111 lines
3.3 KiB
Go
111 lines
3.3 KiB
Go
// Copyright 2017 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package simulations
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
)
|
|
|
|
// EventType is the type of event emitted by a simulation network
|
|
type EventType string
|
|
|
|
const (
|
|
// EventTypeNode is the type of event emitted when a node is either
|
|
// created, started or stopped
|
|
EventTypeNode EventType = "node"
|
|
|
|
// EventTypeConn is the type of event emitted when a connection is
|
|
// either established or dropped between two nodes
|
|
EventTypeConn EventType = "conn"
|
|
|
|
// EventTypeMsg is the type of event emitted when a p2p message it
|
|
// sent between two nodes
|
|
EventTypeMsg EventType = "msg"
|
|
)
|
|
|
|
// Event is an event emitted by a simulation network
|
|
type Event struct {
|
|
// Type is the type of the event
|
|
Type EventType `json:"type"`
|
|
|
|
// Time is the time the event happened
|
|
Time time.Time `json:"time"`
|
|
|
|
// Control indicates whether the event is the result of a controlled
|
|
// action in the network
|
|
Control bool `json:"control"`
|
|
|
|
// Node is set if the type is EventTypeNode
|
|
Node *Node `json:"node,omitempty"`
|
|
|
|
// Conn is set if the type is EventTypeConn
|
|
Conn *Conn `json:"conn,omitempty"`
|
|
|
|
// Msg is set if the type is EventTypeMsg
|
|
Msg *Msg `json:"msg,omitempty"`
|
|
|
|
//Optionally provide data (currently for simulation frontends only)
|
|
Data interface{} `json:"data"`
|
|
}
|
|
|
|
// NewEvent creates a new event for the given object which should be either a
|
|
// Node, Conn or Msg.
|
|
//
|
|
// The object is copied so that the event represents the state of the object
|
|
// when NewEvent is called.
|
|
func NewEvent(v interface{}) *Event {
|
|
event := &Event{Time: time.Now()}
|
|
switch v := v.(type) {
|
|
case *Node:
|
|
event.Type = EventTypeNode
|
|
event.Node = v.copy()
|
|
case *Conn:
|
|
event.Type = EventTypeConn
|
|
conn := *v
|
|
event.Conn = &conn
|
|
case *Msg:
|
|
event.Type = EventTypeMsg
|
|
msg := *v
|
|
event.Msg = &msg
|
|
default:
|
|
panic(fmt.Sprintf("invalid event type: %T", v))
|
|
}
|
|
return event
|
|
}
|
|
|
|
// ControlEvent creates a new control event
|
|
func ControlEvent(v interface{}) *Event {
|
|
event := NewEvent(v)
|
|
event.Control = true
|
|
return event
|
|
}
|
|
|
|
// String returns the string representation of the event
|
|
func (e *Event) String() string {
|
|
switch e.Type {
|
|
case EventTypeNode:
|
|
return fmt.Sprintf("<node-event> id: %s up: %t", e.Node.ID().TerminalString(), e.Node.Up())
|
|
case EventTypeConn:
|
|
return fmt.Sprintf("<conn-event> nodes: %s->%s up: %t", e.Conn.One.TerminalString(), e.Conn.Other.TerminalString(), e.Conn.Up)
|
|
case EventTypeMsg:
|
|
return fmt.Sprintf("<msg-event> nodes: %s->%s proto: %s, code: %d, received: %t", e.Msg.One.TerminalString(), e.Msg.Other.TerminalString(), e.Msg.Protocol, e.Msg.Code, e.Msg.Received)
|
|
default:
|
|
return ""
|
|
}
|
|
}
|