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mperham--sidekiq/lib/sidekiq/api.rb
Richard Machielse 167b871183 Fix #3620
2017-10-02 12:30:06 -07:00

898 lines
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# encoding: utf-8
# frozen_string_literal: true
require 'sidekiq'
module Sidekiq
class Stats
def initialize
fetch_stats!
end
def processed
stat :processed
end
def failed
stat :failed
end
def scheduled_size
stat :scheduled_size
end
def retry_size
stat :retry_size
end
def dead_size
stat :dead_size
end
def enqueued
stat :enqueued
end
def processes_size
stat :processes_size
end
def workers_size
stat :workers_size
end
def default_queue_latency
stat :default_queue_latency
end
def queues
Sidekiq::Stats::Queues.new.lengths
end
def fetch_stats!
pipe1_res = Sidekiq.redis do |conn|
conn.pipelined do
conn.get('stat:processed'.freeze)
conn.get('stat:failed'.freeze)
conn.zcard('schedule'.freeze)
conn.zcard('retry'.freeze)
conn.zcard('dead'.freeze)
conn.scard('processes'.freeze)
conn.lrange('queue:default'.freeze, -1, -1)
conn.smembers('processes'.freeze)
conn.smembers('queues'.freeze)
end
end
pipe2_res = Sidekiq.redis do |conn|
conn.pipelined do
pipe1_res[7].each {|key| conn.hget(key, 'busy'.freeze) }
pipe1_res[8].each {|queue| conn.llen("queue:#{queue}") }
end
end
s = pipe1_res[7].size
workers_size = pipe2_res[0...s].map(&:to_i).inject(0, &:+)
enqueued = pipe2_res[s..-1].map(&:to_i).inject(0, &:+)
default_queue_latency = if (entry = pipe1_res[6].first)
job = Sidekiq.load_json(entry) rescue {}
now = Time.now.to_f
thence = job['enqueued_at'.freeze] || now
now - thence
else
0
end
@stats = {
processed: pipe1_res[0].to_i,
failed: pipe1_res[1].to_i,
scheduled_size: pipe1_res[2],
retry_size: pipe1_res[3],
dead_size: pipe1_res[4],
processes_size: pipe1_res[5],
default_queue_latency: default_queue_latency,
workers_size: workers_size,
enqueued: enqueued
}
end
def reset(*stats)
all = %w(failed processed)
stats = stats.empty? ? all : all & stats.flatten.compact.map(&:to_s)
mset_args = []
stats.each do |stat|
mset_args << "stat:#{stat}"
mset_args << 0
end
Sidekiq.redis do |conn|
conn.mset(*mset_args)
end
end
private
def stat(s)
@stats[s]
end
class Queues
def lengths
Sidekiq.redis do |conn|
queues = conn.smembers('queues'.freeze)
lengths = conn.pipelined do
queues.each do |queue|
conn.llen("queue:#{queue}")
end
end
i = 0
array_of_arrays = queues.inject({}) do |memo, queue|
memo[queue] = lengths[i]
i += 1
memo
end.sort_by { |_, size| size }
Hash[array_of_arrays.reverse]
end
end
end
class History
def initialize(days_previous, start_date = nil)
@days_previous = days_previous
@start_date = start_date || Time.now.utc.to_date
end
def processed
@processed ||= date_stat_hash("processed")
end
def failed
@failed ||= date_stat_hash("failed")
end
private
def date_stat_hash(stat)
i = 0
stat_hash = {}
keys = []
dates = []
while i < @days_previous
date = @start_date - i
datestr = date.strftime("%Y-%m-%d".freeze)
keys << "stat:#{stat}:#{datestr}"
