Feature: ExecuteLimit Support

README.md

@@ -34,13 +34,12 @@ Finished List:
 - Dynamic Configure Center & Service Management Configurator: Zookeeper
 - Cluster Strategy: Failover/[Failfast](https://github.com/apache/dubbo-go/pull/140)/[Failsafe/Failback](https://github.com/apache/dubbo-go/pull/136)/[Available](https://github.com/apache/dubbo-go/pull/155)/[Broadcast](https://github.com/apache/dubbo-go/pull/158)/[Forking](https://github.com/apache/dubbo-go/pull/161)
 - Load Balance: Random/[RoundRobin](https://github.com/apache/dubbo-go/pull/66)/[LeastActive](https://github.com/apache/dubbo-go/pull/65)
-- Filter: Echo Health Check/[Circuit break and service downgrade](https://github.com/apache/dubbo-go/pull/133)/[TokenFilter](https://github.com/apache/dubbo-go/pull/202)/[AccessLogFilter](https://github.com/apache/dubbo-go/pull/214)/[TpsLimitFilter](https://github.com/apache/dubbo-go/pull/237)
+- Filter: Echo Health Check/[Circuit break and service downgrade](https://github.com/apache/dubbo-go/pull/133)/[TokenFilter](https://github.com/apache/dubbo-go/pull/202)/[AccessLogFilter](https://github.com/apache/dubbo-go/pull/214)/[TpsLimitFilter](https://github.com/apache/dubbo-go/pull/237)/[ExecuteLimitFilter](https://github.com/apache/dubbo-go/pull/246)
 - Other feature: [generic invoke](https://github.com/apache/dubbo-go/pull/122)/start check/connecting certain provider/multi-protocols/multi-registries/multi-versions/service group
 
 Working List:
 
 - Load Balance: ConsistentHash
-- Filter: CountFilter/ExecuteLimitFilter
 - Registry: k8s
 - Configure Center: apollo
 - Metadata Center (dubbo v2.7.x)

README_CN.md

@@ -33,14 +33,13 @@ Apache License, Version 2.0
 - 动态配置中心与服务治理配置器（config center）: Zookeeper
 - 集群策略: Failover/[Failfast](https://github.com/apache/dubbo-go/pull/140)/[Failsafe/Failback](https://github.com/apache/dubbo-go/pull/136)/[Available](https://github.com/apache/dubbo-go/pull/155)/[Broadcast](https://github.com/apache/dubbo-go/pull/158)/[Forking](https://github.com/apache/dubbo-go/pull/161)
 - 负载均衡策略: Random/[RoundRobin](https://github.com/apache/dubbo-go/pull/66)/[LeastActive](https://github.com/apache/dubbo-go/pull/65)
-- 过滤器: Echo Health Check/[服务熔断&降级](https://github.com/apache/dubbo-go/pull/133)/[TokenFilter](https://github.com/apache/dubbo-go/pull/202)/[AccessLogFilter](https://github.com/apache/dubbo-go/pull/214)/[TpsLimitFilter](https://github.com/apache/dubbo-go/pull/237)
+- 过滤器: Echo Health Check/[服务熔断&降级](https://github.com/apache/dubbo-go/pull/133)/[TokenFilter](https://github.com/apache/dubbo-go/pull/202)/[AccessLogFilter](https://github.com/apache/dubbo-go/pull/214)/[TpsLimitFilter](https://github.com/apache/dubbo-go/pull/237)[ExecuteLimitFilter](https://github.com/apache/dubbo-go/pull/246)
 - 其他功能支持: [泛化调用](https://github.com/apache/dubbo-go/pull/122)/启动时检查/服务直连/多服务协议/多注册中心/多服务版本/服务分组
 
 开发中列表:
 
