https://github.com/soapdog/esri-tile-cacher

A little microservice based on Tarantool to cache ESRI ArcGIS tiles. This is a toy.
https://github.com/soapdog/esri-tile-cacher

arcgis gis lua microservice poc tarantool toy

Last synced: 19 days ago
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A little microservice based on Tarantool to cache ESRI ArcGIS tiles. This is a toy.

• Host: GitHub
• URL: https://github.com/soapdog/esri-tile-cacher
• Owner: soapdog
• Created: 2017-05-18T00:35:51.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-05-18T02:45:18.000Z (over 7 years ago)
• Last Synced: 2024-04-15T03:28:30.250Z (9 months ago)
• Topics: arcgis, gis, lua, microservice, poc, tarantool, toy
• Language: Lua
• Size: 174 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# esri-tile-cacher

This is a simple [tarantool](https://tarantool.org)-based application to cache map tiles from ESRI ArcGIS.

It is built with [Lua](http://www.lua.org).

It has two storage spaces, **hot** and **cold**, the first one is stored in RAM

and is very fast. The second is stored on disk and is slower. Tiles which have

been accessed recently are moved to the **hot storage**, as they grow stale they

are moved to the **cold stoage**. Currently the treshold is set to two minutes.

The collection of tiles from hot to cold storage is done using [fibers](https://tarantool.org/doc/1.7/reference/reference_lua/fiber.html) which

are cooperative lightweight threads. In a real scenario, another process (or even

  more than one can be used to collect tiles).

### This is not a real product, this is a proof-of-concept created in couple minutes.

# Requirements

* Tarantool 1.7+

* tarantool-fiber

* tarantool-http

# Running it

To run the little server use:

```$ tarantool app.lua```

Call it with _curl_ like:

```$ curl -v "http://localhost:8080/ArcGIS/cache/World_Street_Map/5/17/19"```

If that tile is not cached, then it will request from ArcGIS and cache.

![Screen from the app](screen.png)