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consumer.go
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consumer.go
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package rocketmq5Kit
import (
rmq_client "github.com/apache/rocketmq-clients/golang/v5"
"github.com/richelieu-yang/chimera/v3/src/core/errorKit"
"github.com/richelieu-yang/chimera/v3/src/core/mapKit"
"github.com/richelieu-yang/chimera/v3/src/core/sliceKit"
"github.com/richelieu-yang/chimera/v3/src/core/strKit"
)
// NewSimpleConsumer
/*
PS:
(1) In most case, you don't need to create many consumers, singletion pattern is more recommended.
(2) 需要先 set up!!!
(3) 第一个返回值,非nil的情况下,不再需要时请调用 GracefulStop().
@param consumerGroup 不能为""
@param subscriptionExpressions (1) key: topic,不能为 "*" || blank
(2) value: tag,一般为 rmq_client.SUB_ALL
@param clientLogPath 客户端日志(blank则输出到控制台)
*/
func NewSimpleConsumer(consumerGroup string, subscriptionExpressions map[string]*rmq_client.FilterExpression) (rmq_client.SimpleConsumer, error) {
if config == nil {
return nil, NotSetupError
}
if err := strKit.AssertNotEmpty(consumerGroup, "consumerGroup"); err != nil {
return nil, err
}
if err := mapKit.AssertNotEmpty(subscriptionExpressions, "subscriptionExpressions"); err != nil {
return nil, err
}
endpoint := sliceKit.Join(config.Endpoints, ";")
simpleConsumer, err := rmq_client.NewSimpleConsumer(&rmq_client.Config{
Endpoint: endpoint,
ConsumerGroup: consumerGroup,
Credentials: config.Credentials,
},
rmq_client.WithAwaitDuration(DefaultAwaitDuration),
rmq_client.WithSubscriptionExpressions(subscriptionExpressions),
)
if err != nil {
return nil, errorKit.Wrapf(err, "Fail to new simple consumer")
}
if err := simpleConsumer.Start(); err != nil {
return nil, errorKit.Wrapf(err, "Fail to start simple consumer")
}
return simpleConsumer, nil
}