From 62ccd67cf57dee49d991e42ccad22c4ae1e89d31 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Fri, 24 Dec 2021 17:53:23 +0800
Subject: [PATCH 01/14] docs: update changelog

---
 docs/CHANGELOG.md | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 67354670..26a81198 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -4,12 +4,11 @@
 
 - feat: implement `transaction` mechanism for load test
 - feat: continue running next step when failure occurs with `--continue-on-failure` flag, default to failfast
-- feat: spawn workers with `--spawn-rate` flag
-- refactor: fork [boomer] as sub module
 - feat: report GA events with version
-- feat: run load test with the given limit and burst as rate limiter
+- feat: run load test with the given limit and burst as rate limiter, use `--spawn-count`, `--spawn-rate` and `--request-increase-rate` flag
+- feat: report runner state to prometheus
+- refactor: fork [boomer] as submodule initially and made a lot of changes
 - change: update API models
-- feat: report runner state
 
 ## v0.2.2 (2021-12-07)
 

From 4be765a15013142216524909d202be89e26e61d7 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Fri, 24 Dec 2021 18:44:54 +0800
Subject: [PATCH 02/14] change: update models

---
 boomer.go |  2 +-
 models.go |  8 ++++----
 runner.go | 24 ++++++++++++------------
 step.go   |  4 ++--
 4 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/boomer.go b/boomer.go
index fb8b5d71..9bd62475 100644
--- a/boomer.go
+++ b/boomer.go
@@ -107,7 +107,7 @@ func (b *hrpBoomer) convertBoomerTask(testcase *TestCase) *boomer.Task {
 			for name, transaction := range runner.transactions {
 				if len(transaction) == 1 {
 					// if transaction end time not exists, use testcase end time instead
-					duration := endTime.Sub(transaction[TransactionStart])
+					duration := endTime.Sub(transaction[transactionStart])
 					b.RecordTransaction(name, transactionSuccess, duration.Milliseconds(), 0)
 				}
 			}
diff --git a/models.go b/models.go
index cbaf4b4e..34924faf 100644
--- a/models.go
+++ b/models.go
@@ -69,16 +69,16 @@ const (
 	stepTypeRendezvous  stepType = "rendezvous"
 )
 
-type TransactionType string
+type transactionType string
 
 const (
-	TransactionStart TransactionType = "start"
-	TransactionEnd   TransactionType = "end"
+	transactionStart transactionType = "start"
+	transactionEnd   transactionType = "end"
 )
 
 type Transaction struct {
 	Name string          `json:"name" yaml:"name"`
-	Type TransactionType `json:"type" yaml:"type"`
+	Type transactionType `json:"type" yaml:"type"`
 }
 type Rendezvous struct {
 	Name    string  `json:"name" yaml:"name"`                           // required
diff --git a/runner.go b/runner.go
index 68782c91..04058590 100644
--- a/runner.go
+++ b/runner.go
@@ -43,7 +43,7 @@ func NewRunner(t *testing.T) *hrpRunner {
 			Timeout: 30 * time.Second,
 		},
 		sessionVariables: make(map[string]interface{}),
-		transactions:     make(map[string]map[TransactionType]time.Time),
+		transactions:     make(map[string]map[transactionType]time.Time),
 	}
 }
 
@@ -55,7 +55,7 @@ type hrpRunner struct {
 	sessionVariables map[string]interface{}
 	// transactions stores transaction timing info.
 	// key is transaction name, value is map of transaction type and time, e.g. start time and end time.
-	transactions map[string]map[TransactionType]time.Time
+	transactions map[string]map[transactionType]time.Time
 	startTime    time.Time // record start time of the testcase
 }
 
@@ -63,7 +63,7 @@ type hrpRunner struct {
 func (r *hrpRunner) Reset() *hrpRunner {
 	log.Info().Msg("[init] Reset session variables")
 	r.sessionVariables = make(map[string]interface{})
-	r.transactions = make(map[string]map[TransactionType]time.Time)
+	r.transactions = make(map[string]map[transactionType]time.Time)
 	r.startTime = time.Now()
 	return r
 }
@@ -234,25 +234,25 @@ func (r *hrpRunner) runStepTransaction(transaction *Transaction) (stepResult *st
 
 	// create transaction if not exists
 	if _, ok := r.transactions[transaction.Name]; !ok {
-		r.transactions[transaction.Name] = make(map[TransactionType]time.Time)
+		r.transactions[transaction.Name] = make(map[transactionType]time.Time)
 	}
 
 	// record transaction start time, override if already exists
-	if transaction.Type == TransactionStart {
-		r.transactions[transaction.Name][TransactionStart] = time.Now()
+	if transaction.Type == transactionStart {
+		r.transactions[transaction.Name][transactionStart] = time.Now()
 	}
 	// record transaction end time, override if already exists
-	if transaction.Type == TransactionEnd {
-		r.transactions[transaction.Name][TransactionEnd] = time.Now()
+	if transaction.Type == transactionEnd {
+		r.transactions[transaction.Name][transactionEnd] = time.Now()
 
 		// if transaction start time not exists, use testcase start time instead
-		if _, ok := r.transactions[transaction.Name][TransactionStart]; !ok {
-			r.transactions[transaction.Name][TransactionStart] = r.startTime
+		if _, ok := r.transactions[transaction.Name][transactionStart]; !ok {
+			r.transactions[transaction.Name][transactionStart] = r.startTime
 		}
 
