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factory.go
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factory.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 es
import (
"bufio"
"flag"
"os"
"path/filepath"
"strings"
"github.com/spf13/viper"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/pkg/es"
"github.com/jaegertracing/jaeger/pkg/es/config"
esDepStore "github.com/jaegertracing/jaeger/plugin/storage/es/dependencystore"
esSpanStore "github.com/jaegertracing/jaeger/plugin/storage/es/spanstore"
"github.com/jaegertracing/jaeger/storage/dependencystore"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
// Factory implements storage.Factory for Elasticsearch backend.
type Factory struct {
Options *Options
metricsFactory metrics.Factory
logger *zap.Logger
primaryConfig config.ClientBuilder
primaryClient es.Client
}
// NewFactory creates a new Factory.
func NewFactory() *Factory {
return &Factory{
Options: NewOptions("es"), // TODO add "es-archive" once supported
}
}
// AddFlags implements plugin.Configurable
func (f *Factory) AddFlags(flagSet *flag.FlagSet) {
f.Options.AddFlags(flagSet)
}
// InitFromViper implements plugin.Configurable
func (f *Factory) InitFromViper(v *viper.Viper) {
f.Options.InitFromViper(v)
f.primaryConfig = f.Options.GetPrimary()
}
// Initialize implements storage.Factory
func (f *Factory) Initialize(metricsFactory metrics.Factory, logger *zap.Logger) error {
f.metricsFactory, f.logger = metricsFactory, logger
primaryClient, err := f.primaryConfig.NewClient(logger, metricsFactory)
if err != nil {
return err
}
f.primaryClient = primaryClient
// TODO init archive (cf. https://github.com/jaegertracing/jaeger/pull/604)
return nil
}
// CreateSpanReader implements storage.Factory
func (f *Factory) CreateSpanReader() (spanstore.Reader, error) {
cfg := f.primaryConfig
return esSpanStore.NewSpanReader(esSpanStore.SpanReaderParams{
Client: f.primaryClient,
Logger: f.logger,
MetricsFactory: f.metricsFactory,
MaxSpanAge: cfg.GetMaxSpanAge(),
MaxNumSpans: cfg.GetMaxNumSpans(),
IndexPrefix: cfg.GetIndexPrefix(),
TagDotReplacement: cfg.GetTagDotReplacement(),
}), nil
}
// CreateSpanWriter implements storage.Factory
func (f *Factory) CreateSpanWriter() (spanstore.Writer, error) {
cfg := f.primaryConfig
var tags []string
if cfg.GetTagsFilePath() != "" {
var err error
if tags, err = loadTagsFromFile(cfg.GetTagsFilePath()); err != nil {
f.logger.Error("Could not open file with tags", zap.Error(err))
return nil, err
}
}
return esSpanStore.NewSpanWriter(esSpanStore.SpanWriterParams{Client: f.primaryClient,
Logger: f.logger,
MetricsFactory: f.metricsFactory,
NumShards: f.primaryConfig.GetNumShards(),
NumReplicas: f.primaryConfig.GetNumReplicas(),
IndexPrefix: f.primaryConfig.GetIndexPrefix(),
AllTagsAsFields: f.primaryConfig.GetAllTagsAsFields(),
TagKeysAsFields: tags,
TagDotReplacement: f.primaryConfig.GetTagDotReplacement(),
}), nil
}
// CreateDependencyReader implements storage.Factory
func (f *Factory) CreateDependencyReader() (dependencystore.Reader, error) {
return esDepStore.NewDependencyStore(f.primaryClient, f.logger, f.primaryConfig.GetIndexPrefix()), nil
}
func loadTagsFromFile(filePath string) ([]string, error) {
file, err := os.Open(filepath.Clean(filePath))
if err != nil {
return nil, err
}
defer file.Close()
scanner := bufio.NewScanner(file)
var tags []string
for scanner.Scan() {
line := scanner.Text()
if tag := strings.TrimSpace(line); tag != "" {
tags = append(tags, tag)
}
}
return tags, nil
}