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Md Sazzad Islam lynas

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@lynas
lynas / JavaConcurrentAndAsyncProgramming.MD
Last active May 4, 2025 16:02

Java Multithreading

Concurrency

public class Main {
    public static void main(String[] args) throws Exception {
        Counter counter = new Counter();
        var t1 = new CounterIncrementerThread(counter);
        var t2 = new CounterIncrementerThread(counter);
 t1.start();
@lynas
lynas / S3FileUpload.kt
Last active February 3, 2025 08:48
Upload multipart file to AWS S3
import java.io.InputStream
import java.net.URI
import org.springframework.context.annotation.Bean
import software.amazon.awssdk.auth.credentials.AwsBasicCredentials
import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider
import software.amazon.awssdk.core.sync.RequestBody
import software.amazon.awssdk.regions.Region
import software.amazon.awssdk.services.s3.S3Client
import software.amazon.awssdk.services.s3.S3Configuration
import software.amazon.awssdk.services.s3.model.AbortMultipartUploadRequest
@lynas
lynas / spring-read-prop-as-map.md
Created September 5, 2024 10:27
Read value from application.yml as map

application.yml

app:
  vendor:
    port:
      ABL: 8300
      MENEKIS: 5050

Spring

@lynas
lynas / SpringRestClientLog.kt
Created July 8, 2024 13:55
Log request url before making api call
fun getSomething(
param1: String
): ResponseObj? {
return restClient
.get()
.uri(
"/someUrl/{param1}",
param1
)
.httpRequest {
@lynas
lynas / SpringCommandLineRunner.kt
Created June 5, 2024 13:40
@SpringBootApplication
class Application{
@Bean
fun runner() = CommandLineRunner{
println("Hello World")
}
}
@lynas
lynas / hibernateLog.MD
Last active March 11, 2024 08:41
Spring hibernate log hibernate with query param

application yaml (spring 3 hibernate 6)

spring:
  jpa:
    show-sql: true
logging:
  level:
    org.hibernate.orm.jdbc.bind: trace
@lynas
lynas / down_arraow.html
Created February 27, 2023 12:51
<html>
<head>
<style>
#container {
background-color: #FFFFFF;
}
.arrow {
position: absolute;
top: 10%;
@lynas
lynas / numbers.txt
Created February 27, 2021 17:57
01711190994
01730184929
01711378443
01716409799
01711042160
01711468431
01818472880
01743611407
01729685545
01817015379
@lynas
lynas / BootJarWithExternalConfig
Created November 27, 2019 10:33
Run boot jar with external config application.properties
❯ java -jar build/libs/demo-0.0.1-SNAPSHOT.jar --spring.config.location=file:///tmp/application.properties [16:31:02]
@lynas
lynas / JarWithProperties
Created November 27, 2019 10:22
Run boot jar with properties
❯ java -jar build/libs/demo-0.0.1-SNAPSHOT.jar --server.port=8871 [16:18:37]