dates << datestr
i += 1
end
begin
Sidekiq.redis do |conn|
conn.mget(keys).each_with_index do |value, idx|
stat_hash[dates[idx]] = value ? value.to_i : 0
end
end
rescue Redis::CommandError
# mget will trigger a CROSSSLOT error when run against a Cluster
# TODO Someone want to add Cluster support?
end
stat_hash
end
end
end
##
# Encapsulates a queue within Sidekiq.
# Allows enumeration of all jobs within the queue
# and deletion of jobs.
#
# queue = Sidekiq::Queue.new("mailer")
# queue.each do |job|
# job.klass # => 'MyWorker'
# job.args # => [1, 2, 3]
# job.delete if job.jid == 'abcdef1234567890'
# end
#
class Queue
include Enumerable
##
# Return all known queues within Redis.
#
def self.all
Sidekiq.redis { |c| c.smembers('queues'.freeze) }.sort.map { |q| Sidekiq::Queue.new(q) }
end
attr_reader :name
def initialize(name="default")
@name = name
@rname = "queue:#{name}"
end
def size
Sidekiq.redis { |con| con.llen(@rname) }
end
# Sidekiq Pro overrides this
def paused?
false
end
##
# Calculates this queue's latency, the difference in seconds since the oldest
# job in the queue was enqueued.
#
# @return Float
def latency
entry = Sidekiq.redis do |conn|
conn.lrange(@rname, -1, -1)
end.first
return 0 unless entry
job = Sidekiq.load_json(entry)
now = Time.now.to_f
thence = job['enqueued_at'] || now
now - thence
end
def each
initial_size = size
deleted_size = 0
page = 0
page_size = 50
while true do
range_start = page * page_size - deleted_size
range_end = range_start + page_size - 1
entries = Sidekiq.redis do |conn|
conn.lrange @rname, range_start, range_end
end
break if entries.empty?
page += 1
entries.each do |entry|
yield Job.new(entry, @name)
end
deleted_size = initial_size - size
end
end
##
# Find the job with the given JID within this queue.
#
# This is a slow, inefficient operation. Do not use under
# normal conditions. Sidekiq Pro contains a faster version.
def find_job(jid)
detect { |j| j.jid == jid }
end
def clear
Sidekiq.redis do |conn|
conn.multi do
conn.del(@rname)
conn.srem("queues".freeze, name)
end
end
end
alias_method :💣, :clear
end
##
# Encapsulates a pending job within a Sidekiq queue or
# sorted set.
#
# The job should be considered immutable but may be
# removed from the queue via Job#delete.
#
class Job
attr_reader :item
attr_reader :value
def initialize(item, queue_name=nil)
@args = nil
@value = item
@item = item.is_a?(Hash) ? item : parse(item)
@queue = queue_name || @item['queue']
end
def parse(item)
Sidekiq.load_json(item)
rescue JSON::ParserError
# If the job payload in Redis is invalid JSON, we'll load
# the item as an empty hash and store the invalid JSON as
# the job 'args' for display in the Web UI.
@invalid = true
@args = [item]
{}
end
def klass
self['class']
end
def display_class
# Unwrap known wrappers so they show up in a human-friendly manner in the Web UI
@klass ||= case klass
when /\ASidekiq::Extensions::Delayed/
safe_load(args[0], klass) do |target, method, _|
"#{target}.#{method}"
end
when "ActiveJob::QueueAdapters::SidekiqAdapter::JobWrapper"
job_class = @item['wrapped'] || args[0]
if 'ActionMailer::DeliveryJob' == job_class
# MailerClass#mailer_method
args[0]['arguments'][0..1].join('#')
else
job_class
end
else
klass
end
end
def display_args
# Unwrap known wrappers so they show up in a human-friendly manner in the Web UI
@display_args ||= case klass
when /\ASidekiq::Extensions::Delayed/
safe_load(args[0], args) do |_, _, arg|
arg
end
when "ActiveJob::QueueAdapters::SidekiqAdapter::JobWrapper"
job_args = self['wrapped'] ? args[0]["arguments"] : []
if 'ActionMailer::DeliveryJob' == (self['wrapped'] || args[0])
# remove MailerClass, mailer_method and 'deliver_now'
job_args.drop(3)
else
job_args
end
else
if self['encrypt'.freeze]
# no point in showing 150+ bytes of random garbage
args[-1] = '[encrypted data]'.freeze
end
args
end
end
def args
@args || @item['args']
end
def jid
self['jid']
end
def enqueued_at
self['enqueued_at'] ? Time.at(self['enqueued_at']).utc : nil
end
def created_at
Time.at(self['created_at'] || self['enqueued_at'] || 0).utc
end
def queue
@queue
end
def latency
now = Time.now.to_f
now - (@item['enqueued_at'] || @item['created_at'] || now)
