ALIYUN::DATAHUB::Topic - Resource Orchestration Service - Alibaba Cloud Documentation Center

ALIYUN::DATAHUB::Topic is used to create a topic.

Alibaba Cloud allows you to create topics in the following regions:

China (Hangzhou)
China (Shanghai)
China (Beijing)
China (Zhangjiakou)
China (Shenzhen)
Singapore (Singapore)
Malaysia (Kuala Lumpur)
Germany (Frankfurt)
India (Mumbai)

Syntax

{
  "Type": "ALIYUN::DATAHUB::Topic",
  "Properties": {
    "Comment": String,
    "RecordType": String,
    "ProjectName": String,
    "RecordSchema": String,
    "TopicName": String,
    "ShardCount": Integer,
    "Lifecycle": Integer
  }
}

Properties

Property	Type	Required	Editable	Description	Constraint
Comment	String	Yes	No	The description of the topic.	The description must be 3 to 1,024 characters in length.
RecordType	String	Yes	No	The type of the topic.	Valid values: TUPLE: structured data BLOB: unstructured data
ProjectName	String	Yes	No	The name of the project.	None.
RecordSchema	String	No	No	Details of the schema of the topic.	This property must be specified when you create a topic of the TUPLE type. This property cannot be specified when you create a topic of the BLOB type.
TopicName	String	Yes	No	The name of the topic.	The name must be 3 to 64 characters in length and can contain digits, letters, and underscores (_). The name is case-sensitive and must start with a letter.
ShardCount	Integer	No	No	The initial number of shards in the topic.	None.
Lifecycle	Integer	No	No	The time to live (TTL) period of data.	None.

Return values

Fn::GetAtt

ProjectName: the name of the project.
TopicName: the name of the topic.

Examples

YAML format

ROSTemplateFormatVersion: '2015-09-01'
Description: Test DataHub Topic
Parameters:
  RecordType:
    Type: String
    Default: BLOB
    AllowedValues:
      - TUPLE
      - BLOB
  ProjectName:
    Type: String
    Default: mytest
  TopicName:
    Type: String
    Default: mytest
Resources:
  Topic:
    Type: ALIYUN::DATAHUB::Topic
    Properties:
      Comment: Test Create Topic
      RecordType:
        Ref: RecordType
      ProjectName:
        Ref: ProjectName
      TopicName:
        Ref: TopicName
Outputs:
  ProjectName:
    Value:
      Fn::GetAtt:
        - Topic
        - ProjectName
  TopicName:
    Value:
      Fn::GetAtt:
        - Topic
        - TopicName

JSON format

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Description": "Test DataHub Topic",
  "Parameters": {
    "RecordType": {
      "Type": "String",
      "Default": "BLOB",
      "AllowedValues": [
        "TUPLE",
        "BLOB"
      ]
    },
    "ProjectName": {
      "Type": "String",
      "Default": "mytest"
    },
    "TopicName": {
      "Type": "String",
      "Default": "mytest"
    }
  },
  "Resources": {
    "Topic": {
      "Type": "ALIYUN::DATAHUB::Topic",
      "Properties": {
        "Comment": "Test Create Topic",
        "RecordType": {
          "Ref": "RecordType"
        },
        "ProjectName": {
          "Ref": "ProjectName"
        },
        "TopicName": {
          "Ref": "TopicName"
        }
      }
    }
  },
  "Outputs": {
    "ProjectName": {
      "Value": {
        "Fn::GetAtt": [
          "Topic",
          "ProjectName"
        ]
      }
    },
    "TopicName": {
      "Value": {
        "Fn::GetAtt": [
          "Topic",
          "TopicName"
        ]
      }
    }
  }
}