AWS Lambda 函数抛出 ClassNotFoundException - LambdaHandler。 当前类路径：file:/var/task/

Question

我在 APIGetway 顶部作为 Lambda 部署的 Spring Boot 应用程序 - 出现错误

 Class not found: com.myapp.app.LambdaHandler: java.lang.ClassNotFoundException
java.lang.ClassNotFoundException: com.myapp.app.LambdaHandler. Current classpath: file:/var/task/

创建 Jar 文件时，我看到有 3 个文件夹 - BOOT-INF、META-INF、org。

我的包在 BOOT_INF -> classes -> com -> myapp -> app -> LambdaHandler 里面

部署使用 - serverless.yml

从命令提示符 CLI 部署 - 无服务器部署

StreamLambdaHandler.java

public class StreamLambdaHandler implements RequestStreamHandler {  
  private static SpringBootLambdaContainerHandler<AwsProxyRequest, AwsProxyResponse> handler; 
    static {
        try {
            handler = SpringBootLambdaContainerHandler.getAwsProxyHandler(Application.class);
        } catch (Exception e) {
            // if we fail here. We re-throw the exception to force another cold start
            e.printStackTrace();
            throw new RuntimeException("Could not initialize Spring Boot Application", e);
        }
    }

    @Override
    public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context)
            throws IOException {
        handler.proxyStream(inputStream, outputStream, context);
    } 
}

应用.java

@SpringBootApplication
@Configuration
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer {
    /**
     * Create required HandlerMapping, to avoid several default HandlerMapping instances being created
     */
    @Bean
    public HandlerMapping handlerMapping() {
        return new RequestMappingHandlerMapping();
    }

    /**
     * Create required HandlerAdapter, to avoid several default HandlerAdapter instances being created
     */
    @Bean
    public HandlerAdapter handlerAdapter() {
        return new RequestMappingHandlerAdapter();
    }
    
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

我的控制器 -

@RestController
@EnableWebMvc
@Profile("lambda")
@RequestMapping("/app/v2")
public class ClientInformation {
    @Value("${clientDetails.userName}")
    private String userName;
    
    @Value("${clientDetails.userId}")
    private int userId;
    
    @Value("${clientDetails.userAddress}")
    private String userAddress;
    
    @GetMapping("/")
    public Map<String, Object> getDetails()  {  
        Map<String, Object> rtn = new HashMap<>();
        rtn.put("message", "App is working fine !!!");
        return rtn;
    }
    
    @GetMapping("/information")
    public Map<String, Object> getInformation()  {  
        Map<String, Object> rtn = new HashMap<>();
        rtn.put("name", userName);
        rtn.put("id", userId);
        return rtn;
    }
    
    @GetMapping("/ping")
    public Map<String, Object> getD() {
        Map<String, Object> rtn = new HashMap<>();
        rtn.put("name", "Ping is happening !!!");
        rtn.put("status", "200");
        return rtn;
    }
}

无服务器.yml -

service: myapplication-api
provider:
  name: aws
  runtime: java11
  memorySize: 512
  timeout: 15
 profile: default
  stage: production
package:
  artifact: target/myapp-api-0.0.1-SNAPSHOT-exec.jar

functions:
  catchAllAny:
    handler: index.catchAllAny
    events:
      - httpApi: '*'
  catchAllMethod:
    handler: handler.catchAllMethod
    events:
      - httpApi:
          method: '*'
          path: /any/method

pom.xml

我可以知道我做错了什么吗？ -

 <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 https://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>2.1.1.RELEASE</version> <relativePath /> <.-- lookup parent from repository --> </parent> <groupId>com.myapp.app</groupId> <artifactId>myapp-api</artifactId> <version>0.0.1-SNAPSHOT</version> <name>myapp-api</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <.-- <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-java-sdk</artifactId> <version>1.11.931</version> </dependency> --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <.-- Spring boot lambda Serverless --> <dependency> <groupId>com.amazonaws.serverless</groupId> <artifactId>aws-serverless-java-container-spring</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-lambda-java-events</artifactId> <version>1.3.0</version> </dependency> <dependency> <groupId>com.amazonaws.serverless</groupId> <artifactId>aws-serverless-java-container-springboot2</artifactId> <version>1.5.2</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>net.authorize</groupId> <artifactId>anet-java-sdk</artifactId> <version>2.0.6</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.9.1</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.9.2</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.9.2</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-bean-validators</artifactId> <version>2.9.2</version> </dependency> <dependency> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>3.0.0</version> </dependency> <dependency> <groupId>org.hibernate.validator</groupId> <artifactId>hibernate-validator</artifactId> </dependency> <dependency> <groupId>net.logstash.logback</groupId> <artifactId>logstash-logback-encoder</artifactId> <version>5.2</version> </dependency> <dependency> <groupId>org.glassfish.jaxb</groupId> <artifactId>jaxb-runtime</artifactId> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.7</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.15</version> </dependency> <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-java-sdk-s3</artifactId> <version>1.12.226</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.15</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <classifier>exec</classifier> <executable>false</executable> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>

Answer 1

您需要配置您的 serverless.yml 以指定 StreamLambdaHandler 的完整包作为处理程序属性。

例如，如果该类位于 com.myapp 包中。 您需要指定 com.myapp.StreamLambdaHandler

您当前正在指定 com.myapp.app.LambdaHandler ，这是一个不存在的类。

Answer 2

在 Springboot 中，我们拥有所有的 @Controller、@Service、注解。 所以兰巴不够聪明，无法理解这一点。 除非我们做一些黑客攻击。 但亚马逊网络服务不建议这样做。 我们能做的——

我们可以利用 Spring Cloud 功能。 链接在这里 -

• https://www.baeldung.com/spring-cloud-function

• https://spring.io/projects/spring-cloud-function

• https://github.com/spring-cloud/spring-cloud-function/tree/main/spring-cloud-function-samples/function-sample-aws

如果您喜欢此信息，请竖起大拇指。

Answer 3

在pom.xml文件中添加以下内容：

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-deploy-plugin</artifactId>
            <configuration>
                <skip>true</skip>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot.experimental</groupId>
                    <artifactId>spring-boot-thin-layout</artifactId>
                    <version>1.0.28.RELEASE</version>  // You may need to update this version according to your Java & Spring Boot version
                </dependency>
            </dependencies>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <configuration>
                <createDependencyReducedPom>false</createDependencyReducedPom>
                <shadedArtifactAttached>true</shadedArtifactAttached>
                <shadedClassifierName>aws</shadedClassifierName>
            </configuration>
        </plugin>
    </plugins>
</build>