services/ws/event_source_test.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 package ws
   6
   7 import (
   8         "database/sql"
   9         "fmt"
  10         "sync"
  11         "time"
  12
  13         "git.arvados.org/arvados.git/sdk/go/arvados"
  14         "git.arvados.org/arvados.git/sdk/go/ctxlog"
  15         "github.com/prometheus/client_golang/prometheus"
  16         check "gopkg.in/check.v1"
  17 )
  18
  19 var _ = check.Suite(&eventSourceSuite{})
  20
  21 type eventSourceSuite struct{}
  22
  23 func testDBConfig() arvados.PostgreSQLConnection {
  24         cfg, err := arvados.GetConfig(arvados.DefaultConfigFile)
  25         if err != nil {
  26                 panic(err)
  27         }
  28         cc, err := cfg.GetCluster("zzzzz")
  29         if err != nil {
  30                 panic(err)
  31         }
  32         return cc.PostgreSQL.Connection
  33 }
  34
  35 func testDB() *sql.DB {
  36         db, err := sql.Open("postgres", testDBConfig().String())
  37         if err != nil {
  38                 panic(err)
  39         }
  40         return db
  41 }
  42
  43 func (*eventSourceSuite) TestEventSource(c *check.C) {
  44         cfg := testDBConfig()
  45         db := testDB()
  46         pges := &pgEventSource{
  47                 DataSource: cfg.String(),
  48                 QueueSize:  4,
  49                 Logger:     ctxlog.TestLogger(c),
  50                 Reg:        prometheus.NewRegistry(),
  51         }
  52         go pges.Run()
  53         sinks := make([]eventSink, 18)
  54         for i := range sinks {
  55                 sinks[i] = pges.NewSink()
  56         }
  57
  58         pges.WaitReady()
  59         defer pges.cancel()
  60
  61         done := make(chan bool, 1)
  62
  63         go func() {
  64                 for i := range sinks {
  65                         _, err := db.Exec(fmt.Sprintf(`NOTIFY logs, '%d'`, i))
  66                         if err != nil {
  67                                 done <- true
  68                                 c.Fatal(err)
  69                                 return
  70                         }
  71                 }
  72         }()
  73
  74         var wg sync.WaitGroup
  75         wg.Add(len(sinks))
  76         for si, s := range sinks {
  77                 go func(si int, s eventSink) {
  78                         defer wg.Done()
  79                         defer sinks[si].Stop()
  80                         for i := 0; i <= si; i++ {
  81                                 ev := <-sinks[si].Channel()
  82                                 c.Logf("sink %d received event %d", si, i)
  83                                 c.Check(ev.LogID, check.Equals, int64(i))
  84                                 row := ev.Detail()
  85                                 if i == 0 {
  86                                         // no matching row, null event
  87                                         c.Check(row, check.IsNil)
  88                                 } else {
  89                                         c.Check(row, check.NotNil)
  90                                         c.Check(row.ID, check.Equals, int64(i))
  91                                         c.Check(row.UUID, check.Not(check.Equals), "")
  92                                 }
  93                         }
  94                 }(si, s)
  95         }
  96         go func() {
  97                 wg.Wait()
  98                 done <- true
  99         }()
 100
 101         select {
 102         case <-done:
 103         case <-time.After(10 * time.Second):
 104                 c.Fatal("timed out")
 105         }
 106
 107         c.Check(pges.DBHealth(), check.IsNil)
 108 }