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consumer_group.go
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consumer_group.go
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// Copyright © 2023 OpenIM. 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 kafka
import (
"context"
"errors"
"github.com/IBM/sarama"
"github.com/openimsdk/tools/log"
)
type MConsumerGroup struct {
sarama.ConsumerGroup
groupID string
topics []string
}
func NewMConsumerGroup(conf *Config, groupID string, topics []string) (*MConsumerGroup, error) {
config, err := BuildConsumerGroupConfig(conf, sarama.OffsetNewest)
if err != nil {
return nil, err
}
group, err := NewConsumerGroup(config, conf.Addr, groupID)
if err != nil {
return nil, err
}
return &MConsumerGroup{
ConsumerGroup: group,
groupID: groupID,
topics: topics,
}, nil
}
func (mc *MConsumerGroup) GetContextFromMsg(cMsg *sarama.ConsumerMessage) context.Context {
return GetContextWithMQHeader(cMsg.Headers)
}
func (mc *MConsumerGroup) RegisterHandleAndConsumer(ctx context.Context, handler sarama.ConsumerGroupHandler) {
for {
err := mc.ConsumerGroup.Consume(ctx, mc.topics, handler)
if errors.Is(err, sarama.ErrClosedConsumerGroup) {
return
}
if errors.Is(err, context.Canceled) {
return
}
if err != nil {
log.ZWarn(ctx, "consume err", err, "topic", mc.topics, "groupID", mc.groupID)
}
}
}
func (mc *MConsumerGroup) Close() error {
return mc.ConsumerGroup.Close()
}