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consumer.go
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consumer.go
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/*
*
* Copyright 2020 waterdrop authors.
*
* 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 rocketmq
import (
"context"
"fmt"
"strings"
rocketmq "github.com/apache/rocketmq-client-go/v2"
"github.com/apache/rocketmq-client-go/v2/consumer"
"github.com/apache/rocketmq-client-go/v2/primitive"
)
// ConsumerConfig RocketMQ consumer config
type ConsumerConfig struct {
Endpoint []string
AccessKey string
SecretKey string
Topic string
Gid string
Tags []string
Retry int32
Orderly bool
interceptors []primitive.Interceptor
}
// PushConsumer push consumer mode
type PushConsumer struct {
consumer rocketmq.PushConsumer
config *ConsumerConfig
}
// NewPushConsumer returns a PushConsumer instance
func NewPushConsumer(config *ConsumerConfig) *PushConsumer {
var credentials = primitive.Credentials{
AccessKey: config.AccessKey,
SecretKey: config.SecretKey,
}
consumer, err := rocketmq.NewPushConsumer(
consumer.WithNsResolver(primitive.NewPassthroughResolver(config.Endpoint)),
consumer.WithCredentials(credentials),
consumer.WithGroupName(config.Gid),
consumer.WithConsumerOrder(config.Orderly),
consumer.WithMaxReconsumeTimes(config.Retry),
consumer.WithInterceptor(pushConsumerMetricInterceptor(config)),
consumer.WithInterceptor(config.interceptors...),
)
if err != nil {
panic(fmt.Sprintf("init consumer fail, err msg: %s", err.Error()))
}
pc := &PushConsumer{
consumer: consumer,
config: config,
}
return pc
}
// Start start consumer
func (pc *PushConsumer) Start() error {
return pc.consumer.Start()
}
// Shutdown consumer
func (pc *PushConsumer) Shutdown() error {
return pc.consumer.Shutdown()
}
// Subscribe subscribe topic
func (pc *PushConsumer) Subscribe(cb func(context.Context, *primitive.MessageExt) error) *PushConsumer {
selector := consumer.MessageSelector{
Type: consumer.TAG,
Expression: strings.Join(pc.config.Tags, "||"),
}
err := pc.consumer.Subscribe(pc.config.Topic, selector, func(ctx context.Context, msgs ...*primitive.MessageExt) (consumer.ConsumeResult, error) {
for _, msg := range msgs {
err := cb(ctx, msg)
if err != nil {
return consumer.ConsumeRetryLater, err
}
}
return consumer.ConsumeSuccess, nil
})
if err != nil {
panic(fmt.Sprintf("subscribe rocketmq fail, err msg: %s", err.Error()))
}
return pc
}