67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package manager
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import (
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"fmt"
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"log"
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"github.com/google/cadvisor/info"
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"github.com/google/cadvisor/storage"
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)
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type ContainerStats struct {
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ContainerReference info.ContainerReference
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Stats *info.ContainerStats
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// ResChan is nil if the sender wants to ignore the result
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ResChan chan<- error
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}
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// Create numWorkers goroutines to write container stats info into the
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// specified storage. Returns a write-only channel for the caller to write
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// container stats. Closing this channel will stop all workers.
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func StartContainerStatsWriters(
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numWorkers int,
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queueLength int,
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statsWriter storage.ContainerStatsWriter,
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) (chan<- *ContainerStats, error) {
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if statsWriter == nil {
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return nil, fmt.Errorf("invalid stats writer")
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}
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var ch chan *ContainerStats
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if queueLength > 0 {
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ch = make(chan *ContainerStats, queueLength)
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} else {
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ch = make(chan *ContainerStats)
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}
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for i := 0; i < numWorkers; i++ {
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go writeContainerStats(statsWriter, ch)
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}
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return ch, nil
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}
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func writeContainerStats(statsWriter storage.ContainerStatsWriter, ch <-chan *ContainerStats) {
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for stats := range ch {
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err := statsWriter.Write(stats.ContainerReference, stats.Stats)
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if err != nil {
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log.Printf("unable to write stats: %v", err)
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}
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if stats.ResChan != nil {
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stats.ResChan <- err
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}
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}
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}
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