Package ch.supertomcat.supertomcatutils.application

Class ApplicationUtil

java.lang.Object

ch.supertomcat.supertomcatutils.application.ApplicationUtil

public final class ApplicationUtil
extends Object

Utility class to initialize an application

Method Summary

Modifier and Type	Method	Description
static int	compareVersions(String v1, String v2)	Compares two Version-Strings
static JFrame	createInvisibleFrame(String title)	Create invisible frame, which can be used as parent for JOptionPane dialogs, so that the message is displayed in the taskbar
static JFrame	createInvisibleFrame(String title, Image icon)	Create invisible frame, which can be used as parent for JOptionPane dialogs, so that the message is displayed in the taskbar
static void	deleteOldBackupFiles(File folder, String filename, int daysToKeepBackup)	Deletes old backup files
static void	deleteOldLogFiles(int days, String logFileName, String logPath)
static String	formatStackTrace(Throwable throwable)	Format Stacktrace to String
static FileLock	getLockFile()
static String	getThisApplicationsJarFilename(Class<?> classInJarFile)	Returns the filename of this application's Jar File or an empty string, if the filename could not be detected
static String	getThisApplicationsPath(String jarFilename)	Returns the path of this application
static void	initializeSLF4JUncaughtExceptionHandler()	Sets the default UncaughtExceptionHandler to a handler, which logs exceptions to SLF4J
static boolean	lockLockFile(String strLockFilePath, String strLockFilename)	Try to lock the lockfile
static void	logApplicationInfo()	Logs application info
static boolean	releaseLockFile()	Release lock file
static void	writeBasicErrorLogfile(File file, String errorMessage)	Writes an error logfile for the case when no Loggers are initialized.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getThisApplicationsPath

public static String getThisApplicationsPath(String jarFilename)

Returns the path of this application

Parameters:

jarFilename - Filename of the Jar

Returns:

Path

getThisApplicationsJarFilename

public static String getThisApplicationsJarFilename(Class<?> classInJarFile)

Returns the filename of this application's Jar File or an empty string, if the filename could not be detected

Parameters:

classInJarFile - Class which is in Jar File

Returns:

Jar Filename or an empty String

compareVersions

public static int compareVersions(String v1,
                                  String v2)

Compares two Version-Strings

Parameters:

v1 - First Version-String

v2 - Second Version-String

Returns:

0 or less than 0 or more than 0

lockLockFile

public static boolean lockLockFile(String strLockFilePath,
                                   String strLockFilename)

Try to lock the lockfile

Parameters:

strLockFilePath - Lockfile Path

strLockFilename - Lockfile Filename

Returns:

True if successful

releaseLockFile

public static boolean releaseLockFile()

Release lock file

Returns:

True if successful, false otherwise

getLockFile

public static FileLock getLockFile()

Returns:

FileLock or null

deleteOldLogFiles

public static void deleteOldLogFiles(int days,
                                     String logFileName,
                                     String logPath)

Parameters:

days - Days

logFileName - Logfile Name

logPath - Logfile Path

initializeSLF4JUncaughtExceptionHandler

public static void initializeSLF4JUncaughtExceptionHandler()

Sets the default UncaughtExceptionHandler to a handler, which logs exceptions to SLF4J

logApplicationInfo

public static void logApplicationInfo()

Logs application info

writeBasicErrorLogfile

public static void writeBasicErrorLogfile(File file,
                                          String errorMessage)

Writes an error logfile for the case when no Loggers are initialized. If an Exception occurs while writing the file, the Stacktrace is printed to the console.

Parameters:

file - File

errorMessage - Error Message

deleteOldBackupFiles

public static void deleteOldBackupFiles(File folder,
                                        String filename,
                                        int daysToKeepBackup)

Deletes old backup files

Parameters:

folder - Folder

filename - Filename

daysToKeepBackup - Days to keep backups

createInvisibleFrame

public static JFrame createInvisibleFrame(String title)

Create invisible frame, which can be used as parent for JOptionPane dialogs, so that the message is displayed in the taskbar

Parameters:

title - Window Title

Returns:

Invisible Frame

createInvisibleFrame

public static JFrame createInvisibleFrame(String title,
                                          Image icon)

Create invisible frame, which can be used as parent for JOptionPane dialogs, so that the message is displayed in the taskbar

Parameters:

title - Window Title

icon - Icon

Returns:

Invisible Frame

formatStackTrace

public static String formatStackTrace(Throwable throwable)

Format Stacktrace to String

Parameters:

throwable - Throwable

Returns:

Stacktrace as String