maven - 找不到类 AWS lambda 异常

Question

我创建了一个将 hello world 打印到控制台的 aws Lambda 函数

使用类所在的包名称和要调用的方法名称配置 lambda，并将 jar 文件上传到 aws lambda 函数。

当我执行 lambda 时，我得到一个异常，提示找不到类。

消息为

{
  "errorMessage": "Class not found: com.coreservice.lambda.Handler",
  "errorType": "class java.lang.ClassNotFoundException"
}

无法理解为什么 aws 无法在 jar 中找到类。

下面是项目配置的详细信息

public class Handler implements RequestHandler<SNSEvent, Object> {
    
       @Override
        public Object handleRequest(final SNSEvent input, final Context context) {
                if (Objects.nonNull(input) && !CollectionUtils.isNullOrEmpty(input.getRecords())) {
                    context.getLogger().log("Hello World");
                    context.getLogger().log("queue = "+ SQS_URL);
                }
                return StringUtils.EMPTY;
            }
}

项目pom:

<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>
    <groupId>com.coreservice</groupId>
    <artifactId>SNS-SQS-Filter-Lambda</artifactId>
    <packaging>jar</packaging>
    <version>136.0.0-SNAPSHOT</version>
    <name>SNS-SQS-Filter-Lambda</name>
    <dependencies>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-core</artifactId>
            <version>1.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-events</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.14</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.3</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source> <!-- or 1.8 -->
                    <target>1.8</target> <!-- or 1.8 -->
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <createDependencyReducedPom>false</createDependencyReducedPom>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

从以下位置更改 Handler 的 lambda 配置:

com.coreservice.lambda.Handler.handleRequest

到

com.coreservice.lambda.Handler

com.coreservice.lambda.Handler 类必须实现 com.amazonaws.services.lambda.runtime.RequestHandler 接口(interface)。