How to build TinyURL yourself

Thái Lê Trí — Sun, 28 Dec 2025 09:13:59 +0000

I create an side project to implement TinyURL on my own with freedom in my technology choice.

From draft version to final version, performance proved to able to handle
21k read request per sec and
14k create request per sec with single instance.

Functional Requirement (* - Mandatory)

Create unique shorten-url from an alias creation request
Redirect the access from shortenned-url to target URL

Non-Functional Requirement (Not Mandatory, freedom part)
Note: In this project, I try to test some technology to make it fun, fast, stable, durable, and scalable

Able to handle thousands create request per second for single instance
Able to handle thousands access request per second for single instance
Able to fast, and effortless detect invalid access request
Create a performance test for prove the system durable, realiable, and scalable

First version:

Simple spring boot with mysql, support two api:
- POST /api/alias/create
- GET /{alias}
which are satisfy the functional requirement stated above.
Implement NanoId for create random alias
Implement Snowflake ID generation and Base58 convertion from SnowflakeID to character for newly created alias

Second version:
Add primary cache

using LRUCache (capacity 1000) implements from HashMap internally an instance, for fastest accessible
Add secondary cache using Redis with timetolive 1 day for durable and scalable cache support

Third version:

Implement bloomfilter base on Redis version 8.x for fast no-exist alias check.
Implement write-back every 2 sec for caching created request, empower the capacity for fast creation alias.
Implement hibernate batch create, update, sequence allocation for fast saving/persisting

Final version:
Add Grafana, Prometheous, Mysql-Exporter, Redis-Exporter for monitoring
Add K6 script for complex performance test scenario
Add WRK script for extreme performance test scenario

Result:

GIT: https://github.com/thailt/shorten-url

XDocReport cần plugin để tạo placeholder

Thái Lê Trí — Sat, 27 Dec 2025 07:56:39 +0000

Khi làm việc với XDocReport để populate data từ field vào các placeholder trong DocX template, một trong những thứ cần quan tâm là phải tạo các placeholder bằng plugin được phát triển bởi XDocReport. Lý do đằng sau là do Word không đảm bảo việc một word/placeholder luôn luôn được lưu trữ, tokeninze trong internal data structure (zip format, xml format) với cùng định dạng khi rendered trên word.

Ví dụ: placeholder:

{full_name}

có thể được lưu trữ thành:

<tag>{full</tag><tagb>_name}</tagb>

thay vì

{full_name}

vì vậy để replace placeholder bằng các hàm string replace là không hoàn toàn khả thi, và có khả năng gây lỗi bất cứ khi nào.

Ref: https://gpcoder.com/3185-huong-dan-xuat-du-lieu-ra-file-word-pdf-voi-xdocreport/

DEV Community: Thái Lê Trí

How to build TinyURL yourself

XDocReport cần plugin để tạo placeholder