#CMPE 273 - Lab 3 Part I - Server Side Cache Data Store

cd CMPE273-lab3/CMPE273-lab3-server
export GOPATH=$PWD # Set GO PATH
go get github.com/julienschmidt/httprouter #Get dependencies
go build src/server/Server.go # Build Server

go run src/server/Server.go

or

./Server

Put key/value pair

curl -v -X PUT  http://localhost:3000/keys/{key-id}/{value}

Sample response is : HTTP Response CODE : 200

Get key based on id

curl -X GET -v http://localhost:3000/keys/{key-id}

e.g.

curl -X GET -v http://localhost:3000/keys/2

Sample response is : HTTP Response CODE : 200

{ "key" : 2, “value” : "b" }

Get all keys

curl -X GET -v http://localhost:3000/keys

Sample response is : HTTP Response CODE : 200

[{ 
   "key" : 1,
   "value" : "a"
 },
 {
   "key" : 2,
   "value" : "b"
 }
]

#CMPE 273 - Lab 3 Part II - Consistent Hashing on Client Side

Before running Client, please ensure that the above Server instance (from Part I) is running on three different ports (e.g. 3000, 3001, 3002). For doing the same, make two more copies of 'CMPE273-lab3-server' folder and change below code (with appropriate port added) in src\server\Server.go

    server := http.Server{
            Addr:        "0.0.0.0:3000",
            Handler: mux,
    }

This Client uses the Consistent Hashing Algorithm to hash above Server instances and keys (using MD5 as hashing function). It shards the data set among these Servers.

Please note that this Client could be run as REST client or as a STANDALONE GO Application

cd CMPE273-lab3/CMPE273-lab3-client
export GOPATH=$PWD # Set GO PATH
go get github.com/julienschmidt/httprouter #Get dependencies
go build -v ./...  # Build the project
go build src/client/Client.go # Build Server

go run src/client/Client.go

or

./Client

Put key/value pair

curl -v -X PUT  http://localhost:8080/keys/{key-id}/{value}

Sample response is : HTTP Response CODE : 200

Get key based on id

curl -X GET -v http://localhost:8080/keys/{key-id}

e.g.

curl -X GET -v http://localhost:8080/keys/2

Sample response is : HTTP Response CODE : 200

{ "key" : 2, “value” : "b" }

Please follow the loggers on console (For both - Client as well as Server instances) to verify how data is getting stored and retrieved from three Server instances. Alternatively, one can also make GET calls to respective Server instance to ensure that the keys are retrieved from there correctly.