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connection.go
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connection.go
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/*
* Copyright 2018 The Service Manager 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 notification_connection
import "github.com/lib/pq"
// NotificationConnection is a connection for listening for notifications
//go:generate counterfeiter . NotificationConnection
type NotificationConnection interface {
// Listen starts listening a channel
Listen(channel string) error
// Unlisten stops listening a channel
Unlisten(channel string) error
// Close closes the connection
Close() error
// Ping the remote server to make sure it's alive. Non-nil return value means
// that there is no active connection.
Ping() error
// NotificationChannel returns channel for receiving notifications
NotificationChannel() <-chan *pq.Notification
}