chartmetric-go

An abstraction of Charmetric's API in Go with automated concurrency.

Packages Included

1. CallMaker

CallMaker

See presentation slides on module implementation GoogleSlides

Allows for the creation of reusable API call objects. Automates concurrent API calls from a list of url parameters.

Installation

go get github.com/type9/chartmetric-go/api

Usage

In order to make a call object you need to specify two things, a request formatting function and parameters

Formatting function example (invokes parameters, returns *http.Request)

func getPokemonByName(kwargs map[string]interface{}) *http.Request {
	reqBody, err := json.Marshal(map[string]interface{}{})

	url := fmt.Sprintf("https://pokeapi.co/api/v2/pokemon/%s", kwargs["name"])

	req, err := http.NewRequest("GET", url, bytes.NewBuffer(reqBody)) // creating a custom http request, can be any
	req.Header.Set("Content-type", "application/json")
	if err != nil {
		log.Fatalln(err)
	}

	return req
}

Then, specify literal parameters and the formatting function into Call{} objects

func TestCallOnce() {
	param := map[string]interface{}{
		"name": "ditto",
	}
	call := Call{param, getPokemonByName} // creates call object with parameters and formatting function
	call.CallOnce() //executes the call using Client.Do() and returns http.Response object
}

For a multiple API calls on a same url with varying parameters, use the MultiCall object

func TestCallMulti(callback) {
	params := []map[string]interface{}{ // list of parameters
		{"name": "ditto"},
		{"name": "charizard"},
		{"name": "mew"},
		{"name": "pikachu"},
		{"name": "lapras"},
	}
	mcall := MultiCall{params, getPokemonByName} // create MultiCall object with a list of parameters and formatting function
	mcall.CallMulti(callback) // specifiy a callback function that accepts http.Repsonse objects to process the data as you wish
}