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service_instances_changed_listener.go
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/
service_instances_changed_listener.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 registry
import (
"reflect"
)
import (
gxset "github.com/dubbogo/gost/container/set"
)
import (
"dubbo.apache.org/dubbo-go/v3/common/observer"
)
// ServiceInstancesChangedListener The Service Discovery Changed Event Listener
type ServiceInstancesChangedListener interface {
// OnEvent on ServiceInstancesChangedEvent the service instances change event
OnEvent(e observer.Event) error
// AddListenerAndNotify add notify listener and notify to listen service event
AddListenerAndNotify(serviceKey string, notify NotifyListener)
// RemoveListener remove notify listener
RemoveListener(serviceKey string)
// GetServiceNames return all listener service names
GetServiceNames() *gxset.HashSet
// Accept return true if the name is the same
Accept(e observer.Event) bool
// GetEventType returns ServiceInstancesChangedEvent
GetEventType() reflect.Type
// GetPriority returns -1, it will be the first invoked listener
GetPriority() int
}