Package ee.datel.dogis.utils

Class CommonUtils

java.lang.Object

ee.datel.dogis.utils.CommonUtils

@Component
public class CommonUtils
extends Object

Common methods.

Method Summary

Modifier and Type	Method	Description
static String	concatenate(CharSequence... part)	Concatenates strings.
static LocalDateTime	convertToLocalDateTimeZ(Date dateZoned)	Convert Date to LocalDateTime UTC.
static Date	convertToLocalizedDate(LocalDateTime utcTimestamp)	Convert LocalDateTime to Localized Date.
static <K, T> T	copyFields(K source, T target)	Copy values of fields with same name from one object to other, uses reflection.
static String	deUtf8(String value)	Corrects when needed wrongly decoded UTF-8 strings.
static void	doNothing(Throwable ex)	Does nothing.
static Throwable	getExceptionCause(Exception ex)	REtrieves the root cause from exception.
static ExecutorService	getForkJoinPool()	Provides singleton ForkJoinPool
static OutputStream	getGzipOutputstream(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, OutputStream out)	Wraps response output stream with GzipOutputstream, adds Content Encoding HTTP header.
static int	getRandomInt()	Random integer provider.
static long	getRandomLong()	Random long provider.
static SecureRandom	getRandomProvider()	Random provider, singleton.
static org.springframework.scheduling.SchedulingTaskExecutor	getTaskExecutor()	Provides singleton SchedulingTaskExecutor
static ExecutorService	getVirtualExecutor()	Provides singleton Virtual Thread ExecutorService
static boolean	isGzipAccepted(jakarta.servlet.http.HttpServletRequest request)	Test whether request accepts response gzip'ed compression.
static StringBuilder	popBuffer()	Retrieve a StringBuilder.
static void	push(StringBuilder sb)	Stores buffer back into storage.
static String[]	split(String list, char onChar)	Splits input string on separator char. Trims result and removes empty elements.

Methods inherited from class java.lang.Object

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

Method Details

getForkJoinPool

public static ExecutorService getForkJoinPool()

Provides singleton ForkJoinPool

Returns:

the executor

getTaskExecutor

public static org.springframework.scheduling.SchedulingTaskExecutor getTaskExecutor()

Provides singleton SchedulingTaskExecutor

Returns:

the executor

getVirtualExecutor

public static ExecutorService getVirtualExecutor()

Provides singleton Virtual Thread ExecutorService

Returns:

the executor

copyFields

public static <K,
T> T copyFields(K source,
 T target)

Copy values of fields with same name from one object to other, uses reflection.

Type Parameters:

K - generic

T - generic

Parameters:

source - values source object

target - target object

Returns:

target object with values copied

doNothing

public static void doNothing(Throwable ex)

Does nothing.

Parameters:

ex - exception

getRandomInt

public static int getRandomInt()

Random integer provider.

Returns:

random value

getRandomLong

public static long getRandomLong()

Random long provider.

Returns:

random value

getRandomProvider

public static SecureRandom getRandomProvider()

Random provider, singleton.

Returns:

provider.

getExceptionCause

public static Throwable getExceptionCause(Exception ex)

REtrieves the root cause from exception.

Parameters:

ex - exception

Returns:

root cause

popBuffer

public static StringBuilder popBuffer()

Retrieve a StringBuilder.

Returns:

StringBuilder

push

public static void push(StringBuilder sb)

Stores buffer back into storage.

Parameters:

sb - StringBuilder to store

concatenate

public static String concatenate(CharSequence... part)

Concatenates strings.

Parameters:

part - values to concatenate

Returns:

concatenated string

split

public static String[] split(String list,
 char onChar)

Splits input string on separator char.
Trims result and removes empty elements.

Parameters:

list - the sequence of characters to split

onChar - separator character

Returns:

splitted

convertToLocalizedDate

public static Date convertToLocalizedDate(LocalDateTime utcTimestamp)

Convert LocalDateTime to Localized Date.

Parameters:

utcTimestamp - UTC dateTime

Returns:

truncatedTo(ChronoUnit.MILLIS)

convertToLocalDateTimeZ

public static LocalDateTime convertToLocalDateTimeZ(Date dateZoned)

Convert Date to LocalDateTime UTC.

Parameters:

dateZoned - localized date

Returns:

truncatedTo(ChronoUnit.MILLIS)

isGzipAccepted

public static boolean isGzipAccepted(jakarta.servlet.http.HttpServletRequest request)

Test whether request accepts response gzip'ed compression.

Parameters:

request - http request

Returns:

test result

getGzipOutputstream

public static OutputStream getGzipOutputstream(jakarta.servlet.http.HttpServletRequest request,
 jakarta.servlet.http.HttpServletResponse response,
 OutputStream out)
                                        throws IOException

Wraps response output stream with GzipOutputstream, adds Content Encoding HTTP header.

Parameters:

request - HTTP request

response - HTTP response

out - HTTP response output stream

Returns:

wrapped output stream

Throws:

IOException - then exception

deUtf8

public static String deUtf8(String value)

Corrects when needed wrongly decoded UTF-8 strings.

Parameters:

value - input string

Returns:

correct string