SNS Particle

[emr0327]

Implemented the following functionalities for the SNS particle:

• create a topic
• set up a subscription to that topic
• update the subscription attributes
• delete the subscription
• delete the topic

Acceptance Criteria:

• [x] particle
• [x] tests
• [x] example

Resolves #65

[emr0327]

@anovis look at my Slack message

[emr0327]

@bb1314 @anovis Getting this error when running the example: botocore.errorfactory.InvalidParameterException: An error occurred (InvalidParameter) when calling the CreateTopic operation: Invalid parameter: Attributes Reason: Topic already exists with different attributes

maybe one of you can help

[ethanwlo]

@emr0327 Do you know at which phase you're running into that error? Was it during _start() or _update()?

[emr0327]

@bb1314 it is happening in the _start() method when trying to update the particle with a different attribute. Seems as though on the apply() to update, get_current_definition() is returning ‘State.terminated’ so that is causing _start() to get called.

[ethanwlo]

So... @emr0327 AWS just added tagging for SNS Topic. Before we close this PR, lets add the logic to handle tags as part of the particle. https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/sns.html#SNS.Client.create_topic

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