Omid Pourhadi omidp

omidp / CategoryDetailEntity.java

Last active September 6, 2024 06:59

Hibernate query cache

	@Entity
	@Table(name = "category_detail")
	@Data
	@NoArgsConstructor
	@AllArgsConstructor
	@EqualsAndHashCode(of = "id")
	public class CategoryDetailEntity {

	@Id
	@Column(name = "category_id")

omidp / PowersetCombination.java

Last active August 1, 2024 12:03

PowersetCombination with backtracking

	import java.util.ArrayList;
	import java.util.List;

	public class PowersetCombination {

	// Method to generate all k-combinations of a given set
	public static <T> List<List<T>> generateCombinations(List<T> set, int k) {
	List<List<T>> combinations = new ArrayList<>();
	generateCombinations(set, k, 0, new ArrayList<>(), combinations);
	return combinations;

omidp / Chain.java

Created July 29, 2024 19:32

Java chain result functional way

	public static void main(String[] args){

	int i = ((ThenResult<String>) ()-> "1")
	.then(s->Integer.parseInt(s))
	.result()

	}

	public interface ThenResult<T> {
	T result();

omidp / postgresql_is_enough.md

Created March 27, 2024 10:17 — forked from cpursley/postgresql_is_enough.md

Postgres is Enough

PostgreSQL is Enough

omidp / RateLimiterConfig.java

Created September 24, 2023 18:10

RateLimiterServlet

	import io.github.resilience4j.ratelimiter.RateLimiter;
	import org.springframework.context.annotation.Bean;
	import org.springframework.context.annotation.Configuration;

	import java.time.Duration;

	@Configuration
	public class RateLimiterConfig {

	@Bean

omidp / application.properties

Created March 18, 2023 11:34

Spring boot application.properties for production

	## Postgresql configuration
	set Postgresql max_connections to 250



	## HikariCP configuration
	spring.datasource.hikari.minimumIdle=0
	spring.datasource.hikari.maximum-pool-size=90
	spring.datasource.hikari.maxLifetime=900000
	spring.datasource.hikari.data-source-properties.useServerPrepStmts=false

omidp / uuidtobin

Created December 21, 2022 16:11

java uuid to db binary 16


	public byte[] getByte(UUID uuid) {
	ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
	bb.putLong(uuid.getMostSignificantBits());
	bb.putLong(uuid.getLeastSignificantBits());
	return bb.array();
	}

omidp / macCheatSheet

Created July 14, 2022 07:16

mac cheatsheet

find . -type d -depth 1 -exec git --git-dir={}/.git --work-tree=$PWD/{} pull \;

omidp / sync

Created March 24, 2022 10:30

sync

	import java.util.*;
	import java.util.concurrent.locks.*;

	/**
	* A bank with a number of bank accounts that uses locks for serializing access.
	*/

	public class Bank
	{
	private final double[] accounts;

omidp / GatewayContext.java

Last active February 27, 2022 16:55

scg-body-cache

	import org.springframework.util.MultiValueMap;



	public class GatewayContext {

	public static final String CACHE_GATEWAY_CONTEXT = "cacheGatewayContext";

	/**
	* cache json body