Auction and Bidding components are divided into two sub-services under root auction_service package.
APIs:
POST /bid
DTOs:
type BidRequest struct {
MsgID string `json:"MsgID"`
AdPlacementId string `json:"AdPlacementId"`
}
type BidResponse struct {
AdID string `json:"AdID"`
BidPrice int64 `json:"BidPrice"`
}When bidding service receives a request on /bid API a random UUID is generated for AdID and a random integer is generated to be used as BidPrice.
And for generating failure scenarios I'm failing 1 out of 5 requests (pseudo random way) by generating random number from 0-4 and returning 204 in case value is 1.
APIS:
POST /auction
DTOs:
type AuctionObject struct {
AdID string `json:"AdID"`
BidPrice int64 `json:"BidPrice"`
AdPlacementId string `json:"AdPlacementId"`
}
type AuctionRequest struct {
MsgID string `json:"MsgID"`
AdPlacementId string `json:"AdPlacementId"`
}
type AuctionResponse struct {
Ads []*service.AuctionObject `json:"Ads"`
}
On getting a request on /auction API auction service hits bidding service concurrently BIDDING_COUNT times and returns the responses it go from all the calls combined in an array of responses.
A rate limiter middleware was enabled to this API to accept only 5 requests in a second and other requests will be returned an error with status code 429.
Assuming docker-compose, docker are already installed in the system
$ cd $GOPATH/src
$ git clone git@github.com:Prashant-Surya/auction_service.git
$ cd auction_service
$ docker-compose up -d
Once it's up, /auction API is available at port 8081.
Sample Curl:
curl -X POST \
http://localhost:8081/auction \
-H 'Content-Type: application/json' \
-H 'cache-control: no-cache' \
-d '{
"AdPlacementId": "123"
}'
For testing /bid of bidding service, it's reachable at localhost:8080
Sample Curl:
curl -X POST \
http://localhost:8080/bid \
-H 'Content-Type: application/json' \
-H 'cache-control: no-cache' \
-d '{
"AdPlacementId": "tea",
"MsgID": "ms"
}'