 		// calculate transaction duration
-		duration := r.transactions[transaction.Name][TransactionEnd].Sub(
-			r.transactions[transaction.Name][TransactionStart])
+		duration := r.transactions[transaction.Name][transactionEnd].Sub(
+			r.transactions[transaction.Name][transactionStart])
 		stepResult.elapsed = duration.Milliseconds()
 		log.Info().Str("name", transaction.Name).Dur("elapsed", duration).Msg("transaction")
 	}
diff --git a/step.go b/step.go
index 4bfcc167..dc7b3bc3 100644
--- a/step.go
+++ b/step.go
@@ -178,7 +178,7 @@ func (s *StepRequest) CallRefCase(tc *TestCase) *StepTestCaseWithOptionalArgs {
 func (s *StepRequest) StartTransaction(name string) *StepTransaction {
 	s.step.Transaction = &Transaction{
 		Name: name,
-		Type: TransactionStart,
+		Type: transactionStart,
 	}
 	return &StepTransaction{
 		step: s.step,
@@ -189,7 +189,7 @@ func (s *StepRequest) StartTransaction(name string) *StepTransaction {
 func (s *StepRequest) EndTransaction(name string) *StepTransaction {
 	s.step.Transaction = &Transaction{
 		Name: name,
-		Type: TransactionEnd,
+		Type: transactionEnd,
 	}
 	return &StepTransaction{
 		step: s.step,

From 2068497d5316d8d676bc495ec667c84b0a2f9207 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Mon, 27 Dec 2021 14:52:39 +0800
Subject: [PATCH 03/14] feat: add banner in command

---
 hrp/cmd/root.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/hrp/cmd/root.go b/hrp/cmd/root.go
index 2f4d866d..63aa19f3 100644
--- a/hrp/cmd/root.go
+++ b/hrp/cmd/root.go
@@ -15,7 +15,16 @@ import (
 var RootCmd = &cobra.Command{
 	Use:   "hrp",
 	Short: "One-stop solution for HTTP(S) testing.",
-	Long: `hrp (HttpRunner+) aims to be a one-stop solution for HTTP(S) testing, covering API testing, load testing and digital experience monitoring (DEM). Enjoy! ✨ 🚀 ✨
+	Long: `
+██╗  ██╗████████╗████████╗██████╗ ██████╗ ██╗   ██╗███╗   ██╗███╗   ██╗███████╗██████╗
+██║  ██║╚══██╔══╝╚══██╔══╝██╔══██╗██╔══██╗██║   ██║████╗  ██║████╗  ██║██╔════╝██╔══██╗
+███████║   ██║      ██║   ██████╔╝██████╔╝██║   ██║██╔██╗ ██║██╔██╗ ██║█████╗  ██████╔╝
+██╔══██║   ██║      ██║   ██╔═══╝ ██╔══██╗██║   ██║██║╚██╗██║██║╚██╗██║██╔══╝  ██╔══██╗
+██║  ██║   ██║      ██║   ██║     ██║  ██║╚██████╔╝██║ ╚████║██║ ╚████║███████╗██║  ██║
+╚═╝  ╚═╝   ╚═╝      ╚═╝   ╚═╝     ╚═╝  ╚═╝ ╚═════╝ ╚═╝  ╚═══╝╚═╝  ╚═══╝╚══════╝╚═╝  ╚═╝
+
+hrp (HttpRunner+) aims to be a one-stop solution for HTTP(S) testing, covering API testing,
+load testing and digital experience monitoring (DEM). Enjoy! ✨ 🚀 ✨
 
 License: Apache-2.0
 Github: https://github.com/httprunner/hrp

From 398ef878947b5c52e94911636dba879e3ff1bf1a Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Mon, 27 Dec 2021 17:13:53 +0800
Subject: [PATCH 04/14] bump version to v0.4.0

---
 internal/version/init.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/version/init.go b/internal/version/init.go
index a29e664d..462025a5 100644
--- a/internal/version/init.go
+++ b/internal/version/init.go
@@ -1,3 +1,3 @@
 package version
 
-const VERSION = "v0.3.0"
+const VERSION = "v0.4.0"

From 9608e6a16b6e6c73a2997dfab64b42447d48941a Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Mon, 27 Dec 2021 17:16:15 +0800
Subject: [PATCH 05/14] refactor: move har2case to internal

---
 hrp/cmd/har2case.go                          | 2 +-
 {har2case => internal/har2case}/README.md    | 0
 {har2case => internal/har2case}/core.go      | 0
 {har2case => internal/har2case}/core_test.go | 0
 {har2case => internal/har2case}/har.go       | 0
 5 files changed, 1 insertion(+), 1 deletion(-)
 rename {har2case => internal/har2case}/README.md (100%)
 rename {har2case => internal/har2case}/core.go (100%)
 rename {har2case => internal/har2case}/core_test.go (100%)
 rename {har2case => internal/har2case}/har.go (100%)

diff --git a/hrp/cmd/har2case.go b/hrp/cmd/har2case.go
index 73670a57..7512f241 100644
--- a/hrp/cmd/har2case.go
+++ b/hrp/cmd/har2case.go
@@ -4,7 +4,7 @@ import (
 	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 
-	"github.com/httprunner/hrp/har2case"
+	"github.com/httprunner/hrp/internal/har2case"
 )
 
 // har2caseCmd represents the har2case command
diff --git a/har2case/README.md b/internal/har2case/README.md
similarity index 100%
rename from har2case/README.md
rename to internal/har2case/README.md
diff --git a/har2case/core.go b/internal/har2case/core.go
similarity index 100%
rename from har2case/core.go
rename to internal/har2case/core.go
diff --git a/har2case/core_test.go b/internal/har2case/core_test.go
similarity index 100%
rename from har2case/core_test.go
rename to internal/har2case/core_test.go
diff --git a/har2case/har.go b/internal/har2case/har.go
similarity index 100%
rename from har2case/har.go
rename to internal/har2case/har.go

