forked from cloudfoundry/cli
/
logs_command.go
170 lines (141 loc) · 3.82 KB
/
logs_command.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
package v7
import (
"os"
"os/signal"
"time"
"code.cloudfoundry.org/cli/actor/actionerror"
"code.cloudfoundry.org/cli/actor/sharedaction"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccv3"
"code.cloudfoundry.org/cli/command"
"code.cloudfoundry.org/cli/command/flag"
)
type LogsCommand struct {
BaseCommand
RequiredArgs flag.AppName `positional-args:"yes"`
Recent bool `long:"recent" description:"Dump recent logs instead of tailing"`
usage interface{} `usage:"CF_NAME logs APP_NAME"`
relatedCommands interface{} `related_commands:"app, apps, ssh"`
CC_Client *ccv3.Client
LogCacheClient sharedaction.LogCacheClient
}
func (cmd *LogsCommand) Setup(config command.Config, ui command.UI) error {
err := cmd.BaseCommand.Setup(config, ui)
if err != nil {
return err
}
cmd.LogCacheClient = command.NewLogCacheClient(cmd.cloudControllerClient.Info.LogCache(), config, ui)
return nil
}
func (cmd LogsCommand) Execute(args []string) error {
err := cmd.SharedActor.CheckTarget(true, true)
if err != nil {
return err
}
user, err := cmd.Config.CurrentUser()
if err != nil {
return err
}
cmd.UI.DisplayTextWithFlavor("Retrieving logs for app {{.AppName}} in org {{.OrgName}} / space {{.SpaceName}} as {{.Username}}...",
map[string]interface{}{
"AppName": cmd.RequiredArgs.AppName,
"OrgName": cmd.Config.TargetedOrganization().Name,
"SpaceName": cmd.Config.TargetedSpace().Name,
"Username": user.Name,
})
cmd.UI.DisplayNewline()
if cmd.Recent {
return cmd.displayRecentLogs()
}
stop := make(chan struct{})
stoppedRefreshing := make(chan struct{})
stoppedOutputtingRefreshErrors := make(chan struct{})
err = cmd.refreshTokenPeriodically(stop, stoppedRefreshing, stoppedOutputtingRefreshErrors)
if err != nil {
return err
}
err = cmd.streamLogs()
close(stop)
<-stoppedRefreshing
<-stoppedOutputtingRefreshErrors
return err
}
func (cmd LogsCommand) displayRecentLogs() error {
messages, warnings, err := cmd.Actor.GetRecentLogsForApplicationByNameAndSpace(
cmd.RequiredArgs.AppName,
cmd.Config.TargetedSpace().GUID,
cmd.LogCacheClient,
)
for _, message := range messages {
cmd.UI.DisplayLogMessage(message, true)
}
cmd.UI.DisplayWarnings(warnings)
return err
}
func (cmd LogsCommand) refreshTokenPeriodically(
stop chan struct{},
stoppedRefreshing chan struct{},
stoppedOutputtingRefreshErrors chan struct{}) error {
tokenRefreshErrors, err := cmd.Actor.ScheduleTokenRefresh(time.After, stop, stoppedRefreshing)
if err != nil {
return err
}
go func() {
defer close(stoppedOutputtingRefreshErrors)
for {
select {
case err := <-tokenRefreshErrors:
cmd.UI.DisplayError(err)
case <-stop:
return
}
}
}()
return nil
}
func (cmd LogsCommand) handleLogErr(logErr error) {
switch logErr.(type) {
case actionerror.LogCacheTimeoutError:
cmd.UI.DisplayWarning("timeout connecting to log server, no log will be shown")
default:
cmd.UI.DisplayWarning("Failed to retrieve logs from Log Cache: {{.Error}}", map[string]interface{}{
"Error": logErr,
})
}
}
func (cmd LogsCommand) streamLogs() error {
messages, logErrs, stopStreaming, warnings, err := cmd.Actor.GetStreamingLogsForApplicationByNameAndSpace(
cmd.RequiredArgs.AppName,
cmd.Config.TargetedSpace().GUID,
cmd.LogCacheClient,
)
cmd.UI.DisplayWarnings(warnings)
if err != nil {
return err
}
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
defer stopStreaming()
var messagesClosed, errLogsClosed bool
for {
select {
case message, ok := <-messages:
if !ok {
messagesClosed = true
break
}
cmd.UI.DisplayLogMessage(message, true)
case logErr, ok := <-logErrs:
if !ok {
errLogsClosed = true
break
}
cmd.handleLogErr(logErr)
case <-c:
return nil
}
if messagesClosed && errLogsClosed {
break
}
}
return nil
}