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-module(mongoose_instrument_registry). |
| 2 |
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| 3 |
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-export([start/0, attach/3, detach/2, lookup/2]). |
| 4 |
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| 5 |
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-spec start() -> ok. |
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start() -> |
| 7 |
103 |
ets:new(?MODULE, [named_table, public, {read_concurrency, true}]), |
| 8 |
103 |
ok. |
| 9 |
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| 10 |
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-spec attach(mongoose_instrument:event_name(), mongoose_instrument:labels(), |
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mongoose_instrument:handlers()) -> ok | {error, already_attached}. |
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attach(Event, Labels, Val) -> |
| 13 |
:-( |
case ets:insert_new(?MODULE, {{Event, Labels}, Val}) of |
| 14 |
:-( |
true -> ok; |
| 15 |
:-( |
false -> {error, already_attached} |
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end. |
| 17 |
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| 18 |
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-spec detach(mongoose_instrument:event_name(), mongoose_instrument:labels()) -> ok. |
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detach(Event, Labels) -> |
| 20 |
:-( |
ets:delete(?MODULE, {Event, Labels}), |
| 21 |
:-( |
ok. |
| 22 |
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| 23 |
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-spec lookup(mongoose_instrument:event_name(), mongoose_instrument:labels()) -> |
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{ok, mongoose_instrument:handlers()} | {error, not_found}. |
| 25 |
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lookup(Event, Labels) -> |
| 26 |
:-( |
case ets:lookup(?MODULE, {Event, Labels}) of |
| 27 |
:-( |
[] -> {error, not_found}; |
| 28 |
:-( |
[{_, Val}] -> {ok, Val} |
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end. |