package json

import "sync"

// ----------------------------------------------------------------------------
// Request and Response
// ----------------------------------------------------------------------------

// clientRequest represents a JSON-RPC request sent by a client.
type clientRequest struct {
	// JSON-RPC protocol.
	Version string `json:"jsonrpc"`

	// A String containing the name of the method to be invoked.
	Method string `json:"method"`

	// Object to pass as request parameter to the method.
	Params interface{} `json:"params"`

	// The request id. This can be of any type. It is used to match the
	// response with the request that it is replying to.
	ID interface{} `json:"id"`
}

var clientRequestPool sync.Pool

func retainClientRequest(method string, params interface{}, id interface{}) *clientRequest {
	var cr *clientRequest
	v := clientRequestPool.Get()
	if v == nil {
		cr = &clientRequest{}
	} else {
		cr = v.(*clientRequest)
	}

	cr.Version = Version
	cr.Method = method
	cr.Params = params
	cr.ID = id

	return cr
}

func releaseClientRequest(cr *clientRequest) {
	cr.Version = ""
	cr.Method = ""
	cr.Params = nil
	cr.ID = nil

	clientRequestPool.Put(cr)
}