go-cache

A light-weight caching library for Go. It can cache the results of a function with given TTL.

Known caveats

1. Return value of the function to be cached should be exactly a result (of any type) and an error
2. Function to be cached should not be declared using var fn = func syntax but func fn instead. (This is because the library uses reflection to fetch the function name)
3. Data in the InApp store just expires, but is never deleted even after TTL. So it should be used responsibly.

Usage

1. Init config (only to be done once, generally at the start of your service)

//call Init with config map (refer config.json for sample)
Init(cfg)

2. Instantiate a cache store (store is meant to be reused across calls to Cache)

//store is to be instantiated only once and not on every call to Cache()
store := NewInApp()

3. Use the store in Cache function as

res, err := Cache(ctx, key, store, fn, args...)

4. Then you need to type case the result into the expected return type of the function

s, _ := res.(string)

Use any of the available stores like -

InApp,
InRedis,
or implement your own custom store.

see examples_test.go for more