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hook_interceptor.go
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hook_interceptor.go
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package proxy
import (
"context"
"strconv"
"strings"
"go.uber.org/zap"
"google.golang.org/grpc"
"github.com/milvus-io/milvus-proto/go-api/v2/hook"
"github.com/milvus-io/milvus/internal/util/hookutil"
"github.com/milvus-io/milvus/pkg/log"
"github.com/milvus-io/milvus/pkg/metrics"
"github.com/milvus-io/milvus/pkg/util/paramtable"
)
var hoo hook.Hook
func UnaryServerHookInterceptor() grpc.UnaryServerInterceptor {
hookutil.InitOnceHook()
hoo = hookutil.Hoo
return func(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
var (
fullMethod = info.FullMethod
newCtx context.Context
isMock bool
mockResp interface{}
realResp interface{}
realErr error
err error
)
if isMock, mockResp, err = hoo.Mock(ctx, req, fullMethod); isMock {
log.Info("hook mock", zap.String("user", getCurrentUser(ctx)),
zap.String("full method", fullMethod), zap.Error(err))
metrics.ProxyHookFunc.WithLabelValues(metrics.HookMock, fullMethod).Inc()
updateProxyFunctionCallMetric(fullMethod)
return mockResp, err
}
if newCtx, err = hoo.Before(ctx, req, fullMethod); err != nil {
log.Warn("hook before error", zap.String("user", getCurrentUser(ctx)), zap.String("full method", fullMethod),
zap.Any("request", req), zap.Error(err))
metrics.ProxyHookFunc.WithLabelValues(metrics.HookBefore, fullMethod).Inc()
updateProxyFunctionCallMetric(fullMethod)
return nil, err
}
realResp, realErr = handler(newCtx, req)
if err = hoo.After(newCtx, realResp, realErr, fullMethod); err != nil {
log.Warn("hook after error", zap.String("user", getCurrentUser(ctx)), zap.String("full method", fullMethod),
zap.Any("request", req), zap.Error(err))
metrics.ProxyHookFunc.WithLabelValues(metrics.HookAfter, fullMethod).Inc()
updateProxyFunctionCallMetric(fullMethod)
return nil, err
}
return realResp, realErr
}
}
func updateProxyFunctionCallMetric(fullMethod string) {
strs := strings.Split(fullMethod, "/")
method := strs[len(strs)-1]
if method == "" {
return
}
metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel, "", "").Inc()
metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel, "", "").Inc()
}
func getCurrentUser(ctx context.Context) string {
username, err := GetCurUserFromContext(ctx)
if err != nil {
log.Warn("fail to get current user", zap.Error(err))
}
return username
}
func SetMockAPIHook(apiUser string, mockErr error) {
if apiUser == "" && mockErr == nil {
hoo = &hookutil.DefaultHook{}
return
}
hoo = &hookutil.MockAPIHook{
MockErr: mockErr,
User: apiUser,
}
}