mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-21 20:47:08 -05:00
342 lines
10 KiB
CoffeeScript
342 lines
10 KiB
CoffeeScript
Settings = require "settings-sharelatex"
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fs = require("fs")
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mongojs = require("mongojs")
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ObjectId = mongojs.ObjectId
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db = mongojs(Settings.mongo.url, ['docs','docHistory', 'docHistoryStats'])
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_ = require("underscore")
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async = require("async")
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exec = require("child_process").exec
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bson = require('bson')
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BSON = new bson()
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logger = {
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log: ->
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err: ->
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}
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needToExit = false
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handleExit = () ->
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needToExit = true
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console.log('Got signal. Shutting down.')
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process.on 'SIGINT', handleExit
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process.on 'SIGHUP', handleExit
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finished_docs_path = "/tmp/finished-docs-3"
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all_docs_path = "/tmp/all-docs-3"
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unmigrated_docs_path = "/tmp/unmigrated-docs-3"
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finished_docs = {}
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if fs.existsSync(finished_docs_path)
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for id in fs.readFileSync(finished_docs_path,'utf-8').split("\n")
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finished_docs[id] = true
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getAndWriteDocids = (callback)->
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console.log "finding all doc id's - #{new Date().toString()}"
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db.docs.find {}, {_id:1}, (err, ids)->
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console.log "total found docs in mongo #{ids.length} - #{new Date().toString()}"
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ids = _.pluck ids, '_id'
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ids = _.filter ids, (id)-> id?
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fileData = ids.join("\n")
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fs.writeFileSync all_docs_path + ".tmp", fileData
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fs.renameSync all_docs_path + ".tmp", all_docs_path
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callback(err, ids)
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loadDocIds = (callback)->
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console.log "loading doc ids from #{all_docs_path}"
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data = fs.readFileSync all_docs_path, "utf-8"
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ids = data.split("\n")
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console.log "loaded #{ids.length} doc ids from #{all_docs_path}"
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callback null, ids
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getDocIds = (callback)->
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exists = fs.existsSync all_docs_path
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if exists
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loadDocIds callback
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else
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getAndWriteDocids callback
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markDocAsProcessed = (doc_id, callback)->
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finished_docs[doc_id] = true
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fs.appendFile finished_docs_path, "#{doc_id}\n", callback
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markDocAsUnmigrated = (doc_id, callback)->
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console.log "#{doc_id} unmigrated"
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markDocAsProcessed doc_id, (err)->
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fs.appendFile unmigrated_docs_path, "#{doc_id}\n", callback
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checkIfDocHasBeenProccessed = (doc_id, callback)->
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callback(null, finished_docs[doc_id])
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processNext = (doc_id, callback)->
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if !doc_id? or doc_id.length == 0
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return callback()
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if needToExit
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return callback(new Error("graceful shutdown"))
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checkIfDocHasBeenProccessed doc_id, (err, hasBeenProcessed)->
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if hasBeenProcessed
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console.log "#{doc_id} already processed, skipping"
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return callback()
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PackManager._packDocHistory doc_id, {}, (err) ->
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if err?
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console.log "error processing #{doc_id}"
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markDocAsUnmigrated doc_id, callback
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else
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markDocAsProcessed doc_id, callback
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updateIndexes = (callback) ->
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async.series [
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(cb) ->
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console.log "create index"
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db.docHistory.ensureIndex { project_id: 1, "meta.end_ts": 1, "meta.start_ts": -1 }, { background: true }, cb
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(cb) ->
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console.log "drop index"
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db.docHistory.dropIndex { project_id: 1, "meta.end_ts": 1 }, cb
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(cb) ->
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console.log "drop index"
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db.docHistory.dropIndex { project_id: 1, "pack.0.meta.end_ts": 1, "meta.end_ts": 1}, cb
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], (err, results) ->
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console.log "all done"
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callback(err)
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exports.migrate = (client, done = ->)->
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getDocIds (err, ids)->
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totalDocCount = ids.length
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alreadyFinishedCount = Object.keys(finished_docs).length
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t0 = Date.now()
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printProgress = () ->
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count = Object.keys(finished_docs).length
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processedFraction = (count-alreadyFinishedCount)/totalDocCount
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remainingFraction = (totalDocCount-count)/totalDocCount
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t = Date.now()
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dt = (t-t0)*remainingFraction/processedFraction
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estFinishTime = new Date(t + dt)
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console.log "completed #{count}/#{totalDocCount} processed=#{processedFraction.toFixed(2)} remaining=#{remainingFraction.toFixed(2)} elapsed=#{(t-t0)/1000} est Finish=#{estFinishTime}"
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interval = setInterval printProgress, 3*1000
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nextId = null
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testFn = () ->
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return false if needToExit
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id = ids.shift()
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while id? and finished_docs[id] # skip finished
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id = ids.shift()
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nextId = id
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return nextId?
