forked from networkservicemesh/sdk
-
Notifications
You must be signed in to change notification settings - Fork 0
/
nse_registry_client.go
90 lines (71 loc) · 2.78 KB
/
nse_registry_client.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
// Copyright (c) 2022-2023 Cisco and/or its affiliates.
//
// SPDX-License-Identifier: Apache-2.0
//
// 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 refresh
import (
"context"
"github.com/edwarnicke/genericsync"
"github.com/golang/protobuf/ptypes/empty"
"google.golang.org/grpc"
"github.com/NikitaSkrynnik/api/pkg/api/registry"
"github.com/NikitaSkrynnik/sdk/pkg/registry/common/begin"
"github.com/NikitaSkrynnik/sdk/pkg/registry/core/next"
"github.com/NikitaSkrynnik/sdk/pkg/tools/clock"
)
type refreshNSEClient struct {
ctx context.Context
genericsync.Map[string, context.CancelFunc]
}
// NewNetworkServiceEndpointRegistryClient creates new NetworkServiceEndpointRegistryClient that will refresh expiration
// time for registered NSEs
func NewNetworkServiceEndpointRegistryClient(ctx context.Context) registry.NetworkServiceEndpointRegistryClient {
return &refreshNSEClient{
ctx: ctx,
}
}
func (c *refreshNSEClient) Register(ctx context.Context, nse *registry.NetworkServiceEndpoint, opts ...grpc.CallOption) (*registry.NetworkServiceEndpoint, error) {
var factory = begin.FromContext(ctx)
resp, err := next.NetworkServiceEndpointRegistryClient(ctx).Register(ctx, nse, opts...)
if err != nil {
return nil, err
}
refreshCtx, cancel := context.WithCancel(c.ctx)
if cancelPrevious, ok := c.LoadAndDelete(nse.Name); ok {
cancelPrevious()
}
c.Store(nse.Name, cancel)
var clockTime = clock.FromContext(ctx)
if resp.GetExpirationTime() != nil {
var refreshCh = clockTime.After(2 * clockTime.Until(resp.GetExpirationTime().AsTime().Local()) / 3)
go func() {
select {
case <-refreshCtx.Done():
return
case <-refreshCh:
<-factory.Register(begin.CancelContext(refreshCtx))
}
}()
}
return resp, nil
}
func (c *refreshNSEClient) Find(ctx context.Context, query *registry.NetworkServiceEndpointQuery, opts ...grpc.CallOption) (registry.NetworkServiceEndpointRegistry_FindClient, error) {
return next.NetworkServiceEndpointRegistryClient(ctx).Find(ctx, query, opts...)
}
func (c *refreshNSEClient) Unregister(ctx context.Context, nse *registry.NetworkServiceEndpoint, opts ...grpc.CallOption) (*empty.Empty, error) {
if v, ok := c.LoadAndDelete(nse.GetName()); ok {
v()
}
return next.NetworkServiceEndpointRegistryClient(ctx).Unregister(ctx, nse, opts...)
}