redis-tile-store

A module to extend express-tile-cache memory cache to use Redis.

Overview

redis-tile-store is based on the conception of TJ's connect-redis and provides redis store functionality to a tile source in express-tile-cache

var redisTileStore = require("redis-tile-store");

It also supports key pairs expiring, disabled by default. Invoke setTtl(###) to enable.

Installation

npm install redis-tile-store --save

Usage

Create a new instance of the storage object with S3 configuration and assign it to a tile source configuration:

var express = require("express"),
  tilecache = require("express-tile-cache"),
  redisTileStore = require("redis-tile-store"),
  app = express();

var redisStore = redisTileStore({
  port: 6379,
  host: "redis-url-here",
  prefix: "tiles" //should you need one
})
var argenmaptiles = {
  urlTemplate: "http://wms.ign.gob.ar/geoserver/gwc/service/tms/1.0.0",
  store: redisStore
}

app.use(tilecache(argenmaptiles));

Options

• ttl {Number}: optional - seconds to keep cache valid for each tile. Defaults to 10 days (864000 seconds)
• port
• host
• prefix

API

Module

The redis-tile-store module returns a function.

var redisTileStore = require("redis-tile-store");

redis-tile-store.set(hash, data, callback)

Arguments

• hash - {String} Required: Identifier string for the tile to store

• data - {Object} Required: related dataset of the tile.

• callback - {Function}

redis-tile-store.get(hash, callback)

Arguments

• hash - {String} Required: Identifier string for the tile to store

• callback - {Function} Required {Function}. This function will bring back the properties reported by S3 after uploading the file:

  • Location: 'https://bucketName.s3.amazonaws.com/filename.ext',
  • Bucket: 'bucketName',
  • Key: 'filename.ext',
  • ETag: 'bf2acbedf84207d696c8da7dbb205b9f-5'

redis-tile-store.setTtl(minutes)

Enables TTL and sets expiring time. Calling this method enables TTL usage, off by default.

• minutes {Number}: minutes the key pair kept alive

Changelog

1.2.0

• Bugfixing
• TTL now in seconds

1.1.1

• Added setTtl method for setting and enabling key pairs expiring

1.1.0-beta

• Use of SETEX command, setting TTL enables key pairs expire

#License

The MIT License (MIT)

Copyright (c) 2015 Christian Gastrell <cgastrell@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.