TCACHE or PMRC

Poor Man Redis Cache also known a timed cache or tcache

This is a small package the provides a timed, goroutine safe cache with auto expiration for the elements. It provides the following features:

• New accept 2 parameters, the first one a time.Duration expressed in minutes, that dictates, every time the map is evaluated for values to be evicted, and a second value that sets the, expiration time of every element in the map.
• Put method accept any value and as key takes a string, if Put is called more than once with the same value, the same rules that apply to a standard map apply here as well.
• Get retrieves the given value by key and returns the value and a bool, if the key isn't there either because it is expired or there has not been one a false bool is returned and a nil. In case the value is found, an interface with a valid value is returned and bool with true as a value.

How to use it

Pretty simple, there is only one method to create a new parser just call

  cache := tcache.New(5,10) 
  // every 5 minutes elements are checked to be evicted, 10 minutes is the expiration time set on every value

To put and retrieve value to like so:

  cache.Put("keyname","value") // any value can be put inside the cache
  value, ok := cache.Get("keyname")
  if !ok {
      log.Println("value not expired")
  }

The value expires after 10 minutes ( in this example ) and it is automatically evicted.

Philosophy

This software is developed following the "mantra" keep it simple, stupid or better known as KISS. Something so simple like a cache with auto eviction should not required over engineered solutions. Though it provides most of the functionality needed by generic configuration files, and most important of all meaning full error messages.

Disclaimer

This software in alpha quality, don't use it in a production environment, it's not even completed.

Thank You Notes

I thank myself since I wrote this because I didn't want to use redis for such a simple case.