UpdateApplicationStateAction.java

/* ===============================================================================
 *
 * Part of the InfoGlue Content Management Platform (www.infoglue.org)
 *
 * ===============================================================================
 *
 *  Copyright (C)
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 2, as published by the
 * Free Software Foundation. See the file LICENSE.html for more information.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY, including the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc. / 59 Temple
 * Place, Suite 330 / Boston, MA 02111-1307 / USA.
 *
 * ===============================================================================
 */

package org.infoglue.calendar.actions;

import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Category;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;

/**
 * This is the action that shows the application state and also can be used to set up surveilence.
 * The idea is to have one command which allways returns a known resultpage if it's ok. Otherwise it prints
 * an error-statement. This action is then called every x minutes by the surveilence and an alarm is raised if something is wrong.
 * We also have a command which can list more status about the application.
 *
 * @author Mattias Bogeblad
 */

public class UpdateApplicationStateAction extends CalendarAbstractAction 
{
    private List states 					= new ArrayList();
    
	private boolean databaseConnectionOk 	= false;
	private boolean applicationSettingsOk 	= false;
	private boolean testQueriesOk			= false;
	private boolean diskPermissionOk 		= false;
	
	private String cacheName				= "";

	private String className				= "";
	private String logLevel					= "";

	/**
	 * The constructor for this action - contains nothing right now.
	 */
    
    public UpdateApplicationStateAction() 
    {
	
    }
    
    private Category getDeliverCategory()
    {
        Enumeration enumeration = Logger.getCurrentCategories();
        while(enumeration.hasMoreElements())
        {
            Category category = (Category)enumeration.nextElement();
            if(category.getName().equalsIgnoreCase("org.infoglue.deliver"))
                return category;
        }
        
        return null;
    }

    private Category getCastorJDOCategory()
    {
        Enumeration enumeration = Logger.getCurrentCategories();
        while(enumeration.hasMoreElements())
        {
            Category category = (Category)enumeration.nextElement();
            if(category.getName().equalsIgnoreCase("org.exolab.castor.jdo"))
                return category;
        }
        
        return null;
    }

    private Category getCategory(String className)
    {
        Enumeration enumeration = Logger.getCurrentCategories();
        while(enumeration.hasMoreElements())
        {
            Category category = (Category)enumeration.nextElement();
            if(category.getName().equalsIgnoreCase(className))
                return category;
        }
        
        Category category = Category.getInstance(className);
       
        return category;
    }

    /**
     * This action allows clearing of the given cache manually.
     */
    public String doClearCache() throws Exception
    {
        
        return "cleared";
    }


    /**
     * This action allows clearing of the caches manually.
     */
    public String doClearCaches() throws Exception
    {
        return "cleared";
    }

    
    private List getList(String key, String value)
    {
        List list = new ArrayList();
        list.add(key);
        list.add(value);

        return list;
    }
    
    
    /**
     * This method is the application entry-point. The method does a lot of checks to see if infoglue
     * is installed correctly and if all resources needed are available.
     */
         
    public String execute() throws Exception 
    {
    	Level newLevel = Level.ERROR;
    	if(this.logLevel.equalsIgnoreCase("debug"))
    		newLevel = Level.DEBUG;
    	if(this.logLevel.equalsIgnoreCase("info"))
    		newLevel = Level.INFO;
    	else if(this.logLevel.equalsIgnoreCase("warn"))
    		newLevel = Level.WARN;
    	else if(this.logLevel.equalsIgnoreCase("error"))
    		newLevel = Level.ERROR;
    	
    	Category category = getCategory(this.className);
    	if(category != null)
    		category.setLevel(newLevel);
        
        return "success";
    }
        
	public boolean getIsApplicationSettingsOk()
	{
		return applicationSettingsOk;
	}

	public boolean getIsDatabaseConnectionOk()
	{
		return databaseConnectionOk;
	}

	public boolean getIsDiskPermissionOk()
	{
		return diskPermissionOk;
	}

	public boolean getIsTestQueriesOk()
	{
		return testQueriesOk;
	}

    public List getStates()
    {
        return states;
    }
    
    public void setCacheName(String cacheName)
    {
        this.cacheName = cacheName;
    }
    
    public String getServerName()
    {
    	String serverName = "Unknown";

    	try
    	{
		    InetAddress localhost = InetAddress.getLocalHost();
		    serverName = localhost.getHostName();
    	}
    	catch(Exception e)
    	{
    		
    	}
    	
	    return serverName;
    }

	public void setClassName(String className) {
		this.className = className;
	}

	public void setLogLevel(String logLevel) {
		this.logLevel = logLevel;
	}
}