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Send REFRESH_REQUESTED if vl3 dnsServerIP is updated
Signed-off-by: Artem Glazychev <[email protected]>
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41 changes: 41 additions & 0 deletions
41
pkg/networkservice/connectioncontext/dnscontext/vl3dns/metadata.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // Copyright (c) 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. | ||
|
|
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| package vl3dns | ||
|
|
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| import ( | ||
| "context" | ||
|
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| "github.com/networkservicemesh/sdk/pkg/networkservice/utils/metadata" | ||
| ) | ||
|
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| type key struct{} | ||
|
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| // storeNotifierCancelFunc sets the context.CancelFunc stored in per Connection.Id metadata. | ||
| func storeNotifierCancelFunc(ctx context.Context, cancel context.CancelFunc) { | ||
| metadata.Map(ctx, true).Store(key{}, cancel) | ||
| } | ||
|
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| // loadAndDeleteNotifierCancelFunc deletes the context.CancelFunc stored in per Connection.Id metadata, | ||
| // returning the previous value if any. The loaded result reports whether the key was present. | ||
| func loadAndDeleteNotifierCancelFunc(ctx context.Context) (value context.CancelFunc, ok bool) { | ||
| rawValue, ok := metadata.Map(ctx, true).LoadAndDelete(key{}) | ||
| if !ok { | ||
| return | ||
| } | ||
| value, ok = rawValue.(context.CancelFunc) | ||
| return value, ok | ||
| } |
68 changes: 68 additions & 0 deletions
68
pkg/networkservice/connectioncontext/dnscontext/vl3dns/notifier.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| // Copyright (c) 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. | ||
|
|
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| package vl3dns | ||
|
|
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| import ( | ||
| "github.com/edwarnicke/serialize" | ||
| ) | ||
|
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| // notifier - notifies all subscribers of an event | ||
| type vl3DNSNotifier struct { | ||
| executor serialize.Executor | ||
| channels map[string]chan struct{} | ||
| } | ||
|
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| func newNotifier() *vl3DNSNotifier { | ||
| return &vl3DNSNotifier{ | ||
| channels: make(map[string]chan struct{}), | ||
| } | ||
| } | ||
|
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| func (n *vl3DNSNotifier) subscribe(id string) <-chan struct{} { | ||
| if n == nil { | ||
| return nil | ||
| } | ||
| var r chan struct{} | ||
| <-n.executor.AsyncExec(func() { | ||
| n.channels[id] = make(chan struct{}) | ||
| r = n.channels[id] | ||
| }) | ||
| return r | ||
| } | ||
|
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| func (n *vl3DNSNotifier) unsubscribe(id string) { | ||
| if n == nil { | ||
| return | ||
| } | ||
| <-n.executor.AsyncExec(func() { | ||
| if v, ok := n.channels[id]; ok { | ||
| close(v) | ||
| } | ||
| delete(n.channels, id) | ||
| }) | ||
| } | ||
|
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| func (n *vl3DNSNotifier) notify() { | ||
| if n == nil { | ||
| return | ||
| } | ||
| <-n.executor.AsyncExec(func() { | ||
| for _, v := range n.channels { | ||
| v <- struct{}{} | ||
| } | ||
| }) | ||
| } |
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