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subscription_group_config.go
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subscription_group_config.go
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package subscription
import (
"fmt"
"github.com/ttstringiot/golangiot/stgcommon"
)
// SubscriptionGroupConfig 订阅关系配置
// Author gaoyanlei
// Since 2017/8/9
type SubscriptionGroupConfig struct {
GroupName string `json:"groupName"` // 订阅组名
ConsumeEnable bool `json:"consumeEnable"` // 消费功能是否开启
ConsumeFromMinEnable bool `json:"consumeFromMinEnable"` // 是否允许从队列最小位置开始消费(线上默认会设置为false)
ConsumeBroadcastEnable bool `json:"consumeBroadcastEnable"` // 是否允许广播方式消费
RetryQueueNums int32 `json:"retryQueueNums"` // 每个订阅组配置几个重试队列(消费失败的消息放到一个重试队列)
RetryMaxTimes int32 `json:"retryMaxTimes"` // 重试消费最大次数(超过最大次数,则投递到死信队列并且不再投递,并报警)
BrokerId int64 `json:"brokerId"` // 从哪个Broker开始消费
WhichBrokerWhenConsumeSlowly int64 `json:"whichBrokerWhenConsumeSlowly"` // 发现消息堆积后,将Consumer的消费请求重定向到另外一台Slave机器
}
// NewSubscriptionGroupConfig 初始化SubscriptionGroupConfig
// Author gaoyanlei
// Since 2017/8/9
func NewSubscriptionGroupConfig() *SubscriptionGroupConfig {
return &SubscriptionGroupConfig{
ConsumeEnable: true,
ConsumeFromMinEnable: true,
ConsumeBroadcastEnable: true,
RetryQueueNums: 1, // 每个订阅组配置重试队列的个数
RetryMaxTimes: 16, // 重试消费最大次数
BrokerId: stgcommon.MASTER_ID,
}
}
// ToString 打印SubscriptionGroupConfig结构体数据
// Author: tianyuliang
// Since: 2017/10/13
func (self *SubscriptionGroupConfig) ToString() string {
if self == nil {
return "SubscriptionGroupConfig is nil"
}
format := "SubscriptionGroupConfig {groupName=%s, consumeEnable=%t, consumeFromMinEnable=%t, consumeBroadcastEnable=%t"
format += "retryQueueNums=%d, retryMaxTimes=%d, brokerId=%d, whichBrokerWhenConsumeSlowly=%d}"
info := fmt.Sprintf(format, self.GroupName, self.ConsumeEnable, self.ConsumeFromMinEnable, self.ConsumeBroadcastEnable,
self.RetryQueueNums, self.RetryMaxTimes, self.BrokerId, self.WhichBrokerWhenConsumeSlowly)
return info
}