session.go

package servicebus

//	MIT License
//
//	Copyright (c) Microsoft Corporation. All rights reserved.
//
//	Permission is hereby granted, free of charge, to any person obtaining a copy
//	of this software and associated documentation files (the "Software"), to deal
//	in the Software without restriction, including without limitation the rights
//	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//	copies of the Software, and to permit persons to whom the Software is
//	furnished to do so, subject to the following conditions:
//
//	The above copyright notice and this permission notice shall be included in all
//	copies or substantial portions of the Software.
//
//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//	SOFTWARE

import (
	"sync/atomic"

	"github.com/Azure/azure-amqp-common-go/uuid"
	"pack.ag/amqp"
)

type (
	// session is a wrapper for the AMQP session with some added information to help with Service Bus messaging
	session struct {
		*amqp.Session
		SessionID string
		counter   uint32
	}
)

// newSession is a constructor for a Service Bus session which will pre-populate the SessionID with a new UUID
func newSession(amqpSession *amqp.Session) (*session, error) {
	id, err := uuid.NewV4()
	if err != nil {
		return nil, err
	}

	return &session{
		Session:   amqpSession,
		SessionID: id.String(),
		counter:   0,
	}, nil
}

// getNext gets and increments the next group sequence number for the session
func (s *session) getNext() uint32 {
	return atomic.AddUint32(&s.counter, 1)
}

func (s *session) String() string {
	return s.SessionID
}