end
##
# Remove this job from the queue.
def delete
count = Sidekiq.redis do |conn|
conn.lrem("queue:#{@queue}", 1, @value)
end
count != 0
end
def [](name)
# nil will happen if the JSON fails to parse.
# We don't guarantee Sidekiq will work with bad job JSON but we should
# make a best effort to minimize the damage.
@item ? @item[name] : nil
end
private
def safe_load(content, default)
begin
yield(*YAML.load(content))
rescue => ex
# #1761 in dev mode, it's possible to have jobs enqueued which haven't been loaded into
# memory yet so the YAML can't be loaded.
Sidekiq.logger.warn "Unable to load YAML: #{ex.message}" unless Sidekiq.options[:environment] == 'development'
default
end
end
end
class SortedEntry < Job
attr_reader :score
attr_reader :parent
def initialize(parent, score, item)
super(item)
@score = score
@parent = parent
end
def at
Time.at(score).utc
end
def delete
if @value
@parent.delete_by_value(@parent.name, @value)
else
@parent.delete_by_jid(score, jid)
end
end
def reschedule(at)
delete
@parent.schedule(at, item)
end
def add_to_queue
remove_job do |message|
msg = Sidekiq.load_json(message)
Sidekiq::Client.push(msg)
end
end
def retry
remove_job do |message|
msg = Sidekiq.load_json(message)
msg['retry_count'] -= 1 if msg['retry_count']
Sidekiq::Client.push(msg)
end
end
##
# Place job in the dead set
def kill
remove_job do |message|
DeadSet.new.kill(message)
end
end
def error?
!!item['error_class']
end
private
def remove_job
Sidekiq.redis do |conn|
results = conn.multi do
conn.zrangebyscore(parent.name, score, score)
conn.zremrangebyscore(parent.name, score, score)
end.first
if results.size == 1
yield results.first
else
# multiple jobs with the same score
# find the one with the right JID and push it
hash = results.group_by do |message|
if message.index(jid)
msg = Sidekiq.load_json(message)
msg['jid'] == jid
else
false
end
end
msg = hash.fetch(true, []).first
yield msg if msg
# push the rest back onto the sorted set
conn.multi do
hash.fetch(false, []).each do |message|
conn.zadd(parent.name, score.to_f.to_s, message)
end
end
end
end
end
end
class SortedSet
include Enumerable
attr_reader :name
def initialize(name)
@name = name
@_size = size
end
def size
Sidekiq.redis { |c| c.zcard(name) }
end
def clear
Sidekiq.redis do |conn|
conn.del(name)
end
end
alias_method :💣, :clear
end
class JobSet < SortedSet
def schedule(timestamp, message)
Sidekiq.redis do |conn|
conn.zadd(name, timestamp.to_f.to_s, Sidekiq.dump_json(message))
end
end
def each
initial_size = @_size
offset_size = 0
page = -1
page_size = 50
while true do
range_start = page * page_size + offset_size
range_end = range_start + page_size - 1
elements = Sidekiq.redis do |conn|
conn.zrange name, range_start, range_end, with_scores: true
end
break if elements.empty?
