Leave your code better than you found it

Yusuf Çakal yusufcakal

Leave your code better than you found it

Java Developer

ufuk / jcmd.sh

Created December 6, 2022 14:12

Display a Java process' system properties or flags (https://docs.oracle.com/en/java/javase/17/docs/specs/man/jcmd.html)

	# list Java processes
	jcmd -l

	# list running JVM's system properties or flags (select a 'pid' from above command's result list)
	jcmd pid VM.system_properties
	jcmd pid VM.flags

ufuk / git-empty-commit.sh

Created March 12, 2022 17:54

How to force git allowing to commit with empty content?

git commit --allow-empty -m "trigger pipeline with an empty commit"

ufuk / HtmlToTextUtils.java

Created October 6, 2021 13:13

Utility method to convert HTML text to plain text while preserving newlines (using jsoup as main dependency)

	import org.apache.commons.lang3.StringUtils;
	import org.jsoup.Jsoup;
	import org.jsoup.nodes.Document;
	import org.jsoup.nodes.Element;
	import org.jsoup.nodes.Node;
	import org.jsoup.nodes.TextNode;

	import java.util.List;
	import java.util.stream.Collectors;

ufuk / XmlUtils.java

Last active November 12, 2021 13:36

Various XML utilities, such as unmarshal and consume XML input stream by target element name (and -optional- target element depth).

	import lombok.AccessLevel;
	import lombok.NoArgsConstructor;
	import lombok.extern.slf4j.Slf4j;
	import org.apache.commons.lang3.StringUtils;

	import javax.xml.bind.JAXBContext;
	import javax.xml.bind.Unmarshaller;
	import javax.xml.stream.XMLInputFactory;
	import javax.xml.stream.XMLStreamReader;
	import javax.xml.stream.util.StreamReaderDelegate;

ufuk / TextUtils.java

Last active April 8, 2021 07:03

Curated text utils for specific use cases

	import org.apache.commons.lang3.StringUtils;

	import java.text.Normalizer;
	import java.util.Arrays;
	import java.util.List;
	import java.util.Locale;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;
	import java.util.stream.Collectors;

ufuk / ExampleConstraint.java

Last active March 20, 2024 13:47

How to initialize an instance of the constraint annotation while writing unit tests for a javax.validation.ConstraintValidator

	import javax.validation.Constraint;
	import javax.validation.Payload;
	import java.lang.annotation.*;

	@Documented
	@Constraint(validatedBy = ExampleConstraintValidator.class)
	@Target({ElementType.FIELD})
	@Retention(RetentionPolicy.RUNTIME)
	public @interface ExampleConstraint {

ufuk / SpringDataPageUtils.java

Last active February 8, 2021 13:04

SpringDataPageUtils to convert paged entities to paged model objects

	import org.springframework.data.domain.Page;
	import org.springframework.data.support.PageableExecutionUtils;

	import java.util.function.Function;
	import java.util.stream.Collectors;

	public final class SpringDataPageUtils {

	public static <T, C> Page<C> convertPage(Page<T> page, Function<T, C> converter) {
	return PageableExecutionUtils.getPage(

ufuk / HttpServletRequestResponsePrinter.java

Created September 5, 2019 06:54

Utility to generate logging-purpose text for HttpServletRequest/Response

	package ...;

	import ...JsonUtils;
	import lombok.extern.slf4j.Slf4j;
	import org.apache.commons.io.IOUtils;
	import org.springframework.http.HttpHeaders;
	import org.springframework.util.LinkedMultiValueMap;
	import org.springframework.util.MultiValueMap;
	import org.springframework.web.util.ContentCachingRequestWrapper;
	import org.springframework.web.util.WebUtils;

ufuk / BaseMockito2JUnit4Test.java

Last active October 24, 2021 17:52

Performs "verify no more interactions" check automatically for all mock objects (works with Mockito version 2 or higher & JUnit version 4 and 5). For detailed description: https://ufukuzun.wordpress.com/2019/04/09/ne-olup-bittiginden-habersiz-testlere-derman-mockscollector/ (Turkish)

	import org.apache.commons.lang3.ArrayUtils;
	import org.junit.After;
	import org.junit.runner.RunWith;
	import org.mockito.InOrder;
	import org.mockito.junit.MockitoJUnitRunner;

	import static org.mockito.Mockito.inOrder;
	import static org.mockito.Mockito.verifyNoMoreInteractions;

	@RunWith(MockitoJUnitRunner.class)

EliasRanz / MongoConfig.java

Last active June 12, 2024 19:48

Mongo Configuration for Amazon DocumentDB utilizing Spring-Boot and spring-data-mongodb

	import com.mongodb.MongoClient;
	import com.mongodb.MongoClientOptions;
	import com.mongodb.MongoCredential;
	import com.mongodb.ServerAddress;
	import lombok.extern.log4j.Log4j2;
	import org.springframework.beans.factory.annotation.Value;
	import org.springframework.context.annotation.Bean;
	import org.springframework.context.annotation.Configuration;
	import org.springframework.context.annotation.Profile;
	import org.springframework.data.mongodb.config.AbstractMongoConfiguration;