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125 lines
No EOL
3.3 KiB
CoffeeScript
125 lines
No EOL
3.3 KiB
CoffeeScript
Settings = require "settings-sharelatex"
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async = require "async"
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_ = require "underscore"
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logger = require "logger-sharelatex"
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class Client
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constructor: (@clients) ->
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multi: () ->
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return new MultiClient(
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@clients.map (client) -> {
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rclient: client.rclient.multi()
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key_schema: client.key_schema
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primary: client.primary
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driver: client.driver
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}
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)
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class MultiClient
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constructor: (@clients) ->
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exec: (callback) ->
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jobs = @clients.map (client) ->
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(cb) ->
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client.rclient.exec (error, result) ->
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if client.driver == "ioredis"
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# ioredis returns an results like:
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# [ [null, 42], [null, "foo"] ]
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# where the first entries in each 2-tuple are
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# presumably errors for each individual command,
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# and the second entry is the result. We need to transform
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# this into the same result as the old redis driver:
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# [ 42, "foo" ]
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filtered_result = []
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for entry in result or []
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if entry[0]?
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return cb(entry[0])
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else
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filtered_result.push entry[1]
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result = filtered_result
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if client.primary
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# Return this result as the actual result
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callback(error, result)
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# Send the rest through for comparison
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cb(error, result)
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async.parallel jobs, (error, results) ->
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if error?
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logger.error {err: error}, "error in redis backend"
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else
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compareResults(results)
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COMMANDS = {
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"get": 0,
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"smembers": 0,
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"set": 0,
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"srem": 0,
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"sadd": 0,
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"del": 0,
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"lrange": 0,
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"llen": 0,
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"rpush": 0,
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"expire": 0,
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"ltrim": 0,
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"incr": 0,
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"eval": 2
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}
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for command, key_pos of COMMANDS
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do (command, key_pos) ->
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Client.prototype[command] = (args..., callback) ->
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jobs = @clients.map (client) ->
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(cb) ->
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key_builder = args[key_pos]
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key = key_builder(client.key_schema)
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args_with_key = args.slice(0)
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args_with_key[key_pos] = key
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client.rclient[command] args_with_key..., (error, result...) ->
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if client.primary
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# Return this result as the actual result
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callback(error, result...)
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# Send the rest through for comparison
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cb(error, result...)
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async.parallel jobs, (error, results) ->
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if error?
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logger.error {err: error}, "error in redis backend"
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else
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compareResults(results)
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MultiClient.prototype[command] = (args...) ->
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for client in @clients
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key_builder = args[key_pos]
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key = key_builder(client.key_schema)
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args_with_key = args.slice(0)
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args_with_key[key_pos] = key
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client.rclient[command] args_with_key...
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compareResults = (results) ->
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return if results.length < 2
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first = results[0]
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for result in results.slice(1)
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if not _.isEqual(first, result)
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logger.warn { results }, "redis return values do not match"
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module.exports =
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createClient: () ->
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client_configs = Settings.redis.documentupdater
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unless client_configs instanceof Array
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client_configs.primary = true
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client_configs = [client_configs]
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clients = client_configs.map (config) ->
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if config.cluster?
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Redis = require("ioredis")
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rclient = new Redis.Cluster(config.cluster)
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driver = "ioredis"
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else
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{host, port, password} = config
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rclient = require("redis-sharelatex").createClient({host, port, password})
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driver = "redis"
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return {
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rclient: rclient
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key_schema: config.key_schema
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primary: config.primary
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driver: driver
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}
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return new Client(clients) |