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# AWS Glue code examples for the SDK for Ruby

## Overview

Shows how to use the AWS SDK for Ruby to work with AWS Glue.

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*AWS Glue is a scalable, serverless data integration service that makes it easy to discover, prepare, and combine data for analytics, machine learning, and application development.*

## ⚠ Important

* Running this code might result in charges to your AWS account.
* Running the tests might result in charges to your AWS account.
* We recommend that you grant your code least privilege. At most, grant only the minimum permissions required to perform the task. For more information, see [Grant least privilege](https://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html#grant-least-privilege).
* This code is not tested in every AWS Region. For more information, see [AWS Regional Services](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services).

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## Code examples

### Prerequisites

For prerequisites, see the [README](../../README.md#Prerequisites) in the `ruby` folder.


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### Single actions

Code excerpts that show you how to call individual service functions.

* [Create a crawler](glue_wrapper.rb#L34) (`CreateCrawler`)
* [Create a job definition](glue_wrapper.rb#L116) (`CreateJob`)
* [Delete a crawler](glue_wrapper.rb#L75) (`DeleteCrawler`)
* [Delete a database from the Data Catalog](None) (`DeleteDatabase`)
* [Delete a job definition](glue_wrapper.rb#L203) (`DeleteJob`)
* [Delete a table from a database](glue_wrapper.rb#L215) (`DeleteTable`)
* [Get a crawler](glue_wrapper.rb#L18) (`GetCrawler`)
* [Get a database from the Data Catalog](glue_wrapper.rb#L88) (`GetDatabase`)
* [Get a job run](glue_wrapper.rb#L189) (`GetJobRun`)
* [Get runs of a job](glue_wrapper.rb#L178) (`GetJobRuns`)
* [Get tables from a database](glue_wrapper.rb#L102) (`GetTables`)
* [List job definitions](glue_wrapper.rb#L166) (`ListJobs`)
* [Start a crawler](glue_wrapper.rb#L62) (`StartCrawler`)
* [Start a job run](glue_wrapper.rb#L142) (`StartJobRun`)

### Scenarios

Code examples that show you how to accomplish a specific task by calling multiple
functions within the same service.

* [Get started with crawlers and jobs](glue_wrapper.rb) 

## Run the examples

### Instructions


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#### Get started with crawlers and jobs

This example shows you how to do the following:

* Create a crawler that crawls a public Amazon S3 bucket and generates a database of CSV-formatted metadata.
* List information about databases and tables in your AWS Glue Data Catalog.
* Create a job to extract CSV data from the S3 bucket, transform the data, and load JSON-formatted output into another S3 bucket.
* List information about job runs, view transformed data, and clean up resources.

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Before you run the example, you will need to set up an S3 bucket linked with an IAM role.
To accomplish this, navigate to the [glue_role_bucket CDK script](../../../resources/cdk/glue_role_bucket) and follow the instructions.

After completing setup, you can run the following at a command prompt:

```
ruby glue_wrapper.rb
```

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### Tests

⚠ Running tests might result in charges to your AWS account.


To find instructions for running these tests, see the [README](../../README.md#Tests)
in the `ruby` folder.


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## Additional resources

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* [SDK for Ruby Developer Guide](https://aws.amazon.com/developer/language/ruby/)
* [SDK for Ruby Amazon Glue Module](https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/Glue.html)
* [AWS Glue Developer Guide](https://docs.aws.amazon.com/glue/latest/dg/what-is-glue.html)
* [AWS Glue API Reference](https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api.html)
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SPDX-License-Identifier: Apache-2.0