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Merge pull request #37 from sharelatex/bg-limit-ops-in-lock

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put a limit on the number of ops per iteration
This commit is contained in:
Brian Gough 2017-12-14 14:21:14 +00:00 committed by GitHub
commit 3d57976ef9
3 changed files with 9 additions and 6 deletions
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6
services/document-updater/app/coffee/RealTimeRedisManager.coffee
View file

@ -3,11 +3,13 @@ rclient = require("redis-sharelatex").createClient(Settings.redis.realtime)
Keys = Settings.redis.realtime.key_schema
logger = require('logger-sharelatex')
MAX_OPS_PER_ITERATION = 8 # process a limited number of ops for safety
module.exports = RealTimeRedisManager =
getPendingUpdatesForDoc : (doc_id, callback)->
multi = rclient.multi()
multi.lrange Keys.pendingUpdates({doc_id}), 0 , -1
multi.del Keys.pendingUpdates({doc_id})
multi.lrange Keys.pendingUpdates({doc_id}), 0, (MAX_OPS_PER_ITERATION-1)
multi.ltrim Keys.pendingUpdates({doc_id}), MAX_OPS_PER_ITERATION, -1
multi.exec (error, replys) ->
return callback(error) if error?
jsonUpdates = replys[0]

1
services/document-updater/app/coffee/UpdateManager.coffee
View file

@ -47,6 +47,7 @@ module.exports = UpdateManager =
profile = new Profiler("fetchAndApplyUpdates", {project_id, doc_id})
RealTimeRedisManager.getPendingUpdatesForDoc doc_id, (error, updates) =>
return callback(error) if error?
logger.log {project_id: project_id, doc_id: doc_id, count: updates.length}, "processing updates"
if updates.length == 0
return callback()
profile.log("getPendingUpdatesForDoc")

8
services/document-updater/test/unit/coffee/RealTimeRedisManager/RealTimeRedisManagerTests.coffee
View file

@ -26,7 +26,7 @@ describe "RealTimeRedisManager", ->
describe "getPendingUpdatesForDoc", ->
beforeEach ->
@rclient.lrange = sinon.stub()
@rclient.del = sinon.stub()
@rclient.ltrim = sinon.stub()
describe "successfully", ->
beforeEach ->
@ -40,12 +40,12 @@ describe "RealTimeRedisManager", ->
it "should get the pending updates", ->
@rclient.lrange
.calledWith("PendingUpdates:#{@doc_id}", 0, -1)
.calledWith("PendingUpdates:#{@doc_id}", 0, 7)
.should.equal true
it "should delete the pending updates", ->
@rclient.del
.calledWith("PendingUpdates:#{@doc_id}")
@rclient.ltrim
.calledWith("PendingUpdates:#{@doc_id}", 8, -1)
.should.equal true
it "should call the callback with the updates", ->