/
sampler.go
48 lines (41 loc) · 1.32 KB
/
sampler.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF 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 harness
import (
"context"
"time"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/metrics"
)
type stateSampler struct {
done chan (int)
sampler metrics.StateSampler
}
func newSampler(store *metrics.Store) *stateSampler {
return &stateSampler{sampler: metrics.NewSampler(store), done: make(chan int)}
}
func (s *stateSampler) start(ctx context.Context, t time.Duration) {
for {
select {
case <-s.done:
return
default:
s.sampler.Sample(ctx, t)
time.Sleep(t)
}
}
}
func (s *stateSampler) stop() {
close(s.done)
}