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require "cases/helper"
require "models/project"
require "timeout"
class PooledConnectionsTest < ActiveRecord::TestCase
def setup
@per_test_teardown = []
@connection = ActiveRecord::Base.remove_connection
end
def teardown
ActiveRecord::Base.clear_all_connections!
ActiveRecord::Base.establish_connection(@connection)
@per_test_teardown.each {|td| td.call }
end
def checkout_connections
ActiveRecord::Base.establish_connection(@connection.merge({:pool => 2, :wait_timeout => 0.3}))
@connections = []
@timed_out = 0
4.times do
Thread.new do
begin
@connections << ActiveRecord::Base.connection_pool.checkout
rescue ActiveRecord::ConnectionTimeoutError
@timed_out += 1
end
end.join
end
end
# Will deadlock due to lack of Monitor timeouts in 1.9
if RUBY_VERSION < '1.9'
def test_pooled_connection_checkout
checkout_connections
assert_equal 2, @connections.length
assert_equal 2, @timed_out
end
end
def checkout_checkin_connections(pool_size, threads)
ActiveRecord::Base.establish_connection(@connection.merge({:pool => pool_size, :wait_timeout => 0.5}))
@connection_count = 0
@timed_out = 0
threads.times do
Thread.new do
begin
conn = ActiveRecord::Base.connection_pool.checkout
sleep 0.1
ActiveRecord::Base.connection_pool.checkin conn
@connection_count += 1
rescue ActiveRecord::ConnectionTimeoutError
@timed_out += 1
end
end.join
end
end
def test_pooled_connection_checkin_one
checkout_checkin_connections 1, 2
assert_equal 2, @connection_count
assert_equal 0, @timed_out
assert_equal 1, ActiveRecord::Base.connection_pool.connections.size
end
def test_pooled_connection_checkin_two
checkout_checkin_connections 2, 3
assert_equal 3, @connection_count
assert_equal 0, @timed_out
assert_equal 1, ActiveRecord::Base.connection_pool.connections.size
end
def test_pooled_connection_checkout_existing_first
ActiveRecord::Base.establish_connection(@connection.merge({:pool => 1}))
conn_pool = ActiveRecord::Base.connection_pool
conn = conn_pool.checkout
conn_pool.checkin(conn)
conn = conn_pool.checkout
assert ActiveRecord::ConnectionAdapters::AbstractAdapter === conn
conn_pool.checkin(conn)
end
def test_not_connected_defined_connection_returns_false
ActiveRecord::Base.establish_connection(@connection)
assert ! ActiveRecord::Base.connected?
end
def test_undefined_connection_returns_false
old_handler = ActiveRecord::Base.connection_handler
ActiveRecord::Base.connection_handler = ActiveRecord::ConnectionAdapters::ConnectionHandler.new
assert ! ActiveRecord::Base.connected?
ensure
ActiveRecord::Base.connection_handler = old_handler
end
def test_with_connection_nesting_safety
ActiveRecord::Base.establish_connection(@connection.merge({:pool => 1, :wait_timeout => 0.1}))
before_count = Project.count
add_record('one')
ActiveRecord::Base.connection.transaction do
add_record('two')
# Have another thread try to screw up the transaction
Thread.new do
ActiveRecord::Base.connection.rollback_db_transaction
ActiveRecord::Base.connection_pool.release_connection
end
add_record('three')
end
after_count = Project.count
assert_equal 3, after_count - before_count
end
def test_connection_pool_callbacks
checked_out, checked_in = false, false
ActiveRecord::ConnectionAdapters::AbstractAdapter.class_eval do
set_callback(:checkout, :after) { checked_out = true }
set_callback(:checkin, :before) { checked_in = true }
end
@per_test_teardown << proc do
ActiveRecord::ConnectionAdapters::AbstractAdapter.class_eval do
reset_callbacks :checkout
reset_callbacks :checkin
end
end
checkout_checkin_connections 1, 1
assert checked_out
assert checked_in
end
private
def add_record(name)
ActiveRecord::Base.connection_pool.with_connection { Project.create! :name => name }
end
end unless current_adapter?(:FrontBase) || in_memory_db?
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