// HandleRPC implements per-RPC tracing and stats instrumentation.
func (c *statsHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
switch rs := rs.(type) {
case *stats.InHeader:
if rs.Client {
fmt.Printf(rs.Header)
}
case *stats.End:
ign := false
c.lock.RLock()
ign = c.ignore
c.lock.RUnlock()
if !ign {
duration := rs.EndTime.Sub(rs.BeginTime)
var st string
s, ok := status.FromError(rs.Error)
if ok {
st = s.Code().String()
}
c.results <- &callResult{rs.Error, st, duration, rs.EndTime}
if c.hasLog {
c.log.Debugw("Received RPC Stats",
"statsID", c.id, "code", st, "error", rs.Error,
"duration", duration, "stats", rs)
}
}
}
}
我有
response metadata
出现在事件 *stats.InHeader
上,其余的 grpc stats
出现在事件 *stats.End
上,我想在 grpc 末尾将 metadata
和 grpc stats
组合成一个结构对象 callResult
称呼。我很不知道如何实现这一点,我对 go 和 grpc 真的很陌生。有人可以帮我解决这个问题吗,谢谢!
type MutableObject struct {
InMetadata metadata.MD // Example mutable field
}
// TagRPC implements per-RPC context management.
func (c *statsHandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
ctx = context.WithValue(ctx, "InHeader", &MutableObject{})
return ctx
}
// HandleRPC implements per-RPC tracing and stats instrumentation.
func (c *statsHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
switch rs := rs.(type) {
case *stats.InHeader:
var headerValue metadata.MD
// You can access the `InHeader` field from the `s` object to get the received headers.
if rs.Client {
ign := false
c.lock.RLock()
ign = c.ignore
c.lock.RUnlock()
if !ign {
headerValue = rs.Header
if header, ok := ctx.Value("InHeader").(*MutableObject); ok {
header.InMetadata = headerValue
}
}
}
case *stats.End:
ign := false
c.lock.RLock()
ign = c.ignore
c.lock.RUnlock()
if !ign {
duration := rs.EndTime.Sub(rs.BeginTime)
var st string
s, ok := status.FromError(rs.Error)
if ok {
st = s.Code().String()
}
// Retrieve the header value from the context
// fmt.Printf("------------->>>>>>>>>%T",ctx.Value("InHeader"))
// fmt.Println("------------->>>>>>>>>",ctx.Value("InHeader"))
var ts time.Time
if header, ok := ctx.Value("InHeader").(*MutableObject); ok {
databroker_timestamp, err := strconv.ParseInt(header.InMetadata["ts"][0], 10, 64)
if err == nil {
ts = time.Unix(int64(math.Abs(float64(databroker_timestamp)/1000000000)), databroker_timestamp%1000000000)
}
}
c.results <- &callResult{rs.Error, st, duration, rs.EndTime, ts, 10, 10}
if c.hasLog {
c.log.Debugw("Received RPC Stats",
"statsID", c.id, "code", st, "error", rs.Error,
"duration", duration, "stats", rs)
}
}
}
}
TagRPC
*stats.InHeader
事件上的可变对象*stats.End