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40 lines
1.5 KiB
Go
40 lines
1.5 KiB
Go
// Copyright 2016 Michal Witkowski. All Rights Reserved.
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// See LICENSE for licensing terms.
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// gRPC Prometheus monitoring interceptors for client-side gRPC.
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package grpc_prometheus
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import (
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prom "github.com/prometheus/client_golang/prometheus"
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)
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var (
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// DefaultClientMetrics is the default instance of ClientMetrics. It is
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// intended to be used in conjunction the default Prometheus metrics
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// registry.
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DefaultClientMetrics = NewClientMetrics()
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// UnaryClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Unary RPCs.
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UnaryClientInterceptor = DefaultClientMetrics.UnaryClientInterceptor()
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// StreamClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Streaming RPCs.
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StreamClientInterceptor = DefaultClientMetrics.StreamClientInterceptor()
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)
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func init() {
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prom.MustRegister(DefaultClientMetrics.clientStartedCounter)
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prom.MustRegister(DefaultClientMetrics.clientHandledCounter)
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prom.MustRegister(DefaultClientMetrics.clientStreamMsgReceived)
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prom.MustRegister(DefaultClientMetrics.clientStreamMsgSent)
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}
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// EnableClientHandlingTimeHistogram turns on recording of handling time of
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// RPCs. Histogram metrics can be very expensive for Prometheus to retain and
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// query. This function acts on the DefaultClientMetrics variable and the
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// default Prometheus metrics registry.
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func EnableClientHandlingTimeHistogram(opts ...HistogramOption) {
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DefaultClientMetrics.EnableClientHandlingTimeHistogram(opts...)
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prom.Register(DefaultClientMetrics.clientHandledHistogram)
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}
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