java completable promise example

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.ExecutionException;

import java.util.concurrent.TimeUnit;

import java.util.function.Supplier;

import java.util.concurrent.*;

class Main {

public static void main(String[] args) throws ExecutionException, InterruptedException {

        CompletableFuture<String> whatsYourNameFuture = CompletableFuture.supplyAsync(()-> {

         

           // public String get() {

              System.out.println("in promise");

                try {

                    TimeUnit.SECONDS.sleep(1);

                } catch (InterruptedException e) {

                    throw new IllegalArgumentException(e);

                }

                return "Rajeev";

           // }

        });

        CompletableFuture<String> promiseExample = CompletableFuture.supplyAsync(()-> {

            //public String get() {

              System.out.println("in promise");

                try {

                    TimeUnit.SECONDS.sleep(1);

                } catch (InterruptedException e) {

                    throw new IllegalArgumentException(e);

                }

                return "Kumar";

           // }

        });

      CompletableFuture<String> result = whatsYourNameFuture.thenCombine(promiseExample, (str1, str2) -> {

        String name=str1 + " " + str2;

        return name;

        });

        System.out.println("Value- " + result.get());

        //System.out.println(welcomeText.get());

    }

}

completable feature example

https://github.com/maoyunfei/CompletableFuture-Examples/tree/master/src/main/java/com/maoyunfei/study

String length differnce in php for utf-8 char.

<?php
$name="Si vous n'arrivez pas à récupérer";
echo strlen($name);
echo mb_strlen($name,'UTF-8');
?>

AWS lambda with Java

https://www.baeldung.com/aws-lambda-dynamodb-java

cricute breaker

https://spring.io/guides/gs/circuit-breaker/

completeable feture java

https://netjs.blogspot.com/2018/11/completablefuture-in-java-with-examples.html

java stream api manupalation for arraylist of integer to comma sepertaed

import java.util.*;

import java.util.stream.Collectors;

class Main {

  public static void main(String[] args) {

   List<String> strings = new LinkedList<>();

     strings.add("Java");strings.add("is");

     strings.add("cool");

     String message = String.join(", ", strings);

     System.out.println(message);

      List<Integer> num = new LinkedList<>();

     num.add(2);

     num.add(5);

     num.add(7);

     String message1 =num.stream().map((gameId)-> gameId.toString()).collect(Collectors.joining(","));

     System.out.println(message1);

     //message returned is: "Java is cool"

  }

}

https://www.baeldung.com/java-string-with-separator-to-list