Author: Sergio Lema
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Circuit Breaker: Hystrix vs Resilience4J
In this post I’ll show how to use the Circuit Breaker pattern with Hystrix and with Resilience4J.
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Mapping and Validating with Marshmallow
In this article I explain the 3-tier architecture. From that I explain the need to have a mapping with Marshmallow. I will use Marshmallow to map my database entities to JSON objects.
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Message Queuing with Apache Kafka and Spring Cloud
In this article I will show how to configure Spring Cloud to publish and read messages from Apache Kafka for the Message Queuing pattern. I will show how to configure Spring Cloud for both the raw Apache Kafka dependency and for the Stream dependency.
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SQLAlchemy
In this article I show how to configure SQLAlchemy in a Flask backend. I also show how to create entities which reflect some tables in a database. And show how some relationships are managed with SQLAlchemy as one-to-one, one-to-many and many-to-many.
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Basic Authentication & JWT
In this article I show how to secure a Flask backend with Basic Authentication and also with JWT. I will show the usage of the library flask-http-auth for the Basic Authentication and the token based Authentication. Then, I will add the library pyjwt to encode and decode a JWT.
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Log4Shell Vulnerability
In this article I show how the Log4Shell vulnerability can impact. I show how the JNDI commands are intercepted with an LDAP server, and how to protect against this vulnerability.
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Dependency Management with Poetry
In this article I show the usage of Poetry and Python to manage the dependencies. I show how to create a Poetry project, how to search and add dependencies and how to manage virtual environments of Python with Poetry.
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Flask Backend Setup
In this article I show the setup of a Flask and Python backend. I show the structure of a Flask project, how to add routes to Flask, how to group routes with Blueprints and how to handle errors.
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Slf4j, Lockback and Log4J2
In this article I show how to write logs in a Spring Boot application. I also show how to configure the Logback and Log4J2 loggers.
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Store the HTTP Session into Redis
In this article I show how to store the HTTP session into Redis with Spring Boot. I show the necessary dependencies and how to configure Spring Boot to not have the HTTP session stored only in the application.
The Dev World - Sergio Lema 