Call Amazon SNS with Step Functions - AWS Step Functions

Call Amazon SNS with Step Functions

Step Functions can control certain AWS services directly from the Amazon States Language. For more information, see the following:

Supported Amazon SNS APIs:

Note

There is a quota for the maximum input or result data size for a task in Step Functions. This restricts you to 32,768 characters of data when you send to, or receive data from, another service. See Quotas Related to State Machine Executions.

The following includes a Task state that publishes to an Amazon Simple Notification Service (Amazon SNS) topic. 

{
 "StartAt": "Publish to SNS",
 "States": {
   "Publish to SNS": {
     "Type": "Task",
     "Resource": "arn:aws:states:::sns:publish",
     "Parameters": {
       "TopicArn": "arn:aws:sns:us-east-1:123456789012:myTopic",
       "Message.$": "$.input.message",
       "MessageAttributes": {
         "my attribute no 1": {
           "DataType": "String",
           "StringValue": "value of my attribute no 1"
         },
         "my attribute no 2": {
           "DataType": "String",
           "StringValue": "value of my attribute no 2"
         }
       }
     },
     "End": true
    }
  }
}

The following includes a Task state that publishes to an Amazon SNS topic, and then waits for the task token to be returned. See Wait for a Callback with the Task Token. 

{  
   "StartAt":"Send message to SNS",
   "States":{  
      "Send message to SNS":{  
         "Type":"Task",
         "Resource":"arn:aws:states:::sns:publish.waitForTaskToken",
         "Parameters":{  
            "TopicArn":"arn:aws:sns:us-east-1:123456789012:myTopic",
            "Message":{  
               "Input.$":"$",
               "TaskToken.$":"$$.Task.Token"
            }
         },
         "End":true
      }
   }
}

For information on how to configure IAM when using Step Functions with other AWS services, see IAM Policies for Integrated Services.