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gh_8663_persistent_triggers_test.lua
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gh_8663_persistent_triggers_test.lua
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local cluster = require('luatest.replica_set')
local server = require('luatest.server')
local t = require('luatest')
local g = t.group('Persistent triggers on a single node')
g.before_each(function()
g.server = server:new{
alias = 'default',
}
g.server:start()
end)
g.after_each(function()
g.server:drop()
g.server = nil
end)
g.test_recovery = function()
g.server:exec(function()
local trigger = require('trigger')
local max_i = 5
local event_name = 'persistent_event'
trigger.set(event_name, 'not_truly_persistent' .. tostring(max_i + 1),
function() end)
for i = max_i, 1, -1 do
box.schema.func.create('truly_persistent' .. tostring(i), {
language = 'lua', body = 'function() end', trigger = event_name
})
trigger.set(event_name, 'not_truly_persistent' .. tostring(i),
function() end)
end
local triggers = trigger.info(event_name)[event_name]
t.assert_equals(#triggers, max_i * 2 + 1)
for i = 1, max_i do
t.assert_equals(triggers[i * 2 - 1][1],
'not_truly_persistent' .. tostring(i))
t.assert_equals(triggers[i * 2][1],
'truly_persistent' .. tostring(i))
end
t.assert_equals(triggers[max_i * 2 + 1][1],
'not_truly_persistent' .. tostring(max_i + 1))
end)
-- Check that triggers are truly persistent and the order is saved.
g.server:restart()
g.server:exec(function()
local trigger = require('trigger')
local max_i = 5
local event_name = 'persistent_event'
local triggers = trigger.info(event_name)[event_name]
t.assert_equals(#triggers, max_i)
for i = 1, max_i do
t.assert_equals(triggers[i][1], 'truly_persistent' .. tostring(i))
end
end)
end
g.test_transactional = function()
g.server:exec(function()
local trigger = require('trigger')
local event_name = 'tx_event'
local trigger_name = 'test.rollback'
local origin_trigger = {"I am an origin trigger!"}
local mt = {}
mt.__call = function() end
setmetatable(origin_trigger, mt)
-- Check that rollback deletes trigger.
t.assert_equals(trigger.info(event_name), {})
box.begin()
box.schema.func.create(trigger_name,
{language = 'lua', trigger = event_name})
t.assert_equals(#trigger.info(event_name)[event_name], 1)
box.rollback()
t.assert_equals(trigger.info(event_name), {})
-- Check that persistent trigger replaces another one but does not
-- restore replaced trigger after rollback.
trigger.set(event_name, trigger_name, origin_trigger)
box.begin()
box.schema.func.create(trigger_name,
{language = 'lua', trigger = event_name})
t.assert_not_equals(trigger.info(event_name)[event_name][1][2],
origin_trigger)
box.rollback()
t.assert_equals(trigger.info(event_name), {})
-- Check that deletion before rollback does not break tarantool
box.begin()
box.schema.func.create(trigger_name,
{language = 'lua', trigger = event_name})
t.assert_equals(#trigger.info(event_name)[event_name], 1)
trigger.del(event_name, trigger_name)
t.assert_equals(trigger.info(event_name), {})
box.rollback()
t.assert_equals(trigger.info(event_name), {})
end)
end
g.test_several_events = function()
g.server:exec(function()
local trigger = require('trigger')
local event_names = {'event1', 'event2', 'event3'}
local trigger_name = 'test.several_events'
local origin_trigger = {"I am an origin trigger!"}
local mt = {}
mt.__call = function() end
setmetatable(origin_trigger, mt)
for _, event_name in pairs(event_names) do
t.assert_equals(trigger.info(event_name), {})
end
box.schema.func.create(trigger_name,
{language = 'lua', trigger = event_names})
for _, event_name in pairs(event_names) do
t.assert_equals(#trigger.info(event_name)[event_name], 1)
end
box.schema.func.drop(trigger_name)
for _, event_name in pairs(event_names) do
t.assert_equals(trigger.info(event_name), {})
end
end)
end
-- Test if persisitent trigger cannot be dropped while it is running.
g.test_drop_while_running = function()
g.server:exec(function()
local trigger = require('trigger')
local event_name = 'test.drop_while_running'
local func_name = 'test_func'
local errmsg = nil
local function handler()
local _, err = pcall(box.schema.func.drop, func_name)
errmsg = err.message
end
rawset(_G, func_name, handler)
box.schema.func.create(func_name,
{language = 'lua', trigger = event_name})
trigger.call(event_name)
local expected_errmsg = string.format(
"Can't drop function %d: function is referenced by trigger",
box.func[func_name].id)
t.assert_equals(errmsg, expected_errmsg)
box.schema.func.drop(func_name)
end)
end
-- Test that both persistent and non-persistent functions are called correctly
-- by module trigger.
