Confirm Subscription

In this article

Overview

You can use this Snap to confirm an endpoint subscription to a topic in Amazon SNS. It verifies an endpoint owner's intent to receive messages by validating the subscription token sent to the endpoint while subscribing to a topic. After you subscribe your endpoint, Amazon SNS will send a subscription confirmation message to the endpoint. Amazon SNS will not send messages to the endpoint until the subscription has been confirmed.

Prerequisites

Support for Ultra Pipelines

Limitations

None.

Known Issues

None.

Views

View Type

View Format

Number of Views

Examples of Upstream and Downstream Snaps

Description

View Type

View Format

Number of Views

Examples of Upstream and Downstream Snaps

Description

Input 

Document

  • Min: 0

  • Max: 1

  • Mapper

The topic Arn, region and subscription token of the topic.

Output

Document

  • Min: 0

  • Max: 1

  • Copy

The ARN of the subscription and the Subscription ID.

Error

Error handling is to have a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that might arise while running the Pipeline by choosing one of the options from the When errors occur section under the Views tab.

The options available are:

  • Stop Pipeline Execution: Stops the current pipeline execution when an error arises.

  • Discard Error Data and Continue: Ignores an error completely, discard that record, and continue with the rest of the records.

  • Route Error Data to Error View: Routes the data to an error view of the Snap and then decides what to do with the error.

See Error View in Pipeline in examples to understand the Snap error view settings and error output. For more information on the error view and handling error output in a Pipeline, see Error handling in Pipelines.

Snap Settings

  • Asterisk (*): Indicates a mandatory field.

  • Suggestion icon (): Indicates a list that is dynamically populated based on the configuration.

  • Expression icon (): Indicates whether the value is an expression (if enabled) or a static value (if disabled). Learn more about Using Expressions in SnapLogic.

  • Add icon (): Indicates that you can add fields in the field set.

  • Remove icon (): Indicates that you can remove fields from the field set.

Field Name

Field Type

Field Dependency

Description

Field Name

Field Type

Field Dependency

Description

Label*

Default Value: N/A
Example: Confirm Subscription

String

N/A

Specify the name of the Snap. You can modify this to be more specific, especially if you have more than one of the same Snap in your Pipeline.

Region


Default value: None
Example: us-east-1, us-west-1

String

N/A

Specify the AWS region where the application is implemented. This is a suggestible field and suggestions will be populated based on the Account settings. If you do not provide a value in this field, the Snap evaluates the region in the following sequence:
The Topic Arn or Subscription ARN > The region of the EC2 instance.

Topic Arn*

Default Value: N/A
Example: Topic 1

String

N/A

Specify the Amazon Resource Name of the topic. This is a suggestible field and suggestions will be populated based on the Account settings.

Subscription Token*

Default Value: N/A
Example: Subscription

String

N/A

Enter the valid subscription token sent to the endpoint while subscribing to a topic. 

 

Authentication Required on Unsubscription

Checkbox

N/A

Select this checkbox if you want the Snap to verify the authentication of the user before unsubscribing an endpoint subscription to a topic. If this field is set to true, only topic owner and subscription owner can unsubscribe the endpoint.

Snap Execution

 

 

Default value: Execute only
Example: Validate & Execute

Select one of the three modes in which the Snap executes. Available options are:

  • Validate & Execute: Performs limited execution of the Snap, and generates a data preview during Pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during Pipeline runtime.

  • Execute only: Performs full execution of the Snap during Pipeline execution without generating preview data.

  • Disabled: Disables the Snap and all Snaps that are downstream from it.

Troubleshooting

Error

Reason

Resolution

Error

Reason

Resolution

An error occurred while updating a topic with the given topic name in AWS SNS.

Valid information might be missing.

Check the input data, formats and try again.

Missing Topic ARN

 ARN must be provided.

The topic ARN must be provided.

Example

In the following example, to confirm the subscription, the Subscription Arn is read from the endpoint (Email) created. To complete this task:

  • The Email Reader Snap is used to reading the email

  • The email from the AWS SNS is filtered and the latest email is read by the Filter and Head Snaps.

  • Mapper Snap is used to parse the Subscription Arn received in the text to JSON.

  • The subscription is confirmed with the Subscription Arn.

 

The Create Topic Snap is configured with the following attributes and tag attributes. The Snap Settings and output view of the Snap are displayed as follows:

An endpoint is subscribed to a topic. Here we are using the email-JSON protocol and giving the email ID as an endpoint. The Snap Settings and output view of the Snap are displayed as follows:

The Email Reader Snap is used to read the email. The email from the AWS SNS is filtered and the latest email is read by the Filter and Head Snaps. The Snap Settings and output view of the Snap are displayed as follows:

The Mapper Snap is used to parse the Subscription Arn received in the text to JSON. The Snap Settings and output view of the Snap are displayed as follows:

The subscription is confirmed with the Subscription Arn.

The Subscribed topic is deleted.

Snap Pack History


Related Content

Amazon SNS Snap Pack

https://docs-snaplogic.atlassian.net/wiki/spaces/SD/pages/1439233/Glossary

https://docs-snaplogic.atlassian.net/wiki/spaces/SD/pages/1438341/Getting+Started

https://docs-snaplogic.atlassian.net/wiki/spaces/SD/pages/1439233/Glossary