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Showing posts from March, 2019

How To Synchronize Database Using Navicat

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Navicat is a database management tool provided by Premium Soft. I like Navicat so much, it is cool, easy to use and really fast in performance, i mean if i compare with like for example Workbench, it is outperformed it. And Navicat has lot of cool features, one that i really like much is the tool which we can synchronize the database from our local development computer to our server production, when you don't need to manually like for example changing or adding your database structure. There are 2 different synchronizing tools, the one is for synchronizing the structure, second is for synchronizing the data. 1. To synchronize your database, the first thing you need to do is connect both your localhost and your server. 2. Go to Tools menu and select either Data synchronization or Structure synchronization 3. On Source section choose your most updated database, and on target choose the database that you want to update 4. Click next, then compare, wait until it finish the p
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How To HTML Parsing With PHP Xpath Query

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I am doing a lot of PHP programming, it is easier than any other language, you don't need any setup to get started with PHP, in Windows there's program called XAMPP, and just about all you need to start a PHP programming. Because the simplicity, I've created many projects using PHP, and it's fun for creating small projects. Enough for the intro, here's some handy tips when you want to do some HTML parsing. 1. To get start, using file_get_contents function to get the HTML content of the page you want to parse, save it in a variable call $contents, whatever you name it. $contents = file_get_contents("https://example.com/the-page"); 2. Declare the DOMDocument class, name the variable $dochtml, again whatever you want. $dochtml = new DOMDocument(); 3. Call the loadHTML, pass the contents from file_get_contents to its parameter. $dochtml->loadHTML($contents); 4. Declare DOMXpath, pass a dom object to it's constructor. $xpath = new DOMX
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MySQL Allow Remote Connection

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MySQL is undoubtedly one of the best database server exists, it is widely used by many of companies or even for just personal project around the world, because it is free and yet capable of doing something bigger. For this tutorial we will discuss about how you can allow your MySQL server to be managed by local computer. The reason sometimes, especially for me for doing this approach is, when we want to use an advanced database management tools on our local computer, let's say we have Navicat or Workbench. Without further ado, these are steps how you can do that. My server is Ubuntu and my local computer is Windows, but it think there's no much different. 1. Change bind address on MySQL configuration from localhost to your server IP. Login ssh to your server, and you can use vim for editing "mysqld.cnf" file. sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf # Replace xxx with your IP Address  bind-address        = xxx.xxx.xxx.xxx Restart MySQL. sudo /etc/ini
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Spring Kafka - how to use ReplyingKafkaTemplate send and reply synchronously

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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
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How To Connect SSH Using PEM Certificate On Windows

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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
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ERROR 1348 Column Password Is Not Updatable When Updating MySQL Root Password

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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
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How To Create Spring Boot Project Using Netbeans

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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.
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Flutter Button With Left Align Text and Icon

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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
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