Tag: java

All the articles with the tag "java".

• Notes from Reading the Docker Documentation

  16 Apr, 2022

  Notes on Docker’s getting-started tutorial cover building images, starting containers, persisting data, and composing multi-container applications. Topics include RUN versus CMD in Dockerfiles, named volumes and bind mounts, Docker Compose, and basic Docker Desktop operations.

• Getting Started with JMX: JMX Exporter Monitoring and OpenTelemetry Integration

  15 Mar, 2022

  Demonstrates JMX registration, attribute queries, and JConsole operations with a custom MXBean, then introduces metrics collection through JMX Exporter, OpenTelemetry Collector, and Prometheus. It also discusses MBean filtering and scrape performance, and OpenTelemetry JMX integration options.

• Sending Email with Velocity in Spring Boot

  3 Mar, 2022

  Velocity references, directives, variable assignment, and resource loading are introduced through rendering order emails in Spring Boot. JavaMailSender and SMTP configuration for a 163.com mailbox demonstrate building, sending, and verifying HTML email.

• Implementing the OAuth 2.0 Authorization Code Flow

  15 Dec, 2021

  A custom OAuth 2.0 authorization code implementation using RESTEasy, JPA, CDI, and JWT connects user consent, code generation, callbacks, and token exchange. The article shows signature and permission checks on the resource server, along with the project structure, deployment steps, and complete example code.