- def self.find_reusable attrs, params, filters, read_users
- if filters.empty? # Translate older creation parameters into filters.
- filters =
- [["repository", "=", attrs[:repository]],
- ["script", "=", attrs[:script]],
- ["script_version", "not in git", params[:exclude_script_versions]],
- ].reject { |filter| filter.last.nil? or filter.last.empty? }
- if !params[:minimum_script_version].blank?
- filters << ["script_version", "in git",
- params[:minimum_script_version]]
- else
- filters += default_git_filters("script_version", attrs[:repository],
- attrs[:script_version])
- end
- if image_search = attrs[:runtime_constraints].andand["docker_image"]
- if image_tag = attrs[:runtime_constraints]["docker_image_tag"]
- image_search += ":#{image_tag}"
- end
- image_locator = Collection.
- for_latest_docker_image(image_search).andand.portable_data_hash
- else
- image_locator = nil
- end
- filters << ["docker_image_locator", "=", image_locator]
- if sdk_version = attrs[:runtime_constraints].andand["arvados_sdk_version"]
- filters += default_git_filters("arvados_sdk_version", "arvados", sdk_version)
- end
- filters = load_job_specific_filters(attrs, filters, read_users)
- end
-
- # Check specified filters for some reasonableness.
- filter_names = filters.map { |f| f.first }.uniq
- ["repository", "script"].each do |req_filter|
- if not filter_names.include?(req_filter)
- return send_error("#{req_filter} filter required")
- end
- end
-
- # Search for a reusable Job, and return it if found.
- candidates = Job.
- readable_by(current_user).
- where('state = ? or (owner_uuid = ? and state in (?))',
- Job::Complete, current_user.uuid, [Job::Queued, Job::Running]).
- where('script_parameters_digest = ?', Job.sorted_hash_digest(attrs[:script_parameters])).
- where('nondeterministic is distinct from ?', true).
- order('state desc, created_at') # prefer Running jobs over Queued
- candidates = apply_filters candidates, filters
- chosen = nil
- incomplete_job = nil
- candidates.each do |j|
- if j.state != Job::Complete
- # We'll use this if we don't find a job that has completed
- incomplete_job ||= j
- next
- end
-
- if chosen == false
- # We have already decided not to reuse any completed job
- next
- elsif chosen
- if chosen.output != j.output
- # If two matching jobs produced different outputs, run a new
- # job (or use one that's already running/queued) instead of
- # choosing one arbitrarily.
- chosen = false
- end
- # ...and that's the only thing we need to do once we've chosen
- # a job to reuse.
- elsif !Collection.readable_by(current_user).find_by_portable_data_hash(j.output)
- # As soon as the output we will end up returning (if any) is
- # decided, check whether it will be visible to the user; if
- # not, any further investigation of reusable jobs is futile.
- chosen = false
- else
- chosen = j
- end
- end
- chosen || incomplete_job
- end
-