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f2ded515b7
client_golang was updated to support full label-oriented telemetry, which introduced interface incompatibilities with the previous version of Prometheus. To alleviate this, a general fetching and processing dispatching system has been created, which discriminates and processes according to the version of input.
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2013 Prometheus Team
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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 format
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import (
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"fmt"
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"net/http"
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)
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var (
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DefaultRegistry Registry = ®istry{}
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)
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// Registry is responsible for applying a determination strategy to the given
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// inputs to determine what Processor can handle this type of input.
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type Registry interface {
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// ProcessorForRequestHeader interprets a HTTP request header to determine
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// what Processor should be used for the given input.
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ProcessorForRequestHeader(header http.Header) (Processor, error)
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}
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type registry struct {
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}
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func (r *registry) ProcessorForRequestHeader(header http.Header) (processor Processor, err error) {
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if header == nil {
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err = fmt.Errorf("Received illegal and nil header.")
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return
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}
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prometheusApiVersion := header.Get("X-Prometheus-API-Version")
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switch prometheusApiVersion {
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case "0.0.1":
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processor = Processor001
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return
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default:
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err = fmt.Errorf("Unrecognized API version %s", prometheusApiVersion)
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return
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}
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return
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}
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