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+ require 'concurrent/executor/executor'
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+
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+ module Concurrent
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+ # An executor service which runs all operations on a new thread, blocking
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+ # until it completes. Operations are performed in the order they are received
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+ # and no two operations can be performed simultaneously.
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+ #
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+ # This executor service exists mainly for testing an debugging. When used it
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+ # immediately runs every `#post` operation on a new thread, blocking the
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+ # current thread until the operation is complete. This is similar to how the
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+ # ImmediateExecutor works, but the operation has the full stack of the new
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+ # thread at its disposal. This can be helpful when the operations will spawn
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+ # more operations on the same executor and so on - such a situation might
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+ # overflow the single stack in case of an ImmediateExecutor, which is
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+ # inconsistent with how it would behave for a threaded executor.
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+ #
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+ # @note Intended for use primarily in testing and debugging.
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+ class IndirectImmediateExecutor < ImmediateExecutor
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+ # Creates a new executor
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+ def initialize
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+ super
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+ @internal_executor = PerThreadExecutor . new
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+ end
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+
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+ # @!macro executor_method_post
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+ def post ( *args , &task )
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+ raise ArgumentError . new ( "no block given" ) unless block_given?
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+ return false unless running?
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+
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+ event = Concurrent ::Event . new
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+ internal_executor . post do
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+ begin
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+ task . call ( *args )
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+ ensure
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+ event . set
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+ end
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+ end
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+ event . wait
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+
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+ true
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+ end
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+
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+ private
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+ attr_reader :internal_executor
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+ end
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+ end
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require 'concurrent/executor/cached_thread_pool'
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require 'concurrent/executor/fixed_thread_pool'
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require 'concurrent/executor/immediate_executor'
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+ require 'concurrent/executor/indirect_immediate_executor'
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require 'concurrent/executor/per_thread_executor'
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require 'concurrent/executor/safe_task_executor'
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require 'concurrent/executor/single_thread_executor'
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+ require 'spec_helper'
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+ require_relative 'executor_service_shared'
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+
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+ module Concurrent
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+
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+ describe IndirectImmediateExecutor do
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+
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+ subject { IndirectImmediateExecutor . new }
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+
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+ it_should_behave_like :executor_service
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+
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+ it "runs its tasks synchronously" do
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+ start = Time . now
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+ subject . post { sleep 0.1 }
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+
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+ expect ( Time . now - start ) . to be >= 0.1
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+ end
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+
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+ it "runs the task on a separate thread" do
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+ used_thread = nil
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+ subject . post { used_thread = Thread . current }
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+
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+ expect ( used_thread ) . not_to be ( Thread . current )
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+ end
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+ end
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+ end
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