From 6f3b49283954e8c4af73d5a0bc43a32d97bb573c Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Tue, 28 Dec 2021 15:22:54 +0800
Subject: [PATCH 06/14] change: add website url

---
 hrp/cmd/root.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hrp/cmd/root.go b/hrp/cmd/root.go
index 63aa19f3..db06388e 100644
--- a/hrp/cmd/root.go
+++ b/hrp/cmd/root.go
@@ -27,6 +27,7 @@ hrp (HttpRunner+) aims to be a one-stop solution for HTTP(S) testing, covering A
 load testing and digital experience monitoring (DEM). Enjoy! ✨ 🚀 ✨
 
 License: Apache-2.0
+Website: https://httprunner.com
 Github: https://github.com/httprunner/hrp
 Copyright 2021 debugtalk`,
 	PersistentPreRun: func(cmd *cobra.Command, args []string) {

From 49829a6fc7dc277ce6808d80abd1eb0920cfd304 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Tue, 28 Dec 2021 17:40:55 +0800
Subject: [PATCH 07/14] refactor: run testcase with case runner

---
 boomer.go                      | 10 ++--
 docs/cmd/hrp.md                | 14 ++++-
 docs/cmd/hrp_boom.md           |  2 +-
 docs/cmd/hrp_har2case.md       |  2 +-
 docs/cmd/hrp_run.md            |  2 +-
 internal/har2case/core_test.go |  4 +-
 runner.go                      | 94 ++++++++++++++++++++--------------
 step_test.go                   | 11 ++--
 8 files changed, 84 insertions(+), 55 deletions(-)

diff --git a/boomer.go b/boomer.go
index 9bd62475..5719069c 100644
--- a/boomer.go
+++ b/boomer.go
@@ -52,19 +52,19 @@ func (b *hrpBoomer) Run(testcases ...ITestCase) {
 }
 
 func (b *hrpBoomer) convertBoomerTask(testcase *TestCase) *boomer.Task {
+	hrpRunner := NewRunner(nil).SetDebug(b.debug)
+	runner := hrpRunner.newCaseRunner(testcase)
 	config := testcase.Config.ToStruct()
 	return &boomer.Task{
 		Name:   config.Name,
 		Weight: config.Weight,
 		Fn: func() {
-			runner := NewRunner(nil).SetDebug(b.debug).Reset()
-
 			testcaseSuccess := true       // flag whole testcase result
 			var transactionSuccess = true // flag current transaction result
 
 			startTime := time.Now()
-			for _, step := range testcase.TestSteps {
-				stepData, err := runner.runStep(step, testcase.Config)
+			for index, step := range testcase.TestSteps {
+				stepData, err := runner.runStep(index)
 				if err != nil {
 					// step failed
 					var elapsed int64
@@ -77,7 +77,7 @@ func (b *hrpBoomer) convertBoomerTask(testcase *TestCase) *boomer.Task {
 					testcaseSuccess = false
 					transactionSuccess = false
 
-					if runner.failfast {
+					if runner.hrpRunner.failfast {
 						log.Error().Err(err).Msg("abort running due to failfast setting")
 						break
 					}
diff --git a/docs/cmd/hrp.md b/docs/cmd/hrp.md
index b2067d4a..b081b919 100644
--- a/docs/cmd/hrp.md
+++ b/docs/cmd/hrp.md
@@ -4,9 +4,19 @@ One-stop solution for HTTP(S) testing.
 
 ### Synopsis
 
-hrp (HttpRunner+) aims to be a one-stop solution for HTTP(S) testing, covering API testing, load testing and digital experience monitoring (DEM). Enjoy! ✨ 🚀 ✨
+
+██╗  ██╗████████╗████████╗██████╗ ██████╗ ██╗   ██╗███╗   ██╗███╗   ██╗███████╗██████╗
+██║  ██║╚══██╔══╝╚══██╔══╝██╔══██╗██╔══██╗██║   ██║████╗  ██║████╗  ██║██╔════╝██╔══██╗
+███████║   ██║      ██║   ██████╔╝██████╔╝██║   ██║██╔██╗ ██║██╔██╗ ██║█████╗  ██████╔╝
+██╔══██║   ██║      ██║   ██╔═══╝ ██╔══██╗██║   ██║██║╚██╗██║██║╚██╗██║██╔══╝  ██╔══██╗
+██║  ██║   ██║      ██║   ██║     ██║  ██║╚██████╔╝██║ ╚████║██║ ╚████║███████╗██║  ██║
+╚═╝  ╚═╝   ╚═╝      ╚═╝   ╚═╝     ╚═╝  ╚═╝ ╚═════╝ ╚═╝  ╚═══╝╚═╝  ╚═══╝╚══════╝╚═╝  ╚═╝
+
+hrp (HttpRunner+) aims to be a one-stop solution for HTTP(S) testing, covering API testing,
+load testing and digital experience monitoring (DEM). Enjoy! ✨ 🚀 ✨
 
 License: Apache-2.0
+Website: https://httprunner.com
 Github: https://github.com/httprunner/hrp
 Copyright 2021 debugtalk
 
@@ -22,4 +32,4 @@ Copyright 2021 debugtalk
 * [hrp har2case](hrp_har2case.md)	 - Convert HAR to json/yaml testcase files
 * [hrp run](hrp_run.md)	 - run API test
 
