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 * may not use this file except in compliance with the License. You can obtain
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 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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package com.sun.enterprise.cli.commands.monitor;

import com.sun.enterprise.cli.framework.*;
import com.sun.appserv.management.monitor.*;
import com.sun.appserv.management.monitor.statistics.*;
import javax.management.j2ee.statistics.*;
import com.sun.appserv.management.j2ee.statistics.*;
import java.util.TimerTask;
import java.util.Timer;
import java.io.File;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import com.sun.enterprise.util.i18n.StringManager;


public abstract class MonitorTask extends TimerTask
{
    final int NUM_ROWS = 25;
    int counter = 0;
    ServerRootMonitor srm = null;
    String monitorType = null;
    String filter = null;
    Timer timer = null;
    File fileName = null;
    boolean verbose = false;
    static final StringManager localStrings = StringManager.getManager(MonitorTask.class);
    

    public MonitorTask() {}


    abstract public void displayDetails();
    
    public MonitorTask(final ServerRootMonitor srm, final String filter, final Timer timer,
                       final boolean verbose, final File fileName)
    {
        this.srm = srm;
        this.timer = timer;
        if (filter != null)
            this.filter = filter;
        this.verbose = verbose;
        this.fileName = fileName;
    }

    void cancelMonitorTask()
    {
        timer.cancel();
        final String msg = localStrings.getString("commands.monitor.press_to_quit");
        CLILogger.getInstance().printMessage(msg);
    }

    void checkForNumberOfElements(String[] keys) throws MonitorTaskException
    {
        if (keys.length<1)
        {
            throw new MonitorTaskException(localStrings.getString("command.monitor.no_value_to_monitor"));
        }
        else if (keys.length > 1)
        {
            StringBuffer sb = new StringBuffer();
            sb.append(localStrings.getString("commands.monitor.more_than_one_monitoring_elements"));
            sb.append(localStrings.getString("commands.monitor.available_elements"));
            for (String key: keys) {
                sb.append("    ");
                sb.append(key);
                sb.append("\n");
            }
            throw new MonitorTaskException(sb.toString());
        }
    }

    
    synchronized void writeToFile(final String text)
    {
        try {
            BufferedWriter out = new BufferedWriter(new FileWriter(fileName, true));
            out.append(text);
            out.newLine();
            out.close();
        }
        catch (IOException ioe) {
            final String unableToWriteFile = localStrings.getString("commands.monitor.unable_to_write_to_file", new Object[] {fileName.getName()});
            CLILogger.getInstance().printMessage(unableToWriteFile);
            if (verbose) {
                ioe.printStackTrace();
            }
        }
    }
}