Kibana is an GUI tool for searching and displaying logs provided by Elasticsearch. In this tutorial, I will guide you to install this tool on CentOS! First, just like when installing Elasticsearch, because by default CentOS does not contain Kibana’s installation package, you need to… Read More
After you have installed Nginx, you can deploy your application to be able to access it using the browser. Access by browser here means we only use domain or IP address with the default port of HTTP is 80 or HTTPS 443 without having to… Read More
Nginx is a web server used to run web pages, similar to the Apache HTTP server with high performance. In this tutorial, I will show you how to install Nginx on CentOS! First, because the CentOS default Repository does not contain Nginx’s installation package, you… Read More
Elasticsearch, from its name, can you also guess that it is related to search? It is a search engine built from Apache Lucene that helps us to search quickly using RESTful Web Service. It was developed using Java language and is a distributed system, easily… Read More
I showed you how to build an API Gateway using Zuul Proxy of Spring Cloud Netflix. In this tutorial, I introduce to you another way, using another library in the Spring framework ecosystem, that is, Spring Cloud Gateway! To put it simply, in principle, an… Read More
I showed you how to install the PostgreSQL server. Once the PostgreSQL server is installed, you can also work with it using the command line with the psql tool. But here we have a tool that makes us easier to work with PostgreSQL, with an… Read More
In the introduction to Spring Security, we used a configuration file and declared it with the DelegatingFilterProxy filter class to enable Spring Security for any web application. We can also do this using Java code with the WebSecurityConfigurerAdapter and AbstractSecurityWebApplicationInitializer classes, powered by Spring Security.… Read More
When creating a Spring MVC project using the Spring Tool Suite 3 IDE, you can see, we have a web.xml file that defines the configuration for the DispatcherServlet, the root-context.xml and the servlet-context.xml files define bean configuration in Spring container including ViewResolver, a Controller handle… Read More
When working with applications that use Spring Boot, you will need to write Unit Test for your code. In this tutorial, I will show you how to write Unit Test for the Spring Boot application! First, I will create a simple Spring Boot application for… Read More
When using Keycloak for the authentication of web applications, we will often encounter Web Origin-related errors such as “Access to XMLHttpRequest at ‘http://localhost:8080/auth/realms/huongdanjava/protocol/openid-connect/token’ from origin ‘http://localhost:4200’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.” The reason is that… Read More
