FFM-4572 - Update Go version, allow custom cache, add initalLoad flag…

…, standardise segment and flags being set (#98)

* Update Go version in SDK
* Add logic to allow user defined cache to be populated
* Add flag for initial load so that oldflag check doesn't occur on first load
* Update to use more recent ff-test-cases submodule
* Pin version of Go lint as per golangci/golangci-lint-action#535

.drone.yml

@@ -5,14 +5,14 @@ name: default
 
 steps:
 - name: check
-  image: golang:1.16.2
+  image: golang:1.18.6
   commands:
   - make check
   volumes:
   - name: gopath
     path: /go
 - name: test
-  image: golang:1.16.2
+  image: golang:1.18.6
   commands:
   - make test
   volumes:

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.16.2
+        go-version: 1.18.6
 
     - name: Check
       run: make check

Makefile

@@ -78,7 +78,7 @@ sec: $(GOPATH)/bin/gosec
 
 $(GOPATH)/bin/golangci-lint:
 	@echo "🔘 Installing golangci-lint... (`date '+%H:%M:%S'`)"
-	@curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOPATH)/bin
+	@curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOPATH)/bin v1.47.3
 
 $(GOPATH)/bin/golint:
 	@echo "🔘 Installing golint ... (`date '+%H:%M:%S'`)"
@@ -95,7 +95,7 @@ $(GOPATH)/bin/gosec:
 
 $(GOPATH)/bin/oapi-codegen:
 	@echo "🔘 Installing oapicodegen ... (`date '+%H:%M:%S'`)"
-	@go get github.com/deepmap/oapi-codegen/cmd/oapi-codegen@v1.11.0
+	@go install github.com/deepmap/oapi-codegen/cmd/oapi-codegen@v1.11.0
 
 PHONY+= tools
 tools: $(GOPATH)/bin/golangci-lint $(GOPATH)/bin/golint $(GOPATH)/bin/gosec $(GOPATH)/bin/goimports $(GOPATH)/bin/oapi-codegen

client/client.go

@@ -86,11 +86,19 @@ func NewCfClient(sdkKey string, options ...ConfigOption) (*CfClient, error) {
 	if sdkKey == "" {
 		return client, types.ErrSdkCantBeEmpty
 	}
+
+	var err error
+
 	lruCache, err := repository.NewLruCache(10000)
 	if err != nil {
 		return nil, err
 	}
 	client.repository = repository.New(lruCache)
+
+	if client.config != nil {
+		client.repository = repository.New(config.Cache)
+	}
+
 	client.evaluator, err = evaluation.NewEvaluator(client.repository, client, config.Logger)
 	if err != nil {
 		return nil, err
@@ -359,7 +367,7 @@ func (c *CfClient) retrieveFlags(ctx context.Context) error {
 	}
 
 	for _, flag := range *flags.JSON200 {
-		c.repository.SetFlag(flag)
+		c.repository.SetFlag(flag, true)
 	}
 	c.config.Logger.Info("Retrieving flags finished")
 	return nil
@@ -383,7 +391,7 @@ func (c *CfClient) retrieveSegments(ctx context.Context) error {
 	}
 
 	for _, segment := range *segments.JSON200 {
-		c.repository.SetSegment(segment)
+		c.repository.SetSegment(segment, true)
 	}
 	c.config.Logger.Info("Retrieving segments finished")
 	return nil

client/helpers_test.go

@@ -53,7 +53,11 @@ func MakeStringFeatureConfigs(name, defaultVariation, offVariation, state string
 
 	// If there are any PreReqs then we need to store them as flags as well.
 	for _, x := range preReqs {
-		featureConfig = append(featureConfig, MakeBoolFeatureConfig(x.Feature, "true", "false", x.Variations[0], nil))
+		state := "off"
+		if x.Variations[0] == "true" {
+			state = "on"
+		}
+		featureConfig = append(featureConfig, MakeBoolFeatureConfig(x.Feature, "true", "false", state, nil))
 	}
 
 	return featureConfig

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.16-alpine as builder
+FROM golang:1.18.6-alpine as builder
 RUN apk update && apk add --no-cache make gcc musl-dev git ca-certificates && update-ca-certificates
 WORKDIR /app
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/harness/ff-golang-server-sdk
 
