tarantool / crud / 5199459215

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94.12
/crud/common/stash.lua
1 
---- Module for preserving data between reloads.
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-- @module crud.common.stash
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--
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local dev_checks = require('crud.common.dev_checks')
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local utils = require('crud.common.utils')
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6 









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local stash = {}




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--- Available stashes list.










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--










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-- @tfield string cfg










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--  Stash for CRUD module configuration.










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--










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-- @tfield string stats_internal










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--  Stash for main stats module.










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--










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-- @tfield string stats_local_registry










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--  Stash for local metrics registry.










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--










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-- @tfield string stats_metrics_registry










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--  Stash for metrics rocks statistics registry.










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--










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-- @tfield string select_module_compat_info










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--  Stash for select compatability version registry.










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--










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stash.name = {




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    cfg = '__crud_cfg',










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    stats_internal = '__crud_stats_internal',










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    stats_local_registry = '__crud_stats_local_registry',










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    stats_metrics_registry = '__crud_stats_metrics_registry',










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    ddl_triggers = '__crud_ddl_spaces_triggers',










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    select_module_compat_info = '__select_module_compat_info',










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}




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--- Setup Tarantool Cartridge reload.










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--










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--  Call on Tarantool Cartridge roles that are expected










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--  to use stashes.










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--










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-- @function setup_cartridge_reload










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--










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-- @return Returns










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--










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function stash.setup_cartridge_reload()




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    local hotreload_supported, hotreload = utils.is_cartridge_hotreload_supported()




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    if not hotreload_supported then




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        return




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    end










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    for _, name in pairs(stash.name) do




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        hotreload.whitelist_globals({ name })




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    end










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end










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--- Get a stash instance, initialize if needed.










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--










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--  Stashes are persistent to package reload.










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--  To use them with Cartridge roles reload,










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--  call `stash.setup_cartridge_reload` in role.










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--










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-- @function get










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--










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-- @string name










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--  Stash identifier. Use one from `stash.name` table.










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--










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-- @treturn table A stash instance.










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--










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function stash.get(name)




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    dev_checks('string')




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    local instance = rawget(_G, name) or {}




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    rawset(_G, name, instance)




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    return instance




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end










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return stash




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