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metrics.go
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metrics.go
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// Copyright 2019 Anapaya Systems
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package infra
import (
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/lib/prom"
)
const (
PromSrcASLocal = "as_local"
PromSrcISDLocal = "isd_local"
PromSrcISDRemote = "isd_remote"
PromSrcUnknown = "unknown"
)
// HandlerResult contains a result label and a status label.
type HandlerResult struct {
// Result is the label used for the result metric.
Result string
// Status is one of prom.StatusOk, prom.StatusErr, prom.StatusTimeout it is used for the latency
// histogram. This is a reduced view of the result, so that we don't get too many timeseries on
// the histogram.
Status string
}
var (
MetricsErrInternal = &HandlerResult{Result: "err_internal", Status: prom.StatusErr}
MetricsErrInvalid = &HandlerResult{Result: "err_invalid_req", Status: prom.StatusErr}
metricsErrMsger = &HandlerResult{Result: "err_msger", Status: prom.StatusErr}
metricsErrMsgerTimeout = &HandlerResult{Result: "err_msger_to", Status: prom.StatusTimeout}
metricsErrTrustDB = &HandlerResult{Result: "err_trustdb", Status: prom.StatusErr}
metricsErrTrustDBTimeout = &HandlerResult{Result: "err_trustdb_to", Status: prom.StatusTimeout}
metricsErrTS = &HandlerResult{Result: "err_truststore", Status: prom.StatusErr}
metricsErrTSTimeout = &HandlerResult{Result: "err_truststore_to", Status: prom.StatusTimeout}
metricsErrRevCache = &HandlerResult{Result: "err_revcache", Status: prom.StatusErr}
metricsErrRevCacheTo = &HandlerResult{Result: "err_revcache_to", Status: prom.StatusTimeout}
MetricsResultOk = &HandlerResult{Result: prom.Success, Status: prom.StatusOk}
)
func MetricsErrTrustDB(err error) *HandlerResult {
return MetricsErrWithTimeout(err, metricsErrTrustDBTimeout, metricsErrTrustDB)
}
func MetricsErrRevCache(err error) *HandlerResult {
return MetricsErrWithTimeout(err, metricsErrRevCacheTo, metricsErrRevCache)
}
func MetricsErrMsger(err error) *HandlerResult {
return MetricsErrWithTimeout(err, metricsErrMsgerTimeout, metricsErrMsger)
}
func MetricsErrTrustStore(err error) *HandlerResult {
return MetricsErrWithTimeout(err, metricsErrTSTimeout, metricsErrTS)
}
// MetricsErrWithTimeout checks if the error is a timeout and if so returns
// timeoutResult otherwise returns result.
func MetricsErrWithTimeout(err error, timeoutResult, result *HandlerResult) *HandlerResult {
if common.IsTimeoutErr(err) {
return timeoutResult
}
return result
}