-###### Auto generated by spf13/cobra on 24-Dec-2021
+###### Auto generated by spf13/cobra on 28-Dec-2021
diff --git a/docs/cmd/hrp_boom.md b/docs/cmd/hrp_boom.md
index c5a65c42..c707dacf 100644
--- a/docs/cmd/hrp_boom.md
+++ b/docs/cmd/hrp_boom.md
@@ -38,4 +38,4 @@ hrp boom [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 24-Dec-2021
+###### Auto generated by spf13/cobra on 28-Dec-2021
diff --git a/docs/cmd/hrp_har2case.md b/docs/cmd/hrp_har2case.md
index 8e559e4b..76921935 100644
--- a/docs/cmd/hrp_har2case.md
+++ b/docs/cmd/hrp_har2case.md
@@ -23,4 +23,4 @@ hrp har2case harPath... [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 24-Dec-2021
+###### Auto generated by spf13/cobra on 28-Dec-2021
diff --git a/docs/cmd/hrp_run.md b/docs/cmd/hrp_run.md
index 96cd3590..f4ab234b 100644
--- a/docs/cmd/hrp_run.md
+++ b/docs/cmd/hrp_run.md
@@ -31,4 +31,4 @@ hrp run path... [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 24-Dec-2021
+###### Auto generated by spf13/cobra on 28-Dec-2021
diff --git a/internal/har2case/core_test.go b/internal/har2case/core_test.go
index 43118e58..0e17cfe2 100644
--- a/internal/har2case/core_test.go
+++ b/internal/har2case/core_test.go
@@ -7,8 +7,8 @@ import (
 )
 
 var (
-	harPath  = "../examples/har/demo.har"
-	harPath2 = "../examples/har/postman-echo.har"
+	harPath  = "../../examples/har/demo.har"
+	harPath2 = "../../examples/har/postman-echo.har"
 )
 
 func TestGenJSON(t *testing.T) {
diff --git a/runner.go b/runner.go
index 04058590..bca1900b 100644
--- a/runner.go
+++ b/runner.go
@@ -42,30 +42,14 @@ func NewRunner(t *testing.T) *hrpRunner {
 			},
 			Timeout: 30 * time.Second,
 		},
-		sessionVariables: make(map[string]interface{}),
-		transactions:     make(map[string]map[transactionType]time.Time),
 	}
 }
 
 type hrpRunner struct {
-	t                *testing.T
-	failfast         bool
-	debug            bool
-	client           *http.Client
-	sessionVariables map[string]interface{}
-	// transactions stores transaction timing info.
-	// key is transaction name, value is map of transaction type and time, e.g. start time and end time.
-	transactions map[string]map[transactionType]time.Time
-	startTime    time.Time // record start time of the testcase
-}
-
-// Reset clears runner session variables.
-func (r *hrpRunner) Reset() *hrpRunner {
-	log.Info().Msg("[init] Reset session variables")
-	r.sessionVariables = make(map[string]interface{})
-	r.transactions = make(map[string]map[transactionType]time.Time)
-	r.startTime = time.Now()
-	return r
+	t        *testing.T
+	failfast bool
+	debug    bool
+	client   *http.Client
 }
 
 // SetFailfast configures whether to stop running when one step fails.
@@ -108,14 +92,13 @@ func (r *hrpRunner) Run(testcases ...ITestCase) error {
 	// report execution timing event
 	defer ga.SendEvent(event.StartTiming("execution"))
 
-	r.Reset()
 	for _, iTestCase := range testcases {
 		testcase, err := iTestCase.ToTestCase()
 		if err != nil {
 			log.Error().Err(err).Msg("[Run] convert ITestCase interface to TestCase struct failed")
 			return err
 		}
-		if err := r.runCase(testcase); err != nil {
+		if err := r.newCaseRunner(testcase).run(); err != nil {
 			log.Error().Err(err).Msg("[Run] run testcase failed")
 			return err
 		}
@@ -123,18 +106,48 @@ func (r *hrpRunner) Run(testcases ...ITestCase) error {
 	return nil
 }
 
-func (r *hrpRunner) runCase(testcase *TestCase) error {
-	config := testcase.Config
+func (r *hrpRunner) newCaseRunner(testcase *TestCase) *caseRunner {
+	caseRunner := &caseRunner{
+		TestCase:  testcase,
+		hrpRunner: r,
+	}
+	caseRunner.reset()
+	return caseRunner
+}
+
+// caseRunner is used to run testcase and its steps.
+// each testcase has its own caseRunner instance and share session variables.
+type caseRunner struct {
+	*TestCase
+	hrpRunner        *hrpRunner
+	sessionVariables map[string]interface{}
+	// transactions stores transaction timing info.
+	// key is transaction name, value is map of transaction type and time, e.g. start time and end time.
+	transactions map[string]map[transactionType]time.Time
+	startTime    time.Time // record start time of the testcase
+}
+
+// reset clears runner session variables.
+func (r *caseRunner) reset() *caseRunner {
+	log.Info().Msg("[init] Reset session variables")
+	r.sessionVariables = make(map[string]interface{})
+	r.transactions = make(map[string]map[transactionType]time.Time)
+	r.startTime = time.Now()
+	return r
+}
+
+func (r *caseRunner) run() error {
+	config := r.TestCase.Config
 	if err := r.parseConfig(config); err != nil {
 		return err
 	}
 
 	log.Info().Str("testcase", config.Name()).Msg("run testcase start")
 	r.startTime = time.Now()
-	for _, step := range testcase.TestSteps {
-		_, err := r.runStep(step, config)
+	for index := range r.TestCase.TestSteps {
+		_, err := r.runStep(index)
 		if err != nil {
-			if r.failfast {
+			if r.hrpRunner.failfast {
 				log.Error().Err(err).Msg("abort running due to failfast setting")
 				return err
 			}
@@ -146,7 +159,10 @@ func (r *hrpRunner) runCase(testcase *TestCase) error {
 	return nil
 }
 
