91 lines
1.8 KiB
Ruby
91 lines
1.8 KiB
Ruby
module Scheduler
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module Deferrable
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def initialize
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@async = !Rails.env.test?
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@queue = Queue.new
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@mutex = Mutex.new
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@paused = false
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@thread = nil
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end
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def length
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@queue.length
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end
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def pause
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stop!
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@paused = true
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end
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def resume
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@paused = false
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end
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# for test
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def async=(val)
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@async = val
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end
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def later(desc = nil, db = RailsMultisite::ConnectionManagement.current_db, &blk)
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if @async
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start_thread unless (@thread && @thread.alive?) || @paused
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@queue << [db, blk, desc]
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else
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blk.call
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end
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end
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def stop!
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@thread.kill if @thread && @thread.alive?
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@thread = nil
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end
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# test only
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def stopped?
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!(@thread && @thread.alive?)
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end
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def do_all_work
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while !@queue.empty?
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do_work(_non_block = true)
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end
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end
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private
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def start_thread
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@mutex.synchronize do
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return if @thread && @thread.alive?
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@thread = Thread.new {
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while true
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do_work
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end
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}
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end
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end
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# using non_block to match Ruby #deq
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def do_work(non_block = false)
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db, job, desc = @queue.deq(non_block)
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db ||= RailsMultisite::ConnectionManagement::DEFAULT
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RailsMultisite::ConnectionManagement.with_connection(db) do
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begin
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job.call
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rescue => ex
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Discourse.handle_job_exception(ex, message: "Running deferred code '#{desc}'")
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end
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end
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rescue => ex
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Discourse.handle_job_exception(ex, message: "Processing deferred code queue")
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ensure
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ActiveRecord::Base.connection_handler.clear_active_connections!
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end
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end
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class Defer
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extend Deferrable
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initialize
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end
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end
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