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event/filter: delete unused package (#18063)

This commit is contained in:
Felix Lange 2018-11-08 13:26:29 +01:00 committed by Péter Szilágyi
parent d0675e9d9c
commit 9313fa63f9
3 changed files with 0 additions and 203 deletions
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95
event/filter/filter.go
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@ -1,95 +0,0 @@
// Copyright 2014 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 filter implements event filters.
package filter
import "reflect"
type Filter interface {
Compare(Filter) bool
Trigger(data interface{})
}
type FilterEvent struct {
filter Filter
data interface{}
}
type Filters struct {
id int
watchers map[int]Filter
ch chan FilterEvent
quit chan struct{}
}
func New() *Filters {
return &Filters{
ch: make(chan FilterEvent),
watchers: make(map[int]Filter),
quit: make(chan struct{}),
}
}
func (f *Filters) Start() {
go f.loop()
}
func (f *Filters) Stop() {
close(f.quit)
}
func (f *Filters) Notify(filter Filter, data interface{}) {
f.ch <- FilterEvent{filter, data}
}
func (f *Filters) Install(watcher Filter) int {
f.watchers[f.id] = watcher
f.id++
return f.id - 1
}
func (f *Filters) Uninstall(id int) {
delete(f.watchers, id)
}
func (f *Filters) loop() {
out:
for {
select {
case <-f.quit:
break out
case event := <-f.ch:
for _, watcher := range f.watchers {
if reflect.TypeOf(watcher) == reflect.TypeOf(event.filter) {
if watcher.Compare(event.filter) {
watcher.Trigger(event.data)
}
}
}
}
}
}
func (f *Filters) Match(a, b Filter) bool {
return reflect.TypeOf(a) == reflect.TypeOf(b) && a.Compare(b)
}
func (f *Filters) Get(i int) Filter {
return f.watchers[i]
}

60
event/filter/filter_test.go
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@ -1,60 +0,0 @@
// Copyright 2014 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 filter
import (
"testing"
"time"
)
// Simple test to check if baseline matching/mismatching filtering works.
func TestFilters(t *testing.T) {
fm := New()
fm.Start()
// Register two filters to catch posted data
first := make(chan struct{})
fm.Install(Generic{
Str1: "hello",
Fn: func(data interface{}) {
first <- struct{}{}
},
})
second := make(chan struct{})
fm.Install(Generic{
Str1: "hello1",
Str2: "hello",
Fn: func(data interface{}) {
second <- struct{}{}
},
})
// Post an event that should only match the first filter
fm.Notify(Generic{Str1: "hello"}, true)
fm.Stop()
// Ensure only the mathcing filters fire
select {
case <-first:
case <-time.After(100 * time.Millisecond):
t.Error("matching filter timed out")
}
select {
case <-second:
t.Error("mismatching filter fired")
case <-time.After(100 * time.Millisecond):
}
}

48
event/filter/generic_filter.go
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@ -1,48 +0,0 @@
// Copyright 2014 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 filter
type Generic struct {
Str1, Str2, Str3 string
Data map[string]struct{}
Fn func(data interface{})
}
// self = registered, f = incoming
func (self Generic) Compare(f Filter) bool {
var strMatch = true
filter := f.(Generic)
if (len(self.Str1) > 0 && filter.Str1 != self.Str1) ||
(len(self.Str2) > 0 && filter.Str2 != self.Str2) ||
(len(self.Str3) > 0 && filter.Str3 != self.Str3) {
strMatch = false
}
for k := range self.Data {
if _, ok := filter.Data[k]; !ok {
return false
}
}
return strMatch
}
func (self Generic) Trigger(data interface{}) {
self.Fn(data)
}