-func (r *hrpRunner) runStep(step IStep, config IConfig) (stepResult *stepData, err error) {
+func (r *caseRunner) runStep(index int) (stepResult *stepData, err error) {
+	config := r.TestCase.Config
+	step := r.TestCase.TestSteps[index]
+
 	// step type priority order: transaction > rendezvous > testcase > request
 	if stepTran, ok := step.(*StepTransaction); ok {
 		// transaction step
@@ -218,7 +234,7 @@ func (r *hrpRunner) runStep(step IStep, config IConfig) (stepResult *stepData, e
 	return stepResult, nil
 }
 
-func (r *hrpRunner) runStepTransaction(transaction *Transaction) (stepResult *stepData, err error) {
+func (r *caseRunner) runStepTransaction(transaction *Transaction) (stepResult *stepData, err error) {
 	log.Info().
 		Str("name", transaction.Name).
 		Str("type", string(transaction.Type)).
@@ -260,7 +276,7 @@ func (r *hrpRunner) runStepTransaction(transaction *Transaction) (stepResult *st
 	return stepResult, nil
 }
 
-func (r *hrpRunner) runStepRendezvous(rend *Rendezvous) (stepResult *stepData, err error) {
+func (r *caseRunner) runStepRendezvous(rend *Rendezvous) (stepResult *stepData, err error) {
 	log.Info().
 		Str("name", rend.Name).
 		Float32("percent", rend.Percent).
@@ -275,7 +291,7 @@ func (r *hrpRunner) runStepRendezvous(rend *Rendezvous) (stepResult *stepData, e
 	return stepResult, nil
 }
 
-func (r *hrpRunner) runStepRequest(step *TStep) (stepResult *stepData, err error) {
+func (r *caseRunner) runStepRequest(step *TStep) (stepResult *stepData, err error) {
 	stepResult = &stepData{
 		name:        step.Name,
 		stepType:    stepTypeRequest,
@@ -388,7 +404,7 @@ func (r *hrpRunner) runStepRequest(step *TStep) (stepResult *stepData, err error
 	req.Host = u.Host
 
 	// log & print request
-	if r.debug {
+	if r.hrpRunner.debug {
 		reqDump, err := httputil.DumpRequest(req, true)
 		if err != nil {
 			return nil, errors.Wrap(err, "dump request failed")
@@ -399,7 +415,7 @@ func (r *hrpRunner) runStepRequest(step *TStep) (stepResult *stepData, err error
 
 	// do request action
 	start := time.Now()
-	resp, err := r.client.Do(req)
+	resp, err := r.hrpRunner.client.Do(req)
 	stepResult.elapsed = time.Since(start).Milliseconds()
 	if err != nil {
 		return nil, errors.Wrap(err, "do request failed")
@@ -407,7 +423,7 @@ func (r *hrpRunner) runStepRequest(step *TStep) (stepResult *stepData, err error
 	defer resp.Body.Close()
 
 	// log & print response
-	if r.debug {
+	if r.hrpRunner.debug {
 		fmt.Println("==================== response ===================")
 		respDump, err := httputil.DumpResponse(resp, true)
 		if err != nil {
@@ -418,7 +434,7 @@ func (r *hrpRunner) runStepRequest(step *TStep) (stepResult *stepData, err error
 	}
 
 	// new response object
-	respObj, err := newResponseObject(r.t, resp)
+	respObj, err := newResponseObject(r.hrpRunner.t, resp)
 	if err != nil {
 		err = errors.Wrap(err, "init ResponseObject error")
 		return
@@ -443,7 +459,7 @@ func (r *hrpRunner) runStepRequest(step *TStep) (stepResult *stepData, err error
 	return stepResult, nil
 }
 
-func (r *hrpRunner) runStepTestCase(step *TStep) (stepResult *stepData, err error) {
+func (r *caseRunner) runStepTestCase(step *TStep) (stepResult *stepData, err error) {
 	stepResult = &stepData{
 		name:     step.Name,
 		stepType: stepTypeTestCase,
@@ -451,7 +467,7 @@ func (r *hrpRunner) runStepTestCase(step *TStep) (stepResult *stepData, err erro
 	}
 	testcase := step.TestCase
 	start := time.Now()
-	err = r.runCase(testcase)
+	err = r.hrpRunner.newCaseRunner(testcase).run()
 	stepResult.elapsed = time.Since(start).Milliseconds()
 	if err != nil {
 		return stepResult, err
@@ -460,7 +476,7 @@ func (r *hrpRunner) runStepTestCase(step *TStep) (stepResult *stepData, err erro
 	return stepResult, nil
 }
 
-func (r *hrpRunner) parseConfig(config IConfig) error {
+func (r *caseRunner) parseConfig(config IConfig) error {
 	cfg := config.ToStruct()
 	// parse config variables
 	parsedVariables, err := parseVariables(cfg.Variables)
@@ -487,7 +503,7 @@ func (r *hrpRunner) parseConfig(config IConfig) error {
 	return nil
 }
 
