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首页 > 解决方案 > 当 FeignClient 实例连接到任何注释 @Configuration 的配置类时，Spring 集成 http 入站网关不起作用

spring - 当 FeignClient 实例连接到任何注释 @Configuration 的配置类时，Spring 集成 http 入站网关不起作用

问题描述

它是由 SpringBoot 构建的 Spring Cloud 微服务 Web 应用。我们使用的是 Kafka 0.10.1，根据兼容性矩阵，这个 pom.xml 文件描述了依赖关系：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yonyou.occ</groupId>
    <artifactId>davcointegration</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>myintegration</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Edgware.SR2</spring-cloud.version>
        <oracle.version>11.1.0.7.0</oracle.version>
        <iuap.modules.version>3.1.0-RELEASE</iuap.modules.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-integration</artifactId>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-core</artifactId>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-kafka</artifactId>
            <version>2.1.2.RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-http</artifactId>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.java-json-tools</groupId>
            <artifactId>json-schema-validator</artifactId>
            <version>2.2.10</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-stream-kafka</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>1.5.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>jettison</artifactId>
                    <groupId>org.codehaus.jettison</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>antlr-runtime</artifactId>
                    <groupId>org.antlr</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>${oracle.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.18</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.10.RELEASE</version>
                <scope>import</scope>
                <type>pom</type>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

代码有效：

                .from(Http.inboundGateway("goods/{operation}")
                        .requestMapping(m -> m.methods(HttpMethod.POST))
                        .requestPayloadType(String.class)
                        .headerExpression(MessageHeaderName.OPERATION, "#pathVariables.operation"))
//......

当 @EnableFeignClients 添加到 Spring Boot 应用程序条目时，它仍然有效。但是一旦@FeignClient 实例（通过@Autowired）连接到任何配置类（@Configuration），它就不起作用了。我检查了http://myproject/mappings（Spring boot 提供的请求映射信息），映射“/goods/**”消失了。

这是一个解释这个问题的简单项目： https ://github.com/Princelo/demoForSiAndFeignProblem/blob/master/src/main/java/com/example/demo/config/AnyConfig.java

标签： springspring-integrationspring-cloudfeign

解决方案

请参阅https://github.com/spring-projects/spring-integration/issues/2752了解更多信息并跟踪修复。

同时，作为一种解决方法，我建议@Lazy在您尝试注入 Feign 客户端接口时使用。

为每个 Feign 客户创建FeignClientFactoryBean一个新孩子并为他们调用一个新孩子的问题太早了。不检查事件的上下文并标记自己以错误的方式初始化，错过了对适当 HTTP 组件的扫描。ApplicationContextContextRefreshedEventIntegrationRequestMappingHandlerMapping

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