Feat/reset api limit (#114)

* feat: reset limit in db

* add: new limit in DB

* add: reset the lambda concurrency to unreserved so the lambda's are in working state again

* add: new lambda to reset the limit

getUserFeatureFlag/main.go

@@ -11,6 +11,7 @@ import (
 	lambda "github.com/aws/aws-lambda-go/lambda"
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/dynamodb"
+	"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
 )
 
 func processGetById(userId string, flagId string) (*utils.FeatureFlagUserMappingResponse, error) {

rateLimiterLambda/main.go

@@ -88,7 +88,7 @@ func handler(ctx context.Context, event json.RawMessage) (events.APIGatewayProxy
 	var lambdaConcurrencyValue LambdaConcurrencyValue
 	if err := json.Unmarshal(event, &lambdaConcurrencyValue); err != nil {
 		return events.APIGatewayProxyResponse{
-			Body: "Unable to read input",
+			Body:       "Unable to read input",
 			StatusCode: http.StatusBadRequest,
 		}, nil
 	}
@@ -108,27 +108,27 @@ func handler(ctx context.Context, event json.RawMessage) (events.APIGatewayProxy
 	for _, functionName := range request.FunctionNames {
 		// Increment the WaitGroup counter
 		wg.Add(1)
-	
+
 		// Start a goroutine to update the concurrency for the Lambda function
 		go func(fn string) {
 			defer wg.Done()
-	
+
 			input := &lambda.PutFunctionConcurrencyInput{
 				FunctionName:                 &fn,
 				ReservedConcurrentExecutions: aws.Int64(int64(lambdaConcurrencyValue.IntValue)),
 			}
-	
+
 			log.Println("Is the function name", fn)
 			_, err := lambdaClient.PutFunctionConcurrency(input)
 			if err != nil {
 				log.Printf("Error in setting the concurrency for the lambda name %s: %v", fn, err)
 				utils.ServerError(err)
 			}
-	
+
 			log.Printf("Changed the reserved concurrency for the function %s to %d", fn, lambdaConcurrencyValue.IntValue)
 		}(functionName)
 	}
-	
+
 	// Wait for all goroutines to finish
 	wg.Wait()
 	return events.APIGatewayProxyResponse{

resetLimitLambda/Makefile

@@ -0,0 +1,3 @@
+build-ResetLimitFunction:
+	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o bootstrap
+	cp ./bootstrap $(ARTIFACTS_DIR)/.

resetLimitLambda/go.mod

@@ -0,0 +1,16 @@
+module rateLimiterLambda
+
+go 1.20
+
+require (
+	github.com/Real-Dev-Squad/feature-flag-backend v0.0.0-20231002185428-1ab29298fc37
+	github.com/aws/aws-lambda-go v1.41.0
+	github.com/aws/aws-sdk-go v1.44.323
+)
+
+replace github.com/Real-Dev-Squad/feature-flag-backend => /Users/mehul/oss/feature-flag-backend
+
+require (
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+)

resetLimitLambda/go.sum

@@ -0,0 +1,50 @@
+github.com/aws/aws-lambda-go v1.41.0 h1:l/5fyVb6Ud9uYd411xdHZzSf2n86TakxzpvIoz7l+3Y=
+github.com/aws/aws-lambda-go v1.41.0/go.mod h1:jwFe2KmMsHmffA1X2R09hH6lFzJQxzI8qK17ewzbQMM=
+github.com/aws/aws-sdk-go v1.44.323 h1:97/dn93DWrN1VfhAWQ2tV+xuE6oO/LO9rSsEsuC4PLU=
+github.com/aws/aws-sdk-go v1.44.323/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
+github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.1.0 h1:hZ/3BUoy5aId7sCpA/Tc5lt8DkFgdVS2onTpJsZ/fl0=
+golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.1.0/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
+golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