-func (r *hrpRunner) getSummary() *testCaseSummary {
+func (r *caseRunner) getSummary() *testCaseSummary {
 	return &testCaseSummary{}
 }
 
diff --git a/step_test.go b/step_test.go
index 38a91abe..5fdd3c02 100644
--- a/step_test.go
+++ b/step_test.go
@@ -74,12 +74,15 @@ func TestRunRequestPostDataToStruct(t *testing.T) {
 }
 
 func TestRunRequestRun(t *testing.T) {
-	config := NewConfig("test").SetBaseURL("https://postman-echo.com")
-	runner := NewRunner(t).SetDebug(true)
-	if _, err := runner.runStep(stepGET, config); err != nil {
+	testcase := &TestCase{
+		Config:    NewConfig("test").SetBaseURL("https://postman-echo.com"),
+		TestSteps: []IStep{stepGET, stepPOSTData},
+	}
+	runner := NewRunner(t).SetDebug(true).newCaseRunner(testcase)
+	if _, err := runner.runStep(0); err != nil {
 		t.Fatalf("tStep.Run() error: %s", err)
 	}
-	if _, err := runner.runStep(stepPOSTData, config); err != nil {
+	if _, err := runner.runStep(1); err != nil {
 		t.Fatalf("tStepPOSTData.Run() error: %s", err)
 	}
 }

From 3b49d7a5fc19103346cc3dc87e5ec275aea7c73e Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 11:52:07 +0800
Subject: [PATCH 08/14] revert license

---
 LICENSE                  | 862 +++++++++------------------------------
 docs/cmd/hrp.md          |   2 +-
 docs/cmd/hrp_boom.md     |   2 +-
 docs/cmd/hrp_har2case.md |   2 +-
 docs/cmd/hrp_run.md      |   2 +-
 5 files changed, 205 insertions(+), 665 deletions(-)

diff --git a/LICENSE b/LICENSE
index 0815c492..186ade81 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,661 +1,201 @@
-                    GNU AFFERO GENERAL PUBLIC LICENSE
-                       Version 3, 19 November 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The GNU Affero General Public License is a free, copyleft license for
-software and other kinds of works, specifically designed to ensure
-cooperation with the community in the case of network server software.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-our General Public Licenses are intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  Developers that use our General Public Licenses protect your rights
-with two steps: (1) assert copyright on the software, and (2) offer
-you this License which gives you legal permission to copy, distribute
-and/or modify the software.
-
-  A secondary benefit of defending all users' freedom is that
-improvements made in alternate versions of the program, if they
-receive widespread use, become available for other developers to
-incorporate.  Many developers of free software are heartened and
-encouraged by the resulting cooperation.  However, in the case of
-software used on network servers, this result may fail to come about.
-The GNU General Public License permits making a modified version and
-letting the public access it on a server without ever releasing its
-source code to the public.
-
-  The GNU Affero General Public License is designed specifically to
-ensure that, in such cases, the modified source code becomes available
-to the community.  It requires the operator of a network server to
-provide the source code of the modified version running there to the
-users of that server.  Therefore, public use of a modified version, on
-a publicly accessible server, gives the public access to the source
-code of the modified version.
-
-  An older license, called the Affero General Public License and
-published by Affero, was designed to accomplish similar goals.  This is
-a different license, not a version of the Affero GPL, but Affero has
-released a new version of the Affero GPL which permits relicensing under
-this license.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
-
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-
-  "This License" refers to version 3 of the GNU Affero General Public License.
-
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-works, such as semiconductor masks.
-
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
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+      the terms of any separate license agreement you may have executed
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+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
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+
+   Copyright 2021 debugtalk
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/docs/cmd/hrp.md b/docs/cmd/hrp.md
index b081b919..8b751a2d 100644
--- a/docs/cmd/hrp.md
+++ b/docs/cmd/hrp.md
@@ -32,4 +32,4 @@ Copyright 2021 debugtalk
 * [hrp har2case](hrp_har2case.md)	 - Convert HAR to json/yaml testcase files
 * [hrp run](hrp_run.md)	 - run API test
 
-###### Auto generated by spf13/cobra on 28-Dec-2021
+###### Auto generated by spf13/cobra on 30-Dec-2021
diff --git a/docs/cmd/hrp_boom.md b/docs/cmd/hrp_boom.md
index c707dacf..494ae8d6 100644
--- a/docs/cmd/hrp_boom.md
+++ b/docs/cmd/hrp_boom.md
@@ -38,4 +38,4 @@ hrp boom [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 28-Dec-2021
+###### Auto generated by spf13/cobra on 30-Dec-2021
diff --git a/docs/cmd/hrp_har2case.md b/docs/cmd/hrp_har2case.md
index 76921935..d9664517 100644
--- a/docs/cmd/hrp_har2case.md
+++ b/docs/cmd/hrp_har2case.md
@@ -23,4 +23,4 @@ hrp har2case harPath... [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 28-Dec-2021
+###### Auto generated by spf13/cobra on 30-Dec-2021
diff --git a/docs/cmd/hrp_run.md b/docs/cmd/hrp_run.md
index f4ab234b..9cb28dbf 100644
--- a/docs/cmd/hrp_run.md
+++ b/docs/cmd/hrp_run.md
@@ -31,4 +31,4 @@ hrp run path... [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 28-Dec-2021
+###### Auto generated by spf13/cobra on 30-Dec-2021

From 345f8c0038d2a3d46d4940a79abe77a584b6ba37 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 13:14:57 +0800
Subject: [PATCH 09/14] fix: concurrent map writes in load testing

