services/api/app/models/job.rb

   1 class Job < ArvadosModel
   2   include AssignUuid
   3   include KindAndEtag
   4   include CommonApiTemplate
   5   serialize :script_parameters, Hash
   6   serialize :runtime_constraints, Hash
   7   serialize :tasks_summary, Hash
   8   before_create :ensure_unique_submit_id
   9   before_create :ensure_script_version_is_commit
  10   before_update :ensure_script_version_is_commit
  11   after_commit :trigger_crunch_dispatch_if_cancelled, :on => :update
  12
  13   has_many :commit_ancestors, :foreign_key => :descendant, :primary_key => :script_version
  14
  15   class SubmitIdReused < StandardError
  16   end
  17
  18   api_accessible :user, extend: :common do |t|
  19     t.add :submit_id
  20     t.add :priority
  21     t.add :script
  22     t.add :script_parameters
  23     t.add :script_version
  24     t.add :cancelled_at
  25     t.add :cancelled_by_client_uuid
  26     t.add :cancelled_by_user_uuid
  27     t.add :started_at
  28     t.add :finished_at
  29     t.add :output
  30     t.add :success
  31     t.add :running
  32     t.add :is_locked_by_uuid
  33     t.add :log
  34     t.add :runtime_constraints
  35     t.add :tasks_summary
  36     t.add :dependencies
  37     t.add :log_stream_href
  38     t.add :log_buffer
  39   end
  40
  41   def assert_finished
  42     update_attributes(finished_at: finished_at || Time.now,
  43                       success: success.nil? ? false : success,
  44                       running: false)
  45   end
  46
  47   def log_stream_href
  48     unless self.finished_at
  49       "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}/log_tail_follow"
  50     end
  51   end
  52
  53   def self.queue
  54     self.where('started_at is ? and is_locked_by_uuid is ? and cancelled_at is ? and success is ?',
  55                nil, nil, nil, nil).
  56       order('priority desc, created_at')
  57   end
  58
  59   protected
  60
  61   def foreign_key_attributes
  62     super + %w(output log)
  63   end
  64
  65   def ensure_script_version_is_commit
  66     if self.is_locked_by_uuid and self.started_at
  67       # Apparently client has already decided to go for it. This is
  68       # needed to run a local job using a local working directory
  69       # instead of a commit-ish.
  70       return true
  71     end
  72     if new_record? or script_version_changed?
  73       sha1 = Commit.find_by_commit_ish(self.script_version) rescue nil
  74       if sha1
  75         self.script_version = sha1
  76       else
  77         raise ArgumentError.new("Specified script_version does not resolve to a commit")
  78       end
  79     end
  80   end
  81
  82   def ensure_unique_submit_id
  83     if !submit_id.nil?
  84       if Job.where('submit_id=?',self.submit_id).first
  85         raise SubmitIdReused.new
  86       end
  87     end
  88     true
  89   end
  90
  91   def dependencies
  92     deps = {}
  93     queue = self.script_parameters.values
  94     while not queue.empty?
  95       queue = queue.flatten.compact.collect do |v|
  96         if v.is_a? Hash
  97           v.values
  98         elsif v.is_a? String
  99           v.match(/^(([0-9a-f]{32})\b(\+[^,]+)?,?)*$/) do |locator|
 100             deps[locator.to_s] = true
 101           end
 102           nil
 103         end
 104       end
 105     end
 106     deps.keys
 107   end
 108
 109   def permission_to_update
 110     if is_locked_by_uuid_was and !(current_user and
 111                                    (current_user.uuid == is_locked_by_uuid_was or
 112                                     current_user.uuid == system_user.uuid))
 113       if script_changed? or
 114           script_parameters_changed? or
 115           script_version_changed? or
 116           (!cancelled_at_was.nil? and
 117            (cancelled_by_client_uuid_changed? or
 118             cancelled_by_user_uuid_changed? or
 119             cancelled_at_changed?)) or
 120           started_at_changed? or
 121           finished_at_changed? or
 122           running_changed? or
 123           success_changed? or
 124           output_changed? or
 125           log_changed? or
 126           tasks_summary_changed?
 127         logger.warn "User #{current_user.uuid if current_user} tried to change protected job attributes on locked #{self.class.to_s} #{uuid_was}"
 128         return false
 129       end
 130     end
 131     if !is_locked_by_uuid_changed?
 132       super
 133     else
 134       if !current_user
 135         logger.warn "Anonymous user tried to change lock on #{self.class.to_s} #{uuid_was}"
 136         false
 137       elsif is_locked_by_uuid_was and is_locked_by_uuid_was != current_user.uuid
 138         logger.warn "User #{current_user.uuid} tried to steal lock on #{self.class.to_s} #{uuid_was} from #{is_locked_by_uuid_was}"
 139         false
 140       elsif !is_locked_by_uuid.nil? and is_locked_by_uuid != current_user.uuid
 141         logger.warn "User #{current_user.uuid} tried to lock #{self.class.to_s} #{uuid_was} with uuid #{is_locked_by_uuid}"
 142         false
 143       else
 144         super
 145       end
 146     end
 147   end
 148
 149   def update_modified_by_fields
 150     if self.cancelled_at_changed?
 151       # Ensure cancelled_at cannot be set to arbitrary non-now times,
 152       # or changed once it is set.
 153       if self.cancelled_at and not self.cancelled_at_was
 154         self.cancelled_at = Time.now
 155         self.cancelled_by_user_uuid = current_user.uuid
 156         self.cancelled_by_client_uuid = current_api_client.uuid
 157         @need_crunch_dispatch_trigger = true
 158       else
 159         self.cancelled_at = self.cancelled_at_was
 160         self.cancelled_by_user_uuid = self.cancelled_by_user_uuid_was
 161         self.cancelled_by_client_uuid = self.cancelled_by_client_uuid_was
 162       end
 163     end
 164     super
 165   end
 166
 167   def trigger_crunch_dispatch_if_cancelled
 168     if @need_crunch_dispatch_trigger
 169       File.open(Rails.configuration.crunch_refresh_trigger, 'wb') do
 170         # That's all, just create/touch a file for crunch-job to see.
 171       end
 172     end
 173   end
 174
 175   def log_buffer
 176     begin
 177       @@redis ||= Redis.new(:timeout => 0)
 178       if @@redis.exists uuid
 179         @@redis.getrange(uuid, 0 - 2**10, -1)
 180       end
 181     rescue Redis::CannotConnectError
 182       return '(not available)'
 183     end
 184   end
 185 end