 - 集群策略: Forking
 - 负载均衡策略: ConsistentHash
-- 过滤器: CountFilter/ExecuteLimitFilter
 - 注册中心: k8s
 - 配置中心: apollo
 - 元数据中心 (dubbo v2.7.x)

common/constant/default.go

@@ -46,7 +46,7 @@ const (
 const (
 	DEFAULT_KEY               = "default"
 	PREFIX_DEFAULT_KEY        = "default."
-	DEFAULT_SERVICE_FILTERS   = "echo,token,accesslog,tps"
+	DEFAULT_SERVICE_FILTERS   = "echo,token,accesslog,tps,execute"
 	DEFAULT_REFERENCE_FILTERS = ""
 	GENERIC_REFERENCE_FILTERS = "generic"
 	GENERIC                   = "$invoke"

common/constant/key.go

@@ -48,26 +48,29 @@ const (
 )
 
 const (
-	TIMESTAMP_KEY                      = "timestamp"
-	REMOTE_TIMESTAMP_KEY               = "remote.timestamp"
-	CLUSTER_KEY                        = "cluster"
-	LOADBALANCE_KEY                    = "loadbalance"
-	WEIGHT_KEY                         = "weight"
-	WARMUP_KEY                         = "warmup"
-	RETRIES_KEY                        = "retries"
-	BEAN_NAME                          = "bean.name"
-	FAIL_BACK_TASKS_KEY                = "failbacktasks"
-	FORKS_KEY                          = "forks"
-	DEFAULT_FORKS                      = 2
-	DEFAULT_TIMEOUT                    = 1000
-	ACCESS_LOG_KEY                     = "accesslog"
-	TPS_LIMITER_KEY                    = "tps.limiter"
-	TPS_REJECTED_EXECUTION_HANDLER_KEY = "tps.limit.rejected.handler"
-	TPS_LIMIT_RATE_KEY                 = "tps.limit.rate"
-	DEFAULT_TPS_LIMIT_RATE             = "-1"
-	TPS_LIMIT_INTERVAL_KEY             = "tps.limit.interval"
-	DEFAULT_TPS_LIMIT_INTERVAL         = "60000"
-	TPS_LIMIT_STRATEGY_KEY             = "tps.limit.strategy"
+	TIMESTAMP_KEY                          = "timestamp"
+	REMOTE_TIMESTAMP_KEY                   = "remote.timestamp"
+	CLUSTER_KEY                            = "cluster"
+	LOADBALANCE_KEY                        = "loadbalance"
+	WEIGHT_KEY                             = "weight"
+	WARMUP_KEY                             = "warmup"
+	RETRIES_KEY                            = "retries"
+	BEAN_NAME                              = "bean.name"
+	FAIL_BACK_TASKS_KEY                    = "failbacktasks"
+	FORKS_KEY                              = "forks"
+	DEFAULT_FORKS                          = 2
+	DEFAULT_TIMEOUT                        = 1000
+	ACCESS_LOG_KEY                         = "accesslog"
+	TPS_LIMITER_KEY                        = "tps.limiter"
+	TPS_REJECTED_EXECUTION_HANDLER_KEY     = "tps.limit.rejected.handler"
+	TPS_LIMIT_RATE_KEY                     = "tps.limit.rate"
+	DEFAULT_TPS_LIMIT_RATE                 = "-1"
+	TPS_LIMIT_INTERVAL_KEY                 = "tps.limit.interval"
+	DEFAULT_TPS_LIMIT_INTERVAL             = "60000"
+	TPS_LIMIT_STRATEGY_KEY                 = "tps.limit.strategy"
+	EXECUTE_LIMIT_KEY                      = "execute.limit"
+	DEFAULT_EXECUTE_LIMIT                  = "-1"
+	EXECUTE_REJECTED_EXECUTION_HANDLER_KEY = "execute.limit.rejected.handler"
 )
 
 const (

common/extension/filter.go

@@ -19,10 +19,12 @@ package extension
 
 import (
 	"github.com/apache/dubbo-go/filter"
+	"github.com/apache/dubbo-go/filter/common"
 )
 
 var (
-	filters = make(map[string]func() filter.Filter)
+	filters                  = make(map[string]func() filter.Filter)
+	rejectedExecutionHandler = make(map[string]func() common.RejectedExecutionHandler)
 )
 