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executeFn = (cb) ->
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processNext nextId, cb
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async.whilst testFn, executeFn, (err)->
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if err?
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console.error err, "at end of jobs"
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else
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console.log "finished at #{new Date}"
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clearInterval interval
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done(err)
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exports.rollback = (client, done)->
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done()
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# process.nextTick () ->
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# exports.migrate () ->
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# console.log "done"
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DAYS = 24 * 3600 * 1000 # one day in milliseconds
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# copied from track-changes/app/coffee/PackManager.coffee
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PackManager =
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MAX_SIZE: 1024*1024 # make these configurable parameters
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MAX_COUNT: 512
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convertDocsToPacks: (docs, callback) ->
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packs = []
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top = null
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docs.forEach (d,i) ->
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# skip existing packs
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if d.pack?
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top = null
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return
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sz = BSON.calculateObjectSize(d)
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# decide if this doc can be added to the current pack
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validLength = top? && (top.pack.length < PackManager.MAX_COUNT)
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validSize = top? && (top.sz + sz < PackManager.MAX_SIZE)
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bothPermanent = top? && (top.expiresAt? is false) && (d.expiresAt? is false)
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bothTemporary = top? && (top.expiresAt? is true) && (d.expiresAt? is true)
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within1Day = bothTemporary && (d.meta.start_ts - top.meta.start_ts < 24 * 3600 * 1000)
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if top? && validLength && validSize && (bothPermanent || (bothTemporary && within1Day))
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top.pack = top.pack.concat {v: d.v, meta: d.meta, op: d.op, _id: d._id}
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top.sz += sz
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top.n += 1
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top.v_end = d.v
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top.meta.end_ts = d.meta.end_ts
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top.expiresAt = d.expiresAt if top.expiresAt?
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return
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else
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# create a new pack
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top = _.clone(d)
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top.pack = [ {v: d.v, meta: d.meta, op: d.op, _id: d._id} ]
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top.meta = { start_ts: d.meta.start_ts, end_ts: d.meta.end_ts }
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top.sz = sz
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top.n = 1
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top.v_end = d.v
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delete top.op
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delete top._id
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packs.push top
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callback(null, packs)
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checkHistory: (docs, callback) ->
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errors = []
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prev = null
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error = (args...) ->
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errors.push args
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docs.forEach (d,i) ->
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if d.pack?
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n = d.pack.length
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last = d.pack[n-1]
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error('bad pack v_end', d) if d.v_end != last.v
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error('bad pack start_ts', d) if d.meta.start_ts != d.pack[0].meta.start_ts
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error('bad pack end_ts', d) if d.meta.end_ts != last.meta.end_ts
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d.pack.forEach (p, i) ->
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prev = v
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v = p.v
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error('bad version', v, 'in', p) if v <= prev
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#error('expired op', p, 'in pack') if p.expiresAt?
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else
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prev = v
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v = d.v
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error('bad version', v, 'in', d) if v <= prev
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if errors.length
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callback(errors)
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else
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callback()
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insertPack: (packObj, callback) ->
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bulk = db.docHistory.initializeOrderedBulkOp()
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doc_id = packObj.doc_id
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expect_nInserted = 1
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expect_nRemoved = packObj.pack.length
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logger.log {doc_id: doc_id}, "adding pack, removing #{expect_nRemoved} ops"
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bulk.insert packObj
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ids = (op._id for op in packObj.pack)
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bulk.find({_id:{$in:ids}}).remove()
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bulk.execute (err, result) ->
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if err?
