# metric2fs-rs

A simple graphite metric metadata storage.

This is a POC.

## Features

Handle most, but not all, graphite paths style & wildcards listed on https://graphite.readthedocs.io/en/latest/render_api.html#paths-and-wildcards

* Asterisk globbing (eg: `test*`);
* List & ranges (eg: `[a-z0-9]` or `[abc]`);
* Value lists (eg: `{abc,def}`).

However, the double star globbing is not supported (eg: `**`).


## Build & run

```sh
cargo build
RUST_LOG=debug cargo run
```

## API

### Write a metric

Send a POST request to `/metric` with metric(s) in the body

```sh
curl -sq -d testaroo.a.a.a http://localhost:3000/metric
```

### Retrieve metrics

Send a GET request to `/metric` with `q=` parameter as a globbing expression

```sh
curl "http://localhost:3000/metric?q=te*ar*.\{a\}.\{b,c\}.\[bcd\]"
```

## Testing

```sh
for metric in testaroo.{a,b,c}.{a,b,c}.{a,b,c,d,e,f}; do curl -sq -d $metric http://localhost:3000/metric ; done
curl "http://localhost:3000/metric?q=te*ar*.\{a\}.\{b,c\}.\[b-e\]"
testaroo.a.b.b
testaroo.a.b.c
testaroo.a.b.d
testaroo.a.b.e
testaroo.a.c.b
testaroo.a.c.c
testaroo.a.c.d
testaroo.a.c.e
```