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Fedora Repository API implemented with AWS Lambda, API Gateway and DynamoDB

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# Lambdora
A serverless implementation of the Fedora Repository API on AWS. Uses the following technologies:
* [Serverless.com](https://serverless.com/) toolkit: Used to deploy all resources to AWS.
* [API Gateway](https://aws.amazon.com/api-gateway/): Handles all REST requests
* [Lambda](https://aws.amazon.com/lambda/): Java code that responds to all requests and sends back responses.
* [DynamoDB](https://aws.amazon.com/dynamodb/): Data storage layer for all RDF triples

## Documentation
Additional documentation is available in the project wiki: https://github.com/duraspace/lambdora/wiki

## Setup
1. Download and install serverless and configure aws credentials
   https://serverless.com/framework/docs/providers/aws/guide/quick-start/#pre-requisites
1. Install Gradle: https://gradle.org/install/
1. ``gradle wrapper``
1. ``./gradlew build``
1. Deploy
   ``serverless deploy --aws-profile <your-profile-name> [--region <aws-region-name-here>]``

## Tests
Tests are run as part of the Gradle build process described above. 
Test results are available via a website which is generated by the build and can be accessed by opening 
`<lambdora-project-dir>/lambdora-service/build/reports/tests/test/index.html`
in a web browser. These pages provide a summary of tests run.

## Monitoring Logs
Currently all requests to Lambdora are logged (to provide for easier debugging of REST requests). These logs can accessed via `serverless` as follows:

```
serverless logs -f ldpJersey -t --aws-profile <your-profile-name> [--region <aws-region-name-here>]
```

You may wish to pipe this output to a local file (`> lambdora-logs.txt`) in order to more easily parse/monitor the requests.

## Redeploy / Teardown

### Redeploy minor changes
For minor updates (e.g. code changes, or Lambda function changes) should be possible to redeploy by simply rerunning the same deploy command:

```
serverless deploy --aws-profile <your-profile-name> [--region <aws-region-name-here>]
```

### Teardown & Redeploy major changes

If you wish to redeploy major updates, you may need to first teardown the existing stack.  Be warned that this destroys all existing content, tables, REST endpoints, etc.

```
serverless remove --aws-profile <your-profile-name> [--region <aws-region-name-here>]
```

## Code License
All code is licensed under Apache 2. See `LICENSE` file in root directory.

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