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72 lines
3.4 KiB
CoffeeScript
72 lines
3.4 KiB
CoffeeScript
request = require "request"
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_ = require "underscore"
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logger = require "logger-sharelatex"
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settings = require "settings-sharelatex"
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metrics = require("metrics-sharelatex")
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rclient = require("redis-sharelatex").createClient(settings.redis.documentupdater)
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Keys = settings.redis.documentupdater.key_schema
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module.exports = DocumentUpdaterManager =
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getDocument: (project_id, doc_id, fromVersion, callback = (error, exists, doclines, version) ->) ->
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timer = new metrics.Timer("get-document")
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url = "#{settings.apis.documentupdater.url}/project/#{project_id}/doc/#{doc_id}?fromVersion=#{fromVersion}"
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logger.log {project_id, doc_id, fromVersion}, "getting doc from document updater"
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request.get url, (err, res, body) ->
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timer.done()
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if err?
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logger.error {err, url, project_id, doc_id}, "error getting doc from doc updater"
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return callback(err)
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if 200 <= res.statusCode < 300
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logger.log {project_id, doc_id}, "got doc from document document updater"
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try
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body = JSON.parse(body)
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catch error
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return callback(error)
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callback null, body?.lines, body?.version, body?.ranges, body?.ops
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else if res.statusCode in [404, 422]
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err = new Error("doc updater could not load requested ops")
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err.statusCode = res.statusCode
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logger.warn {err, project_id, doc_id, url, fromVersion}, "doc updater could not load requested ops"
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callback err
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else
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err = new Error("doc updater returned a non-success status code: #{res.statusCode}")
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err.statusCode = res.statusCode
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logger.error {err, project_id, doc_id, url}, "doc updater returned a non-success status code: #{res.statusCode}"
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callback err
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flushProjectToMongoAndDelete: (project_id, callback = ()->) ->
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# this method is called when the last connected user leaves the project
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logger.log project_id:project_id, "deleting project from document updater"
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timer = new metrics.Timer("delete.mongo.project")
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# flush the project in the background when all users have left
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url = "#{settings.apis.documentupdater.url}/project/#{project_id}?background=true" +
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(if settings.shutDownInProgress then "&shutdown=true" else "")
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request.del url, (err, res, body)->
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timer.done()
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if err?
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logger.error {err, project_id}, "error deleting project from document updater"
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return callback(err)
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else if 200 <= res.statusCode < 300
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logger.log {project_id}, "deleted project from document updater"
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return callback(null)
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else
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err = new Error("document updater returned a failure status code: #{res.statusCode}")
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err.statusCode = res.statusCode
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logger.error {err, project_id}, "document updater returned failure status code: #{res.statusCode}"
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return callback(err)
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queueChange: (project_id, doc_id, change, callback = ()->)->
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allowedKeys = [ 'doc', 'op', 'v', 'dupIfSource', 'meta', 'lastV', 'hash']
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change = _.pick change, allowedKeys
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jsonChange = JSON.stringify change
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if jsonChange.indexOf("\u0000") != -1
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error = new Error("null bytes found in op")
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logger.error err: error, project_id: project_id, doc_id: doc_id, jsonChange: jsonChange, error.message
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return callback(error)
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doc_key = "#{project_id}:#{doc_id}"
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# Push onto pendingUpdates for doc_id first, because once the doc updater
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# gets an entry on pending-updates-list, it starts processing.
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rclient.rpush Keys.pendingUpdates({doc_id}), jsonChange, (error) ->
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return callback(error) if error?
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rclient.rpush "pending-updates-list", doc_key, callback
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