121 lines
2.9 KiB
Go
121 lines
2.9 KiB
Go
// Copyright 2019 Sorint.lab
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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 notification
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import (
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"bufio"
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"bytes"
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"context"
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"encoding/json"
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"io"
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"net/http"
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"path"
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"time"
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rstypes "agola.io/agola/services/runservice/types"
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"go.etcd.io/etcd/clientv3/concurrency"
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errors "golang.org/x/xerrors"
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)
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var (
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etcdRunEventsLockKey = path.Join("locks", "runevents")
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)
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func (n *NotificationService) runEventsHandlerLoop(ctx context.Context) {
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for {
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if err := n.runEventsHandler(ctx); err != nil {
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log.Errorf("err: %+v", err)
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}
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sleepCh := time.NewTimer(1 * time.Second).C
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select {
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case <-ctx.Done():
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return
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case <-sleepCh:
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}
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}
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}
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func (n *NotificationService) runEventsHandler(ctx context.Context) error {
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session, err := concurrency.NewSession(n.e.Client(), concurrency.WithTTL(5), concurrency.WithContext(ctx))
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if err != nil {
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return err
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}
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defer session.Close()
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m := concurrency.NewMutex(session, etcdRunEventsLockKey)
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// TODO(sgotti) find a way to use a trylock so we'll just return if already
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// locked. Currently multiple task updaters will enqueue and start when another
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// finishes (unuseful and consume resources)
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if err := m.Lock(ctx); err != nil {
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return err
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}
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defer func() { _ = m.Unlock(ctx) }()
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resp, err := n.runserviceClient.GetRunEvents(ctx, "")
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if err != nil {
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return err
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}
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if resp.StatusCode != http.StatusOK {
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return errors.Errorf("http status code: %d", resp.StatusCode)
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}
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defer resp.Body.Close()
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br := bufio.NewReader(resp.Body)
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stop := false
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var buf bytes.Buffer
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for {
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if stop {
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return nil
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}
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line, err := br.ReadBytes('\n')
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if err != nil {
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if err != io.EOF {
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return err
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}
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if len(line) == 0 {
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return nil
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}
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stop = true
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}
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switch {
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case bytes.HasPrefix(line, []byte("data: ")):
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buf.Write(line[6:])
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case bytes.Equal(line, []byte("\n")):
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data := buf.Bytes()
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buf.Reset()
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var ev *rstypes.RunEvent
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if err := json.Unmarshal(data, &ev); err != nil {
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return err
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}
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// TODO(sgotti)
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// this is just a basic handling. Improve it to store received events and
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// their status to etcd so we can also do more logic like retrying and handle
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// multiple kind of notifications (email etc...)
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if err := n.updateCommitStatus(ctx, ev); err != nil {
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log.Infof("failed to update commit status: %v", err)
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}
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default:
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return errors.Errorf("wrong data")
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}
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}
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}
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