Metadata repository
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## Metadata repository

Running the component requires a repository where it can store information about allocated slots. For this, a metadata repository is used. It is possible to specify a specific implementation of `FileUploadRepository` for every domain.

By default, metadata for all domains will be stored in the `default` repository. Implementation of which will be selected based on kind of data source defined as `default`.

### DummyFileUploadRepository

This is very simple repository which does not store any data. Due to that, it can be very fast! However, it is not able to remove old uploads and apply any upload limits.

### JDBCFileUploadRepository

This repository implementation stores data in database used to store procedures and functions. By default, data should be stored in the `tig_hfu_slots` table but it can be changed by modification of stored procedures or reconfiguration of the repository implementation to use different stored procedures and functions than provided.

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