Spring Integration Pub子项目示例项目“无法自动布线。找不到'PubSubTemplate‘类型的bean。”

Question

我正在检查一些Spring Integration with GCP pub sub，并且我已经克隆了他们的示例项目。我在IDE中收到一个警告/错误，我正在努力理解它。

基本上在这个类https://github.com/spring-cloud/spring-cloud-gcp/blob/6c95a16f7e6ad95404b4f992b5f46340e831e5cb/spring-cloud-gcp-samples/spring-cloud-gcp-integration-pubsub-json-sample/src/main/java/com/example/WebController.java#L47中

package com.example;

import java.util.ArrayList;
import java.util.List;

import com.example.SenderConfiguration.PubSubPersonGateway;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.view.RedirectView;

/**
 * Provides REST endpoint allowing you to send JSON payloads to a sample Pub/Sub topic for
 * demo.
 *
 * @author Daniel Zou
 */
@RestController
public class WebController {

    private final PubSubPersonGateway pubSubPersonGateway;

    @Autowired
    @Qualifier("ProcessedPersonsList")
    private ArrayList<Person> processedPersonsList;

    public WebController(PubSubPersonGateway pubSubPersonGateway, SenderConfiguration.PubSubProjectGateway pubSubProjectGateway ) {
        this.pubSubPersonGateway = pubSubPersonGateway;
    }

    @PostMapping("/createPerson")
    public RedirectView createUser(@RequestParam("name") String name, @RequestParam("age") int age) {
        Person person = new Person(name, age);
        this.pubSubPersonGateway.sendPersonToPubSub(person);
        return new RedirectView("/");
    }

    @GetMapping("/listPersons")
    public List<Person> listPersons() {
        return this.processedPersonsList;
    }
}

我有以下错误

Could not autowire. No beans of 'PubSubPersonGateway' type found. 

谁能解释一下为什么我会收到这个错误/警告，以及这是不是我需要关注的问题？仅供参考，项目将正确编译和运行

Answer 1

这只是一个IDE检查问题，仅此而已。该PubSubPersonGateway是一个特殊的@MessagingGateway bean，它不被集成开发环境所理解。也许更好的做法是针对该IDE提出改进建议，让他们知道Spring Integration检查应该得到改进。