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package shared;
import java.io.*;
import javax.swing.JFrame;
import server.*;
import client.*;
/**
* This class contains the static main method to start the program from.
* This class is also responsible for handling info ans status messages and
* the logging option of those messages.
* @author buetow
*
*/
public final class Main {
private static NetCalendarClient netCalendarClient = null;
private static BufferedWriter bufferedLogfileWriter = null;
/**
* This method is the start point of the whole program. Its initializing the static Config object
* and starts a calendar server and/or a calendar client thread depending on the "server_run" and
* "client_run" configuration options.
* @param args Specifies the program arguments (not used yet by the program)
*/
public static void main(String[] args) {
Config.initialize(args);
try {
FileWriter fileWriter = new FileWriter(Config.getStringValue("logfile"));
bufferedLogfileWriter = new BufferedWriter(fileWriter);
} catch (IOException e) {
infoMessage("Error: Could not open logfile: " + e.getMessage());
}
if (Config.getBooleanValue("server_run")) {
new NetCalendarServer(
Config.getIntValue("server_port"),
Config.getStringValue("server_database_dir"));
}
if (Config.getBooleanValue("client_run")) {
new Thread(new SplashScreen()).start();
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
netCalendarClient = new NetCalendarClient();
}
}
/**
* All info messages of the calendar client and the calendar server go through this method.
* They are not using System.out.* directly.
* @param sMessage Specifies the program info message.
*/
public static void infoMessage(String sMessage) {
// Later: Add logging to a logfile!
System.out.println(sMessage);
logMessage(sMessage);
}
/**
* This method is for various messages. All messages will show up in the status bar of the client's main window.
* If there is no main window, the infoMessage method will be used instead.
* @param sMessage Specifies the message to be displayed in the status bar.
*/
public static void statusMessage(String sMessage) {
if (netCalendarClient != null)
netCalendarClient.statusMessage(sMessage);
else
infoMessage(sMessage);
}
/**
* This method writes a specific message string into a logfile which is specified in the config.txt.
* @param sMessage Specified the message string to write into the logfile.
*/
private static void logMessage(String sMessage) {
if (bufferedLogfileWriter != null) {
try {
bufferedLogfileWriter.write(sMessage + "\n");
// bufferedLogfileWriter.flush();
} catch(IOException e) {
Main.infoMessage("Error: Could not write to logfile: " + e.toString());
}
}
}
/**
* This method is called thenever the server or the client process wants to exit.
* @param iCode Specifies the exit code to use for the System.exit call.
*/
public static void exit(int iCode) {
infoMessage("Shutting down the current process");
try {
bufferedLogfileWriter.close();
} catch(IOException e) {
System.err.println("Error: Could not close logfile: " + e.toString());
}
System.exit(iCode);
}
/**
* This method executes an external program.
* @param sCommand Specifies the command string to execute.
*/
public static void execExternalCommand(String sCommand) {
if (sCommand.equals("none") || sCommand.equals(""))
return;
try {
Runtime.getRuntime().exec(sCommand);
} catch (IOException e) {
Main.infoMessage("Error while executing external command: " + e.getMessage());
}
}
}
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