page -= 1
elements.each do |element, score|
yield SortedEntry.new(self, score, element)
end
offset_size = initial_size - @_size
end
end
def fetch(score, jid = nil)
elements = Sidekiq.redis do |conn|
conn.zrangebyscore(name, score, score)
end
elements.inject([]) do |result, element|
entry = SortedEntry.new(self, score, element)
if jid
result << entry if entry.jid == jid
else
result << entry
end
result
end
end
##
# Find the job with the given JID within this sorted set.
#
# This is a slow, inefficient operation. Do not use under
# normal conditions. Sidekiq Pro contains a faster version.
def find_job(jid)
self.detect { |j| j.jid == jid }
end
def delete_by_value(name, value)
Sidekiq.redis do |conn|
ret = conn.zrem(name, value)
@_size -= 1 if ret
ret
end
end
def delete_by_jid(score, jid)
Sidekiq.redis do |conn|
elements = conn.zrangebyscore(name, score, score)
elements.each do |element|
message = Sidekiq.load_json(element)
if message["jid"] == jid
ret = conn.zrem(name, element)
@_size -= 1 if ret
break ret
end
false
end
end
end
alias_method :delete, :delete_by_jid
end
##
# Allows enumeration of scheduled jobs within Sidekiq.
# Based on this, you can search/filter for jobs. Here's an
# example where I'm selecting all jobs of a certain type
# and deleting them from the schedule queue.
#
# r = Sidekiq::ScheduledSet.new
# r.select do |scheduled|
# scheduled.klass == 'Sidekiq::Extensions::DelayedClass' &&
# scheduled.args[0] == 'User' &&
# scheduled.args[1] == 'setup_new_subscriber'
# end.map(&:delete)
class ScheduledSet < JobSet
def initialize
super 'schedule'
end
end
##
# Allows enumeration of retries within Sidekiq.
# Based on this, you can search/filter for jobs. Here's an
# example where I'm selecting all jobs of a certain type
# and deleting them from the retry queue.
#
# r = Sidekiq::RetrySet.new
# r.select do |retri|
# retri.klass == 'Sidekiq::Extensions::DelayedClass' &&
# retri.args[0] == 'User' &&
# retri.args[1] == 'setup_new_subscriber'
# end.map(&:delete)
class RetrySet < JobSet
def initialize
super 'retry'
end
def retry_all
while size > 0
each(&:retry)
end
end
end
##
# Allows enumeration of dead jobs within Sidekiq.
#
class DeadSet < JobSet
def initialize
super 'dead'
end
def kill(message)
now = Time.now.to_f
Sidekiq.redis do |conn|
conn.multi do
conn.zadd(name, now.to_s, message)
conn.zremrangebyscore(name, '-inf', now - self.class.timeout)
conn.zremrangebyrank(name, 0, - self.class.max_jobs)
end
end
end
def retry_all
while size > 0
each(&:retry)
end
end
def self.max_jobs
Sidekiq.options[:dead_max_jobs]
end
def self.timeout
Sidekiq.options[:dead_timeout_in_seconds]
end
end
##
# Enumerates the set of Sidekiq processes which are actively working
# right now. Each process send a heartbeat to Redis every 5 seconds
# so this set should be relatively accurate, barring network partitions.
#
# Yields a Sidekiq::Process.
#
class ProcessSet
include Enumerable
def initialize(clean_plz=true)
self.class.cleanup if clean_plz
end
# Cleans up dead processes recorded in Redis.
# Returns the number of processes cleaned.
def self.cleanup
count = 0
Sidekiq.redis do |conn|
procs = conn.smembers('processes').sort
heartbeats = conn.pipelined do
procs.each do |key|
conn.hget(key, 'info')
end
end
# the hash named key has an expiry of 60 seconds.
# if it's not found, that means the process has not reported
# in to Redis and probably died.
to_prune = []
heartbeats.each_with_index do |beat, i|
to_prune << procs[i] if beat.nil?
end
count = conn.srem('processes', to_prune) unless to_prune.empty?