resetLimitLambda/main.go

@@ -0,0 +1,197 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"net/http"
+	"os"
+	"sync"
+
+	"github.com/Real-Dev-Squad/feature-flag-backend/database"
+	"github.com/Real-Dev-Squad/feature-flag-backend/models"
+	"github.com/Real-Dev-Squad/feature-flag-backend/utils"
+	"github.com/aws/aws-lambda-go/events"
+	lambda1 "github.com/aws/aws-lambda-go/lambda"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/dynamodb"
+	"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
+	lambda "github.com/aws/aws-sdk-go/service/lambda"
+)
+
+type Request struct {
+	FunctionNames []string `json:"functionNames"`
+}
+
+type LambdaConcurrencyValue struct {
+	IntValue int `json:"intValue"`
+}
+
+type ConcurrencyLimitRequest struct {
+	PendingLimit int16 `json:"pendingLimit"`
+}
+
+var createFeatureFlagFunctionName string
+var getUserFeatureFlagFunctionName string
+var createUserFeatureFlagFunctionName string
+var getAllFeatureFlagsFunctionName string
+var getUserFeatureFlagsFunctionName string
+var updateFeatureFlagFunctionName string
+var getFeatureFlagFunctionName string
+var getUserFeatureFlagFunction string
+var requestLimitTableName = "requestLimit"
+
+func init() {
+	env, found := os.LookupEnv(utils.ENV)
+	if !found {
+		log.Print("Env variable not set, making it by default PROD")
+		os.Setenv(utils.ENV, utils.PROD)
+	}
+	log.Printf("The env is %v", env)
+
+	createFeatureFlagFunctionName, found = os.LookupEnv("CreateFeatureFlagFunction")
+	if !found {
+		log.Println("Create feature flag function name not being set")
+	}
+
+	getUserFeatureFlagFunctionName, found = os.LookupEnv("GetUserFeatureFlagFunction")
+	if !found {
+		log.Println("Create feature flag function name not being set")
+	}
+
+	createUserFeatureFlagFunctionName, found = os.LookupEnv("CreateUserFeatureFlagFunction")
+	if !found {
+		log.Println("Create user feature flag function name not being set")
+	}
+
+	getUserFeatureFlagsFunctionName, found = os.LookupEnv("GetUserFeatureFlagsFunction")
+	if !found {
+		log.Println("get user feature flags function name not being set")
+	}
+
+	getAllFeatureFlagsFunctionName, found = os.LookupEnv("GetAllFeatureFlagFunction")
+	if !found {
+		log.Println("get all feature flag function name not being set")
+	}
+
+	updateFeatureFlagFunctionName, found = os.LookupEnv("UpdateFeatureFlagFunction")
+	if !found {
+		log.Println("Update feature flag function name not being set")
+	}
+
+	getFeatureFlagFunctionName, found = os.LookupEnv("GetFeatureFlagFunction")
+	if !found {
+		log.Println("get feature flag function name not being set")
+	}
+}
+
+func handler(ctx context.Context, event events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
+	var concurrencyLimitRequest ConcurrencyLimitRequest
+	if err := json.Unmarshal([]byte(event.Body), &concurrencyLimitRequest); err != nil {
+		return events.APIGatewayProxyResponse{
+			Body:       "Unable to read input",
+			StatusCode: http.StatusBadRequest,
+		}, nil
+	}
+
+	sess, err := session.NewSession()
+	if err != nil {
+		log.Println("Error in creation of AWS session, please contact on #feature-flag-service discord channel.")
+	}
+	lambdaClient := lambda.New(sess)
+
+	var request = Request{
+		FunctionNames: []string{createFeatureFlagFunctionName,
+			createUserFeatureFlagFunctionName,
+			getFeatureFlagFunctionName,
+			getUserFeatureFlagFunctionName,
+			getAllFeatureFlagsFunctionName,
+			updateFeatureFlagFunctionName,
+			getUserFeatureFlagsFunctionName,
+		},
+	}
+
+	var wg sync.WaitGroup
+	for _, functionName := range request.FunctionNames {
+		wg.Add(1)
+		go func(fn string) {
+			defer wg.Done()
+			input := &lambda.DeleteFunctionConcurrencyInput{
+				FunctionName: &fn,
+			}
+			_, err := lambdaClient.DeleteFunctionConcurrency(input)
+			if err != nil {
+				log.Printf("Error in resetting the concurrency for the lambda name %s: %v", fn, err)
+				utils.ServerError(err)
+			}
+			log.Printf("Reset the reserved concurrency for the function %s", fn)
+		}(functionName)
+	}
+	wg.Wait()
+
+	err = updateConcurrencyLimitInDB(concurrencyLimitRequest.PendingLimit)
+	if err != nil {
+		return events.APIGatewayProxyResponse{
+			Body:       "Failed to update concurrency limit in database",
+			StatusCode: http.StatusInternalServerError,
+		}, nil
+	}
+
+	return events.APIGatewayProxyResponse{
+		Body:       "Successfully updated concurrency limit",
+		StatusCode: http.StatusOK,
+	}, nil
+}
+
+func updateConcurrencyLimitInDB(limit int16) error {
+	db := database.CreateDynamoDB()
+
+	requestLimitInput := &dynamodb.GetItemInput{
+		TableName: aws.String(requestLimitTableName),
+		Key: map[string]*dynamodb.AttributeValue{
+			"limitType": {
+				S: aws.String("pendingLimit"),
+			},
+		},
+	}
+
+	requestLimitResult, err := db.GetItem(requestLimitInput)
+	if err != nil {
+		log.Println(err, "is the error in request limit fetching")
+	}
+
+	requestLimitResponse := new(models.RequestLimit)
+	err = dynamodbattribute.UnmarshalMap(requestLimitResult.Item, requestLimitResponse)
+
+	if err != nil {
+		log.Println(err, "is the error")
+	}
+
+	requestLimitUpdateInput := models.RequestLimit{
+		LimitType:  requestLimitResponse.LimitType,
+		LimitValue: limit,
+	}
+
+	marshalledInput, err := dynamodbattribute.MarshalMap(requestLimitUpdateInput)
+	if err != nil {
+		log.Println("Error in marshalling the request")
+	}
+
+	putItemInput := &dynamodb.PutItemInput{
+		TableName: aws.String(requestLimitTableName),
+		Item:      marshalledInput,
+	}
+
+	_, err = db.PutItem(putItemInput)
+	if err != nil {
+		log.Println("Error in updating the request limit counters", err)
+		return nil
+	}
+	log.Println("The updated limit is ", requestLimitUpdateInput.LimitValue)
+	return nil
+}
+
+func main() {
+	lambda1.Start(handler)
+}

