# `Nebulex.Caching.SimpleKeyGenerator`
[🔗](https://github.com/elixir-nebulex/nebulex/blob/v2.6.6/lib/nebulex/caching/simple_key_generator.ex#L1)

Default key generator implementation.

It implementats a simple algorithm:

  * If no params are given, return `0`.
  * If only one param is given, return that param as key.
  * If more than one param is given, return a key computed from the hashes
    of all parameters (`:erlang.phash2(args)`).

> Based on the [default key generation in Spring Cache Abstraction](https://docs.spring.io/spring-framework/docs/3.2.x/spring-framework-reference/html/cache.html#cache-annotations-cacheable-default-key).

This implementation aims to cover those simple/generic scenarios where the
key generated based on the arguments only, fulfill the needs. For example:

    defmodule MyApp.Users do
      use Nebulex.Caching

      alias MayApp.Cache

      @decorate cacheable(cache: Cache)
      def get_user(id) do
        # logic for retrieving a user...
      end

      @decorate cache_evict(cache: Cache)
      def delete_user(id) do
        # logic for deleting a user...
      end
    end

The key generator will generate the same key for both, cacheable and
evict functions; since it is generated based on the arguments only.

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*Consult [api-reference.md](api-reference.md) for complete listing*