forked from grpc/grpc-go
/
client_watchers_lds.go
47 lines (42 loc) · 1.29 KB
/
client_watchers_lds.go
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/*
*
* Copyright 2020 gRPC authors.
*
* 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 client
import (
"time"
)
type ldsUpdate struct {
routeName string
}
type ldsCallbackFunc func(ldsUpdate, error)
// watchLDS starts a listener watcher for the service..
//
// Note that during race (e.g. an xDS response is received while the user is
// calling cancel()), there's a small window where the callback can be called
// after the watcher is canceled. The caller needs to handle this case.
func (c *Client) watchLDS(serviceName string, cb ldsCallbackFunc) (cancel func()) {
wi := &watchInfo{
c: c,
typeURL: ldsURL,
target: serviceName,
ldsCallback: cb,
}
wi.expiryTimer = time.AfterFunc(defaultWatchExpiryTimeout, func() {
wi.timeout()
})
return c.watch(wi)
}