mirror of https://github.com/knative/pkg.git
69 lines
2.0 KiB
Go
69 lines
2.0 KiB
Go
/*
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Copyright 2019 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package tracing
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import (
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"contrib.go.opencensus.io/exporter/zipkin"
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zipkinmodel "github.com/openzipkin/zipkin-go/model"
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zipkinreporter "github.com/openzipkin/zipkin-go/reporter"
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"go.opencensus.io/trace"
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"knative.dev/pkg/tracing/config"
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)
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// ZipkinReporterFactory is a factory function which creates a reporter given a config
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type ZipkinReporterFactory func(*config.Config) (zipkinreporter.Reporter, error)
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// DEPRECATED: This function is the legacy entrypoint and should be replaced with one of:
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// - WithExporter() in production code
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// - testing/FakeZipkinExporter() in test code.
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func WithZipkinExporter(reporterFact ZipkinReporterFactory, endpoint *zipkinmodel.Endpoint) ConfigOption {
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return func(cfg *config.Config) error {
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var (
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reporter zipkinreporter.Reporter
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exporter trace.Exporter
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)
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if cfg != nil && cfg.Backend == config.Zipkin {
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// Initialize our reporter / exporter
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// do this before cleanup to minimize time where we have duplicate exporters
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reporter, err := reporterFact(cfg)
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if err != nil {
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return err
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}
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exporter := zipkin.NewExporter(reporter, endpoint)
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trace.RegisterExporter(exporter)
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}
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// We know this is set because we are called with acquireGlobal lock held
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oct := globalOct
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if oct.exporter != nil {
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trace.UnregisterExporter(oct.exporter)
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}
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if oct.closer != nil {
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// TODO(greghaynes) log this error
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_ = oct.closer.Close()
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}
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oct.closer = reporter
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oct.exporter = exporter
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return nil
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}
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}
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