 func SetFilter(name string, v func() filter.Filter) {
@@ -35,3 +37,16 @@ func GetFilter(name string) filter.Filter {
 	}
 	return filters[name]()
 }
+
+func SetRejectedExecutionHandler(name string, creator func() common.RejectedExecutionHandler) {
+	rejectedExecutionHandler[name] = creator
+}
+
+func GetRejectedExecutionHandler(name string) common.RejectedExecutionHandler {
+	creator, ok := rejectedExecutionHandler[name]
+	if !ok {
+		panic("RejectedExecutionHandler for " + name + " is not existing, make sure you have import the package " +
+			"and you have register it by invoking extension.SetRejectedExecutionHandler.")
+	}
+	return creator()
+}

common/extension/tps_limit.go

@@ -22,9 +22,8 @@ import (
 )
 
 var (
-	tpsLimitStrategy            = make(map[string]func(rate int, interval int) tps.TpsLimitStrategy)
-	tpsLimiter                  = make(map[string]func() tps.TpsLimiter)
-	tpsRejectedExecutionHandler = make(map[string]func() tps.RejectedExecutionHandler)
+	tpsLimitStrategy = make(map[string]func(rate int, interval int) tps.TpsLimitStrategy)
+	tpsLimiter       = make(map[string]func() tps.TpsLimiter)
 )
 
 func SetTpsLimiter(name string, creator func() tps.TpsLimiter) {
@@ -52,16 +51,3 @@ func GetTpsLimitStrategyCreator(name string) func(rate int, interval int) tps.Tp
 	}
 	return creator
 }
-
-func SetTpsRejectedExecutionHandler(name string, creator func() tps.RejectedExecutionHandler) {
-	tpsRejectedExecutionHandler[name] = creator
-}
-
-func GetTpsRejectedExecutionHandler(name string) tps.RejectedExecutionHandler {
-	creator, ok := tpsRejectedExecutionHandler[name]
-	if !ok {
-		panic("TpsRejectedExecutionHandler for " + name + " is not existing, make sure you have import the package " +
-			"and you have register it by invoking extension.SetTpsRejectedExecutionHandler.")
-	}
-	return creator()
-}

config/method_config.go

@@ -25,15 +25,17 @@ import (
 )
 
 type MethodConfig struct {
-	InterfaceId      string
-	InterfaceName    string
-	Name             string `yaml:"name"  json:"name,omitempty" property:"name"`
-	Retries          string `yaml:"retries"  json:"retries,omitempty" property:"retries"`
-	Loadbalance      string `yaml:"loadbalance"  json:"loadbalance,omitempty" property:"loadbalance"`
-	Weight           int64  `yaml:"weight"  json:"weight,omitempty" property:"weight"`
-	TpsLimitInterval string `yaml:"tps.limit.interval" json:"tps.limit.interval,omitempty" property:"tps.limit.interval"`
-	TpsLimitRate     string `yaml:"tps.limit.rate" json:"tps.limit.rate,omitempty" property:"tps.limit.rate"`
-	TpsLimitStrategy string `yaml:"tps.limit.strategy" json:"tps.limit.strategy,omitempty" property:"tps.limit.strategy"`
+	InterfaceId                 string
+	InterfaceName               string
+	Name                        string `yaml:"name"  json:"name,omitempty" property:"name"`
+	Retries                     string `yaml:"retries"  json:"retries,omitempty" property:"retries"`
+	Loadbalance                 string `yaml:"loadbalance"  json:"loadbalance,omitempty" property:"loadbalance"`
+	Weight                      int64  `yaml:"weight"  json:"weight,omitempty" property:"weight"`
+	TpsLimitInterval            string `yaml:"tps.limit.interval" json:"tps.limit.interval,omitempty" property:"tps.limit.interval"`
+	TpsLimitRate                string `yaml:"tps.limit.rate" json:"tps.limit.rate,omitempty" property:"tps.limit.rate"`
+	TpsLimitStrategy            string `yaml:"tps.limit.strategy" json:"tps.limit.strategy,omitempty" property:"tps.limit.strategy"`
+	ExecuteLimit                string `yaml:"execute.limit" json:"execute.limit,omitempty" property:"execute.limit"`
+	ExecuteLimitRejectedHandler string `yaml:"execute.limit.rejected.handler" json:"execute.limit.rejected.handler,omitempty" property:"execute.limit.rejected.handler"`
 }
 
