mirror of
https://github.com/overleaf/overleaf.git
synced 2024-10-31 21:21:03 -04:00
125 lines
No EOL
3.3 KiB
CoffeeScript
125 lines
No EOL
3.3 KiB
CoffeeScript
Settings = require "settings-sharelatex"
|
|
async = require "async"
|
|
_ = require "underscore"
|
|
logger = require "logger-sharelatex"
|
|
|
|
class Client
|
|
constructor: (@clients) ->
|
|
|
|
multi: () ->
|
|
return new MultiClient(
|
|
@clients.map (client) -> {
|
|
rclient: client.rclient.multi()
|
|
key_schema: client.key_schema
|
|
primary: client.primary
|
|
driver: client.driver
|
|
}
|
|
)
|
|
|
|
class MultiClient
|
|
constructor: (@clients) ->
|
|
|
|
exec: (callback) ->
|
|
jobs = @clients.map (client) ->
|
|
(cb) ->
|
|
client.rclient.exec (error, result) ->
|
|
if client.driver == "ioredis"
|
|
# ioredis returns an results like:
|
|
# [ [null, 42], [null, "foo"] ]
|
|
# where the first entries in each 2-tuple are
|
|
# presumably errors for each individual command,
|
|
# and the second entry is the result. We need to transform
|
|
# this into the same result as the old redis driver:
|
|
# [ 42, "foo" ]
|
|
filtered_result = []
|
|
for entry in result or []
|
|
if entry[0]?
|
|
return cb(entry[0])
|
|
else
|
|
filtered_result.push entry[1]
|
|
result = filtered_result
|
|
|
|
if client.primary
|
|
# Return this result as the actual result
|
|
callback(error, result)
|
|
# Send the rest through for comparison
|
|
cb(error, result)
|
|
async.parallel jobs, (error, results) ->
|
|
if error?
|
|
logger.error {err: error}, "error in redis backend"
|
|
else
|
|
compareResults(results)
|
|
|
|
COMMANDS = {
|
|
"get": 0,
|
|
"smembers": 0,
|
|
"set": 0,
|
|
"srem": 0,
|
|
"sadd": 0,
|
|
"del": 0,
|
|
"lrange": 0,
|
|
"llen": 0,
|
|
"rpush": 0,
|
|
"expire": 0,
|
|
"ltrim": 0,
|
|
"incr": 0,
|
|
"eval": 2
|
|
}
|
|
for command, key_pos of COMMANDS
|
|
do (command, key_pos) ->
|
|
Client.prototype[command] = (args..., callback) ->
|
|
jobs = @clients.map (client) ->
|
|
(cb) ->
|
|
key_builder = args[key_pos]
|
|
key = key_builder(client.key_schema)
|
|
args_with_key = args.slice(0)
|
|
args_with_key[key_pos] = key
|
|
client.rclient[command] args_with_key..., (error, result...) ->
|
|
if client.primary
|
|
# Return this result as the actual result
|
|
callback(error, result...)
|
|
# Send the rest through for comparison
|
|
cb(error, result...)
|
|
async.parallel jobs, (error, results) ->
|
|
if error?
|
|
logger.error {err: error}, "error in redis backend"
|
|
else
|
|
compareResults(results)
|
|
|
|
MultiClient.prototype[command] = (args...) ->
|
|
for client in @clients
|
|
key_builder = args[key_pos]
|
|
key = key_builder(client.key_schema)
|
|
args_with_key = args.slice(0)
|
|
args_with_key[key_pos] = key
|
|
client.rclient[command] key, args...
|
|
|
|
compareResults = (results) ->
|
|
return if results.length < 2
|
|
first = results[0]
|
|
for result in results.slice(1)
|
|
if not _.isEqual(first, result)
|
|
logger.warn { results }, "redis return values do not match"
|
|
|
|
module.exports =
|
|
createClient: () ->
|
|
client_configs = Settings.redis.documentupdater
|
|
unless client_configs instanceof Array
|
|
client_configs.primary = true
|
|
client_configs = [client_configs]
|
|
clients = client_configs.map (config) ->
|
|
if config.cluster?
|
|
Redis = require("ioredis")
|
|
rclient = new Redis.Cluster(config.cluster)
|
|
driver = "ioredis"
|
|
else
|
|
{host, port, password} = config
|
|
rclient = require("redis-sharelatex").createClient({host, port, password})
|
|
driver = "redis"
|
|
return {
|
|
rclient: rclient
|
|
key_schema: config.key_schema
|
|
primary: config.primary
|
|
driver: driver
|
|
}
|
|
return new Client(clients) |