end
count
end
def each
procs = Sidekiq.redis { |conn| conn.smembers('processes') }.sort
Sidekiq.redis do |conn|
# We're making a tradeoff here between consuming more memory instead of
# making more roundtrips to Redis, but if you have hundreds or thousands of workers,
# you'll be happier this way
result = conn.pipelined do
procs.each do |key|
conn.hmget(key, 'info', 'busy', 'beat', 'quiet')
end
end
result.each do |info, busy, at_s, quiet|
# If a process is stopped between when we query Redis for `procs` and
# when we query for `result`, we will have an item in `result` that is
# composed of `nil` values.
next if info.nil?
hash = Sidekiq.load_json(info)
yield Process.new(hash.merge('busy' => busy.to_i, 'beat' => at_s.to_f, 'quiet' => quiet))
end
end
nil
end
# This method is not guaranteed accurate since it does not prune the set
# based on current heartbeat. #each does that and ensures the set only
# contains Sidekiq processes which have sent a heartbeat within the last
# 60 seconds.
def size
Sidekiq.redis { |conn| conn.scard('processes') }
end
# Returns the identity of the current cluster leader or "" if no leader.
# This is a Sidekiq Enterprise feature, will always return "" in Sidekiq
# or Sidekiq Pro.
def leader
@leader ||= begin
x = Sidekiq.redis {|c| c.get("dear-leader") }
# need a non-falsy value so we can memoize
x = "" unless x
x
end
end
end
#
# Sidekiq::Process represents an active Sidekiq process talking with Redis.
# Each process has a set of attributes which look like this:
#
# {
# 'hostname' => 'app-1.example.com',
# 'started_at' => <process start time>,
# 'pid' => 12345,
# 'tag' => 'myapp'
# 'concurrency' => 25,
# 'queues' => ['default', 'low'],
# 'busy' => 10,
# 'beat' => <last heartbeat>,
# 'identity' => <unique string identifying the process>,
# }
class Process
def initialize(hash)
@attribs = hash
end
def tag
self['tag']
end
def labels
Array(self['labels'])
end
def [](key)
@attribs[key]
end
def identity
self['identity']
end
def quiet!
signal('TSTP')
end
def stop!
signal('TERM')
end
def dump_threads
signal('TTIN')
end
def stopping?
self['quiet'] == 'true'
end
private
def signal(sig)
key = "#{identity}-signals"
Sidekiq.redis do |c|
c.multi do
c.lpush(key, sig)
c.expire(key, 60)
end
end
end
end
##
# A worker is a thread that is currently processing a job.
# Programmatic access to the current active worker set.
#
# WARNING WARNING WARNING
#
# This is live data that can change every millisecond.
# If you call #size => 5 and then expect #each to be
# called 5 times, you're going to have a bad time.
#
# workers = Sidekiq::Workers.new
# workers.size => 2
# workers.each do |process_id, thread_id, work|
# # process_id is a unique identifier per Sidekiq process
# # thread_id is a unique identifier per thread
# # work is a Hash which looks like:
# # { 'queue' => name, 'run_at' => timestamp, 'payload' => msg }
# # run_at is an epoch Integer.
# end
#
class Workers
include Enumerable
def each
Sidekiq.redis do |conn|
procs = conn.smembers('processes')
procs.sort.each do |key|
valid, workers = conn.pipelined do
conn.exists(key)
conn.hgetall("#{key}:workers")
end
next unless valid
workers.each_pair do |tid, json|
yield key, tid, Sidekiq.load_json(json)
end
end
end
end
# Note that #size is only as accurate as Sidekiq's heartbeat,
# which happens every 5 seconds. It is NOT real-time.
#
# Not very efficient if you have lots of Sidekiq
# processes but the alternative is a global counter
# which can easily get out of sync with crashy processes.
def size
Sidekiq.redis do |conn|
procs = conn.smembers('processes')
if procs.empty?
0
else
conn.pipelined do
procs.each do |key|
conn.hget(key, 'busy')
end
end.map(&:to_i).inject(:+)
end
end
end
end
end
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