fileenvplugin.java

chatper4JdonCMS.rar

package com.jdon.cms.events;



import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.ArrayList;
import javax.servlet.ServletException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.util.LabelValueBean;

import com.jdon.util.Debug;
import com.jdon.cms.xml.XmlUtil;
import com.jdon.util.StringUtil;
/**
 *
 * <p><strong>IMPLEMENTATION WARNING</strong> - If this web application is run
 * from a WAR file, or in another environment where reading and writing of the
 * web application resource is impossible, the initial contents will be copied
 * to a file in the web application temporary directory provided by the
 * container.  This is for demonstration purposes only - you should
 * <strong>NOT</strong> assume that files written here will survive a restart
 * of your servlet container.</p>
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.8 $ $Date: 2003/02/17 00:31:45 $
 */

public final class FileEnvPlugIn implements PlugIn {

    private final static String module = FileEnvPlugIn.class.getName();
    private final static XmlUtil xmlUtil = XmlUtil.getInstance();

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

    /**
     * The application configuration for our owning module.
     */
    private ModuleConfig config = null;

    /**
     * The {@link ActionServlet} owning this application.
     */
    private ActionServlet servlet = null;

    /**
     * The web application resource path of our persistent database
     * storage file.
     */
    private String pathname = "/WEB-INF/web.xml";

    // --------------------------------------------------------- PlugIn Methods


    /**
     * Gracefully shut down this database, releasing any resources
     * that were allocated at initialization.
     */
    public void destroy() {

        Debug.logWarning("Finalizing File plug in", module);


//        servlet.getServletContext().removeAttribute(Constants.DATABASE_KEY);
        servlet = null;
        config = null;

    }


    /**
     * Initialize and load our initial database from persistent storage.
     *
     * @param servlet The ActionServlet for this web application
     * @param config The ApplicationConfig for our owning module
     *
     * @exception ServletException if we cannot configure ourselves correctly
     */
    public void init(ActionServlet servlet, ModuleConfig config)
        throws ServletException {

        Debug.logWarning("Initializing file env plug in from '", module);

        // Remember our associated configuration and servlet
        this.config = config;
        this.servlet = servlet;

        String realpath = servlet.getServletContext().getRealPath(pathname);
        File file = new File(realpath);
        String homeDir = file.getParent();
        homeDir = StringUtil.replace(homeDir, "WEB-INF", "");

        try {
          xmlUtil.setHomeDir(homeDir);
          xmlUtil.InitFileEnv();
        } catch (Exception e) {
            throw new ServletException("Cannot init file env" , e);
        }


    }


}