# Nebulex adapter for Memcached
[](https://circleci.com/gh/vasuadari/nebulex_memcached_adapter)
[](https://coveralls.io/github/vasuadari/nebulex_memcached_adapter?branch=task%2Fsetup_ci)
This adapter is implemented using [Memcachex](https://github.com/ananthakumaran/memcachex),
a Memcached driver for Elixir.
This adapter supports multiple connection pools against different Memcached nodes
in a cluster. This feature enables resiliency and also be able to survive
in case any node(s) gets unreachable.
## Installation
Add `nebulex_memcached_adapter` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:nebulex_memcached_adapter, "~> 0.1.0"}
]
end
```
## Usage
After installing, we can define our cache to use Memcached adapter as follows:
```elixir
defmodule MyApp.MemcachedCache do
use Nebulex.Cache,
otp_app: :nebulex,
adapter: NebulexMemcachedAdapter
end
```
The rest of Memcached configuration is set in our application environment, usually
defined in your `config/config.exs`:
```elixir
config :my_app, MyApp.MemcachedCache,
pools: [
primary: [
host: "127.0.0.1",
port: 11211,
pool_size: 10
],
#=> maybe more pools
]
```
Since this adapter is implemented by means of `Memcachex`, it inherits the same
options, including regular Memcached options and connection options as well. For
more information about the options, please check out `NebulexMemcachedAdapter`
module and also [Memcachex](https://github.com/ananthakumaran/memcachex).
## Testing
### Docker
```
docker-compose run test
```
### Without Docker
Ensure you have Memcached up and running on **localhost**(default host) and
**11211**(default port).
Since `NebulexMemcachedAdapter` uses the support modules and shared tests from
Nebulex and by default its `test` folder is not included within the `hex`
dependency, it is necessary to fetch `:nebulex` dependency directly from GtiHub.
Fetch deps:
```
$ MIX_ENV=test mix deps.get
```
Now we can run the tests:
```
$ mix test
```
Running tests with coverage:
```
$ mix coveralls.html
```
You can find the coverage report within `cover/excoveralls.html`.
## Benchmarks
Benchmarks were added using [benchee](https://github.com/PragTob/benchee);
to learn more, see the [benchmarks](./benchmarks) directory.
To run the benchmarks:
```
$ mix deps.get && mix run benchmarks/benchmark.exs
```
## Contributing
Contributions to Nebulex are very welcome and appreciated!
Use the [issue tracker](https://github.com/vasuadari/nebulex_memcached_adapter/issues)
for bug reports or feature requests. Open a
[pull request](https://github.com/vasuadari/nebulex_memcached_adapter/pulls)
when you are ready to contribute.
When submitting a pull request you should not update the [CHANGELOG.md](CHANGELOG.md),
and also make sure you test your changes thoroughly, include unit tests
alongside new or changed code.
Before to submit a PR it is highly recommended to run:
* `mix test` to run tests
* `mix coveralls.html && open cover/excoveralls.html` to run tests and check
out code coverage (expected 100%).
* `mix format && mix credo --strict` to format your code properly and find code
style issues
* `mix dialyzer` to run dialyzer for type checking; might take a while on the
first invocation
## Copyright and License
Copyright (c) 2018, Vasu Adari.
NebulexMemcachedAdapter source code is licensed under the [MIT License](LICENSE).
