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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/fnet/frt/frt.h>
#include <vespa/fastos/app.h>
//-----------------------------------------------------------------------------
struct Session
{
FNET_Connection *client;
FRT_Target *server;
uint32_t id;
uint32_t finiCnt;
Session(uint32_t xid) : client(nullptr), server(nullptr), id(xid), finiCnt(0) {}
~Session() { assert(client == nullptr && server == nullptr && finiCnt == 2); }
private:
Session(const Session &);
Session &operator=(const Session &);
};
//-----------------------------------------------------------------------------
class RPCProxy : public FRT_Invokable
{
private:
FRT_Supervisor &_supervisor;
const char *_spec;
bool _verbose;
uint32_t _currID;
char _prefixStr[256];
RPCProxy(const RPCProxy &);
RPCProxy &operator=(const RPCProxy &);
public:
RPCProxy(FRT_Supervisor &supervisor,
const char *spec,
bool verbose)
: _supervisor(supervisor),
_spec(spec),
_verbose(verbose),
_currID(0),
_prefixStr() {}
bool IsVerbose() const { return _verbose; }
const char *GetPrefix(FRT_RPCRequest *req);
void PrintMethod(FRT_RPCRequest *req, const char *desc);
void Done(FRT_RPCRequest *req);
void HOOK_Mismatch(FRT_RPCRequest *req);
void HOOK_Init(FRT_RPCRequest *req);
void HOOK_Down(FRT_RPCRequest *req);
void HOOK_Fini(FRT_RPCRequest *req);
static Session *GetSession(FRT_RPCRequest *req)
{
return (Session *) req->GetConnection()->GetContext()._value.VOIDP;
}
};
//-----------------------------------------------------------------------------
class ReqDone : public FRT_IRequestWait
{
private:
RPCProxy &_proxy;
public:
ReqDone(RPCProxy &proxy) : _proxy(proxy) {}
void RequestDone(FRT_RPCRequest *req) override;
};
void
ReqDone::RequestDone(FRT_RPCRequest *req)
{
_proxy.Done(req);
}
//-----------------------------------------------------------------------------
const char *
RPCProxy::GetPrefix(FRT_RPCRequest *req)
{
FastOS_Time t;
tm currTime;
tm *currTimePt;
t.SetNow();
time_t secs = t.Secs();
currTimePt = localtime_r(&secs, &currTime);
assert(currTimePt == &currTime);
(void) currTimePt;
char rid[32];
if (req->GetContext()._value.CHANNEL != nullptr) {
sprintf(rid, "[rid=%u]", req->GetContext()._value.CHANNEL->GetID());
} else {
rid[0] = '\0';
}
sprintf(_prefixStr, "[%04d-%02d-%02d %02d:%02d:%02d:%03d][sid=%u]%s",
currTime.tm_year + 1900,
currTime.tm_mon + 1,
currTime.tm_mday,
currTime.tm_hour,
currTime.tm_min,
currTime.tm_sec,
(int)(t.GetMicroSeconds() / 1000),
GetSession(req)->id,
rid);
return _prefixStr;
}
void
RPCProxy::PrintMethod(FRT_RPCRequest *req, const char *desc)
{
fprintf(stdout, "%s %s: %s\n", GetPrefix(req), desc,
req->GetMethodName());
}
void
RPCProxy::Done(FRT_RPCRequest *req)
{
PrintMethod(req, "RETURN");
if (IsVerbose()) {
req->GetReturn()->Print(8);
}
req->Return();
}
void
RPCProxy::HOOK_Mismatch(FRT_RPCRequest *req)
{
PrintMethod(req, "INVOKE");
if (IsVerbose()) {
req->GetParams()->Print(8);
}
req->Detach();
req->SetError(FRTE_NO_ERROR, "");
if (req->GetConnection()->IsServer() && GetSession(req)->server != nullptr)
{
GetSession(req)->server->InvokeAsync(req, 60.0, &req->getStash().create<ReqDone>(*this));
} else if (req->GetConnection()->IsClient() && GetSession(req)->client != nullptr)
{
FRT_Supervisor::InvokeAsync(GetSession(req)->client->Owner(), GetSession(req)->client,
req, 60.0, &req->getStash().create<ReqDone>(*this));
} else {
req->SetError(FRTE_RPC_CONNECTION);
req->Return();
}
}
void
RPCProxy::HOOK_Init(FRT_RPCRequest *req)
{
if (req->GetConnection()->IsClient()) {
return;
}
Session *session = new Session(_currID++);
session->client = req->GetConnection();
session->server =
_supervisor.Get2WayTarget(_spec,
FNET_Context((void *) session));
session->client->SetContext(FNET_Context((void *) session));
if (session->server->GetConnection() == nullptr ||
session->server->GetConnection()->GetState()
> FNET_Connection::FNET_CONNECTED)
{
session->finiCnt = 1;
session->client->Owner()->Close(session->client);
}
fprintf(stdout, "%s INIT\n", GetPrefix(req));
}
void
RPCProxy::HOOK_Down(FRT_RPCRequest *req)
{
Session *session = GetSession(req);
if (req->GetConnection()->IsClient()) {
if (session->client != nullptr) {
session->client->Owner()->Close(session->client);
}
} else {
session->server->SubRef();
session->client = nullptr;
session->server = nullptr;
}
}
void
RPCProxy::HOOK_Fini(FRT_RPCRequest *req)
{
if (++GetSession(req)->finiCnt == 2) {
fprintf(stdout, "%s FINI\n", GetPrefix(req));
delete GetSession(req);
}
}
//-----------------------------------------------------------------------------
class App : public FastOS_Application
{
public:
int Main() override;
};
int
App::Main()
{
FNET_SignalShutDown::hookSignals();
// would like to turn off FNET logging somehow
if (_argc < 3) {
fprintf(stderr, "usage: %s <listenspec> <connectspec> [verbose]\n", _argv[0]);
return 1;
}
bool verbose = (_argc > 3) && (strcmp(_argv[3], "verbose") == 0);
FRT_Supervisor supervisor;
RPCProxy proxy(supervisor, _argv[2], verbose);
supervisor.GetReflectionManager()->Reset();
supervisor.SetSessionInitHook(FRT_METHOD(RPCProxy::HOOK_Init), &proxy);
supervisor.SetSessionDownHook(FRT_METHOD(RPCProxy::HOOK_Down), &proxy);
supervisor.SetSessionFiniHook(FRT_METHOD(RPCProxy::HOOK_Fini), &proxy);
supervisor.SetMethodMismatchHook(FRT_METHOD(RPCProxy::HOOK_Mismatch),
&proxy);
supervisor.Listen(_argv[1]);
FNET_SignalShutDown ssd(*supervisor.GetTransport());
supervisor.Main();
return 0;
}
int
main(int argc, char **argv)
{
App app;
return app.Entry(argc, argv);
}
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