 func (c *MethodConfig) Prefix() string {

config/service_config.go

@@ -43,32 +43,35 @@ import (
 )
 
 type ServiceConfig struct {
-	context                 context.Context
-	id                      string
-	Filter                  string            `yaml:"filter" json:"filter,omitempty" property:"filter"`
-	Protocol                string            `default:"dubbo"  required:"true"  yaml:"protocol"  json:"protocol,omitempty" property:"protocol"` // multi protocol support, split by ','
-	InterfaceName           string            `required:"true"  yaml:"interface"  json:"interface,omitempty" property:"interface"`
-	Registry                string            `yaml:"registry"  json:"registry,omitempty"  property:"registry"`
-	Cluster                 string            `default:"failover" yaml:"cluster"  json:"cluster,omitempty" property:"cluster"`
-	Loadbalance             string            `default:"random" yaml:"loadbalance"  json:"loadbalance,omitempty"  property:"loadbalance"`
-	Group                   string            `yaml:"group"  json:"group,omitempty" property:"group"`
-	Version                 string            `yaml:"version"  json:"version,omitempty" property:"version" `
-	Methods                 []*MethodConfig   `yaml:"methods"  json:"methods,omitempty" property:"methods"`
-	Warmup                  string            `yaml:"warmup"  json:"warmup,omitempty"  property:"warmup"`
-	Retries                 string            `yaml:"retries"  json:"retries,omitempty" property:"retries"`
-	Params                  map[string]string `yaml:"params"  json:"params,omitempty" property:"params"`
-	Token                   string            `yaml:"token" json:"token,omitempty" property:"token"`
-	AccessLog               string            `yaml:"accesslog" json:"accesslog,omitempty" property:"accesslog"`
-	TpsLimiter              string            `yaml:"tps.limiter" json:"tps.limiter,omitempty" property:"tps.limiter"`
-	TpsLimitInterval        string            `yaml:"tps.limit.interval" json:"tps.limit.interval,omitempty" property:"tps.limit.interval"`
-	TpsLimitRate            string            `yaml:"tps.limit.rate" json:"tps.limit.rate,omitempty" property:"tps.limit.rate"`
-	TpsLimitStrategy        string            `yaml:"tps.limit.strategy" json:"tps.limit.strategy,omitempty" property:"tps.limit.strategy"`
-	TpsLimitRejectedHandler string            `yaml:"tps.limit.rejected.handler" json:"tps.limit.rejected.handler,omitempty" property:"tps.limit.rejected.handler"`
-	unexported              *atomic.Bool
-	exported                *atomic.Bool
-	rpcService              common.RPCService
-	cacheProtocol           protocol.Protocol
-	cacheMutex              sync.Mutex
+	context                     context.Context
+	id                          string
+	Filter                      string            `yaml:"filter" json:"filter,omitempty" property:"filter"`
+	Protocol                    string            `default:"dubbo"  required:"true"  yaml:"protocol"  json:"protocol,omitempty" property:"protocol"` // multi protocol support, split by ','
+	InterfaceName               string            `required:"true"  yaml:"interface"  json:"interface,omitempty" property:"interface"`
+	Registry                    string            `yaml:"registry"  json:"registry,omitempty"  property:"registry"`
+	Cluster                     string            `default:"failover" yaml:"cluster"  json:"cluster,omitempty" property:"cluster"`
+	Loadbalance                 string            `default:"random" yaml:"loadbalance"  json:"loadbalance,omitempty"  property:"loadbalance"`
+	Group                       string            `yaml:"group"  json:"group,omitempty" property:"group"`
+	Version                     string            `yaml:"version"  json:"version,omitempty" property:"version" `
+	Methods                     []*MethodConfig   `yaml:"methods"  json:"methods,omitempty" property:"methods"`
+	Warmup                      string            `yaml:"warmup"  json:"warmup,omitempty"  property:"warmup"`
+	Retries                     string            `yaml:"retries"  json:"retries,omitempty" property:"retries"`
+	Params                      map[string]string `yaml:"params"  json:"params,omitempty" property:"params"`
+	Token                       string            `yaml:"token" json:"token,omitempty" property:"token"`
+	AccessLog                   string            `yaml:"accesslog" json:"accesslog,omitempty" property:"accesslog"`
+	TpsLimiter                  string            `yaml:"tps.limiter" json:"tps.limiter,omitempty" property:"tps.limiter"`
+	TpsLimitInterval            string            `yaml:"tps.limit.interval" json:"tps.limit.interval,omitempty" property:"tps.limit.interval"`
+	TpsLimitRate                string            `yaml:"tps.limit.rate" json:"tps.limit.rate,omitempty" property:"tps.limit.rate"`
+	TpsLimitStrategy            string            `yaml:"tps.limit.strategy" json:"tps.limit.strategy,omitempty" property:"tps.limit.strategy"`
+	TpsLimitRejectedHandler     string            `yaml:"tps.limit.rejected.handler" json:"tps.limit.rejected.handler,omitempty" property:"tps.limit.rejected.handler"`
+	ExecuteLimit                string            `yaml:"execute.limit" json:"execute.limit,omitempty" property:"execute.limit"`
+	ExecuteLimitRejectedHandler string            `yaml:"execute.limit.rejected.handler" json:"execute.limit.rejected.handler,omitempty" property:"execute.limit.rejected.handler"`
+
+	unexported    *atomic.Bool
+	exported      *atomic.Bool
+	rpcService    common.RPCService
+	cacheProtocol protocol.Protocol
+	cacheMutex    sync.Mutex
 }
 
