[App] Onboarding guide for Go in the app (#123)

* changes required for onboarding example, and for listeners.

* adjusting linter complaint

* removed onboarding example - does not belong here.

Author: pawels-optimizely

optimizely/client/client.go

@@ -35,9 +35,9 @@ var logger = logging.GetLogger("Client")
 
 // OptimizelyClient is the entry point to the Optimizely SDK
 type OptimizelyClient struct {
-	configManager   optimizely.ProjectConfigManager
-	decisionService decision.Service
-	eventProcessor  event.Processor
+	ConfigManager   optimizely.ProjectConfigManager
+	DecisionService decision.Service
+	EventProcessor  event.Processor
 
 	executionCtx utils.ExecutionCtx
 }
@@ -82,7 +82,7 @@ func (o *OptimizelyClient) IsFeatureEnabled(featureKey string, userContext entit
 	if featureDecision.Source == decision.FeatureTest {
 		// send impression event for feature tests
 		impressionEvent := event.CreateImpressionUserEvent(context.ProjectConfig, featureDecision.Experiment, *featureDecision.Variation, userContext)
-		o.eventProcessor.ProcessEvent(impressionEvent)
+		o.EventProcessor.ProcessEvent(impressionEvent)
 	}
 	return result, err
 }
@@ -153,7 +153,7 @@ func (o *OptimizelyClient) Track(eventKey string, userContext entities.UserConte
 
 	if err == nil {
 		userEvent := event.CreateConversionUserEvent(projectConfig, configEvent, userContext, eventTags)
-		o.eventProcessor.ProcessEvent(userEvent)
+		o.EventProcessor.ProcessEvent(userEvent)
 	} else {
 		errorMessage := fmt.Sprintf(`optimizely SDK track: error getting event with key "%s"`, eventKey)
 		logger.Error(errorMessage, err)
@@ -408,7 +408,7 @@ func (o *OptimizelyClient) getFeatureDecision(featureKey string, userContext ent
 		ProjectConfig: projectConfig,
 	}
 
-	featureDecision, err = o.decisionService.GetFeatureDecision(decisionContext, userContext)
+	featureDecision, err = o.DecisionService.GetFeatureDecision(decisionContext, userContext)
 	if err != nil {
 		err = nil
 		logger.Warning("error making a decision")
@@ -422,7 +422,7 @@ func (o *OptimizelyClient) getFeatureDecision(featureKey string, userContext ent
 // GetProjectConfig returns the current ProjectConfig or nil if the instance is not valid
 func (o *OptimizelyClient) GetProjectConfig() (projectConfig optimizely.ProjectConfig, err error) {
 
-	projectConfig, err = o.configManager.GetConfig()
+	projectConfig, err = o.ConfigManager.GetConfig()
 	if err != nil {
 		return nil, err
 	}