89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
|
|
// license agreements. See the NOTICE file distributed with
|
|
// this work for additional information regarding copyright
|
|
// ownership. Elasticsearch B.V. 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 beater
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/elastic/beats/filebeat/input/file"
|
|
"github.com/elastic/beats/filebeat/registrar"
|
|
"github.com/elastic/beats/libbeat/monitoring"
|
|
)
|
|
|
|
type registrarLogger struct {
|
|
done chan struct{}
|
|
ch chan<- []file.State
|
|
}
|
|
|
|
type finishedLogger struct {
|
|
wg *eventCounter
|
|
}
|
|
|
|
type eventCounter struct {
|
|
added *monitoring.Uint
|
|
done *monitoring.Uint
|
|
count *monitoring.Int
|
|
wg sync.WaitGroup
|
|
}
|
|
|
|
func newRegistrarLogger(reg *registrar.Registrar) *registrarLogger {
|
|
return ®istrarLogger{
|
|
done: make(chan struct{}),
|
|
ch: reg.Channel,
|
|
}
|
|
}
|
|
|
|
func (l *registrarLogger) Close() { close(l.done) }
|
|
func (l *registrarLogger) Published(states []file.State) {
|
|
select {
|
|
case <-l.done:
|
|
// set ch to nil, so no more events will be send after channel close signal
|
|
// has been processed the first time.
|
|
// Note: nil channels will block, so only done channel will be actively
|
|
// report 'closed'.
|
|
l.ch = nil
|
|
case l.ch <- states:
|
|
}
|
|
}
|
|
|
|
func newFinishedLogger(wg *eventCounter) *finishedLogger {
|
|
return &finishedLogger{wg}
|
|
}
|
|
|
|
func (l *finishedLogger) Published(n int) bool {
|
|
for i := 0; i < n; i++ {
|
|
l.wg.Done()
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (c *eventCounter) Add(delta int) {
|
|
c.count.Add(int64(delta))
|
|
c.added.Add(uint64(delta))
|
|
c.wg.Add(delta)
|
|
}
|
|
|
|
func (c *eventCounter) Done() {
|
|
c.count.Dec()
|
|
c.done.Inc()
|
|
c.wg.Done()
|
|
}
|
|
|
|
func (c *eventCounter) Wait() {
|
|
c.wg.Wait()
|
|
}
|