api: forbid using space id in len

Using space id instead of a space name in sharded systems may be
dangerous until one sets all space id manually. This is a breaking
change. The feature was deprecated since 0.14.0.

Closes #255

Author: DifferentialOrange

crud/len.lua

@@ -42,23 +42,13 @@ end
 -- @treturn[2] table Error description
 --
 function len.call(space_name, opts)
-    checks('string|number', {
+    checks('string', {
         timeout = '?number',
         vshard_router = '?string|table',
     })
 
     opts = opts or {}
 
-    if type(space_name) == 'number' then
-        log.warn('Using space id in crud.len is deprecated and will be removed in future releases.' ..
-                 'Please, use space name instead.')
-
-        if opts.vshard_router ~= nil then
-            log.warn('Using space id in crud.len and custom vshard_router is not supported by statistics.' ..
-                     'Space labels may be inconsistent.')
-        end
-    end
-
     local vshard_router, err = utils.get_vshard_router_instance(opts.vshard_router)
     if err ~= nil then
         return nil, LenError:new(err)

crud/stats/init.lua

@@ -249,34 +249,6 @@ function stats.get(space_name)
     return internal:get_registry().get(space_name)
 end
 
-local function resolve_space_name(space_id)
-    -- Resolving name with custom vshard router is not supported.
-    local vshard_router = vshard.router.static
-
-    if vshard_router == nil then
-        log.warn('Failed to resolve space name for stats: default vshard router not found')
-        return nil
-    end
-
-    local replicasets = vshard_router:routeall()
-    if next(replicasets) == nil then
-        log.warn('Failed to resolve space name for stats: no replicasets found with default router')
-        return nil
-    end
-
-    local space, err = utils.get_space(space_id, vshard_router)
-    if err ~= nil then
-        log.warn("An error occurred during getting space: %s", err)
-        return nil
-    end
-    if space == nil then
-        log.warn('Failed to resolve space name for stats: no space found for id %d with default router', space_id)
-        return nil
-    end
-
-    return space.name
-end
-
 -- Hack to set __gc for a table in Lua 5.1
 -- See https://stackoverflow.com/questions/27426704/lua-5-1-workaround-for-gc-metamethod-for-tables
 -- or https://habr.com/ru/post/346892/
@@ -351,26 +323,13 @@ local function wrap_pairs_gen(build_latency, space_name, op, gen, param, state)
 end
 
 local function wrap_tail(space_name, op, pairs, start_time, call_status, ...)
-    dev_checks('string|number', 'string', 'boolean', 'number', 'boolean')
+    dev_checks('string', 'string', 'boolean', 'number', 'boolean')
 
     local finish_time = clock.monotonic()
     local latency = finish_time - start_time
 
     local registry = internal:get_registry()
 
-    -- If space id is provided instead of name, try to resolve name.
-    -- If resolve have failed, use id as string to observe space.
-    -- If using space id will be deprecated, remove this code as well,
-    -- see https://github.com/tarantool/crud/issues/255
-    if type(space_name) ~= 'string' then
-        local name = resolve_space_name(space_name)
-        if name ~= nil then
-            space_name = name
-        else
-            space_name = tostring(space_name)
-        end
-    end
-
     if call_status == false then
         registry.observe(latency, space_name, op, 'error')
         error((...), 2)

test/integration/stats_test.lua

@@ -752,24 +752,6 @@ for name, case in pairs(select_cases) do
 end
 
 
-pgroup.test_resolve_name_from_id = function(g)
-    local op = 'len'
-    g.router:call('crud.len', { space_id })
-
-    local stats = get_stats(g, space_name)
-    t.assert_not_equals(stats[op], nil, "Statistics is filled by name")
-end
-
-
-pgroup.test_resolve_nonexisting_space_from_id = function(g)
-    local op = 'len'
-    g.router:call('crud.len', { non_existing_space_id })
-
-    local stats = get_stats(g, tostring(non_existing_space_id))
-    t.assert_not_equals(stats[op], nil, "Statistics is filled by id as string")
-end
-
-
 pgroup.before_test(
     'test_role_reload_do_not_reset_observations',
     generate_stats)