ALIYUN::MNS::Subscription is used to subscribe an endpoint to an Alibaba Cloud Message Service (MNS) topic. For a subscription to be created, the owner of the endpoint must confirm the subscription.

Syntax

{
  "Type": "ALIYUN::MNS::Subscription",
  "Properties": {
    "Endpoint": String,
    "NotifyStrategy": String,
    "FilterTag": String,
    "NotifyContentFormat": String,
    "SubscriptionName": String,
    "TopicName": String
  }
}

Properties

Property Type Required Editable Description Constraint
TopicName String Yes No The name of the topic.

The topic name must be unique within an Alibaba Cloud account in a region.

The name can be up to 256 characters in length and can contain letters, digits, and hyphens (-). It must start with a letter.

SubscriptionName String Yes No The name of the subscription. The name can be up to 256 characters in length and can contain letters, digits, and hyphens (-). It must start with a letter.
Endpoint String Yes No The endpoint that the subscriber uses to receive messages. Valid values:
  • HttpEndpoint: This type of endpoints must be prefixed with http://.
  • QueueEndpoint: This type of endpoints must be in the acs:mns:{REGION}:{AccountID}:queues/{QueueName} format.
  • MailEndpoint: This type of endpoints must be in the mail:directmail:{MailAddress} format.
  • SmsEndpoint: This type of endpoints must be in the sms:directsms:anonymous or sms:directsms:{Phone} format.
FilterTag String No No The message filtering tag in the subscription. The parameter value can be up to 16 characters in length. By default, no messages are filtered.
Note Only messages that have consistent tags are pushed.
NotifyStrategy String No Yes The retry policy that is applied when an error occurs when message is delivered to the endpoint. Default value: BACKOFF_RETRY. Valid values:
  • BACKOFF_RETRY
  • EXPONENTIAL_DECAY_RETRY
NotifyContentFormat String No No The format of the message content pushed to the endpoint. Default value: XML. Valid values:
  • XML
  • JSON
  • SIMPLIFIED

Response parameters

Fn::GetAtt

  • SubscriptionUrl: the URL of the created subscription.
  • SubscriptionName: the name of the subscription.
  • TopicName: the name of the topic.

Examples

JSON format 

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Parameters": {
    "Endpoint": {
      "Type": "String",
      "Description": "Terminal address of the message recipient for the created subscription.\nCurrently, four types of endpoints are supported: \n1. HttpEndpoint, which must be prefixed with \"http://\"; \n2. QueueEndpoint, in the format of acs:mns:{REGION}:{AccountID}:queues/{QueueName}; \n3. MailEndpoint, in the format of mail:directmail:{MailAddress}; \n4. SmsEndpoint, in the format of sms:directsms:anonymous or sms:directsms:{Phone}."
    },
    "NotifyStrategy": {
      "Type": "String",
      "Description": "Retry policy that will be applied when an error occurs during message push to the endpoint.\nBACKOFF_RETRY or EXPONENTIAL_DECAY_RETRY; default value: BACKOFF_RETRY. For details about retry policies, refer to Basic Concepts/NotifyStrategy.",
      "AllowedValues": [
        "BACKOFF_RETRY",
        "EXPONENTIAL_DECAY_RETRY"
      ],
      "Default": "BACKOFF_RETRY"
    },
    "NotifyContentFormat": {
      "Type": "String",
      "Description": "Format of the message content pushed to the endpoint.\nXML, JSON, or SIMPLIFIED; default value: XML. For details about message formats, refer to Basic Concepts/NotifyContentFormat.",
      "AllowedValues": [
        "XML",
        "JSON",
        "SIMPLIFIED"
      ],
      "Default": "XML"
    },
    "FilterTag": {
      "Type": "String",
      "Description": "Message filter tag in the created subscription (Only messages with consistent tags are pushed.)\nThe value is a string of no more than 16 characters. The default value is no message filter.",
      "MaxLength": 16
    },
    "SubscriptionName": {
      "Type": "String",
      "Description": "Subscription name",
      "MinLength": 1,
      "MaxLength": 256
    },
    "TopicName": {
      "Type": "String",
      "Description": "Topic name",
      "MinLength": 1,
      "MaxLength": 256
    }
  },
  "Resources": {
    "Subscription": {
      "Type": "ALIYUN::MNS::Subscription",
      "Properties": {
        "Endpoint": {
          "Ref": "Endpoint"
        },
        "NotifyStrategy": {
          "Ref": "NotifyStrategy"
        },
        "NotifyContentFormat": {
          "Ref": "NotifyContentFormat"
        },
        "FilterTag": {
          "Ref": "FilterTag"
        },
        "SubscriptionName": {
          "Ref": "SubscriptionName"
        },
        "TopicName": {
          "Ref": "TopicName"
        }
      }
    }
  },
  "Outputs": {
    "SubscriptionUrl": {
      "Description": "URL of created subscription",
      "Value": {
        "Fn::GetAtt": [
          "Subscription",
          "SubscriptionUrl"
        ]
      }
    },
    "SubscriptionName": {
      "Description": "Subscription name",
      "Value": {
        "Fn::GetAtt": [
          "Subscription",
          "SubscriptionName"
        ]
      }
    },
    "TopicName": {
      "Description": "Topic name",
      "Value": {
        "Fn::GetAtt": [
          "Subscription",
          "TopicName"
        ]
      }
    }
  }
}

