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addok-cluster

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addok-cluster

Clustering addok geocoding capabilities from your Node.js process

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addok-cluster

npm node-current Coverage Status Libraries.io dependency status for latest release

A very fast and efficient way to use addok geocoding capabilities in your Node.js process.

Features

  • Manage multiple addok nodes
  • Fluent JavaScript API
  • 30% more efficient than HTTP calls
  • Fast priority queue (high, medium, low)
  • Supports AbortController
  • Auto-restart nodes
  • Handle multiple Redis databases (round robin)
  • Managed Redis server (optional)

Prerequisites

  • Node.js 18 LTS and above
  • Be able to use ESM
  • A working environment for addok (Python, Redis, dependencies…)

Install

npm install addok-cluster

Configure

import {createCluster} from 'addok-cluster'

const cluster = await createCluster(options)
Environment variable nameOption nameDescription
PYTHON_PATHpythonPathPath to python executable to use
ADDOK_CLUSTER_NUM_NODESnumNodesNumber of nodes to instantiate (default to number of CPUs)
ADDOK_CONFIG_MODULEaddokConfigModulePath to addok configuration file
ADDOK_REDIS_URLaddokRedisUrlConnection string to addok Redis instance (can be an array)
ADDOK_REDIS_DATA_DIRredisDataDirPath to Redis data directory (enable managed Redis)
ADDOK_REDIS_STARTUP_TIMEOUTredisStartupTimeoutDuration in milliseconds allowed to Redis to start (managed Redis only)

Use

Geocode

const params = {
  q: '1 rue de la paix 75002 Paris',
  autocomplete: false,
  lon: null,
  lat: null,
  limit: 5,
  filters: {
    postcode: '75002',
    citycode: '75102'
  }
}

const options = {
  priority: 'medium',
  signal: null
}

const results = await cluster.geocode(params, options)
ParamDescriptionDefault
qText input to geocode (required)
autocompleteAuto-complete mode (boolean)false
lon, latCoordinates of reference position
limitNumber of returned results5
filtersAdditional filters (depend on addok config){}

Reverse geocode

const params = {
  lon: null,
  lat: null,
  limit: 5,
  filters: {
    type: 'housenumber'
  }
}

const options = {
  priority: 'high',
  signal: null
}

const results = await cluster.reverse(params, options)
ParamDescriptionDefault
lon, latCoordinates of reference position (required)
limitNumber of returned results5
filtersAdditional filters (depend on addok config){}

Options

priority: low | medium (default) | high

Define the priority level of the request. Requests are processed following FIFO rule, from high to low.

signal: AbortSignal instance (optional)

If an AbortSignal instance is provided, its status is checked just before forwarding to addok.

Stop cluster

cluster.end()

Sponsorship

This software is maintained by Living Data, thanks to the support of partners such as Etalab (API Adresse) and IGN (Géoplateforme).

FAQs

Package last updated on 23 Sep 2024

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