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worker.go
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worker.go
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// Copyright (c) 2021 Terminus, Inc.
//
// 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 task
import (
"context"
"fmt"
"io"
"time"
"google.golang.org/protobuf/types/known/structpb"
"github.com/erda-project/erda-infra/base/logs"
"github.com/erda-project/erda-proto-go/msp/apm/checker/pb"
"github.com/erda-project/erda/modules/msp/apm/checker/plugins"
)
// Worker .
type Worker interface {
Run(ctx context.Context)
}
var (
defaultStrategy = "periodic"
defaultPeriodicInterval = 30 * time.Second
)
func NewWorker(log logs.Logger, c *pb.Checker, ctx plugins.Context, handler plugins.Handler) (Worker, error) {
strategy := c.Config["strategy"].GetStringValue()
if len(strategy) == 0 {
strategy = defaultStrategy
}
switch strategy {
case "periodic":
return newPeriodicWorker(log, c.Config, ctx, handler)
case "cron":
// TODO .
}
return nil, fmt.Errorf("strategy %q not support", strategy)
}
type periodicWorker struct {
log logs.Logger
ctx plugins.Context
handler plugins.Handler
interval time.Duration
closeCh chan struct{}
}
func newPeriodicWorker(log logs.Logger, cfg map[string]*structpb.Value, ctx plugins.Context, handler plugins.Handler) (*periodicWorker, error) {
interval := defaultPeriodicInterval
if i := cfg["interval"].GetNumberValue(); i > 0 {
interval = time.Duration(i) * time.Second
if i <= 0 {
return nil, fmt.Errorf("invalid interval %d", int64(i))
}
}
return &periodicWorker{
log: log,
ctx: ctx,
handler: handler,
interval: interval,
closeCh: make(chan struct{}),
}, nil
}
func (w *periodicWorker) Run(ctx context.Context) {
for {
err := w.handler.Do(w.ctx)
if err != nil {
w.log.Error(err)
}
select {
case <-time.After(w.interval):
case <-w.closeCh:
return
case <-ctx.Done():
return
}
}
}
func (w *periodicWorker) Close() error {
close(w.closeCh)
if c, ok := w.handler.(io.Closer); ok {
return c.Close()
}
return nil
}
// cronWorker TODO
type cronWorker struct {
}