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Baeldung Author

Hamid Reza Sharifi

I’m an experienced Software Engineer with a demonstrated history of working in the computer software industry. I received my Ph.D. degree in Computer Software Engineering from Islamic Azad University, Science And Research Branch in 2018. Over the past few years, I have been working mainly on projects built around Java, Spring Boot, Agile Methodologies, REST API, Microservice, and Keycloak IAM. Also, I’m very interested in learning new technologies and the latest practices in the industry.

Here's what I've written (so far):

Baeldung on Java

All
Spring Boot (4)
Security (4)
Spring Security (2)
Architecture (2)
Testing (1)
Spring Data (1)
Spring Cloud (1)
Spring (1)
Programming (1)
Logging (1)

Extract CN From X509 Certificate in Java

Filed under Security

Learn several approaches to extracting the CN value of a certificate file.

Securing Spring Boot API With API Key and Secret

Filed under Spring Boot, Spring Security

A quick and practical guide to securing Spring Boot APIs with API keys and secrets.

Introduction to Spring Modulith

Filed under Architecture, Spring Boot

A quick and practical guide to Spring Modulith.

Custom Protocol Mapper with Keycloak

Filed under Security

A quick and practical guide to using custom protocol mappers with Keycloak.

Spring Boot Logback and Log4j2 Extensions

Filed under Logging, Spring Boot

A quick and practical guide to Spring Boot and its logging extensions.

Running Spring Boot Applications with the Embedded Camunda Engine

Filed under Spring Boot

Learn how to leverage the embedded Camunda engine into the Spring Boot application.

Get Information About a PDF in Java

Filed under Programming

Learn different ways of getting information about a PDF file using the iText and PDFBox libraries in Java.

Multitenancy With Spring Data JPA

Filed under Architecture, Spring Data

Building a multi-tenant system in Spring requires keeping data from one tenancy apart from another. We look how to separate requests into different databases by tenant, and how to validate that the requests belong to the correct tenancy.

Get Keycloak User ID in Spring

Filed under Spring Security

Learn to get the Keycloak user ID in a Spring Boot application.

Provide an OAuth2 Token to a Feign Client

Filed under Security, Spring Cloud

Learn to provide an OAuth2 token to a feign client.

Failed to Load ApplicationContext for JUnit Test of Spring Controller

Filed under Spring, Testing

Learn about the “Failed to Load ApplicationContext” error message when running Junit tests with the Spring Controller, and how to fix it.