Created
March 21, 2014 17:31
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mbtiles stopWriting not reentrant?
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| #!/usr/bin/env node | |
| var tilelive = require('tilelive'); | |
| var Mbtiles = require('mbtiles'); | |
| var Http = require('tilelive-http'); | |
| tilelive.protocols['mbtiles:'] = Mbtiles; | |
| tilelive.protocols['http:'] = Http; | |
| var source = new Http("http://tile.openstreetmap.org/{z}/{x}/{y}.png", function(err) { if (err) throw err} ); | |
| var sink = new Mbtiles('test.mbtiles?filetype=png', function(err) { if (err) throw err }); | |
| // mbtiles is asynchronous at loading, so hang fast for a second | |
| setTimeout(function() { | |
| // This is the basics of copying a tile from source to sink | |
| // sink.startWriting(function(err) { | |
| // if (err) throw err; | |
| // source.getTile(0,0,0, function(err, image, headers) { | |
| // if (err) throw err; | |
| // sink.putTile(0,0,0, image, function(err) { | |
| // if (err) throw err; | |
| // sink.stopWriting(function(err) { | |
| // if (err) throw err; | |
| // }); | |
| // }); | |
| // }); | |
| // }); | |
| // starting/stopping writing in parallel doesn't work though, e.g. when one request is waiting for data and another completes first. | |
| sink.startWriting(function(err) { | |
| if (err) throw err; | |
| source.getTile(0,0,0, function(err, image, headers) { | |
| if (err) throw err; | |
| // ensure this has been delayed by a second. | |
| setTimeout(function() { | |
| sink.putTile(0,0,0, image, function(err) { | |
| if (err) throw err; | |
| sink.stopWriting(function(err) { | |
| if (err) throw err; | |
| }); | |
| }); | |
| }, 1000); | |
| // meanwhile, work on another tile | |
| sink.startWriting(function(err) { | |
| if (err) throw err; | |
| source.getTile(2,2,2, function(err, image, headers) { | |
| if (err) throw err; | |
| sink.putTile(2,2,2, image, function (err) { | |
| if (err) throw err; | |
| sink.stopWriting(function(err) { | |
| if (err) throw err; | |
| }); | |
| }); | |
| }); | |
| }); | |
| }); | |
| }); | |
| }, 1000); |
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| { | |
| "name": "mbtiles-reentrant", | |
| "version": "0.0.0", | |
| "description": "", | |
| "main": "index.js", | |
| "scripts": { | |
| "test": "echo \"Error: no test specified\" && exit 1" | |
| }, | |
| "author": "", | |
| "license": "MIT", | |
| "dependencies": { | |
| "tilelive": "4.5.x", | |
| "tilelive-http": "0.1.2", | |
| "mbtiles": "0.4.2" | |
| } | |
| } |
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