blob: f55251e2809a43414fd1862752d55c43bdd4d4ae (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
#include "dnsresolver.h"
#include <library/cpp/actors/core/hfunc.h>
namespace NActors {
namespace NDnsResolver {
class TOnDemandDnsResolver : public TActor<TOnDemandDnsResolver> {
public:
TOnDemandDnsResolver(TOnDemandDnsResolverOptions options)
: TActor(&TThis::StateWork)
, Options(std::move(options))
{ }
static constexpr EActivityType ActorActivityType() {
return DNS_RESOLVER;
}
private:
STRICT_STFUNC(StateWork, {
cFunc(TEvents::TEvPoison::EventType, PassAway);
fFunc(TEvDns::TEvGetHostByName::EventType, Forward);
fFunc(TEvDns::TEvGetAddr::EventType, Forward);
});
void Forward(STATEFN_SIG) {
ev->Rewrite(ev->GetTypeRewrite(), GetUpstream());
TActivationContext::Send(ev.Release());
}
private:
TActorId GetUpstream() {
if (Y_UNLIKELY(!CachingResolverId)) {
if (Y_LIKELY(!SimpleResolverId)) {
SimpleResolverId = RegisterWithSameMailbox(CreateSimpleDnsResolver(Options));
}
CachingResolverId = RegisterWithSameMailbox(CreateCachingDnsResolver(SimpleResolverId, Options));
}
return CachingResolverId;
}
void PassAway() override {
if (CachingResolverId) {
Send(CachingResolverId, new TEvents::TEvPoison);
CachingResolverId = { };
}
if (SimpleResolverId) {
Send(SimpleResolverId, new TEvents::TEvPoison);
SimpleResolverId = { };
}
}
private:
TOnDemandDnsResolverOptions Options;
TActorId SimpleResolverId;
TActorId CachingResolverId;
};
IActor* CreateOnDemandDnsResolver(TOnDemandDnsResolverOptions options) {
return new TOnDemandDnsResolver(std::move(options));
}
} // namespace NDnsResolver
} // namespace NActors
|
