observer

Documentation

Overview

ZooBC Copyright (C) 2020 Quasisoft Limited - Hong Kong This file is part of ZooBC <https://github.com/zoobc/zoobc-core>

ZooBC is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

ZooBC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with ZooBC. If not, see <http://www.gnu.org/licenses/>.

Additional Permission Under GNU GPL Version 3 section 7. As the special exception permitted under Section 7b, c and e, in respect with the Author’s copyright, please refer to this section:

1. You are free to convey this Program according to GNU GPL Version 3, as long as you respect and comply with the Author’s copyright by showing in its user interface an Appropriate Notice that the derivate program and its source code are “powered by ZooBC”. This is an acknowledgement for the copyright holder, ZooBC, as the implementation of appreciation of the exclusive right of the creator and to avoid any circumvention on the rights under trademark law for use of some trade names, trademarks, or service marks.

2. Complying to the GNU GPL Version 3, you may distribute the program without any permission from the Author. However a prior notification to the authors will be appreciated.

ZooBC is architected by Roberto Capodieci & Barton Johnston

contact us at roberto.capodieci[at]blockchainzoo.com
and barton.johnston[at]blockchainzoo.com

Core developers that contributed to the current implementation of the software are:

Ahmad Ali Abdilah ahmad.abdilah[at]blockchainzoo.com
Allan Bintoro allan.bintoro[at]blockchainzoo.com
Andy Herman
Gede Sukra
Ketut Ariasa
Nawi Kartini nawi.kartini[at]blockchainzoo.com
Stefano Galassi stefano.galassi[at]blockchainzoo.com

IMPORTANT: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

ZooBC Copyright (C) 2020 Quasisoft Limited - Hong Kong This file is part of ZooBC <https://github.com/zoobc/zoobc-core>

ZooBC is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

ZooBC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with ZooBC. If not, see <http://www.gnu.org/licenses/>.

Additional Permission Under GNU GPL Version 3 section 7. As the special exception permitted under Section 7b, c and e, in respect with the Author’s copyright, please refer to this section:

1. You are free to convey this Program according to GNU GPL Version 3, as long as you respect and comply with the Author’s copyright by showing in its user interface an Appropriate Notice that the derivate program and its source code are “powered by ZooBC”. This is an acknowledgement for the copyright holder, ZooBC, as the implementation of appreciation of the exclusive right of the creator and to avoid any circumvention on the rights under trademark law for use of some trade names, trademarks, or service marks.

2. Complying to the GNU GPL Version 3, you may distribute the program without any permission from the Author. However a prior notification to the authors will be appreciated.

ZooBC is architected by Roberto Capodieci & Barton Johnston

contact us at roberto.capodieci[at]blockchainzoo.com
and barton.johnston[at]blockchainzoo.com

Core developers that contributed to the current implementation of the software are:

Ahmad Ali Abdilah ahmad.abdilah[at]blockchainzoo.com
Allan Bintoro allan.bintoro[at]blockchainzoo.com
Andy Herman
Gede Sukra
Ketut Ariasa
Nawi Kartini nawi.kartini[at]blockchainzoo.com
Stefano Galassi stefano.galassi[at]blockchainzoo.com

IMPORTANT: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

Index

• type Event
• type Listener
• type Observer
  • func NewObserver() *Observer
  • func (o *Observer) AddListener(event Event, listener Listener)
  • func (o *Observer) Notify(event Event, data interface{}, args ...interface{})
  • func (o *Observer) Remove(event Event)
• type OnNotify

Types

type Event

type Event string

const (
	// block listener event
	BlockPushed                Event = "BlockEvent.BlockPushed"
	BroadcastBlock             Event = "BlockEvent.BroadcastBlock"
	BlockRequestTransactions   Event = "BlockEvent.BlockRequestTransaction"
	BlockTransactionsRequested Event = "BlockEvent.BlockTransactionsRequested"

	// transaction listener event
	TransactionAdded                   Event = "TransactionEvent.TransactionAdded"
	TransactionReceived                Event = "TransactionEvent.TransactionReceived"
	ReceivedBlockTransactionsValidated Event = "TransactionEvent.ReceivedBlockTransactionsValidated"
	SendBlockTransactions              Event = "TransactionEvent.SendBlockTransactions"
)

type Listener

type Listener struct {
	OnNotify OnNotify
}

type Observer

type Observer struct {
	Listeners map[Event][]Listener
}

func NewObserver

func NewObserver() *Observer

NewObserver get single global instance of Observer

func (*Observer) AddListener

func (o *Observer) AddListener(event Event, listener Listener)

AddListener add new listener in observer

func (*Observer) Notify

func (o *Observer) Notify(event Event, data interface{}, args ...interface{})

Notify send data & arg to registered listener based on event

func (*Observer) Remove

func (o *Observer) Remove(event Event)

Remove remove registered listener in observer

type OnNotify

type OnNotify func(data interface{}, args ...interface{})