/
event.go
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/
event.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 dubbo
import (
"fmt"
"math/rand"
"time"
"mosn.io/pkg/registry/dubbo/common"
"mosn.io/pkg/registry/dubbo/remoting"
)
func init() {
rand.Seed(time.Now().UnixNano())
}
// ////////////////////////////////////////
// service event
// ////////////////////////////////////////
// ServiceEvent ...
type ServiceEvent struct {
Action remoting.EventType
Service common.URL
}
// String return the description of event
func (e ServiceEvent) String() string {
return fmt.Sprintf("ServiceEvent{Action{%s}, Path{%s}}", e.Action, e.Service)
}
// Event is align with Event interface in Java.
// it's the top abstraction
// Align with 2.7.5
type Event interface {
fmt.Stringer
GetSource() interface{}
GetTimestamp() time.Time
}
// baseEvent is the base implementation of Event
// You should never use it directly
type baseEvent struct {
source interface{}
timestamp time.Time
}
// GetSource return the source
func (b *baseEvent) GetSource() interface{} {
return b.source
}
// GetTimestamp return the timestamp when the event is created
func (b *baseEvent) GetTimestamp() time.Time {
return b.timestamp
}
// String return a human readable string representing this event
func (b *baseEvent) String() string {
return fmt.Sprintf("baseEvent[source = %#v]", b.source)
}
func newBaseEvent(source interface{}) *baseEvent {
return &baseEvent{
source: source,
timestamp: time.Now(),
}
}
// ServiceInstancesChangedEvent represents service instances make some changing
type ServiceInstancesChangedEvent struct {
baseEvent
ServiceName string
Instances []ServiceInstance
}
// String return the description of the event
func (s *ServiceInstancesChangedEvent) String() string {
return fmt.Sprintf("ServiceInstancesChangedEvent[source=%s]", s.ServiceName)
}
// NewServiceInstancesChangedEvent will create the ServiceInstanceChangedEvent instance
func NewServiceInstancesChangedEvent(serviceName string, instances []ServiceInstance) *ServiceInstancesChangedEvent {
return &ServiceInstancesChangedEvent{
baseEvent: baseEvent{
source: serviceName,
timestamp: time.Now(),
},
ServiceName: serviceName,
Instances: instances,
}
}