 func (c *ServiceConfig) Prefix() string {
@@ -203,6 +206,10 @@ func (srvconfig *ServiceConfig) getUrlMap() url.Values {
 	urlMap.Set(constant.TPS_LIMITER_KEY, srvconfig.TpsLimiter)
 	urlMap.Set(constant.TPS_REJECTED_EXECUTION_HANDLER_KEY, srvconfig.TpsLimitRejectedHandler)
 
+	// execute limit filter
+	urlMap.Set(constant.EXECUTE_LIMIT_KEY, srvconfig.ExecuteLimit)
+	urlMap.Set(constant.EXECUTE_REJECTED_EXECUTION_HANDLER_KEY, srvconfig.ExecuteLimitRejectedHandler)
+
 	for _, v := range srvconfig.Methods {
 		prefix := "methods." + v.Name + "."
 		urlMap.Set(prefix+constant.LOADBALANCE_KEY, v.Loadbalance)
@@ -212,6 +219,10 @@ func (srvconfig *ServiceConfig) getUrlMap() url.Values {
 		urlMap.Set(prefix+constant.TPS_LIMIT_STRATEGY_KEY, v.TpsLimitStrategy)
 		urlMap.Set(prefix+constant.TPS_LIMIT_INTERVAL_KEY, v.TpsLimitInterval)
 		urlMap.Set(prefix+constant.TPS_LIMIT_RATE_KEY, v.TpsLimitRate)
+
+		urlMap.Set(constant.EXECUTE_LIMIT_KEY, v.ExecuteLimit)
+		urlMap.Set(constant.EXECUTE_REJECTED_EXECUTION_HANDLER_KEY, v.ExecuteLimitRejectedHandler)
+
 	}
 
