134 lines
4.4 KiB
Go
134 lines
4.4 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Contains a batch of utility type declarations used by the tests. As the node
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// operates on unique types, a lot of them are needed to check various features.
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package node
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import (
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"reflect"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/rpc"
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)
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// NoopService is a trivial implementation of the Service interface.
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type NoopService struct{}
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func (s *NoopService) Protocols() []p2p.Protocol { return nil }
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func (s *NoopService) APIs() []rpc.API { return nil }
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func (s *NoopService) Start(*p2p.Server) error { return nil }
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func (s *NoopService) Stop() error { return nil }
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func NewNoopService(*ServiceContext) (Service, error) { return new(NoopService), nil }
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// Set of services all wrapping the base NoopService resulting in the same method
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// signatures but different outer types.
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type NoopServiceA struct{ NoopService }
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type NoopServiceB struct{ NoopService }
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type NoopServiceC struct{ NoopService }
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func NewNoopServiceA(*ServiceContext) (Service, error) { return new(NoopServiceA), nil }
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func NewNoopServiceB(*ServiceContext) (Service, error) { return new(NoopServiceB), nil }
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func NewNoopServiceC(*ServiceContext) (Service, error) { return new(NoopServiceC), nil }
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// InstrumentedService is an implementation of Service for which all interface
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// methods can be instrumented both return value as well as event hook wise.
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type InstrumentedService struct {
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protocols []p2p.Protocol
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apis []rpc.API
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start error
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stop error
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protocolsHook func()
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startHook func(*p2p.Server)
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stopHook func()
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}
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func NewInstrumentedService(*ServiceContext) (Service, error) { return new(InstrumentedService), nil }
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func (s *InstrumentedService) Protocols() []p2p.Protocol {
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if s.protocolsHook != nil {
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s.protocolsHook()
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}
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return s.protocols
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}
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func (s *InstrumentedService) APIs() []rpc.API {
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return s.apis
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}
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func (s *InstrumentedService) Start(server *p2p.Server) error {
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if s.startHook != nil {
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s.startHook(server)
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}
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return s.start
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}
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func (s *InstrumentedService) Stop() error {
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if s.stopHook != nil {
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s.stopHook()
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}
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return s.stop
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}
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// InstrumentingWrapper is a method to specialize a service constructor returning
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// a generic InstrumentedService into one returning a wrapping specific one.
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type InstrumentingWrapper func(base ServiceConstructor) ServiceConstructor
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func InstrumentingWrapperMaker(base ServiceConstructor, kind reflect.Type) ServiceConstructor {
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return func(ctx *ServiceContext) (Service, error) {
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obj, err := base(ctx)
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if err != nil {
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return nil, err
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}
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wrapper := reflect.New(kind)
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wrapper.Elem().Field(0).Set(reflect.ValueOf(obj).Elem())
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return wrapper.Interface().(Service), nil
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}
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}
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// Set of services all wrapping the base InstrumentedService resulting in the
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// same method signatures but different outer types.
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type InstrumentedServiceA struct{ InstrumentedService }
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type InstrumentedServiceB struct{ InstrumentedService }
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type InstrumentedServiceC struct{ InstrumentedService }
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func InstrumentedServiceMakerA(base ServiceConstructor) ServiceConstructor {
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return InstrumentingWrapperMaker(base, reflect.TypeOf(InstrumentedServiceA{}))
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}
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func InstrumentedServiceMakerB(base ServiceConstructor) ServiceConstructor {
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return InstrumentingWrapperMaker(base, reflect.TypeOf(InstrumentedServiceB{}))
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}
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func InstrumentedServiceMakerC(base ServiceConstructor) ServiceConstructor {
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return InstrumentingWrapperMaker(base, reflect.TypeOf(InstrumentedServiceC{}))
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}
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// OneMethodAPI is a single-method API handler to be returned by test services.
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type OneMethodAPI struct {
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fun func()
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}
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func (api *OneMethodAPI) TheOneMethod() {
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if api.fun != nil {
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api.fun()
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}
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}
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