86 lines
2.5 KiB
Ruby
86 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module SidekiqConfig
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class WorkerMatcher
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WILDCARD_MATCH = '*'
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QUERY_OR_OPERATOR = '|'
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QUERY_AND_OPERATOR = '&'
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QUERY_CONCATENATE_OPERATOR = ','
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QUERY_TERM_REGEX = %r{^(\w+)(!?=)([\w:#{QUERY_CONCATENATE_OPERATOR}]+)}.freeze
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QUERY_PREDICATES = {
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feature_category: :to_sym,
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has_external_dependencies: lambda { |value| value == 'true' },
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name: :to_s,
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resource_boundary: :to_sym,
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tags: :to_sym,
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urgency: :to_sym
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}.freeze
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QueryError = Class.new(StandardError)
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InvalidTerm = Class.new(QueryError)
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UnknownOperator = Class.new(QueryError)
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UnknownPredicate = Class.new(QueryError)
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def initialize(query_string)
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@match_lambda = query_string_to_lambda(query_string)
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end
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def match?(worker_metadata)
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@match_lambda.call(worker_metadata)
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end
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private
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def query_string_to_lambda(query_string)
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return lambda { |_worker| true } if query_string.strip == WILDCARD_MATCH
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or_clauses = query_string.split(QUERY_OR_OPERATOR).map do |and_clauses_string|
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and_clauses_predicates = and_clauses_string.split(QUERY_AND_OPERATOR).map do |term|
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predicate_for_term(term)
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end
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lambda { |worker| and_clauses_predicates.all? { |predicate| predicate.call(worker) } }
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end
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lambda { |worker| or_clauses.any? { |predicate| predicate.call(worker) } }
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end
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def predicate_for_term(term)
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match = term.match(QUERY_TERM_REGEX)
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raise InvalidTerm.new("Invalid term: #{term}") unless match
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_, lhs, op, rhs = *match
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predicate_for_op(op, predicate_factory(lhs, rhs.split(QUERY_CONCATENATE_OPERATOR)))
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end
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def predicate_for_op(op, predicate)
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case op
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when '='
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predicate
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when '!='
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lambda { |worker| !predicate.call(worker) }
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else
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# This is unreachable because InvalidTerm will be raised instead, but
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# keeping it allows to guard against that changing in future.
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raise UnknownOperator.new("Unknown operator: #{op}")
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end
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end
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def predicate_factory(lhs, values)
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values_block = QUERY_PREDICATES[lhs.to_sym]
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raise UnknownPredicate.new("Unknown predicate: #{lhs}") unless values_block
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lambda do |queue|
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comparator = Array(queue[lhs.to_sym]).to_set
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values.map(&values_block).to_set.intersect?(comparator)
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end
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end
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end
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end
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end
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