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082f59842d
followup on #015051ec without this improvement monkey patch does not work. bind should yield the block it is passed for it to work.
58 lines
1.9 KiB
Ruby
58 lines
1.9 KiB
Ruby
# frozen_string_literal: true
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# see: https://github.com/rails/rails/pull/36949#issuecomment-530698779
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#
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# Without this patch each time we close a DB connection we spin a thread
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module ::ActiveRecord
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module ConnectionAdapters
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class AbstractAdapter
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class StaticThreadLocalVar
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attr_reader :value
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def initialize(value)
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@value = value
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end
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def bind(value)
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raise "attempting to change immutable local var" if value != @value
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if block_given?
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yield
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end
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end
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end
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# we have no choice but to perform an aggressive patch here
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# if we simply hook the method we will still call a finalizer
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# on Concurrent::ThreadLocalVar
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def initialize(connection, logger = nil, config = {}) # :nodoc:
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super()
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@connection = connection
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@owner = nil
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@instrumenter = ActiveSupport::Notifications.instrumenter
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@logger = logger
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@config = config
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@pool = ActiveRecord::ConnectionAdapters::NullPool.new
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@idle_since = Concurrent.monotonic_time
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@visitor = arel_visitor
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@statements = build_statement_pool
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@lock = ActiveSupport::Concurrency::LoadInterlockAwareMonitor.new
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if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true })
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@prepared_statement_status = Concurrent::ThreadLocalVar.new(true)
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@visitor.extend(DetermineIfPreparableVisitor)
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else
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#@prepared_statement_status = Concurrent::ThreadLocalVar.new(false)
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@prepared_statement_status = StaticThreadLocalVar.new(false)
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end
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@advisory_locks_enabled = self.class.type_cast_config_to_boolean(
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config.fetch(:advisory_locks, true)
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)
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end
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end
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end
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end
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