConfig filterConfig ) {
        Dispatcher dispatcher = createDispatcher(filterConfig);
        dispatcher.init();
        return dispatcher;
    }

    /**
     * Initializes the static content loader with the filter configuration
     */
    public StaticContentLoader initStaticContentLoader( HostConfig filterConfig, Dispatcher dispatcher ) {
        StaticContentLoader loader = dispatcher.getContainer().getInstance(StaticContentLoader.class);
        loader.setHostConfig(filterConfig);
        return loader;
    }

    /**
     * @return The dispatcher on the thread.
     *
     * @throws IllegalStateException If there is no dispatcher available
     */
    public Dispatcher findDispatcherOnThread() {
        Dispatcher dispatcher = Dispatcher.getInstance();
        if (dispatcher == null) {
            throw new IllegalStateException("Must have the StrutsPrepareFilter execute before this one");
        }
        return dispatcher;
    }

    /**
     * Create a {@link Dispatcher}
     */
    private Dispatcher createDispatcher( HostConfig filterConfig ) {
        Map<String, String> params = new HashMap();
        for ( Iterator e = filterConfig.getInitParameterNames(); e.hasNext(); ) {
            String name = (String) e.next();
            String value = filterConfig.getInitParameter(name);
            params.put(name, value);
        }
        return new Dispatcher(filterConfig.getServletContext(), params);
    }

    public void cleanup() {
        ActionContext.setContext(null);
    }

    /**
     * Extract a list of patterns to exclude from request filtering
     *
     * @param dispatcher The dispatcher to check for exclude pattern configuration
     *
     * @return a List of Patterns for request to exclude if apply, or <tt>null
     *
     * @see org.apache.struts2.StrutsConstants#STRUTS_ACTION_EXCLUDE_PATTERN
     */
    public List<Pattern> buildExcludedPatternsList( Dispatcher dispatcher ) {
        return buildExcludedPatternsList(dispatcher.getContainer().getInstance(String.class, StrutsConstants.STRUTS_ACTION_EXCLUDE_PATTERN));
    }
            
    private List<Pattern> buildExcludedPatternsList( String patterns ) {
        if (null != patterns && patterns.trim().length() != 0) {
            List<Pattern> list = new ArrayList();
            String[] tokens = patterns.split(",");
            for ( String token : tokens ) {
                list.add(Pattern.compile(token.trim()));
            }
            return Collections.unmodifiableList(list);
        } else {
            return null;
        }
    }

}