AWS Stepfunction, ValidationException

Question

我在使用 stepfunction 从 AWS dynamoDB 获取数据时收到错误“提供的关键元素与架构不匹配”。

阶跃函数定义

{
  "Comment": "This is your state machine",
  "StartAt": "Choice",
  "States": {
    "Choice": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.data.Type",
          "StringEquals": "GET",
          "Next": "DynamoDB GetItem"
        },
        {
          "Variable": "$.data.Type",
          "StringEquals": "PUT",
          "Next": "DynamoDB PutItem"
        }
      ]
    },
    "DynamoDB GetItem": {
      "Type": "Task",
      "Resource": "arn:aws:states:::dynamodb:getItem",
      "Parameters": {
        "TableName": "KeshavDev",
        "Key": {
          "Email": {
            "S": "$.Email"
          }
        }
      },
      "End": true
    },
    "DynamoDB PutItem": {
      "Type": "Task",
      "Resource": "arn:aws:states:::dynamodb:putItem",
      "Parameters": {
        "TableName": "KeshavDev",
        "Item": {
          "City": {
            "S.$": "$.City"
          },
          "Email": {
            "S.$": "$.Email"
          },
          "Address": {
            "S.$": "$.Address"
          }
        }
      },
      "InputPath": "$.data",
      "End": true
    }
  }
}

输入

{
  "data": {
    "Type": "GET",
     "Email": "demo@gmail.com"
  }
}

错误

<块引用>

{ "resourceType": "dynamodb", "resource": "getItem", "error": "DynamoDB.AmazonDynamoDBException", "cause": "提供的密钥 元素与架构不匹配（服务：AmazonDynamoDBv2；状态 代码：400；错误代码：验证异常；请求 ID： a78c3d7a-ca3f-4483-b986-1735201d4ef2；代理：空)" }

Answer 1

与 AWS documentation 相比，我发现 S.$ 任务存在一些潜在问题。

• 我认为 putItem 字段需要 ResultPath 类似于您在 $.data.Email 任务中的内容。
• 没有 "DynamoDB GetItem": { "Type": "Task", "Resource": "arn:aws:states:::dynamodb:getItem", "Parameters": { "TableName": "KeshavDev", "Key": { "Email": { "S.$": "$.data.Email" } } }, "ResultPath": "$.DynamoDB", "End": true }, 属性告诉状态机将结果放在哪里。
• 您的路径可能不正确，请尝试java.lang.IllegalStateException: Could not find the HAPI-FHIR structure JAR on the classpath for version R4. Note that as of HAPI-FHIR v0.8, a separate FHIR strcture JAR must be added to your classpath (or project pom.xml if you are using Maven) at ca.uhn.fhir.context.FhirContext.<init>(Unknown Source:114) at ca.uhn.fhir.context.FhirContext.<init>(Unknown Source:1) at ca.uhn.fhir.context.FhirContext.forR4(Unknown Source:4) at e.f.a.m0.a.a.a(:12) at androidx.lifecycle.LiveData.b(Unknown Source:29) at androidx.lifecycle.LiveData.c(Unknown Source:44) at b.s.q.h(:1) at e.p.a.c$c.b(:2) at m.b.run(:1) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7562) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

nodes = {1: {'pos': (1, 2), 'other_data': 'N/A'},
         2: {'pos': (2, 2), 'other_data': 'N/A'},
         3: {'pos': (4, 3), 'other_data': 'N/A'},
         4: {'pos': (5, 3), 'other_data': 'N/A'},
         5: {'pos': (6, 3), 'other_data': 'N/A'},
         6: {'pos': (1, 4), 'other_data': 'N/A'},
         7: {'pos': (2, 4), 'other_data': 'N/A'},
         8: {'pos': (4, 5), 'other_data': 'N/A'},
         9: {'pos': (5, 5), 'other_data': 'N/A'},
         10: {'pos': (6, 5), 'other_data': 'N/A'}}

老实说，我不确定所有这些中的一个是否会导致验证错误，这些是一些需要试验的东西。

另外，Amazon State Language 有一些开源的 validators，但在这种情况下，它们不是很有帮助，并且表示您的代码是有效的。

Answer 2

它的工作，通过在步骤函数定义中添加两个键。 DynamoDb 有两个键。

1. 主分区键
2. 主排序键