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https://github.com/rocky-linux/peridot.git
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101 lines
3.1 KiB
Go
101 lines
3.1 KiB
Go
// The MIT License
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//
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// Copyright (c) 2021 Temporal Technologies Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package metrics
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import (
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"context"
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"strings"
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"time"
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"google.golang.org/grpc"
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)
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// HandlerContextKey is the context key for a MetricHandler value.
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type HandlerContextKey struct{}
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// LongPollContextKey is the context key for a boolean stating whether the gRPC
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// call is a long poll.
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type LongPollContextKey struct{}
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// NewGRPCInterceptor creates a new gRPC unary interceptor to record metrics.
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func NewGRPCInterceptor(defaultHandler Handler, suffix string) grpc.UnaryClientInterceptor {
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return func(
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ctx context.Context,
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method string,
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req interface{},
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reply interface{},
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cc *grpc.ClientConn,
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invoker grpc.UnaryInvoker,
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opts ...grpc.CallOption,
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) error {
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handler, _ := ctx.Value(HandlerContextKey{}).(Handler)
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if handler == nil {
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handler = defaultHandler
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}
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longPoll, ok := ctx.Value(LongPollContextKey{}).(bool)
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if !ok {
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longPoll = false
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}
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// Only take method name after the last slash
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operation := method[strings.LastIndex(method, "/")+1:]
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handler = handler.WithTags(map[string]string{OperationTagName: operation})
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// Capture time, record start, run, and record end
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start := time.Now()
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recordRequestStart(handler, longPoll, suffix)
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err := invoker(ctx, method, req, reply, cc, opts...)
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recordRequestEnd(handler, longPoll, suffix, start, err)
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return err
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}
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}
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func recordRequestStart(handler Handler, longPoll bool, suffix string) {
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// Count request
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metric := TemporalRequest
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if longPoll {
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metric = TemporalLongRequest
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}
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metric += suffix
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handler.Counter(metric).Inc(1)
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}
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func recordRequestEnd(handler Handler, longPoll bool, suffix string, start time.Time, err error) {
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// Record latency
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timerMetric := TemporalRequestLatency
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if longPoll {
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timerMetric = TemporalLongRequestLatency
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}
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timerMetric += suffix
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handler.Timer(timerMetric).Record(time.Since(start))
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// Count failure
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if err != nil {
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failureMetric := TemporalRequestFailure
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if longPoll {
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failureMetric = TemporalLongRequestFailure
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}
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failureMetric += suffix
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handler.Counter(failureMetric).Inc(1)
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}
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}
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