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Ufuk Uzun ufuk

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ufuk / DistributedLock.java

Last active July 14, 2024 08:54

Distributed lock solution for Spring projects, using aspect and Redis

	import java.lang.annotation.ElementType;
	import java.lang.annotation.Retention;
	import java.lang.annotation.RetentionPolicy;
	import java.lang.annotation.Target;
	import java.util.concurrent.TimeUnit;

	@Retention(RetentionPolicy.RUNTIME)
	@Target(ElementType.METHOD)
	public @interface DistributedLock {

ufuk / hsqldb-with-postgresql-syntax.properties

Last active February 18, 2025 08:56

To use HSQLDB with PostgreSQL syntax add ";sql.syntax_pgs=true" to end of the JDBC URL. Alternatively use ";sql.syntax_ora=true" for Oracle.

spring.datasource.url=jdbc:hsqldb:mem:testdb;sql.syntax_pgs=true

ufuk / LoggingObjectMapper.java

Created April 20, 2017 11:37

JSON serializing with masking support...

	import com.fasterxml.jackson.databind.AnnotationIntrospector;
	import com.fasterxml.jackson.databind.ObjectMapper;
	import com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair;

	public final class LoggingObjectMapper extends ObjectMapper {

	private static final long serialVersionUID = -1620079742091329228L;

	public LoggingObjectMapper() {
	super();

ufuk / uniq-lines-with-grep.sh

Created May 28, 2017 21:07

Searching some text and getting unique result lines with grep

grep "search text" filename.txt | sort | uniq

ufuk / AsyncConfiguration.java

Last active December 10, 2022 21:43

The easy way to disable @ Async annotation for test contexts. Same approach can be used to disable @ Scheduled annotation as well.

	package ...configuration;

	import org.springframework.context.annotation.Configuration;
	import org.springframework.context.annotation.Profile;
	import org.springframework.scheduling.annotation.EnableAsync;

	@Configuration
	@EnableAsync
	@Profile("!test")
	public class AsyncConfiguration {

ufuk / siege-post-json.sh

Last active April 14, 2023 16:37

Siege command to benchmark POST method with JSON payload and headers example. ("-c" for concurrent request count) ("-t" for time) ("-H" for header)

siege -c50 -t5S -H 'Content-Type: application/json' -H 'access-token: ...' 'http://localhost:8080/... POST {"...": "...", ...}'

ufuk / find-largest-10-directories.sh

Last active July 9, 2017 19:22

Helps you to find out largest 10 directories in the current working directory in a UNIX system. (Command to see disk usage: df -h)

du -a . | sort -n -r | head -n 10

ufuk / concatenate-grep-and-split-by-delimeter.sh

Created July 10, 2017 09:08

Concatenate files, grep lines, split by a delimeter using awk and print some columns as sorted and uniqe. May be useful for parsing logs.

cat file1 file2 ... fileN | grep "<SEARCHING TEXT>" | awk -F'<DELIMETER>' '{print $1 $2 ... $n;}' | sort | uniq

ufuk / SomeSpringBeanThatNeedsAResource.java

Last active July 11, 2017 07:50

Getting and using a file from classpath with Spring's @ Value annotation.

	package ...;

	import org.springframework.beans.factory.annotation.Value;
	import org.springframework.core.io.Resource;
	import org.springframework.stereotype.Service;

	import java.io.InputStream;

	@Service
	public class SomeSpringBeanThatNeedsAResource {

ufuk / postgresql-export-import-schema.sh

Last active June 11, 2018 12:50

Exporting and then importing full schema for PostgreSQL.

	# export
	PGPASSWORD="<PASSWORD>" pg_dump -U <USERNAME> -h <HOST> -d <DB_NAME> -n <SCHEMA_NAME> > export.sql

	# import
	PGPASSWORD="<PASSWORD>" psql -U <USERNAME> -h <HOST> -d <DB_NAME> -n <SCHEMA_NAME> -f export.sql