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feat: migrate kafka consumer bridge to source + connector #12595
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zhongwencool
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emqx:master
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thalesmg:kafka-consumer-source-m-20240223
Mar 1, 2024
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105 changes: 105 additions & 0 deletions
105
apps/emqx_bridge_kafka/src/emqx_bridge_kafka_consumer_action_info.erl
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| %%-------------------------------------------------------------------- | ||
| %% Copyright (c) 2024 EMQ Technologies Co., Ltd. All Rights Reserved. | ||
| %%-------------------------------------------------------------------- | ||
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| -module(emqx_bridge_kafka_consumer_action_info). | ||
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| -behaviour(emqx_action_info). | ||
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| -export([ | ||
| is_source/0, | ||
| is_action/0, | ||
| bridge_v1_type_name/0, | ||
| action_type_name/0, | ||
| connector_type_name/0, | ||
| schema_module/0, | ||
| connector_action_config_to_bridge_v1_config/2, | ||
| bridge_v1_config_to_action_config/2 | ||
| ]). | ||
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| is_source() -> true. | ||
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| is_action() -> false. | ||
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| bridge_v1_type_name() -> kafka_consumer. | ||
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| action_type_name() -> kafka_consumer. | ||
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| connector_type_name() -> kafka_consumer. | ||
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| schema_module() -> emqx_bridge_kafka_consumer_schema. | ||
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| connector_action_config_to_bridge_v1_config(ConnectorConfig, ActionConfig) -> | ||
| V1Config1 = maps:remove(<<"connector">>, ActionConfig), | ||
| V1Config2 = emqx_utils_maps:deep_merge(ConnectorConfig, V1Config1), | ||
| V1Config3 = maybe_fabricate_topic_mapping(V1Config2), | ||
| {Params1, V1Config4} = maps:take(<<"parameters">>, V1Config3), | ||
| TopLevelCfgKeys = [to_bin(K) || {K, _} <- emqx_bridge_kafka:fields(consumer_opts), K =/= kafka], | ||
| TopLevelCfg = maps:with(TopLevelCfgKeys, Params1), | ||
| %% `topic' is v2-only | ||
| Params = maps:without([<<"topic">> | TopLevelCfgKeys], Params1), | ||
| V1Config5 = emqx_utils_maps:deep_merge(V1Config4, TopLevelCfg), | ||
| V1Config = emqx_utils_maps:update_if_present( | ||
| <<"resource_opts">>, | ||
| %% Slightly different from default source resource opts... | ||
| fun(RO) -> maps:with(v1_fields(connector_resource_opts), RO) end, | ||
| V1Config5 | ||
| ), | ||
| maps:put(<<"kafka">>, Params, V1Config). | ||
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| bridge_v1_config_to_action_config(BridgeV1Conf, ConnectorName) -> | ||
| Config0 = emqx_action_info:transform_bridge_v1_config_to_action_config( | ||
| BridgeV1Conf, ConnectorName, schema_module(), source_parameters | ||
| ), | ||
| TopicMapping = maps:get(<<"topic_mapping">>, BridgeV1Conf, []), | ||
| Params0 = maps:get(<<"kafka">>, BridgeV1Conf, #{}), | ||
| Params1 = maps:with(source_parameters_field_keys(), Params0), | ||
| Params2 = emqx_utils_maps:put_if( | ||
| Params1, <<"topic_mapping">>, TopicMapping, TopicMapping =/= [] | ||
| ), | ||
| Params = maybe_set_kafka_topic(Params2), | ||
| {source, action_type_name(), maps:put(<<"parameters">>, Params, Config0)}. | ||
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| %%------------------------------------------------------------------------------------------ | ||
| %% Internal helper functions | ||
| %%------------------------------------------------------------------------------------------ | ||
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| %% The new schema has a single kafka topic, so we take it from topic mapping when | ||
| %% converting from v1. | ||
| maybe_set_kafka_topic(#{<<"topic_mapping">> := [#{<<"kafka_topic">> := Topic} | _]} = Params) -> | ||
| Params#{<<"topic">> => Topic}; | ||
| maybe_set_kafka_topic(Params) -> | ||
| Params. | ||
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| %% The old schema requires `topic_mapping', which is now hidden. | ||
| maybe_fabricate_topic_mapping(#{<<"parameters">> := Params0} = BridgeV1Config0) -> | ||
| #{<<"topic">> := Topic} = Params0, | ||
| case maps:get(<<"topic_mapping">>, Params0, undefined) of | ||
| [_ | _] -> | ||
| BridgeV1Config0; | ||
| _ -> | ||
| %% Have to fabricate an MQTT topic, unfortunately... QoS and payload already | ||
| %% have defaults. | ||
| FakeTopicMapping = #{ | ||
| <<"kafka_topic">> => Topic, | ||
| <<"mqtt_topic">> => <<>> | ||
| }, | ||
| Params = Params0#{<<"topic_mapping">> => [FakeTopicMapping]}, | ||
| BridgeV1Config0#{<<"parameters">> := Params} | ||
| end. | ||
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| v1_fields(StructName) -> | ||
| [ | ||
| to_bin(K) | ||
| || {K, _} <- emqx_bridge_kafka:fields(StructName) | ||
| ]. | ||
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| source_parameters_field_keys() -> | ||
| [ | ||
| to_bin(K) | ||
| || {K, _} <- emqx_bridge_kafka_consumer_schema:fields(source_parameters) | ||
| ]. | ||
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| to_bin(B) when is_binary(B) -> B; | ||
| to_bin(L) when is_list(L) -> list_to_binary(L); | ||
| to_bin(A) when is_atom(A) -> atom_to_binary(A, utf8). |
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🙈