2020-03-24 07:41:10 +02:00
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// Copyright The OpenTelemetry Authors
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2019-09-16 22:58:15 +02:00
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package trace
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import (
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"sync"
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2019-10-08 20:56:58 +02:00
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2019-11-05 23:08:55 +02:00
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export "go.opentelemetry.io/otel/sdk/export/trace"
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2019-09-16 22:58:15 +02:00
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)
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// SpanProcessor is interface to add hooks to start and end method invocations.
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type SpanProcessor interface {
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// OnStart method is invoked when span is started. It is a synchronous call
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// and hence should not block.
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2019-10-08 20:56:58 +02:00
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OnStart(sd *export.SpanData)
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2019-09-16 22:58:15 +02:00
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// OnEnd method is invoked when span is finished. It is a synchronous call
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// and hence should not block.
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OnEnd(sd *export.SpanData)
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// Shutdown is invoked when SDK shutsdown. Use this call to cleanup any processor
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// data. No calls to OnStart and OnEnd method is invoked after Shutdown call is
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// made. It should not be blocked indefinitely.
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Shutdown()
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2020-09-20 19:35:44 +02:00
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// ForceFlush exports all ended spans to the configured Exporter that have not yet
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// been exported. It should only be called when absolutely necessary, such as when
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// using a FaaS provider that may suspend the process after an invocation, but before
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// the Processor can export the completed spans.
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ForceFlush()
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}
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2020-09-24 20:43:23 +02:00
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type spanProcessorState struct {
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sp SpanProcessor
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state *sync.Once
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}
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type spanProcessorStates []*spanProcessorState
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