-go 1.16
+go 1.18
 
 require (
 	github.com/deepmap/oapi-codegen v1.11.0
@@ -16,7 +16,24 @@ require (
 	github.com/r3labs/sse v0.0.0-20201126193848-34e640891548
 	github.com/spaolacci/murmur3 v1.1.0
 	github.com/stretchr/testify v1.7.1
-	go.uber.org/multierr v1.6.0 // indirect
 	go.uber.org/zap v1.16.0
 	gopkg.in/cenkalti/backoff.v1 v1.1.0
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/ghodss/yaml v1.0.0 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/swag v0.21.1 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.1 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	golang.org/x/net v0.0.0-20220513224357-95641704303c // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)

pkg/repository/repository.go

@@ -13,8 +13,8 @@ type Repository interface {
 	GetFlag(identifier string) (rest.FeatureConfig, error)
 	GetSegment(identifier string) (rest.Segment, error)
 
-	SetFlag(featureConfig rest.FeatureConfig)
-	SetSegment(segment rest.Segment)
+	SetFlag(featureConfig rest.FeatureConfig, initialLoad bool)
+	SetSegment(segment rest.Segment, initialLoad bool)
 
 	DeleteFlag(identifier string)
 	DeleteSegment(identifier string)
@@ -107,9 +107,11 @@ func (r FFRepository) GetSegment(identifier string) (rest.Segment, error) {
 }
 
 // SetFlag places a flag in the repository with the new value
-func (r FFRepository) SetFlag(featureConfig rest.FeatureConfig) {
-	if r.isFlagOutdated(featureConfig) {
-		return
+func (r FFRepository) SetFlag(featureConfig rest.FeatureConfig, initialLoad bool) {
+	if !initialLoad {
+		if r.isFlagOutdated(featureConfig) {
+			return
+		}
 	}
 	flagKey := formatFlagKey(featureConfig.Feature)
 	if r.storage != nil {
@@ -127,9 +129,11 @@ func (r FFRepository) SetFlag(featureConfig rest.FeatureConfig) {
 }
 
 // SetSegment places a segment in the repository with the new value
-func (r FFRepository) SetSegment(segment rest.Segment) {
-	if r.isSegmentOutdated(segment) {
-		return
+func (r FFRepository) SetSegment(segment rest.Segment, initialLoad bool) {
+	if !initialLoad {
+		if r.isSegmentOutdated(segment) {
+			return
+		}
 	}
 	segmentKey := formatSegmentKey(segment.Identifier)
 	if r.storage != nil {
@@ -202,9 +206,9 @@ func (r FFRepository) Close() {
 }
 
 func formatFlagKey(identifier string) string {
-	return "flags/" + identifier
+	return "flag/" + identifier
 }
 
 func formatSegmentKey(identifier string) string {
-	return "segments/" + identifier
+	return "target-segment/" + identifier
 }

stream/sse.go

@@ -134,7 +134,7 @@ func (c *SSEClient) handleEvent(event Event) {
 				}
 
 				if response.JSON200 != nil {
-					c.repository.SetFlag(*response.JSON200)
+					c.repository.SetFlag(*response.JSON200, false)
 				}
 			}
 
@@ -159,7 +159,7 @@ func (c *SSEClient) handleEvent(event Event) {
 					return
 				}
 				if response.JSON200 != nil {
-					c.repository.SetSegment(*response.JSON200)
+					c.repository.SetSegment(*response.JSON200, false)
 				}
 			}
 			updateWithTimeout()

test_wrapper/go.mod

@@ -1,6 +1,6 @@
 module github.com/harness/ff-golang-server-sdk/test_wrapper
 
-go 1.16
+go 1.18
 
 replace github.com/harness/ff-golang-server-sdk => ../
 

tests/evaluator_test.go

@@ -84,10 +84,10 @@ func TestEvaluator(t *testing.T) {
 			t.Error(err)
 		}
 		for _, flag := range fixture.Flags {
-			repo.SetFlag(flag)
+			repo.SetFlag(flag, false)
 		}
 		for _, segment := range fixture.Segments {
-			repo.SetSegment(segment)
+			repo.SetSegment(segment, false)
 		}
 
 		for _, testCase := range fixture.Tests {