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本文主要研究一下dubbo-go的TpsLimitFilter
TpsLimitFilter
dubbo-go-v1.4.2/filter/filter_impl/tps_limit_filter.go
代码语言:javascript复制const (
// TpsLimitFilterKey key
TpsLimitFilterKey = "tps"
)
func init() {
extension.SetFilter(TpsLimitFilterKey, GetTpsLimitFilter)
}
type TpsLimitFilter struct {
}
- TpsLimitFilter的init设置了GetTpsLimitFilter
GetTpsLimitFilter
dubbo-go-v1.4.2/filter/filter_impl/tps_limit_filter.go
代码语言:javascript复制// GetTpsLimitFilter ...
func GetTpsLimitFilter() filter.Filter {
return &TpsLimitFilter{}
}
- GetTpsLimitFilter实例化TpsLimitFilter
Invoke
dubbo-go-v1.4.2/filter/filter_impl/tps_limit_filter.go
代码语言:javascript复制// Invoke ...
func (t TpsLimitFilter) Invoke(ctx context.Context, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
url := invoker.GetUrl()
tpsLimiter := url.GetParam(constant.TPS_LIMITER_KEY, "")
rejectedExeHandler := url.GetParam(constant.TPS_REJECTED_EXECUTION_HANDLER_KEY, constant.DEFAULT_KEY)
if len(tpsLimiter) > 0 {
allow := extension.GetTpsLimiter(tpsLimiter).IsAllowable(invoker.GetUrl(), invocation)
if allow {
return invoker.Invoke(ctx, invocation)
}
logger.Errorf("The invocation was rejected due to over the tps limitation, url: %s ", url.String())
return extension.GetRejectedExecutionHandler(rejectedExeHandler).RejectedExecution(url, invocation)
}
return invoker.Invoke(ctx, invocation)
}
- Invoke方法读取constant.TPS_LIMITER_KEY及constant.TPS_REJECTED_EXECUTION_HANDLER_KEY;对于有配置tpsLimiter的执行extension.GetTpsLimiter(tpsLimiter).IsAllowable(invoker.GetUrl(), invocation),对于allow的执行invoker.Invoke(ctx, invocation),非allow的执行extension.GetRejectedExecutionHandler(rejectedExeHandler).RejectedExecution(url, invocation)
OnResponse
dubbo-go-v1.4.2/filter/filter_impl/tps_limit_filter.go
代码语言:javascript复制// OnResponse ...
func (t TpsLimitFilter) OnResponse(_ context.Context, result protocol.Result, _ protocol.Invoker,
_ protocol.Invocation) protocol.Result {
return result
}
- OnResponse目前不做任何操作
小结
TpsLimitFilter的Invoke方法读取constant.TPS_LIMITER_KEY及constant.TPS_REJECTED_EXECUTION_HANDLER_KEY;对于有配置tpsLimiter的执行extension.GetTpsLimiter(tpsLimiter).IsAllowable(invoker.GetUrl(), invocation),对于allow的执行invoker.Invoke(ctx, invocation),非allow的执行extension.GetRejectedExecutionHandler(rejectedExeHandler).RejectedExecution(url, invocation)
doc
- tps_limit_filter