g.test_call_from_module_trigger = function()
g.server:exec(function()
local trigger = require('trigger')
local event_names = {'test.call[1]', 'test.call[2]', 'test.call[3]'}
local trigger_names = {'test.call[2]', 'test.call[1]'}
rawset(_G, 'state', {})
local bodies = {
'function(a, b, c, d) table.insert(state, {2, a, b, c, d}) end',
'function(a, b, c, d) table.insert(state, {1, a, b, c, d}) end'
}
for i = 1, #bodies do
box.schema.func.create(trigger_names[i],
{language = 'lua', trigger = event_names, body = bodies[i]})
end
rawset(_G, 'not_persistent_func', function(a, b, c, d)
table.insert(_G.state, {0, a, b, c, d})
end)
box.schema.func.create('not_persistent_func',
{language = 'lua', trigger = event_names})
for i = 1, #event_names do
trigger.call(event_names[i])
t.assert_equals(_G.state, {{0}, {1}, {2}})
_G.state = {}
trigger.call(event_names[i], 'a', nil, 'b', 10)
t.assert_equals(_G.state, {
{0, 'a', nil, 'b', 10},
{1, 'a', nil, 'b', 10},
{2, 'a', nil, 'b', 10}
})
_G.state = {}
end
rawset(_G, 'state', nil)
rawset(_G, 'not_persistent_func', nil)
end)
end
-- Test that deleted function cannot be used.
g.test_pairs_safety_in_module_trigger = function()
g.server:exec(function()
local trigger = require('trigger')
local event_name = 'test.pairs_safety'
local func_name = 'test_func'
local func_call_count = 0
local handler = function()
func_call_count = func_call_count + 1
end
rawset(_G, func_name, handler)
box.schema.func.create(func_name,
{language = 'lua', trigger = event_name})
local gen, param = trigger.pairs(event_name)
local _, handler = gen(param)
handler()
t.assert_equals(func_call_count, 1, "Handler should be called normally")
local errmsg = string.format(
"Can't drop function 66: function is referenced by trigger",
box.func[func_name].id)
t.assert_error_msg_content_equals(errmsg, box.schema.func.drop,
func_name)
gen(param)
handler()
t.assert_equals(func_call_count, 2,
"Handler is still alive even if not referenced by iterator")
box.schema.func.drop(func_name)
errmsg = "Trigger was deleted"
t.assert_error_msg_content_equals(errmsg, handler)
t.assert_equals(func_call_count, 2,
"Handler was deleted - it mustn't be called")
end)
end
local g = t.group('Persistent triggers in a cluster')
g.before_each(function()
g.cluster = cluster:new({})
local box_cfg = {replication = {
server.build_listen_uri('server1', g.cluster.id),
server.build_listen_uri('server2', g.cluster.id)
}}
g.server1 = g.cluster:build_server({alias = 'server1', box_cfg = box_cfg})
g.server2 = g.cluster:build_server({alias = 'server2', box_cfg = box_cfg})
g.cluster:add_server(g.server1)
g.cluster:add_server(g.server2)
g.cluster:start()
end)
g.after_each(function()
g.cluster:drop()
end)
-- The test checks a scenario with a non-idempotent replicated trigger in
-- master-master replication. The trigger must be applied on each server.
-- To provide exactly-once semantics, we check `box.session.type()` in trigger.
g.test_replicated_non_idempotent_trigger = function(g)
local expected_result = {
{'cat', 6000},
{'crocodile', 600000},
{'dog', 10000},
{'elephant', 4000000}
}
g.server1:exec(function()
-- Transform kilogramms to gramms on actual replace, not replication
local body = [[
function(old_tuple, new_tuple)
if box.session.type() ~= 'applier' then
return box.tuple.new{new_tuple[1], new_tuple[2] * 1000}
end
end
]]
local event = 'box.space.weights.before_replace'
box.schema.func.create('example.replicated_trigger',
{body = body, trigger = event})
box.schema.space.create('weights')
box.space.weights:format({
{name = 'name', type = 'string'},
{name = 'gramms', type = 'unsigned'},
})
box.space.weights:create_index('primary', {parts = {'name'}})
box.space.weights:replace{'elephant', 4000}
box.space.weights:replace{'crocodile', 600}
end)
-- Wait for the trigger and the space to arrive on the second server
g.server2:wait_for_vclock_of(g.server1)
g.server2:exec(function()
box.space.weights:replace{'cat', 6}
box.space.weights:replace{'dog', 10}
end)
-- Wait for the writes to arrive on the first server
g.server1:wait_for_vclock_of(g.server2)
local check_case = function(expected_result)
t.assert_equals(box.space.weights:select(nil, {fullscan=true}),
expected_result)
end
g.server1:exec(check_case, {expected_result})
g.server2:exec(check_case, {expected_result})
end