47 lines
1.7 KiB
Erlang
47 lines
1.7 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2022-2024 EMQ Technologies Co., Ltd. All Rights Reserved.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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-ifndef(EMQX_MESSAGE_HRL).
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-define(EMQX_MESSAGE_HRL, true).
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%% See 'Application Message' in MQTT Version 5.0
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-record(message, {
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%% Global unique message ID
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id :: binary(),
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%% Message QoS
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qos = 0,
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%% Message from
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from :: atom() | binary(),
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%% Message flags
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flags = #{} :: emqx_types:flags(),
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%% Message headers. May contain any metadata. e.g. the
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%% protocol version number, username, peerhost or
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%% the PUBLISH properties (MQTT 5.0).
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headers = #{} :: emqx_types:headers(),
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%% Topic that the message is published to
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topic :: emqx_types:topic(),
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%% Message Payload
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payload :: emqx_types:payload(),
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%% Timestamp (Unit: millisecond)
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timestamp :: integer(),
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%% Miscellaneous extensions, currently used for OpenTelemetry context propagation
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%% and storing mqueue/inflight insertion timestamps.
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%% It was not used prior to 5.4.0 and defaulted to an empty list.
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%% Must be a map now.
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extra = #{} :: term()
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}).
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-endif.
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