 	return urlMap

config/testdata/provider_config.yml

@@ -38,6 +38,11 @@ services:
     tps.limit.strategy: "slidingWindow"
     # the name of RejectedExecutionHandler
     tps.limit.rejected.handler: "default"
+    # the concurrent request limitation of this service
+    # if the value < 0, it will not be limited.
+    execute.limit: "200"
+    # the name of RejectedExecutionHandler
+    execute.limit.rejected.handler: "default"
     protocol : "dubbo"
     # equivalent to interface of dubbo.xml
     interface : "com.ikurento.user.UserProvider"
@@ -50,6 +55,11 @@ services:
       - name: "GetUser"
         retries: 1
         loadbalance: "random"
+        # the concurrent request limitation of this method
+        # if the value < 0, it will not be limited.
+        execute.limit: "200"
+        # the name of RejectedExecutionHandler
+        execute.limit.rejected.handler: "default"
 
 protocols:
     "dubbo":

filter/impl/tps/impl/rejected_execution_handler_only_log.go → filter/common/impl/rejected_execution_handler_only_log.go

@@ -26,15 +26,15 @@ import (
 	"github.com/apache/dubbo-go/common/constant"
 	"github.com/apache/dubbo-go/common/extension"
 	"github.com/apache/dubbo-go/common/logger"
-	"github.com/apache/dubbo-go/filter/impl/tps"
+	filterCommon "github.com/apache/dubbo-go/filter/common"
 	"github.com/apache/dubbo-go/protocol"
 )
 
 const HandlerName = "log"
 
 func init() {
-	extension.SetTpsRejectedExecutionHandler(HandlerName, GetOnlyLogRejectedExecutionHandler)
-	extension.SetTpsRejectedExecutionHandler(constant.DEFAULT_KEY, GetOnlyLogRejectedExecutionHandler)
+	extension.SetRejectedExecutionHandler(HandlerName, GetOnlyLogRejectedExecutionHandler)
+	extension.SetRejectedExecutionHandler(constant.DEFAULT_KEY, GetOnlyLogRejectedExecutionHandler)
 }
 
 var onlyLogHandlerInstance *OnlyLogRejectedExecutionHandler
@@ -57,11 +57,11 @@ type OnlyLogRejectedExecutionHandler struct {
 }
 
 func (handler *OnlyLogRejectedExecutionHandler) RejectedExecution(url common.URL, invocation protocol.Invocation) protocol.Result {
-	logger.Errorf("The invocation was rejected due to over rate limitation. url: %s", url.String())
+	logger.Errorf("The invocation was rejected. url: %s", url.String())
 	return &protocol.RPCResult{}
 }
 
-func GetOnlyLogRejectedExecutionHandler() tps.RejectedExecutionHandler {
+func GetOnlyLogRejectedExecutionHandler() filterCommon.RejectedExecutionHandler {
 	onlyLogHandlerOnce.Do(func() {
 		onlyLogHandlerInstance = &OnlyLogRejectedExecutionHandler{}
 	})

filter/impl/tps/rejected_execution_handler.go → filter/common/rejected_execution_handler.go

@@ -14,25 +14,19 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package tps
+package common
 
 import (
 	"github.com/apache/dubbo-go/common"
 	"github.com/apache/dubbo-go/protocol"
 )
 
 /**
- * This implementation only logs the invocation info.
- * it always return en error inside the result.
- * "UserProvider":
- *   registry: "hangzhouzk"
- *   protocol : "dubbo"
- *   interface : "com.ikurento.user.UserProvider"
- *   ... # other configuration
- *   tps.limiter: "method-service" # the name of limiter
- *   tps.limit.rejected.handler: "name of handler"
- *   methods:
- *    - name: "GetUser"
+ * If the invocation cannot pass any validation in filter, like ExecuteLimitFilter and TpsLimitFilter,
+ * the implementation will be used.
+ * The common case is that sometimes you want to return the default value when the request was rejected.
+ * Or you want to be warned if any request was rejected.
+ * In such situation, implement this interface and register it by invoking extension.SetRejectedExecutionHandler.
  */
 type RejectedExecutionHandler interface {
 	RejectedExecution(url common.URL, invocation protocol.Invocation) protocol.Result