template.yaml

@@ -50,6 +50,23 @@ Resources:
             Path: /mark-concurrency-zero
             Method: PATCH
 
+  ResetLimitFunction:
+    Type: 'AWS::Serverless::Function'
+    Metadata:
+      BuildMethod: makefile
+    Properties:
+      CodeUri: resetLimitLambda/
+      Handler: bootstrap
+      Runtime: provided.al2
+      Architectures:
+        - x86_64  
+      Events:
+        CatchAll:
+          Type: Api
+          Properties:
+            Path: /reset-limit
+            Method: POST
+
   GetFeatureFlagFunction:
     Type: 'AWS::Serverless::Function'
     Metadata:

updateUserFeatureFlag/main.go

@@ -15,6 +15,7 @@ import (
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/awserr"
 	"github.com/aws/aws-sdk-go/service/dynamodb"
+	"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
 	"github.com/go-playground/validator/v10"
 )
 
@@ -29,7 +30,7 @@ func processUpdateByIds(userId string, flagId string, requestBody utils.UpdateFe
 	db := database.CreateDynamoDB()
 
 	utils.CheckRequestAllowed(db, utils.ConcurrencyDisablingLambda)
-	
+
 	input := &dynamodb.UpdateItemInput{
 		TableName: aws.String(utils.FEATURE_FLAG_USER_MAPPING_TABLE_NAME),
 		Key: map[string]*dynamodb.AttributeValue{