# Process Store
[](https://hex.pm/packages/process_store)
[](https://hexdocs.pm/process_store)
[](https://travis-ci.com/FindHotel/process_store)
[](https://github.com/FindHotel/process_store/blob/master/LICENSE)
A simple library to store and retrieve data from the process tree.
## Installation
The package is [available in Hex](https://hex.pm/packages/process_store), and can be installed by
adding `process_store` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:process_store, "~> 0.1.0"}
]
end
```
## Usage
Store a value:
```elixir
iex> ProcessStore.store(:my_key, "my value")
nil
# When a key already exists, store the new value and return the previous one.
iex> ProcessStore.store(:my_key, "a new value")
"my value"
```
Fetch a value:
```elixir
iex> ProcessStore.fetch(:my_key)
"a new value"
iex> ProcessStore.store(:non_existing_key)
nil
```
The stored values are available in different processes:
```elixir
iex> ProcessStore.store(:my_key, "my value")
nil
iex> task = Task.async(fn -> ProcessStore.fetch(:my_key) end)
%Task{
owner: #PID<0.184.0>,
pid: #PID<0.208.0>,
ref: #Reference<0.1292195905.2439512066.24239>
}
iex> Task.await(task)
"my value"
```
## Full documentation
The full documentation is available at [https://hexdocs.pm/process_store](https://hexdocs.pm/process_store).
## Development
Helpful make commands are available for development, like to install dependencies and run tests.
To list all the make commands:
```sh
make
```
### Release
After merge a new feature/bug you can bump and publish it with:
```sh
make release
make publish
```
## Contributing
See the [contributing guide](https://github.com/FindHotel/process_store/blob/master/CONTRIBUTING.md).
## License
Process Store is released under the Apache 2.0 License. See the
[LICENSE](https://github.com/FindHotel/process_store/blob/master/LICENSE) file.
## Author
[FindHotel](https://github.com/FindHotel)
