在无服务器Java函数中获取AWS Cognito用户ID

我正在学习教程，它使用无服务器框架创建一个API，将对象插入DynamoDB表，并将它们与经过身份验证的AWS Cognito用户关联。我试图将Node.js代码转换为Java，但在获取Cognito标识时遇到了一个问题，如图所示

我希望以下几行Java代码是等效的：

final CognitoIdentity identity = context.getIdentity();
final String userId = identity.getIdentityId();

但是

userId

为空

我正在使用aws api gateway cli test实用程序调用带有Cognito用户凭据的api，如图所示。身份验证通过，但处理程序中的

userId

为空

这是我的职责：

package com.mealplanner.function;

import java.util.Map;

import com.amazonaws.services.lambda.runtime.CognitoIdentity;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mealplanner.dal.MealRepository;
import com.mealplanner.domain.Meal;
import com.serverless.ApiGatewayResponse;

public class CreateMealHandler implements RequestHandler<Map<String, Object>, ApiGatewayResponse> {

    @Override
    public ApiGatewayResponse handleRequest(final Map<String, Object> request, final Context context) {
        try {
            final CognitoIdentity identity = context.getIdentity();    
            final String userId = identity.getIdentityId();

            final JsonNode body = new ObjectMapper().readTree((String) request.get("body"));
            final MealRepository repository = new MealRepository();
            final Meal meal = new Meal();
            meal.setUserId(userId);
            meal.setDescription(body.get("description").asText());
            repository.save(meal);

            return ApiGatewayResponse.builder()
                    .setStatusCode(200)
                    .setObjectBody(meal)
                    .build();
        } catch (final Exception e) {
            final String errorText = String.format("Error saving meal with request [%s]", request);
            LOGGER.error(errorText, e);
            return ApiGatewayResponse.builder()
                    .setStatusCode(500)
                    .setObjectBody(errorText)
                    .build();
        }
    }
}

我是否缺少一些配置，或者没有正确翻译Node.js代码

---

如果我遗漏了任何相关信息，请在此处提供完整代码：。我将使用缺少的任何内容更新此问题，以确保所有相关信息都是独立的。

结果表明我没有正确翻译Node.js代码。要访问

CognitoIdentityId

我必须从

request

对象获取

requestContext

，然后获取

identity

对象，如下所示：

public ApiGatewayResponse handleRequest(final Map<String, Object> request, final Context context) {
    final Map<String, Object> requestContext = (Map<String, Object>) request.get("requestContext");
    final Map<String, Object> identity = (Map<String, Object>) requestContext.get("identity");
    final String userId = (String) identity.get("cognitoIdentityId");

    // etc
}

public-ApiGatewayResponse-handleRequest（最终映射请求、最终上下文）{
final-Map-requestContext=（Map）request.get（“requestContext”）；
最终映射标识=（Map）requestContext.get（“标识”）；
最终字符串userId=（String）identity.get（“cognitoIdentityId”）；
//等
}

createMeal:
    handler: com.mealplanner.function.CreateMealHandler
    events:
      - http:
          path: /meals
          method: post
          cors: true
          authorizer: aws_iam

public ApiGatewayResponse handleRequest(final Map<String, Object> request, final Context context) {
    final Map<String, Object> requestContext = (Map<String, Object>) request.get("requestContext");
    final Map<String, Object> identity = (Map<String, Object>) requestContext.get("identity");
    final String userId = (String) identity.get("cognitoIdentityId");

    // etc
}