/
pump.go
51 lines (44 loc) · 1.17 KB
/
pump.go
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// Copyright 2019 ScyllaDB
//
// 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 jobs
import (
"time"
"github.com/scylladb/gemini/pkg/stop"
"go.uber.org/zap"
"golang.org/x/exp/rand"
)
func NewPump(stopFlag *stop.Flag, logger *zap.Logger) chan time.Duration {
pump := make(chan time.Duration, 10000)
logger = logger.Named("Pump")
go func() {
logger.Debug("pump channel opened")
defer func() {
close(pump)
logger.Debug("pump channel closed")
}()
for !stopFlag.IsHardOrSoft() {
pump <- newHeartBeat()
}
}()
return pump
}
func newHeartBeat() time.Duration {
r := rand.Intn(10)
switch r {
case 0:
return 10 * time.Millisecond
default:
return 0
}
}