---
 boomer.go         | 3 ++-
 docs/CHANGELOG.md | 6 +++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/boomer.go b/boomer.go
index 5719069c..7d02078d 100644
--- a/boomer.go
+++ b/boomer.go
@@ -53,12 +53,13 @@ func (b *hrpBoomer) Run(testcases ...ITestCase) {
 
 func (b *hrpBoomer) convertBoomerTask(testcase *TestCase) *boomer.Task {
 	hrpRunner := NewRunner(nil).SetDebug(b.debug)
-	runner := hrpRunner.newCaseRunner(testcase)
 	config := testcase.Config.ToStruct()
 	return &boomer.Task{
 		Name:   config.Name,
 		Weight: config.Weight,
 		Fn: func() {
+			runner := hrpRunner.newCaseRunner(testcase)
+
 			testcaseSuccess := true       // flag whole testcase result
 			var transactionSuccess = true // flag current transaction result
 
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 26a81198..9b970960 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,6 +1,10 @@
 # Release History
 
-## v0.3.0 (2021-12-22)
+## v0.4.0 (2021-12-30)
+
+- fix: concurrent map writes in load testing
+
+## v0.3.0 (2021-12-24)
 
 - feat: implement `transaction` mechanism for load test
 - feat: continue running next step when failure occurs with `--continue-on-failure` flag, default to failfast

From dbcb7f731a13c213fad01529cba4dc6c395254c7 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 13:37:02 +0800
Subject: [PATCH 10/14] change: remove duplicate error logging

---
 boomer.go | 2 +-
 runner.go | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/boomer.go b/boomer.go
index 7d02078d..eda4a4f2 100644
--- a/boomer.go
+++ b/boomer.go
@@ -79,7 +79,7 @@ func (b *hrpBoomer) convertBoomerTask(testcase *TestCase) *boomer.Task {
 					transactionSuccess = false
 
 					if runner.hrpRunner.failfast {
-						log.Error().Err(err).Msg("abort running due to failfast setting")
+						log.Error().Msg("abort running due to failfast setting")
 						break
 					}
 					log.Warn().Err(err).Msg("run step failed, continue next step")
diff --git a/runner.go b/runner.go
index bca1900b..a1b9d108 100644
--- a/runner.go
+++ b/runner.go
@@ -148,8 +148,7 @@ func (r *caseRunner) run() error {
 		_, err := r.runStep(index)
 		if err != nil {
 			if r.hrpRunner.failfast {
-				log.Error().Err(err).Msg("abort running due to failfast setting")
-				return err
+				return errors.Wrap(err, "abort running due to failfast setting")
 			}
 			log.Warn().Err(err).Msg("run step failed, continue next step")
 		}

From 52d43861f357365d862c1547d6fa96eea6549886 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 15:48:17 +0800
Subject: [PATCH 11/14] feat: set ulimit to 10240 before load testing

---
 docs/CHANGELOG.md |  1 +
 hrp/cmd/boom.go   | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 9b970960..b6ea98a4 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## v0.4.0 (2021-12-30)
 
+- feat: set ulimit to 10240 before load testing
 - fix: concurrent map writes in load testing
 
 ## v0.3.0 (2021-12-24)
diff --git a/hrp/cmd/boom.go b/hrp/cmd/boom.go
index 41c67758..0bbc25c6 100644
--- a/hrp/cmd/boom.go
+++ b/hrp/cmd/boom.go
@@ -1,8 +1,10 @@
 package cmd
 
 import (
+	"syscall"
 	"time"
 
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 
 	"github.com/httprunner/hrp"
@@ -19,6 +21,7 @@ var boomCmd = &cobra.Command{
   $ hrp boom examples/	# run testcases in specified folder`,
 	Args: cobra.MinimumNArgs(1),
 	PreRun: func(cmd *cobra.Command, args []string) {
+		setUlimit()
 		setLogLevel("WARN") // disable info logs for load testing
 	},
 	Run: func(cmd *cobra.Command, args []string) {
@@ -67,3 +70,26 @@ func init() {
 	boomCmd.Flags().StringVar(&prometheusPushgatewayURL, "prometheus-gateway", "", "Prometheus Pushgateway url.")
 	boomCmd.Flags().BoolVar(&disableConsoleOutput, "disable-console-output", false, "Disable console output.")
 }
+
+// set resource limit
+// ulimit -n 10240
+func setUlimit() {
+	var rLimit syscall.Rlimit
+	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+	if err != nil {
+		log.Error().Err(err).Msg("get ulimit failed")
+		return
+	}
+	log.Info().Uint64("limit", rLimit.Cur).Msg("get current ulimit")
+	if rLimit.Cur >= 10240 {
+		return
+	}
+
+	rLimit.Cur = 10240
+	log.Info().Uint64("limit", rLimit.Cur).Msg("set current ulimit")
+	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+	if err != nil {
+		log.Error().Err(err).Msg("set ulimit failed")
+		return
+	}
+}

From 3f709b4d71b43a25b532342e56e0321aa49436f8 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 16:22:08 +0800
Subject: [PATCH 12/14] change: skip setting ulimit for windows

---
 docs/CHANGELOG.md | 2 +-
 hrp/cmd/boom.go   | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index b6ea98a4..4f2f8207 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Release History
 
-## v0.4.0 (2021-12-30)
+## v0.3.1 (2021-12-30)
 
 - feat: set ulimit to 10240 before load testing
 - fix: concurrent map writes in load testing
diff --git a/hrp/cmd/boom.go b/hrp/cmd/boom.go
index 0bbc25c6..ff3cb472 100644
--- a/hrp/cmd/boom.go
+++ b/hrp/cmd/boom.go
@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"runtime"
 	"syscall"
 	"time"
 
