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// SPDX-License-Identifier: GPL-3.0-or-later
package filestatus
import (
"context"
"log/slog"
"os"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/confgroup"
"github.com/netdata/netdata/go/go.d.plugin/logger"
)
func NewManager(path string) *Manager {
return &Manager{
Logger: logger.New().With(
slog.String("component", "filestatus manager"),
),
path: path,
store: &Store{},
flushEvery: time.Second * 5,
flushCh: make(chan struct{}, 1),
}
}
type Manager struct {
*logger.Logger
path string
store *Store
flushEvery time.Duration
flushCh chan struct{}
}
func (m *Manager) Run(ctx context.Context) {
m.Info("instance is started")
defer func() { m.Info("instance is stopped") }()
tk := time.NewTicker(m.flushEvery)
defer tk.Stop()
defer m.flush()
for {
select {
case <-ctx.Done():
return
case <-tk.C:
m.tryFlush()
}
}
}
func (m *Manager) Save(cfg confgroup.Config, status string) {
if v, ok := m.store.lookup(cfg); !ok || status != v {
m.store.add(cfg, status)
m.triggerFlush()
}
}
func (m *Manager) Remove(cfg confgroup.Config) {
if _, ok := m.store.lookup(cfg); ok {
m.store.remove(cfg)
m.triggerFlush()
}
}
func (m *Manager) triggerFlush() {
select {
case m.flushCh <- struct{}{}:
default:
}
}
func (m *Manager) tryFlush() {
select {
case <-m.flushCh:
m.flush()
default:
}
}
func (m *Manager) flush() {
bs, err := m.store.bytes()
if err != nil {
return
}
f, err := os.Create(m.path)
if err != nil {
return
}
defer func() { _ = f.Close() }()
_, _ = f.Write(bs)
}
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