Azure ServiceBus：找不到“com.microsoft.azure.servicebus.ITopicClient”

Posted 2023-02-26

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【中文标题】Azure ServiceBus：找不到“com.microsoft.azure.servicebus.ITopicClient”【英文标题】：Azure ServiceBus: 'com.microsoft.azure.servicebus.ITopicClient' that could not be found 【发布时间】：2021-05-20 09:21:14 【问题描述】：

我在尝试运行应用程序时遇到以下问题

2021-02-17T18:16:38.159+05:30 [APP/PROC/WEB/0] [OUT] 参数 0 的 com.example.demo.service.ServiceBusProducer 中的构造函数需要一个 'com.microsoft.azure.servicebus.ITopicClient' 类型的 bean 可以找不到。 2021-02-17T18:16:38.159+05:30 [APP/PROC/WEB/0] [OUT] 注入点有以下注解：

2021-02-17T18:16:38.159+05:30 [APP/PROC/WEB/0] [OUT] - @org.springframework.beans.factory.annotation.Autowired(required=true)

2021-02-17T18:16:38.159+05:30 [APP/PROC/WEB/0] [OUT] 行动：

2021-02-17T18:16:38.159+05:30 [APP/PROC/WEB/0] [OUT] 考虑定义在你的“com.microsoft.azure.servicebus.ITopicClient”类型的 bean 配置。

我定义了如下突出显示的依赖项

<dependency>
    <groupId>com.microsoft.azure</groupId>
    <artifactId>azure-servicebus-spring-boot-starter</artifactId>
    <version>2.2.4</version>
</dependency>

下面是ServiceBusProducer.java类

package com.example.demo.service;

import com.microsoft.azure.servicebus.ITopicClient;
import com.microsoft.azure.servicebus.Message;
import lombok.extern.log4j.Log4j2;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.beans.factory.annotation.Autowired;

import java.time.Instant;

@Log4j2
@Component
@Service
public class ServiceBusProducer implements Ordered 

    @Autowired
    private ITopicClient iTopicClient;

    ServiceBusProducer(ITopicClient iTopicClient) 
        this.iTopicClient = iTopicClient;
    

    @EventListener(ApplicationReadyEvent.class)
    public void produce() throws Exception 
        this.iTopicClient.send(new Message("Hello @ " + Instant.now().toString()));
    

    @Override
    public int getOrder() 
        return Ordered.LOWEST_PRECEDENCE;

我该如何解决这个问题？ com.example.demo.service.ServiceBusProducer 需要一个“com.microsoft.azure.servicebus.ITopicClient”类型的 bean，但无法找到。

更新了代码，但仍然面临同样的问题

package com.example.demo.service;

import com.microsoft.azure.servicebus.ITopicClient;
import com.microsoft.azure.servicebus.Message;
import lombok.extern.log4j.Log4j2;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.beans.factory.annotation.Autowired;

import javax.annotation.PostConstruct;
import java.time.Instant;

@Log4j2
@Component
@Service
public class ServiceBusProducer implements Ordered 

   @Autowired
    private ITopicClient iTopicClient;

   ServiceBusProducer(ITopicClient iTopicClient) 
      this.iTopicClient = iTopicClient;
   

   @PostConstruct
   private void postConstruct() 
      this.iTopicClient = iTopicClient;
   

   @EventListener(ApplicationReadyEvent.class)
   public void produce() throws Exception 
      this.iTopicClient.send(new Message("Hello @ " + Instant.now().toString()));
   

   @Override
   public int getOrder() 
      return Ordered.LOWEST_PRECEDENCE;

【问题讨论】：

【参考方案1】：

由于您没有提供公共默认构造函数并且您添加了自己的非默认构造函数，因此实例化失败。