In this post, we will take a look how to handle form POST request submission from thymeleaf template in Spring boot and how to bind form elements to a Model object. Typical Form handling For applications that use Thymeleaf views, AJAX may be overkill. But form handling is not simple. At least in the context…
This is a complete guide for using Hazelcast as cache backend in your spring boot application with an example. What is Hazelcast? Hazelcast (Hazelcast-IMDG) is an in-memory data grid. The ideal use-case for Hazelcast-IMDG would be store and replicate cached content between applications. The grid itself is a collection of embedded instances of Hazelcast runtime. Many of…
Storing session details in Redis or database is usually a good idea. However, the default implementation of spring-session-jdbc uses the primary data source to store and retrieve data from the session related tables. This can be a problem when there is a large amount of session related operations to the database. To avoid these situations,…
In this post, We will take a look at setting up Spring Boot Session module using database/JDBC as the backend. Introduction When running multiple instances of the same application, sharing the session data can be a good idea. In this post we will take a look at using a database as a session store for…
In this post, We will take a look at implementing Redis as a Session store in Spring Boot with an example. When running multiple instances behind a load balancer, maintaining sessions can be a problem. For example, let’s say instance-2 receives a login request and establishes a session for the user. However, the second request…
In this post, We will take a look at Customizing Spring Session Cookies with an example. Typical behaviour In session-based authentications like Form-Login and CAS(Central Authentication System), the session is established via cookies. This is done by sending a Set-Cookie header after a successful login similar to the one shown below. Once the browser reads this response…
In this post, we will take a look at Role Based Access Control (RBAC) with Spring boot. Understanding RBAC In an RBAC model there are three key entities. They are, User or Subject – The actors of the system who perform operations. It can represent a physical person, an automated account, or even another application. Role –…
In this post, We will take a look at password encoders in detail with an example. Traditionally, storing passwords were hard. The application will have to encode user passwords and store them in a database. But with password encoders provided by spring security, all of these can be done automatically. Password Encoders are beans that…
In the last post, We have seen how easy it is to set up an in-memory UserDetailsService and dynamically add users to the applications. However, we all know that the implementation is only good for demos and short-lived applications. Once these applications are stopped, All the information about the users is lost. This is why…
In this post, we will take a look at how the default in-memory UserDetailsService works in Spring Boot application. Default behaviour The default autoconfiguration provides an InMemoryUserDetailsManager that generates a single user for the application to support. We can override these user properties to an extent with changes to application.properties file. For instance, you can change the default username…
