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package routing
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import (
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amqp "github.com/rabbitmq/amqp091-go"
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"goskeleton/app/global/variable"
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"goskeleton/app/utils/rabbitmq/error_record"
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)
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// CreateProducer 创建一个生产者
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func CreateProducer(options ...OptionsProd) (*producer, error) {
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// 获取配置信息
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conn, err := amqp.Dial(variable.ConfigYml.GetString("RabbitMq.Routing.Addr"))
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exchangeType := variable.ConfigYml.GetString("RabbitMq.Routing.ExchangeType")
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exchangeName := variable.ConfigYml.GetString("RabbitMq.Routing.ExchangeName")
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queueName := variable.ConfigYml.GetString("RabbitMq.Routing.QueueName")
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durable := variable.ConfigYml.GetBool("RabbitMq.Routing.Durable")
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if err != nil {
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variable.ZapLog.Error(err.Error())
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return nil, err
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}
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prod := &producer{
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connect: conn,
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exchangeType: exchangeType,
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exchangeName: exchangeName,
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queueName: queueName,
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durable: durable,
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}
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// 加载用户设置的参数
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for _, val := range options {
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val.apply(prod)
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}
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return prod, nil
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}
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// 定义一个消息队列结构体：Routing 模型
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type producer struct {
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connect *amqp.Connection
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exchangeType string
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exchangeName string
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queueName string
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durable bool
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occurError error
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enableDelayMsgPlugin bool // 是否使用延迟队列模式
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args amqp.Table
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}
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// Send 发送消息
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// 参数：
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// routeKey 路由键、
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// data 发送的数据、
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// delayMillisecond 延迟时间(毫秒)，只有启用了消息延迟插件才有效果
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func (p *producer) Send(routeKey, data string, delayMillisecond int) bool {
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// 获取一个频道
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ch, err := p.connect.Channel()
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p.occurError = error_record.ErrorDeal(err)
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defer func() {
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_ = ch.Close()
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}()
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// 声明交换机，该模式生产者只负责将消息投递到交换机即可
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err = ch.ExchangeDeclare(
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p.exchangeName, //交换器名称
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p.exchangeType, //direct(定向消息), 按照路由键名匹配消息
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p.durable, //消息是否持久化
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!p.durable, //交换器是否自动删除
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false,
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false,
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p.args,
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)
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p.occurError = error_record.ErrorDeal(err)
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// 如果队列的声明是持久化的，那么消息也设置为持久化
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msgPersistent := amqp.Transient
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if p.durable {
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msgPersistent = amqp.Persistent
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}
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// 投递消息
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if err == nil {
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err = ch.Publish(
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p.exchangeName, // 交换机名称
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routeKey, // direct 模式默认为空即可
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false,
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false,
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amqp.Publishing{
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DeliveryMode: msgPersistent, //消息是否持久化，这里与保持保持一致即可
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ContentType: "text/plain",
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Body: []byte(data),
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Headers: amqp.Table{
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"x-delay": delayMillisecond, // 延迟时间: 毫秒
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},
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})
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}
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p.occurError = error_record.ErrorDeal(err)
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if p.occurError != nil { // 发生错误，返回 false
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return false
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} else {
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return true
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}
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}
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// Close 发送完毕手动关闭，这样不影响send多次发送数据
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func (p *producer) Close() {
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_ = p.connect.Close()
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}
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