func ExampleGo() {
var (
mgr = gls.NewContextManager()
request_id_key = gls.GenSym()
)
MyLog := func() {
if request_id, ok := mgr.GetValue(request_id_key); ok {
fmt.Println("My request id is:", request_id)
} else {
fmt.Println("No request id found")
}
}
mgr.SetValues(gls.Values{request_id_key: "12345"}, func() {
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
MyLog()
}()
wg.Wait()
wg.Add(1)
gls.Go(func() {
defer wg.Done()
MyLog()
})
wg.Wait()
})
// Output: No request id found
// My request id is: 12345
}
func TestContexts(t *testing.T) {
mgr1 := gls.NewContextManager()
mgr2 := gls.NewContextManager()
CheckVal := func(mgr *gls.ContextManager, key, exp_val string) {
val, ok := mgr.GetValue(key)
if len(exp_val) == 0 {
if ok {
t.Fatalf("expected no value for key %s, got %s", key, val)
}
return
}
if !ok {
t.Fatalf("expected value %s for key %s, got no value",
exp_val, key)
}
if exp_val != val {
t.Fatalf("expected value %s for key %s, got %s", exp_val, key,
val)
}
}
Check := func(exp_m1v1, exp_m1v2, exp_m2v1, exp_m2v2 string) {
CheckVal(mgr1, "key1", exp_m1v1)
CheckVal(mgr1, "key2", exp_m1v2)
CheckVal(mgr2, "key1", exp_m2v1)
CheckVal(mgr2, "key2", exp_m2v2)
}
Check("", "", "", "")
mgr2.SetValues(gls.Values{"key1": "val1c"}, func() {
Check("", "", "val1c", "")
mgr1.SetValues(gls.Values{"key1": "val1a"}, func() {
Check("val1a", "", "val1c", "")
mgr1.SetValues(gls.Values{"key2": "val1b"}, func() {
Check("val1a", "val1b", "val1c", "")
var wg sync.WaitGroup
wg.Add(2)
go func() {
defer wg.Done()
Check("", "", "", "")
}()
gls.Go(func() {
defer wg.Done()
Check("val1a", "val1b", "val1c", "")
})
wg.Wait()
Check("val1a", "val1b", "val1c", "")
})
Check("val1a", "", "val1c", "")
})
Check("", "", "val1c", "")
})
Check("", "", "", "")
}