/
processor.go
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/
processor.go
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// Copyright observIQ, 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 logdeduplicationprocessor
import (
"context"
"fmt"
"sync"
"time"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/pdata/plog"
"go.uber.org/zap"
)
// logDedupProcessor is a logDedupProcessor that counts duplicate instances of logs.
type logDedupProcessor struct {
emitInterval time.Duration
aggregator *logAggregator
remover *fieldRemover
consumer consumer.Logs
logger *zap.Logger
cancel context.CancelFunc
wg sync.WaitGroup
mux sync.Mutex
}
func newProcessor(cfg *Config, consumer consumer.Logs, logger *zap.Logger) (*logDedupProcessor, error) {
// This should not happen due to config validation but we check anyways.
timezone, err := time.LoadLocation(cfg.Timezone)
if err != nil {
return nil, fmt.Errorf("invalid timezone: %w", err)
}
return &logDedupProcessor{
emitInterval: cfg.Interval,
aggregator: newLogAggregator(cfg.LogCountAttribute, timezone),
remover: newFieldRemover(cfg.ExcludeFields),
consumer: consumer,
logger: logger,
}, nil
}
// Start starts the processor.
func (p *logDedupProcessor) Start(_ context.Context, _ component.Host) error {
ctx, cancel := context.WithCancel(context.Background())
p.cancel = cancel
p.wg.Add(1)
go p.handleExportInterval(ctx)
return nil
}
// Capabilities returns the consumer's capabilities.
func (p *logDedupProcessor) Capabilities() consumer.Capabilities {
return consumer.Capabilities{MutatesData: true}
}
// Shutdown stops the processor.
func (p *logDedupProcessor) Shutdown(ctx context.Context) error {
if p.cancel != nil {
p.cancel()
}
doneChan := make(chan struct{})
go func() {
defer close(doneChan)
p.wg.Wait()
}()
select {
case <-ctx.Done():
return ctx.Err()
case <-doneChan:
return nil
}
}
// ConsumeLogs processes the logs.
func (p *logDedupProcessor) ConsumeLogs(_ context.Context, pl plog.Logs) error {
p.mux.Lock()
defer p.mux.Unlock()
for i := 0; i < pl.ResourceLogs().Len(); i++ {
resourceLogs := pl.ResourceLogs().At(i)
resourceAttrs := resourceLogs.Resource().Attributes()
for j := 0; j < resourceLogs.ScopeLogs().Len(); j++ {
scope := resourceLogs.ScopeLogs().At(j)
logs := scope.LogRecords()
for k := 0; k < logs.Len(); k++ {
logRecord := logs.At(k)
// Remove excluded fields if any
p.remover.RemoveFields(logRecord)
// Add the log to the aggregator
p.aggregator.Add(resourceAttrs, logRecord)
}
}
}
return nil
}
// handleExportInterval sends metrics at the configured interval.
func (p *logDedupProcessor) handleExportInterval(ctx context.Context) {
defer p.wg.Done()
ticker := time.NewTicker(p.emitInterval)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
p.mux.Lock()
logs := p.aggregator.Export()
// Only send logs if we have some
if logs.LogRecordCount() > 0 {
err := p.consumer.ConsumeLogs(ctx, logs)
if err != nil {
p.logger.Error("failed to consume logs", zap.Error(err))
}
}
p.aggregator.Reset()
p.mux.Unlock()
}
}
}