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dumper.go
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dumper.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 metrics
import (
"context"
"fmt"
"sort"
"time"
"github.com/apache/beam/sdks/go/pkg/beam/log"
)
// DumpToLog is a debugging function that outputs all metrics available locally
// to beam.Log.
func DumpToLog(ctx context.Context) {
store := GetStore(ctx)
if store == nil {
log.Errorf(ctx, "Unable to dump metrics: provided context doesn't contain metrics Store.")
return
}
DumpToLogFromStore(ctx, store)
}
// DumpToLogFromStore dumps the metrics in the provided Store to beam.Log.
func DumpToLogFromStore(ctx context.Context, store *Store) {
dumperExtractor(store, func(format string, args ...interface{}) {
log.Errorf(ctx, format, args...)
})
}
// DumpToOutFromContext is a debugging function that outputs all metrics
// available locally to std out,
// extracting the metric store from the context.
func DumpToOutFromContext(ctx context.Context) {
store := GetStore(ctx)
if store == nil {
fmt.Printf("Unable to dump metrics: provided context doesn't contain metrics Store.")
return
}
DumpToOutFromStore(store)
}
// DumpToOutFromStore is a debugging function that outputs all metrics
// available locally to std out directly from the store.
func DumpToOutFromStore(store *Store) {
dumperExtractor(store, func(format string, args ...interface{}) {
fmt.Printf(format+"\n", args...)
})
}
func dumperExtractor(store *Store, p func(format string, args ...interface{})) {
m := make(map[Labels]interface{})
e := &Extractor{
SumInt64: func(l Labels, v int64) {
m[l] = &counter{value: v}
},
DistributionInt64: func(l Labels, count, sum, min, max int64) {
m[l] = &distribution{count: count, sum: sum, min: min, max: max}
},
GaugeInt64: func(l Labels, v int64, t time.Time) {
m[l] = &gauge{v: v, t: t}
},
}
e.ExtractFrom(store)
dumpTo(m, p)
}
func dumpTo(store map[Labels]interface{}, p func(format string, args ...interface{})) {
var ls []Labels
for l := range store {
ls = append(ls, l)
}
sort.Slice(ls, func(i, j int) bool {
if ls[i].transform < ls[j].transform {
return true
}
tEq := ls[i].transform == ls[j].transform
if tEq && ls[i].namespace < ls[j].namespace {
return true
}
nsEq := ls[i].namespace == ls[j].namespace
if tEq && nsEq && ls[i].name < ls[j].name {
return true
}
return false
})
curT := "probably-definitely-unset"
for _, l := range ls {
if l.transform != curT {
curT = l.transform
p("PTransformID: %q", curT)
}
m := store[l]
p("\t%s - %s", name{namespace: l.namespace, name: l.name}, m)
}
}