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https://github.com/elegantdevelopment/aws-cdk-dynamodb-seeder
A simple CDK seeder for DynamoDB
https://github.com/elegantdevelopment/aws-cdk-dynamodb-seeder
amazon-dynamodb aws aws-cdk cdk-seeder dynamodb iac seeder
Last synced: about 2 months ago
JSON representation
A simple CDK seeder for DynamoDB
- Host: GitHub
- URL: https://github.com/elegantdevelopment/aws-cdk-dynamodb-seeder
- Owner: elegantdevelopment
- License: apache-2.0
- Created: 2020-02-19T16:55:19.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2023-01-06T02:35:15.000Z (over 1 year ago)
- Last Synced: 2024-05-07T13:41:28.589Z (about 2 months ago)
- Topics: amazon-dynamodb, aws, aws-cdk, cdk-seeder, dynamodb, iac, seeder
- Language: TypeScript
- Homepage:
- Size: 767 KB
- Stars: 35
- Watchers: 3
- Forks: 6
- Open Issues: 18
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
Lists
- awesome-cdk - aws-cdk-dynamodb-seeder - A simple CDK seeder for DynamoDB. (Construct Libraries / Databases)
- awesome-cdk - aws-cdk-dynamodb-seeder - A simple CDK seeder for DynamoDB (Construct Libraries)
README
# aws-cdk-dynamodb-seeder [](https://github.com/eladb/awesome-cdk)
[](https://codecov.io/gh/elegantdevelopment/aws-cdk-dynamodb-seeder)
[](https://david-dm.org/elegantdevelopment/aws-cdk-dynamodb-seeder)
[](https://www.npmjs.com/package/aws-cdk-dynamodb-seeder)
[](https://badge.fury.io/js/aws-cdk-dynamodb-seeder)
[](https://badge.fury.io/nu/ElegantDevelopment.AWSCDKDynamoDBSeeder)
[](https://badge.fury.io/py/aws-cdk-dynamodb-seeder)
[](https://repo1.maven.org/maven2/io/github/elegantdevelopment/AWSCDKDynamoDBSeeder/)
A simple CDK JSON seeder for DynamoDB
## Why this package
Glad you asked!
Using [AWS CDK] for automating infrastructure deployments is an amazing way of integrating the development and operations into one process and one codebase.
However, building dev or test environments that come pre-populated with data can be tricky, especially when using [Amazon DynamoDB].
## How do I use it
Install using your favourite package manager:
```sh
yarn add aws-cdk-dynamodb-seeder
```
### Example TypeScript usage
```ts
import { Seeder } from 'aws-cdk-dynamodb-seeder';
...
const myTable = new Table(stack, "MyTable", {
tableName: "MyTable",
partitionKey: { name: "Id", type: AttributeType.STRING },
});
...
new Seeder(stack, "MySeeder", {
table: myTable,
setup: require("./items-to-put.json"),
teardown: require("./keys-to-delete.json"),
refreshOnUpdate: true // runs setup and teardown on every update, default false
});
```
For a more in-depth example, see: [elegantdevelopment/aws-cdk-dynamodb-seeder-examples](https://github.com/elegantdevelopment/aws-cdk-dynamodb-seeder-examples).
### Importing seed data
Data passed into `setup` ("Items" to put) or `teardown` ("Keys" to delete) should be an `array` of objects (that are, in turn, representations of `string` to [AttributeValue] maps).
* `setup` elements should use the format of `params.Item` from [AWS.DynamoDB.DocumentClient.put()]
* `teardown` elements should use the format of `params.Key` from [AWS.DynamoDB.DocumentClient.delete()]
## Versioning
We will *attempt* to align the major and minor version of this package with [AWS CDK], but always check our release descriptions for compatibility.
We currently support [](https://github.com/aws/aws-cdk)
## Internals
Behind the scenes we use an [AwsCustomResource] as a representation of the related table's seed state. The custom resource's event handlers invoke a [Function] to perform setup and/or teardown actions.
### Deploying a stack
On deployment, we write copies of your seed data locally and use a [BucketDeployment] to write it to an S3 [Bucket].
We then create the handler function and custom resource to field seed requests (the `onCreate` event will immediate fire as the stack deploys, reading the data from the bucket and seeding the table using [AWS.DynamoDB.DocumentClient]).
### Updating a stack
On a stack update, the `onUpdate` handler is triggered when `refreshOnUpdate` is `true`.
This will run [AWS.DynamoDB.DocumentClient.delete()] on every teardown "Key" followed by [AWS.DynamoDB.DocumentClient.put()] on every setup "Item".
### Destroying a stack
When the stack is destroyed, the event handler's `onDelete` function will be invoked, providing `teardown` is set.
This simply runs [AWS.DynamoDB.DocumentClient.delete()] on every teardown "Key" before destroying the `Seeder`'s resources.
[aws cdk]: https://aws.amazon.com/cdk
[amazon dynamodb]: https://aws.amazon.com/dynamodb
[AttributeValue]: https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_AttributeValue.html
[AWS.DynamoDB.DocumentClient]: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html
[AWS.DynamoDB.DocumentClient.put()]: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#put-property
[AWS.DynamoDB.DocumentClient.delete()]: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#delete-property
[AwsCustomResource]: https://docs.aws.amazon.com/cdk/api/latest/typescript/api/custom-resources/awscustomresource.html
[Function]: https://docs.aws.amazon.com/cdk/api/latest/typescript/api/aws-lambda/function.html#aws_lambda_Function
[Bucket]: https://docs.aws.amazon.com/cdk/api/latest/typescript/api/aws-s3/bucket.html#aws_s3_Bucket
[BucketDeployment]: https://docs.aws.amazon.com/cdk/api/latest/typescript/api/aws-s3-deployment/bucketdeployment.html#aws_s3_deployment_BucketDeployment