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-module(mongoose_mnesia). |
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-export([create_table/2]). |
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-include("mongoose.hrl"). |
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%% @doc A wrapper around `mnesia:create_table/2': |
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%% - Automatically adds table copies. |
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%% - Checks that mnesia is running or fail with an error. |
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%% - Checks result of create_table |
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-spec create_table(atom(), list()) -> |
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{atomic, ok} | {aborted, {already_exists, atom()}}. |
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create_table(Table, Opts) -> |
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case mnesia:system_info(is_running) of |
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no -> |
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:-( |
report_mnesia_table_error(Table, Opts, mnesia_not_running); |
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yes -> |
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Res = mnesia:create_table(Table, Opts), |
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check_create_table_result(Table, Opts, Res), |
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Res |
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end. |
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check_create_table_result(_Table, _Opts, {atomic, ok}) -> |
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ok; |
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check_create_table_result(Table, Opts, {aborted, {already_exists, Table}}) -> |
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[maybe_add_copies(Table, Opts, Type) || Type <- table_types()], |
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ok; |
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check_create_table_result(Table, Opts, Res) -> |
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:-( |
report_mnesia_table_error(Table, Opts, Res). |
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table_types() -> |
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[disc_copies, disc_only_copies, ram_copies]. |
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report_mnesia_table_error(Table, Opts, Res) -> |
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:-( |
?LOG_CRITICAL(#{what => mnesia_create_table_failed, |
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table => Table, create_opts => Opts, reason => Res, |
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:-( |
schema_nodes => catch mnesia:table_info(schema, disc_copies)}), |
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:-( |
error({mnesia_create_table_failed, Table, Res}). |
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maybe_add_copies(Table, Opts, Type) -> |
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case proplists:get_value(Type, Opts) of |
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[_|_] -> |
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mnesia:add_table_copy(Table, node(), Type), |
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ok; |
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_ -> |
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ok |
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end. |