YAML format 

ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  Endpoint:
    Description: "Terminal address of the message recipient for the created subscription.\n\
      Currently, four types of endpoints are supported: \n1. HttpEndpoint, which must\
      \ be prefixed with \"http://\"; \n2. QueueEndpoint, in the format of acs:mns:{REGION}:{AccountID}:queues/{QueueName};\
      \ \n3. MailEndpoint, in the format of mail:directmail:{MailAddress}; \n4. SmsEndpoint,\
      \ in the format of sms:directsms:anonymous or sms:directsms:{Phone}."
    Type: String
  FilterTag:
    Description: 'Message filter tag in the created subscription (Only messages with
      consistent tags are pushed.)

      The value is a string of no more than 16 characters. The default value is no
      message filter.'
    MaxLength: 16
    Type: String
  NotifyContentFormat:
    AllowedValues:
    - XML
    - JSON
    - SIMPLIFIED
    Default: XML
    Description: 'Format of the message content pushed to the endpoint.

      XML, JSON, or SIMPLIFIED; default value: XML. For details about message formats,
      refer to Basic Concepts/NotifyContentFormat.'
    Type: String
  NotifyStrategy:
    AllowedValues:
    - BACKOFF_RETRY
    - EXPONENTIAL_DECAY_RETRY
    Default: BACKOFF_RETRY
    Description: 'Retry policy that will be applied when an error occurs during message
      push to the endpoint.

      BACKOFF_RETRY or EXPONENTIAL_DECAY_RETRY; default value: BACKOFF_RETRY. For
      details about retry policies, refer to Basic Concepts/NotifyStrategy.'
    Type: String
  SubscriptionName:
    Description: Subscription name
    MaxLength: 256
    MinLength: 1
    Type: String
  TopicName:
    Description: Topic name
    MaxLength: 256
    MinLength: 1
    Type: String
Resources:
  Subscription:
    Properties:
      Endpoint:
        Ref: Endpoint
      FilterTag:
        Ref: FilterTag
      NotifyContentFormat:
        Ref: NotifyContentFormat
      NotifyStrategy:
        Ref: NotifyStrategy
      SubscriptionName:
        Ref: SubscriptionName
      TopicName:
        Ref: TopicName
    Type: ALIYUN::MNS::Subscription
Outputs:
  SubscriptionName:
    Description: Subscription name
    Value:
      Fn::GetAtt:
      - Subscription
      - SubscriptionName
  SubscriptionUrl:
    Description: URL of created subscription
    Value:
      Fn::GetAtt:
      - Subscription
      - SubscriptionUrl
  TopicName:
    Description: Topic name
    Value:
      Fn::GetAtt:
      - Subscription
      - TopicName

For more examples, visit Subscription.json and Subscription.yml. In the examples, the ALIYUN::MNS::Topic, ALIYUN::MNS::Queue, and ALIYUN::MNS::Subscription resource types are involved.