youtubebeat/vendor/github.com/elastic/beats/filebeat/beater/acker.go

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2018-11-18 11:08:38 +01:00
// 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 (
"github.com/elastic/beats/filebeat/input/file"
"github.com/elastic/beats/libbeat/logp"
)
// eventAcker handles publisher pipeline ACKs and forwards
// them to the registrar or directly to the stateless logger.
type eventACKer struct {
stateful statefulLogger
stateless statelessLogger
log *logp.Logger
}
type statefulLogger interface {
Published(states []file.State)
}
type statelessLogger interface {
Published(c int) bool
}
func newEventACKer(stateless statelessLogger, stateful statefulLogger) *eventACKer {
return &eventACKer{stateless: stateless, stateful: stateful, log: logp.NewLogger("acker")}
}
func (a *eventACKer) ackEvents(data []interface{}) {
stateless := 0
states := make([]file.State, 0, len(data))
for _, datum := range data {
if datum == nil {
stateless++
continue
}
st, ok := datum.(file.State)
if !ok {
stateless++
continue
}
states = append(states, st)
}
if len(states) > 0 {
a.log.Debugw("stateful ack", "count", len(states))
a.stateful.Published(states)
}
if stateless > 0 {
a.log.Debugw("stateless ack", "count", stateless)
a.stateless.Published(stateless)
}
}