autocomplete

Simple autocomplete service

Configuration

Application supports configuration via environment variables:

HOST=0.0.0.0
PORT=8000
TOP=5  # amount of words in server response
# persistent storage 
DB_HOST=mongo
DB_PORT=27017
DB_USER=autocomplete
DB_PASSWORD=autocomplete

Installation

With docker

$> docker pull freundallein/autocomplete

With source

$> git clone git@github.com:freundallein/autocomplete.git
$> cd autocomplete
$> pip install -r requirements.txt

Usage

Docker-compose

version: "3.5"

networks:
  network:
    name: example-network
    driver: bridge

services:
  autocomplete:
    image: freundallein/autocomplete:latest
    container_name: autocomplete
    restart: always
    environment:
      - HOST=0.0.0.0
      - PORT=8000
      - TOP=5
      - DB_HOST=mongo
      - DB_PORT=27017
      - DB_USER=autocomplete
      - DB_PASSWORD=autocomplete
    depends_on: 
      - mongo
    networks: 
      - network
    ports:
      - 8000:8000

  mongo:
    image: mongo
    container_name: mongodb
    restart: always
    environment:
      - MONGO_INITDB_ROOT_USERNAME=autocomplete
      - MONGO_INITDB_ROOT_PASSWORD=autocomplete
    command: --wiredTigerCacheSizeGB 1.5
    volumes:
      -  ./localdb:/data/db
    networks: 
      - network

After start you have service with loaded to persistent storage corpus of english words with some frequency. You can make http requests:

GET 0.0.0.0:8000/?prefix=a&top=3

will return
{"words": [{"word": "a", "frequency": 155432}, {"word": "are", "frequency": 49961}, {"word": "and", "frequency": 41182}], "len": 3}

Also you can add new words or update frequency of existing with

curl -X POST -d '{"word":"Example"}' -H "Content-Type: application/json"  0.0.0.0:8000

Metrics

Prometheus metrics are available on /metrics.

Healthcheck

Service healthcheck is avaliable on /healthz.
Return 200 if service ready esle 500.

Good luck.