62 lines
1.6 KiB
Ruby
62 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module OptimisticLocking
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MAX_RETRIES = 100
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module_function
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def retry_lock(subject, max_retries = MAX_RETRIES, name:, &block)
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start_time = Gitlab::Metrics::System.monotonic_time
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retry_attempts = 0
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begin
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ActiveRecord::Base.transaction do # rubocop: disable Database/MultipleDatabases
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yield(subject)
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end
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rescue ActiveRecord::StaleObjectError
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raise unless retry_attempts < max_retries
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subject.reset
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retry_attempts += 1
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retry
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ensure
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retry_lock_histogram.observe({}, retry_attempts)
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log_optimistic_lock_retries(
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name: name,
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retry_attempts: retry_attempts,
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start_time: start_time)
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end
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end
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alias_method :retry_optimistic_lock, :retry_lock
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def log_optimistic_lock_retries(name:, retry_attempts:, start_time:)
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return unless retry_attempts > 0
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elapsed_time = Gitlab::Metrics::System.monotonic_time - start_time
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retry_lock_logger.info(
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message: "Optimistic Lock released with retries",
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name: name,
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retries: retry_attempts,
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time_s: elapsed_time)
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end
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def retry_lock_logger
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@retry_lock_logger ||= Gitlab::Services::Logger.build
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end
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def retry_lock_histogram
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@retry_lock_histogram ||=
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Gitlab::Metrics.histogram(
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:gitlab_optimistic_locking_retries,
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'Number of retry attempts to execute optimistic retry lock',
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{},
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[0, 1, 2, 3, 5, 10, 50]
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)
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end
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end
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end
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