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logger.error {doc_id: doc_id}, "error adding pack"
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callback(err, result)
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else if result.nInserted != expect_nInserted or result.nRemoved != expect_nRemoved
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logger.error {doc_id: doc_id, result}, "unexpected result adding pack"
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callback(new Error(
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msg: 'unexpected result'
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expected: {expect_nInserted, expect_nRemoved}
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), result)
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else
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db.docHistoryStats.update {doc_id:doc_id}, {
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$inc:{update_count:-expect_nRemoved},
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$currentDate:{last_packed:true}
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}, {upsert:true}, () ->
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callback(err, result)
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# retrieve document ops/packs and check them
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getDocHistory: (doc_id, callback) ->
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db.docHistory.find({doc_id:ObjectId(doc_id)}).sort {v:1}, (err, docs) ->
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return callback(err) if err?
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# for safety, do a consistency check of the history
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logger.log {doc_id}, "checking history for document"
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PackManager.checkHistory docs, (err) ->
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return callback(err) if err?
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callback(err, docs)
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#PackManager.deleteExpiredPackOps docs, (err) ->
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# return callback(err) if err?
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# callback err, docs
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packDocHistory: (doc_id, options, callback) ->
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if typeof callback == "undefined" and typeof options == 'function'
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callback = options
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options = {}
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LockManager.runWithLock(
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"HistoryLock:#{doc_id}",
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(releaseLock) ->
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PackManager._packDocHistory(doc_id, options, releaseLock)
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, callback
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)
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_packDocHistory: (doc_id, options, callback) ->
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logger.log {doc_id},"starting pack operation for document history"
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PackManager.getDocHistory doc_id, (err, docs) ->
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return callback(err) if err?
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origDocs = 0
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origPacks = 0
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for d in docs
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if d.pack? then origPacks++ else origDocs++
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PackManager.convertDocsToPacks docs, (err, packs) ->
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return callback(err) if err?
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total = 0
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for p in packs
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total = total + p.pack.length
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logger.log {doc_id, origDocs, origPacks, newPacks: packs.length, totalOps: total}, "document stats"
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if packs.length
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if options['dry-run']
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logger.log {doc_id}, 'dry-run, skipping write packs'
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return callback()
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PackManager.savePacks packs, (err) ->
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return callback(err) if err?
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# check the history again
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PackManager.getDocHistory doc_id, callback
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else
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logger.log {doc_id}, "no packs to write"
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# keep a record that we checked this one to avoid rechecking it
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db.docHistoryStats.update {doc_id:doc_id}, {
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$currentDate:{last_checked:true}
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}, {upsert:true}, () ->
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callback null, null
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DB_WRITE_DELAY: 100
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savePacks: (packs, callback) ->
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async.eachSeries packs, PackManager.safeInsert, (err, result) ->
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if err?
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logger.log {err, result}, "error writing packs"
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callback err, result
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else
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callback()
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safeInsert: (packObj, callback) ->
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PackManager.insertPack packObj, (err, result) ->
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setTimeout () ->
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callback(err,result)
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, PackManager.DB_WRITE_DELAY
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deleteExpiredPackOps: (docs, callback) ->
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now = Date.now()
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toRemove = []
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toUpdate = []
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docs.forEach (d,i) ->
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if d.pack?
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newPack = d.pack.filter (op) ->
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if op.expiresAt? then op.expiresAt > now else true
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if newPack.length == 0
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toRemove.push d
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else if newPack.length < d.pack.length
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# adjust the pack properties
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d.pack = newPack
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first = d.pack[0]
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last = d.pack[d.pack.length - 1]
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d.v_end = last.v
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d.meta.start_ts = first.meta.start_ts
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d.meta.end_ts = last.meta.end_ts
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toUpdate.push d
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if toRemove.length or toUpdate.length
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bulk = db.docHistory.initializeOrderedBulkOp()
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toRemove.forEach (pack) ->
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console.log "would remove", pack
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#bulk.find({_id:pack._id}).removeOne()
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toUpdate.forEach (pack) ->
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console.log "would update", pack
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#bulk.find({_id:pack._id}).updateOne(pack);
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bulk.execute callback
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else
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callback()
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