Official Go implementation of the Ethereum protocol
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go-ethereum/swarm/network/simulation/service.go

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// Copyright 2018 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 simulation
import (
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
)
// Service returns a single Service by name on a particular node
// with provided id.
func (s *Simulation) Service(name string, id enode.ID) node.Service {
simNode, ok := s.Net.GetNode(id).Node.(*adapters.SimNode)
if !ok {
return nil
}
services := simNode.ServiceMap()
if len(services) == 0 {
return nil
}
return services[name]
}
// RandomService returns a single Service by name on a
// randomly chosen node that is up.
func (s *Simulation) RandomService(name string) node.Service {
n := s.Net.GetRandomUpNode().Node.(*adapters.SimNode)
if n == nil {
return nil
}
return n.Service(name)
}
// Services returns all services with a provided name
// from nodes that are up.
func (s *Simulation) Services(name string) (services map[enode.ID]node.Service) {
nodes := s.Net.GetNodes()
services = make(map[enode.ID]node.Service)
for _, node := range nodes {
if !node.Up {
continue
}
simNode, ok := node.Node.(*adapters.SimNode)
if !ok {
continue
}
services[node.ID()] = simNode.Service(name)
}
return services
}