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e637661ea2
* Adding a way to inject a request ID It is very useful to associate a request ID to each incoming request, this change allows to provide a function to do that via Server Option. The change comes with a default function which will generate a new request ID. The request ID is put in the request context along with a common logger which always logs the request-id We add gRPC interceptors to the server so it can get the request ID out of the gRPC metadata and put it in the common logger stored in the context so as all the log lines using the common logger from the context will have the request ID logged
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
// Copyright 2017 Michal Witkowski. All Rights Reserved.
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// See LICENSE for licensing terms.
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package grpc_opentracing
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import (
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"context"
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"github.com/opentracing/opentracing-go"
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)
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var (
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defaultOptions = &options{
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filterOutFunc: nil,
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tracer: nil,
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}
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)
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// FilterFunc allows users to provide a function that filters out certain methods from being traced.
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//
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// If it returns false, the given request will not be traced.
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type FilterFunc func(ctx context.Context, fullMethodName string) bool
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type options struct {
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filterOutFunc FilterFunc
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tracer opentracing.Tracer
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}
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func evaluateOptions(opts []Option) *options {
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optCopy := &options{}
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*optCopy = *defaultOptions
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for _, o := range opts {
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o(optCopy)
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}
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if optCopy.tracer == nil {
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optCopy.tracer = opentracing.GlobalTracer()
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}
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return optCopy
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}
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type Option func(*options)
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// WithFilterFunc customizes the function used for deciding whether a given call is traced or not.
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func WithFilterFunc(f FilterFunc) Option {
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return func(o *options) {
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o.filterOutFunc = f
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}
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}
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// WithTracer sets a custom tracer to be used for this middleware, otherwise the opentracing.GlobalTracer is used.
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func WithTracer(tracer opentracing.Tracer) Option {
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return func(o *options) {
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o.tracer = tracer
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}
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}
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