Java函数的生态系统和社区支持情况如何？安全性和稳定性考量

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.lambda.runtime.events.APIGatewayV2HTTPEvent;
import com.amazonaws.services.lambda.runtime.events.APIGatewayV2HTTPResponse;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.GetItemRequest;
import com.amazonaws.services.dynamodbv2.model.GetItemResult;
import com.amazonaws.services.dynamodbv2.model.Key;
import java.util.HashMap;
import java.util.Map;

public class GetUserHandler
        implements RequestHandler<APIGatewayV2HTTPEvent, APIGatewayV2HTTPResponse> {

    private AmazonDynamoDBClient dynamoDB = new AmazonDynamoDBClient();

    @Override
    public APIGatewayV2HTTPResponse handleRequest(APIGatewayV2HTTPEvent request, Context context) {
        // 从请求中获取用户 ID
        String userId = request.getPathParameters().get("id");

        // 创建 DynamoDB 获取请求
        GetItemRequest getItemRequest = new GetItemRequest()
                .withTableName("users")
                .withKey(new Key().withHashKey(userId));

        // 从 DynamoDB 获取用户详细信息
        GetItemResult getItemResult = dynamoDB.getItem(getItemRequest);

        // 创建 HTTP 响应
        APIGatewayV2HTTPResponse response = new APIGatewayV2HTTPResponse();
        response.setStatusCode(200);
        response.setBody(getItemResult.getItem().toJSON());

        return response;
    }
}