我有一个cloudformation模板，可以创建Table以及Stream的EventSourceMapping . 我正在使用表创建条件，但它抱怨EventSourceMapping的依赖，因为我的EventSourceMapping依赖于表创建 . 我想要一些如何管理依赖项的建议 . 这是我的示例代码：
参数：TableName：说明：DynamoDb的名称表类型：字符串
条件：TableCreationCondition：！Equals [！Ref TableName，“”]
资源：
DynamoDBTable:
#Condition: TableCreationCondition
Type: "AWS::DynamoDB::Table"
DeletionPolicy: Retain
Properties:
AttributeDefinitions:
- AttributeName: !Ref HashKeyElementName
AttributeType: !Ref HashKeyElementType
KeySchema:
- AttributeName: !Ref HashKeyElementName
KeyType: HASH
TableName: !Ref TableName
StreamSpecification:
StreamViewType: NEW_AND_OLD_IMAGES
ProvisionedThroughput:
ReadCapacityUnits: !Ref ReadCapacityUnits
WriteCapacityUnits: !Ref WriteCapacityUnits
SSESpecification:
SSEEnabled: true
DynamoDBTableStream:
Type: AWS::Lambda::EventSourceMapping
Properties:
BatchSize: 1 #trigger one lambda per document
Enabled: True
EventSourceArn:
Fn::GetAtt:
- DynamoDBTable
- StreamArn
FunctionName:
Fn::GetAtt:
- MyLambdaFunction
- Arn
StartingPosition: LATEST
1 回答
您可以在DynamoDB表上设置此属性：