70 lines
2.1 KiB
Ruby
70 lines
2.1 KiB
Ruby
# frozen_string_literal: true
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module Ci
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class ResourceGroup < Ci::ApplicationRecord
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belongs_to :project, inverse_of: :resource_groups
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has_many :resources, class_name: 'Ci::Resource', inverse_of: :resource_group
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has_many :processables, class_name: 'Ci::Processable', inverse_of: :resource_group
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validates :key,
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length: { maximum: 255 },
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format: { with: Gitlab::Regex.environment_name_regex,
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message: Gitlab::Regex.environment_name_regex_message }
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before_create :ensure_resource
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enum process_mode: {
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unordered: 0,
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oldest_first: 1,
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newest_first: 2
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}
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##
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# NOTE: This is concurrency-safe method that the subquery in the `UPDATE`
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# works as explicit locking.
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def assign_resource_to(processable)
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resources.free.limit(1).update_all(build_id: processable.id) > 0
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end
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def release_resource_from(processable)
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resources.retained_by(processable).update_all(build_id: nil) > 0
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end
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def upcoming_processables
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if unordered?
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processables.waiting_for_resource
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elsif oldest_first?
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processables.waiting_for_resource_or_upcoming
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.order(Arel.sql("commit_id ASC, #{sort_by_job_status}"))
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elsif newest_first?
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processables.waiting_for_resource_or_upcoming
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.order(Arel.sql("commit_id DESC, #{sort_by_job_status}"))
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else
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Ci::Processable.none
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end
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end
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private
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# In order to avoid deadlock, we do NOT specify the job execution order in the same pipeline.
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# The system processes wherever ready to transition to `pending` status from `waiting_for_resource`.
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# See https://gitlab.com/gitlab-org/gitlab/-/issues/202186 for more information.
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def sort_by_job_status
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<<~SQL
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CASE status
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WHEN 'waiting_for_resource' THEN 0
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ELSE 1
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END ASC
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SQL
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end
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def ensure_resource
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# Currently we only support one resource per group, which means
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# maximum one build can be set to the resource group, thus builds
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# belong to the same resource group are executed once at time.
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self.resources.build if self.resources.empty?
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end
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end
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end
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