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Don't automatically do concurrency for users

Browse Source 
http://talks.golang.org/2013/bestpractices.slide#25
This commit is contained in:
Stephen McQuay 2014-03-31 21:15:34 -07:00
parent 0d11b8a0ba
commit 8b52f93ca5
2 changed files with 11 additions and 9 deletions
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13
id.go
View File

@ -18,15 +18,16 @@ type IdGenerator struct {
} }
func NewIdGenerator() *IdGenerator { func NewIdGenerator() *IdGenerator {
g := IdGenerator{} return &IdGenerator{
g.id = make(chan int64) id: make(chan int64),
go func() { }
}
func (idg *IdGenerator) Run() {
var i int64 var i int64
for i = 0; ; i++ { for i = 0; ; i++ {
g.id <- i idg.id <- i
} }
}()
return &g
} }
func (id *IdGenerator) Hash() string { func (id *IdGenerator) Hash() string {

1
id_test.go
View File

@ -8,6 +8,7 @@ func TestIDGenerator(t *testing.T) {
cache := make(map[string]bool) cache := make(map[string]bool)
var cur string var cur string
gg := NewIdGenerator() gg := NewIdGenerator()
go gg.Run()
for i := 0; i < 10000; i++ { for i := 0; i < 10000; i++ {
cur = gg.Hash() cur = gg.Hash()
if _, ok := cache[cur]; ok { if _, ok := cache[cur]; ok {