mirror of https://github.com/milvus-io/milvus.git
77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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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package nmq
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import (
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"log"
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"github.com/nats-io/nats.go"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/pkg/mq/msgstream/mqwrapper"
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)
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// Check nmqMessage implements ConsumerMessage
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var (
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_ mqwrapper.Message = (*nmqMessage)(nil)
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)
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// nmqMessage wraps the message for natsmq
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type nmqMessage struct {
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raw *nats.Msg
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// lazy initialized field.
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meta *nats.MsgMetadata
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}
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// Topic returns the topic name of natsmq message
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func (nm *nmqMessage) Topic() string {
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// TODO: Dependency: implement of subscription logic of nmq.
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// 1:1 Subject:Topic model is appied on this implementation.
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// M:N model should be a optimize option in future.
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return nm.raw.Subject
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}
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// Properties returns the properties of natsmq message
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func (nm *nmqMessage) Properties() map[string]string {
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properties := make(map[string]string, len(nm.raw.Header))
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for k, vs := range nm.raw.Header {
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if len(vs) > 0 {
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properties[k] = vs[0]
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}
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}
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return properties
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}
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// Payload returns the payload of natsmq message
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func (nm *nmqMessage) Payload() []byte {
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return nm.raw.Data
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}
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// ID returns the id of natsmq message
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func (nm *nmqMessage) ID() mqwrapper.MessageID {
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if nm.meta == nil {
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var err error
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// raw is always a jetstream message, should never fail.
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nm.meta, err = nm.raw.Metadata()
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if err != nil {
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log.Fatal("raw is always a jetstream message, should never fail", zap.Error(err))
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}
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}
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return &nmqID{messageID: nm.meta.Sequence.Stream}
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}
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