8018: Add container_count field.

[arvados.git] / services / api / app / models / container.rb

diff --git a/services/api/app/models/container.rb b/services/api/app/models/container.rb
index 4c770083786934abdafe9461f51ee03646396415..c1c3eae94b7769f35c90e874b0805e537847da71 100644 (file)
--- a/services/api/app/models/container.rb
+++ b/services/api/app/models/container.rb
@@ -18,6 +18,7 @@ class Container < ArvadosModel
   validate :validate_change
   validate :validate_lock
   after_validation :assign_auth
+  before_save :sort_serialized_attrs
   after_save :handle_completed
 
   has_many :container_requests, :foreign_key => :container_uuid, :class_name => 'ContainerRequest', :primary_key => :uuid
@@ -76,6 +77,70 @@ class Container < ArvadosModel
     end
   end
 
+  def self.find_reusable(attrs)
+    candidates = Container.
+      where('command = ?', attrs[:command].to_yaml).
+      where('cwd = ?', attrs[:cwd]).
+      where('environment = ?', self.deep_sort_hash(attrs[:environment]).to_yaml).
+      where('output_path = ?', attrs[:output_path]).
+      where('container_image = ?', attrs[:container_image]).
+      where('mounts = ?', self.deep_sort_hash(attrs[:mounts]).to_yaml).
+      where('runtime_constraints = ?', self.deep_sort_hash(attrs[:runtime_constraints]).to_yaml)
+
+    # Check for Completed candidates that only had consistent outputs.
+    completed = candidates.where(state: Complete).where(exit_code: 0)
+    if completed.select("output").group('output').limit(2).length == 1
+      return completed.order('finished_at asc').limit(1).first
+    end
+
+    # Check for Running candidates and return the most likely to finish sooner.
+    running = candidates.where(state: Running).
+      order('progress desc, started_at asc').limit(1).first
+    return running if not running.nil?
+
+    # Check for Locked or Queued ones and return the most likely to start first.
+    locked_or_queued = candidates.where("state IN (?)", [Locked, Queued]).
+      order('state asc, priority desc, created_at asc').limit(1).first
+    return locked_or_queued if not locked_or_queued.nil?
+
+    # No suitable candidate found.
+    nil
+  end
+
+  def lock
+    with_lock do
+      if self.state == Locked
+        raise AlreadyLockedError
+      end
+      self.state = Locked
+      self.save!
+    end
+  end
+
+  def unlock
+    with_lock do
+      if self.state == Queued
+        raise InvalidStateTransitionError
+      end
+      self.state = Queued
+      self.save!
+    end
+  end
+
+  def self.readable_by(*users_list)
+    if users_list.select { |u| u.is_admin }.any?
+      return self
+    end
+    user_uuids = users_list.map { |u| u.uuid }
+    uuid_list = user_uuids + users_list.flat_map { |u| u.groups_i_can(:read) }
+    uuid_list.uniq!
+    permitted = "(SELECT head_uuid FROM links WHERE link_class='permission' AND tail_uuid IN (:uuids))"
+    joins(:container_requests).
+      where("container_requests.uuid IN #{permitted} OR "+
+            "container_requests.owner_uuid IN (:uuids)",
+            uuids: uuid_list)
+  end
+
   protected
 
   def fill_field_defaults
@@ -200,6 +265,18 @@ class Container < ArvadosModel
               api_client_id: 0)
   end
 
+  def sort_serialized_attrs
+    if self.environment_changed?
+      self.environment = self.class.deep_sort_hash(self.environment)
+    end
+    if self.mounts_changed?
+      self.mounts = self.class.deep_sort_hash(self.mounts)
+    end
+    if self.runtime_constraints_changed?
+      self.runtime_constraints = self.class.deep_sort_hash(self.runtime_constraints)
+    end
+  end
+
   def handle_completed
     # This container is finished so finalize any associated container requests
     # that are associated with this container.