Blog

Mert Özen's blog posts on software development, backend, frontend, and DevOps.

Series

.NET Core Web API 36 Angular 31 JavaScript Basics 19 JavaScript Intermediate 18 JavaScript Advanced 16 TypeScript Basics 14 TypeScript Intermediate 14 TypeScript Advanced 12 Entity Framework Core 28 Dapper 16 Git & GitHub 29 Web Security (OWASP Top 10) 21 LLM Fundamentals 20 C# Fundamentals 20 Object-Oriented Programming in C# 16 C# Collections and Generics 11 LINQ 17 Asynchronous Programming in C# 17 Advanced C# 14 C# Versions 6 Solution Patterns 22 SOLID and Design Principles 12 Clean Code 13 Design Patterns 23 UML and Modeling 18 Introduction to Software Architecture 9 Clean, Onion and Hexagonal Architecture 8 Vertical Slice Architecture 6 Domain-Driven Design 12 CQRS and Event Sourcing 10 Messaging and Event-Driven Architecture 9 Modular Monolith 2 Microservices 10 UI Architecture Patterns 9 Architecture Decisions 7 System Design 15 Distributed Systems Fundamentals 11 Background Jobs and Scheduled Jobs 11 Working with Message Queues 14 Logging in .NET 10 Caching 10 Real-time Applications 9 ASP.NET Core MVC and Razor Pages 13 CI/CD Fundamentals 8 GitHub Actions 16 Deployment Strategies 9

2 posts found #cron

Newest Oldest Popular

DevOps PART 02

GitHub Actions Triggers: push, pull_request, workflow_dispatch, schedule and Filters

The events and filters under on decide when a workflow runs: branches, tags, paths and ! negation for push and pull_request, activity types, workflow_dispatch inputs, timezone-aware schedules, workflow_run, repository_dispatch and merge_group. With real output we show the trap of reading booleans via github.event.inputs, the trigger mistakes actionlint catches, and why act does not evaluate filters.

8 Nov 2026 12 min 1

Backend PART 04

Cron Expressions: Unix 5-Field, 6-Field with Seconds, Quartz Format and Time Zone/DST Pitfalls

Unix cron has 5 fields, Quartz wants 6–7 fields starting with seconds and counts weekdays as 1=Sunday; Quartz 4 rejects "0 0 * * *" with the default parser and accepts it with CronFormat.Unix. Across DST, a daily 02:30 job runs once at 03:00 in spring and only once in autumn, while interval jobs run twice in the repeated hour. You can write your own cron scheduler on TimeProvider and test it with FakeTimeProvider.

8 Nov 2026 13 min 6