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#include "PipeliningTest.h"
#include <trantor/net/EventLoop.h>
#include <atomic>
#include <mutex>
void PipeliningTest::normalPipe(
const HttpRequestPtr &req,
std::function<void(const HttpResponsePtr &)> &&callback) const
{
static std::atomic<int> counter{0};
int c = counter.fetch_add(1);
if (c % 3 == 1)
{
auto resp = HttpResponse::newHttpResponse();
auto str = utils::formattedString("<P>the %dth response</P>", c);
resp->addHeader("counter", utils::formattedString("%d", c));
resp->setBody(std::move(str));
callback(resp);
return;
}
double delay = ((double)(10 - (c % 10))) / 10.0;
if (c % 3 == 2)
{
// call the callback in another thread.
drogon::app().getLoop()->runAfter(delay, [c, callback]() {
auto resp = HttpResponse::newHttpResponse();
auto str = utils::formattedString("<P>the %dth response</P>", c);
resp->addHeader("counter", utils::formattedString("%d", c));
resp->setBody(std::move(str));
callback(resp);
});
return;
}
trantor::EventLoop::getEventLoopOfCurrentThread()->runAfter(
delay, [c, callback]() {
auto resp = HttpResponse::newHttpResponse();
auto str = utils::formattedString("<P>the %dth response</P>", c);
resp->addHeader("counter", utils::formattedString("%d", c));
resp->setBody(std::move(str));
callback(resp);
});
}
// Receive 1, cache 1
// Receive 2, send 1 send 2
void PipeliningTest::strangePipe1(
const HttpRequestPtr &req,
std::function<void(const HttpResponsePtr &)> &&callback)
{
static std::mutex mtx;
static std::vector<
std::pair<std::function<void(const HttpResponsePtr &)>, std::string>>
callbacks;
LOG_INFO << "Receive request " << req->body();
std::function<void(const HttpResponsePtr &)> cb1;
std::string body1;
std::function<void(const HttpResponsePtr &)> cb2;
std::string body2;
{
std::lock_guard<std::mutex> lock(mtx);
if (callbacks.empty())
{
callbacks.emplace_back(std::move(callback), req->getBody());
return;
}
auto item = std::move(callbacks.back());
callbacks.pop_back();
cb1 = std::move(item.first);
body1 = std::move(item.second);
cb2 = std::move(callback);
body2 = std::string{req->body()};
}
if (cb1)
{
auto resp = HttpResponse::newHttpResponse();
resp->setBody(body1);
cb1(resp);
}
if (cb2)
{
auto resp = HttpResponse::newHttpResponse();
resp->setBody(body2);
cb2(resp);
}
}
// Receive 1, cache 1
// Receive 2, send 1 cache 2
// Receive 3, send 2 send 3
void PipeliningTest::strangePipe2(
const HttpRequestPtr &req,
std::function<void(const HttpResponsePtr &)> &&callback)
{
static std::mutex mtx;
static std::vector<
std::pair<std::function<void(const HttpResponsePtr &)>, std::string>>
callbacks;
static uint64_t idx{0};
LOG_INFO << "Receive request " << req->body();
std::function<void(const HttpResponsePtr &)> cb1;
std::string body1;
std::function<void(const HttpResponsePtr &)> cb2;
std::string body2;
{
std::lock_guard<std::mutex> lock(mtx);
++idx;
if (idx % 3 == 1)
{
assert(callbacks.empty());
callbacks.emplace_back(std::move(callback), req->getBody());
return;
}
assert(callbacks.size() == 1);
if (idx % 3 == 2)
{
auto item = std::move(callbacks.back());
cb1 = std::move(item.first);
body1 = std::move(item.second);
callbacks.pop_back();
callbacks.emplace_back(std::move(callback), req->getBody());
}
else
{
auto item = std::move(callbacks.back());
cb1 = std::move(item.first);
body1 = std::move(item.second);
callbacks.pop_back();
cb2 = std::move(callback);
body2 = std::string{req->body()};
}
}
if (cb1)
{
auto resp = HttpResponse::newHttpResponse();
resp->setBody(body1);
cb1(resp);
}
if (cb2)
{
auto resp = HttpResponse::newHttpResponse();
resp->setBody(body2);
cb2(resp);
}
}
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