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Microservice Spring with Apache Kafka Kafka is an asynchronous messaging queuing system, but when you have a case in your project that you need to have the result immediately from another service you can do that quite easily. Kafka from the client side produces a message to the server side, then waiting for the server to return back the message exactly what the client wants. It’s identified in the kafka header request named KafkaHeaders.CORRELATION_ID and a topic where the server should send. If the server side produces the same correlation id to the same topic in the request, then the client side will catch that message as its reply. Although you can work with kafka from a different framework and language other than Java and Spring. Here’s in this example i just specifically giving the example of sending and replying kafka messages using Spring Boot. The Project Overview The client-project will send a string message to the server-project over kafka, then the server-project wil

Usually you will need a pair of SSH username and password to connect to a remote server. But there's also another way to connect to the server via SSH but without password, just using a dot pem (example.pem) file. Here's how we usually do on Windows 1. Let’s SSH login using pem to confirm if it’s throwing error or the pem is fine, if error then we need to move to step 2 to fix it: ssh adam@10.0.0.123  -i server-cert.pem And here's the usual error that will throw if your pem file is not ready for SSH login. You need to follow the next step to make your pem certificate ready to login to your server via SSH. 2. Open Windows Explorer, then right-click on the pem file, then select "Properties". Navigate to the "Security" tab, and click "Advanced" 3. Disable inheritance 4. Delete all permissions, so it doesn’t have any permission 5. Now add you as the only only owner. By click button Add and then Select a principal, then Advanced. 6. On the showing p

MySQL and MariaDB password As already mentioned in the title of this blog, this error message sometimes occurred when we are trying to update our root password database, either MySQL or MariaDB, The error says: ERROR 1348 (HY000): Column 'Password' is not updatable This is because if we use this SQL command to update our database root password, and it turn out to be Restricted by MySQL to use update on mysql database. UPDATE mysql.user SET Password=PASSWORD('1234') WHERE User='root'; The solutions for MySQL Error1348 So you can not update a user password using Update commands, to update the password, use ALTER commands instead. like the following. ALTER USER 'root'@'localhost' IDENTIFIED BY '1234'; And then you need to do the flush privileges to commit previous queries (that alter command above) into the system, simply do like this. flush privileges; So now you have your root with password 1234. Although it is recommended to

Spring Boot is program that you can use to develops Spring Framework easier, without the need of using so many hard to handle configuration. This tutorial, we are gonna create Spring Boot Application by using Netbeans IDE. You can of course create Spring Boot Appilcation on Netbeans, but it will be easier if just using plugin for Spring development in Netbeans, 1. Open Netbeans, click tools menu and click plugin. After plugin window opened, click tab Available Plugins and find the "Nb SpringBoot" plugin then install and activate the plugin. 2. After restarting the Netbeans IDE. Now you gonna be able to create a new project with Spring boot application. File > New Project > Under categories, choose Maven > then choose  Spring Boot Basic. Now you can start the development of spring boot application using your Netbeans IDE. Open pom.xml to add spring boot dependencies you want.

flutter button left text Developing a flutter UI is very difficult for a beginner or I think any other technology it’s very intimidating for a starter. I remember my first time trying to make a button in Flutter that had left aligned text in it. I spent a lot of time on how to make it but never made it. Once you are getting familiar with flutter widget or component blocks, you can apply whatever style you want for your app. In html you can just do something like <button style=”text-align:left”>Text</button> but in flutter it is a bit tricky. So here I provide an example on how you can align text inside a flutter button to the left. Flutter button with left align text import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, visualDe