/
session_manager.go
205 lines (182 loc) · 5.59 KB
/
session_manager.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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
package mnemosyned
import (
"time"
"github.com/opentracing/opentracing-go/log"
"github.com/opentracing/opentracing-go"
"github.com/golang/protobuf/ptypes/empty"
"github.com/piotrkowalczuk/mnemosyne"
"github.com/piotrkowalczuk/mnemosyne/internal/cache"
"github.com/piotrkowalczuk/mnemosyne/internal/cluster"
"github.com/piotrkowalczuk/mnemosyne/internal/constant"
"github.com/piotrkowalczuk/mnemosyne/internal/storage"
"github.com/piotrkowalczuk/mnemosyne/mnemosynerpc"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
)
var (
errMissingAccessToken = status.Errorf(codes.InvalidArgument, "mnemosyned: missing access token")
errMissingSubjectID = status.Errorf(codes.InvalidArgument, "mnemosyned: missing subject accessToken")
errMissingSession = status.Errorf(codes.InvalidArgument, "mnemosyned: missing session")
)
type sessionManagerOpts struct {
addr string
cluster *cluster.Cluster
cache *cache.Cache
ttc time.Duration
logger *zap.Logger
storage storage.Storage
tracer opentracing.Tracer
}
type sessionManager struct {
ttc time.Duration
logger *zap.Logger
storage storage.Storage
tracer opentracing.Tracer
// monitoring
cleanupErrorsTotal prometheus.Counter
sessionManagerList
sessionManagerGet
sessionManagerStart
sessionManagerAbandon
sessionManagerExists
sessionManagerDelete
sessionManagerSetValue
}
func newSessionManager(opts sessionManagerOpts) (*sessionManager, error) {
spanner := spanner{tracer: opts.tracer}
return &sessionManager{
ttc: opts.ttc,
logger: opts.logger,
storage: opts.storage,
tracer: opts.tracer,
cleanupErrorsTotal: prometheus.NewCounter(
prometheus.CounterOpts{
Namespace: constant.Subsystem,
Subsystem: "cleanup",
Name: "errors_total",
Help: "Total number of errors that happen during cleanup.",
},
),
sessionManagerList: sessionManagerList{
spanner: spanner,
storage: opts.storage,
},
sessionManagerGet: sessionManagerGet{
spanner: spanner,
storage: opts.storage,
cache: opts.cache,
cluster: opts.cluster,
logger: opts.logger,
},
sessionManagerStart: sessionManagerStart{
spanner: spanner,
storage: opts.storage,
cache: opts.cache,
cluster: opts.cluster,
logger: opts.logger,
},
sessionManagerAbandon: sessionManagerAbandon{
spanner: spanner,
storage: opts.storage,
cache: opts.cache,
cluster: opts.cluster,
logger: opts.logger,
},
sessionManagerExists: sessionManagerExists{
spanner: spanner,
storage: opts.storage,
cache: opts.cache,
cluster: opts.cluster,
logger: opts.logger,
},
sessionManagerSetValue: sessionManagerSetValue{
spanner: spanner,
storage: opts.storage,
cache: opts.cache,
cluster: opts.cluster,
logger: opts.logger,
},
sessionManagerDelete: sessionManagerDelete{
storage: opts.storage,
cache: opts.cache,
cluster: opts.cluster,
logger: opts.logger,
},
}, nil
}
// Get implements RPCServer interface.
func (sm *sessionManager) Context(ctx context.Context, req *empty.Empty) (*mnemosynerpc.ContextResponse, error) {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return nil, status.Errorf(codes.InvalidArgument, "missing metadata in context, access token cannot be retrieved")
}
if len(md[mnemosyne.AccessTokenMetadataKey]) == 0 {
return nil, status.Errorf(codes.InvalidArgument, "missing access token in metadata")
}
at := md[mnemosyne.AccessTokenMetadataKey][0]
res, err := sm.Get(ctx, &mnemosynerpc.GetRequest{AccessToken: at})
if err != nil {
return nil, err
}
return &mnemosynerpc.ContextResponse{
Session: res.Session,
}, nil
}
func (sm *sessionManager) cleanup(done chan struct{}) {
logger := sm.logger.Named("cleanup")
sm.logger.Info("cleanup routing started")
InfLoop:
for {
span := sm.tracer.StartSpan("sessionManager.cleanup")
select {
case <-time.After(sm.ttc):
t := time.Now()
logger.Debug("session cleanup start", zap.Time("start_at", t))
affected, err := sm.storage.Delete(opentracing.ContextWithSpan(context.Background(), span), "", "", "", nil, &t)
if err != nil {
sm.cleanupErrorsTotal.Inc()
logger.Error("session cleanup failure", zap.Error(err), zap.Time("expire_at_to", t))
span.LogFields(log.String("event", err.Error()))
span.Finish()
return
}
logger.Debug("session cleanup success", zap.Int64("count", affected), zap.Duration("elapsed", time.Since(t)))
case <-done:
logger.Info("cleanup routing terminated")
span.Finish()
break InfLoop
}
span.Finish()
}
}
// Collect implements prometheus Collector interface.
func (sm *sessionManager) Collect(in chan<- prometheus.Metric) {
sm.cleanupErrorsTotal.Collect(in)
}
// Describe implements prometheus Collector interface.
func (sm *sessionManager) Describe(in chan<- *prometheus.Desc) {
sm.cleanupErrorsTotal.Describe(in)
}
type spanner struct {
tracer opentracing.Tracer
}
func (s *spanner) span(ctx context.Context, operationName string, opts ...opentracing.StartSpanOption) (opentracing.Span, context.Context) {
var span opentracing.Span
if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
opts = append(opts, opentracing.ChildOf(parentSpan.Context()))
span = s.getTracer().StartSpan(operationName, opts...)
} else {
span = s.getTracer().StartSpan(operationName, opts...)
}
return span, opentracing.ContextWithSpan(ctx, span)
}
func (s *spanner) getTracer() opentracing.Tracer {
if s.tracer == nil {
return opentracing.GlobalTracer()
}
return s.tracer
}