AWS Step Functions
开发人员指南
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使用 Step Functions 调用 Amazon SNS

Step Functions can control certain AWS services directly from the Amazon 状态语言. For more information, see:

支持的 API:

注意

There is a limit on the maximum input or result data size for a task in Step Functions. This limits you to 32,768 characters of data when you send to, or receive data from, another service. See 与状态机执行相关的限制.

下面是发布 Amazon SNS 主题的 Task 状态。

{ "StartAt": "Publish to SNS", "States": { "Publish to SNS": { "Type": "Task", "Resource": "arn:aws-cn:states:::sns:publish", "Parameters": { "TopicArn": "arn:aws-cn: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 } } }

下面包含一个发布 Amazon SNS 主题,然后等待返回任务令牌的 Task 状态。请参阅 等待具有任务令牌的回调

{ "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 集成服务的 IAM 策略.