@@ -74,6 +75,10 @@ func init() {
 // set resource limit
 // ulimit -n 10240
 func setUlimit() {
+	if runtime.GOOS == "windows" {
+		log.Warn().Msg("windows does not support setting ulimit")
+		return
+	}
 	var rLimit syscall.Rlimit
 	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
 	if err != nil {

From 2c69966c2f6ae1034ea856a93ff8cfcecf33495e Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 16:30:58 +0800
Subject: [PATCH 13/14] change: add debug log

---
 hrp/cmd/boom.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hrp/cmd/boom.go b/hrp/cmd/boom.go
index ff3cb472..7cd14b07 100644
--- a/hrp/cmd/boom.go
+++ b/hrp/cmd/boom.go
@@ -75,6 +75,7 @@ func init() {
 // set resource limit
 // ulimit -n 10240
 func setUlimit() {
+	log.Info().Str("runtime.GOOS", runtime.GOOS).Msg("check GOOS")
 	if runtime.GOOS == "windows" {
 		log.Warn().Msg("windows does not support setting ulimit")
 		return

From 025e84ff8130e9256fdd8fc6c6b39f6e97ee40e7 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Thu, 30 Dec 2021 16:40:04 +0800
Subject: [PATCH 14/14] fix: skip set ulimit on windows

---
 hrp/cmd/boom.go                   | 35 ++-----------------------------
 internal/boomer/ulimit.go         | 32 ++++++++++++++++++++++++++++
 internal/boomer/ulimit_windows.go | 12 +++++++++++
 3 files changed, 46 insertions(+), 33 deletions(-)
 create mode 100644 internal/boomer/ulimit.go
 create mode 100644 internal/boomer/ulimit_windows.go

diff --git a/hrp/cmd/boom.go b/hrp/cmd/boom.go
index 7cd14b07..b19c239a 100644
--- a/hrp/cmd/boom.go
+++ b/hrp/cmd/boom.go
@@ -1,11 +1,8 @@
 package cmd
 
 import (
-	"runtime"
-	"syscall"
 	"time"
 
-	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 
 	"github.com/httprunner/hrp"
@@ -22,8 +19,8 @@ var boomCmd = &cobra.Command{
   $ hrp boom examples/	# run testcases in specified folder`,
 	Args: cobra.MinimumNArgs(1),
 	PreRun: func(cmd *cobra.Command, args []string) {
-		setUlimit()
-		setLogLevel("WARN") // disable info logs for load testing
+		boomer.SetUlimit(10240) // ulimit -n 10240
+		setLogLevel("WARN")     // disable info logs for load testing
 	},
 	Run: func(cmd *cobra.Command, args []string) {
 		var paths []hrp.ITestCase
@@ -71,31 +68,3 @@ func init() {
 	boomCmd.Flags().StringVar(&prometheusPushgatewayURL, "prometheus-gateway", "", "Prometheus Pushgateway url.")
 	boomCmd.Flags().BoolVar(&disableConsoleOutput, "disable-console-output", false, "Disable console output.")
 }
-
-// set resource limit
-// ulimit -n 10240
-func setUlimit() {
-	log.Info().Str("runtime.GOOS", runtime.GOOS).Msg("check GOOS")
-	if runtime.GOOS == "windows" {
-		log.Warn().Msg("windows does not support setting ulimit")
-		return
-	}
-	var rLimit syscall.Rlimit
-	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
-	if err != nil {
-		log.Error().Err(err).Msg("get ulimit failed")
-		return
-	}
-	log.Info().Uint64("limit", rLimit.Cur).Msg("get current ulimit")
-	if rLimit.Cur >= 10240 {
-		return
-	}
-
-	rLimit.Cur = 10240
-	log.Info().Uint64("limit", rLimit.Cur).Msg("set current ulimit")
-	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
-	if err != nil {
-		log.Error().Err(err).Msg("set ulimit failed")
-		return
-	}
-}
diff --git a/internal/boomer/ulimit.go b/internal/boomer/ulimit.go
new file mode 100644
index 00000000..b83585ea
--- /dev/null
+++ b/internal/boomer/ulimit.go
@@ -0,0 +1,32 @@
+// +build !windows
+
+package boomer
+
+import (
+	"syscall"
+
+	"github.com/rs/zerolog/log"
+)
+
+// set resource limit
+// ulimit -n 10240
+func SetUlimit(limit uint64) {
+	var rLimit syscall.Rlimit
+	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+	if err != nil {
+		log.Error().Err(err).Msg("get ulimit failed")
+		return
+	}
+	log.Info().Uint64("limit", rLimit.Cur).Msg("get current ulimit")
+	if rLimit.Cur >= limit {
+		return
+	}
+
+	rLimit.Cur = limit
+	log.Info().Uint64("limit", rLimit.Cur).Msg("set current ulimit")
+	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+	if err != nil {
+		log.Error().Err(err).Msg("set ulimit failed")
+		return
+	}
+}
diff --git a/internal/boomer/ulimit_windows.go b/internal/boomer/ulimit_windows.go
new file mode 100644
index 00000000..76ca69fc
--- /dev/null
+++ b/internal/boomer/ulimit_windows.go
@@ -0,0 +1,12 @@
+// +build windows
+
+package boomer
+
+import (
+	"github.com/rs/zerolog/log"
+)
+
+// set resource limit
+func SetUlimit(limit uint64) {
+	log.Warn().Msg("windows does not support setting ulimit")
+}