milvus/internal/util/mqclient/rmq_client.go

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// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
// or implied. See the License for the specific language governing permissions and limitations under the License.
package mqclient
import (
"strconv"
"go.uber.org/zap"
"github.com/milvus-io/milvus/internal/log"
"github.com/milvus-io/milvus/internal/util/rocksmq/client/rocksmq"
)
type rmqClient struct {
client rocksmq.Client
}
func NewRmqClient(opts rocksmq.ClientOptions) (*rmqClient, error) {
c, err := rocksmq.NewClient(opts)
if err != nil {
log.Error("Set rmq client failed, error", zap.Error(err))
return nil, err
}
return &rmqClient{client: c}, nil
}
func (rc *rmqClient) CreateProducer(options ProducerOptions) (Producer, error) {
rmqOpts := rocksmq.ProducerOptions{Topic: options.Topic}
pp, err := rc.client.CreateProducer(rmqOpts)
if err != nil {
return nil, err
}
rp := rmqProducer{p: pp}
return &rp, nil
}
func (rc *rmqClient) Subscribe(options ConsumerOptions) (Consumer, error) {
receiveChannel := make(chan rocksmq.ConsumerMessage, options.BufSize)
cli, err := rc.client.Subscribe(rocksmq.ConsumerOptions{
Topic: options.Topic,
SubscriptionName: options.SubscriptionName,
MessageChannel: receiveChannel,
})
if err != nil {
return nil, err
}
msgChannel := make(chan ConsumerMessage, 1)
rConsumer := &rmqConsumer{c: cli, msgChannel: msgChannel}
go func() {
for { //nolint:gosimple
select {
case msg, ok := <-rConsumer.c.Chan():
if !ok {
close(msgChannel)
return
}
msg.Topic = options.Topic
msgChannel <- &rmqMessage{msg: msg}
}
}
}()
return rConsumer, nil
}
func (rc *rmqClient) EarliestMessageID() MessageID {
rID := rocksmq.EarliestMessageID()
return &rmqID{messageID: rID}
}
func (rc *rmqClient) StringToMsgID(id string) (MessageID, error) {
rID, err := strconv.ParseInt(id, 10, 64)
if err != nil {
return nil, err
}
return &rmqID{messageID: rID}, nil
}
func (rc *rmqClient) BytesToMsgID(id []byte) (MessageID, error) {
rID, err := DeserializeRmqID(id)
if err != nil {
return nil, err
}
return &rmqID{messageID: rID}, nil
}
func (rc *rmqClient) Close() {
rc.client.Close()
}