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package com.sun.enterprise.admin.event.pluggable;

import com.sun.logging.LogDomains;
import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.sun.enterprise.admin.event.RRPersistenceHelper;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.server.ApplicationServer;
import com.sun.enterprise.server.ServerContext;
import com.sun.enterprise.admin.server.core.AdminService;
import com.sun.enterprise.admin.event.ElementChangeHelper;


//i18n import
import com.sun.enterprise.util.i18n.StringManager;

/**
 * Restart event Helper - class providing support for informing
 * server(s) to set its(their) restart required state to true or false.
 *
 * @author: Satish Viswanatham
 */
public final class PERestartEventHelper implements RestartEventHelper{

    // i18n StringManager
    private static final Logger _logger     = 
                        Logger.getLogger(LogDomains.ADMIN_LOGGER);
    
    public PERestartEventHelper() {
    }

    /**
     * Given a config change list, this method figures out if that list contains
     * any non dynamic recofigurable changes. If there is any change which can
     * not be applied dynamically, if sets the restart status on the appropriate
     * target servers.
     *
     * @param ctx        Config context of DAS 
     * @param list       config change list
     */
    public void setRestartRequiredForTarget(ConfigContext ctx, 
            ArrayList configChangeList ) {
   
        try {
            AdminService admServ = AdminService.getAdminService();

            if ((admServ != null) && (admServ.isDas())) {
                Set nonDynSet = ElementChangeHelper.
                    getXPathesForDynamicallyNotReconfigurableElements(
                    configChangeList);

                Iterator iter = nonDynSet.iterator();

                if (iter.hasNext()) {
                    RRPersistenceHelper rrHelper = new RRPersistenceHelper();
                    rrHelper.setRestartRequired(true);
                }
            }
        } catch (Throwable t) {
            _logger.log(Level.INFO, "event.exception_during_restart_reset",
                        t);
        }

    }


}