remove reactor code from ethutil

ethutil/reactor.go

-package ethutil
-
-import (
-	"sync"
-)
-
-type ReactorEvent struct {
-	mut   sync.Mutex
-	event string
-	chans []chan React
-}
-
-// Post the specified reactor resource on the channels
-// currently subscribed
-func (e *ReactorEvent) Post(react React) {
-	e.mut.Lock()
-	defer e.mut.Unlock()
-
-	for _, ch := range e.chans {
-		go func(ch chan React) {
-			ch <- react
-		}(ch)
-	}
-}
-
-// Add a subscriber to this event
-func (e *ReactorEvent) Add(ch chan React) {
-	e.mut.Lock()
-	defer e.mut.Unlock()
-
-	e.chans = append(e.chans, ch)
-}
-
-// Remove a subscriber
-func (e *ReactorEvent) Remove(ch chan React) {
-	e.mut.Lock()
-	defer e.mut.Unlock()
-
-	for i, c := range e.chans {
-		if c == ch {
-			e.chans = append(e.chans[:i], e.chans[i+1:]...)
-		}
-	}
-}
-
-// Basic reactor resource
-type React struct {
-	Resource interface{}
-	Event    string
-}
-
-// The reactor basic engine. Acts as bridge
-// between the events and the subscribers/posters
-type ReactorEngine struct {
-	patterns map[string]*ReactorEvent
-}
-
-func NewReactorEngine() *ReactorEngine {
-	return &ReactorEngine{patterns: make(map[string]*ReactorEvent)}
-}
-
-// Subscribe a channel to the specified event
-func (reactor *ReactorEngine) Subscribe(event string, ch chan React) {
-	ev := reactor.patterns[event]
-	// Create a new event if one isn't available
-	if ev == nil {
-		ev = &ReactorEvent{event: event}
-		reactor.patterns[event] = ev
-	}
-
-	// Add the channel to reactor event handler
-	ev.Add(ch)
-}
-
-func (reactor *ReactorEngine) Unsubscribe(event string, ch chan React) {
-	ev := reactor.patterns[event]
-	if ev != nil {
-		ev.Remove(ch)
-	}
-}
-
-func (reactor *ReactorEngine) Post(event string, resource interface{}) {
-	ev := reactor.patterns[event]
-	if ev != nil {
-		ev.Post(React{Resource: resource, Event: event})
-	}
-}

ethutil/reactor_test.go

-package ethutil
-
-import "testing"
-
-func TestReactorAdd(t *testing.T) {
-	engine := NewReactorEngine()
-	ch := make(chan React)
-	engine.Subscribe("test", ch)
-	if len(engine.patterns) != 1 {
-		t.Error("Expected patterns to be 1, got", len(engine.patterns))
-	}
-}
-
-func TestReactorEvent(t *testing.T) {
-	engine := NewReactorEngine()
-
-	// Buffer 1, so it doesn't block for this test
-	ch := make(chan React, 1)
-	engine.Subscribe("test", ch)
-	engine.Post("test", "hello")
-
-	value := <-ch
-	if val, ok := value.Resource.(string); ok {
-		if val != "hello" {
-			t.Error("Expected Resource to be 'hello', got", val)
-		}
-	} else {
-		t.Error("Unable to cast")
-	}
-}