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// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.
#define CAF_SUITE actor_pool
#include "caf/actor_pool.hpp"
#include "core-test.hpp"
#include "caf/all.hpp"
using namespace caf;
namespace {
std::atomic<size_t> s_ctors;
std::atomic<size_t> s_dtors;
class worker : public event_based_actor {
public:
worker(actor_config& cfg) : event_based_actor(cfg) {
++s_ctors;
}
~worker() override {
++s_dtors;
}
behavior make_behavior() override {
auto nested = exit_handler_;
set_exit_handler(
[=](scheduled_actor* self, exit_msg& em) { nested(self, em); });
return {
[](int32_t x, int32_t y) { return x + y; },
};
}
};
struct fixture {
// allows us to check s_dtors after dtor of actor_system
actor_system_config cfg;
union {
actor_system system;
};
union {
scoped_execution_unit context;
};
std::function<actor()> spawn_worker;
fixture() {
new (&system) actor_system(cfg);
new (&context) scoped_execution_unit(&system);
spawn_worker = [&] { return system.spawn<worker>(); };
}
~fixture() {
system.await_all_actors_done();
context.~scoped_execution_unit();
system.~actor_system();
CHECK_EQ(s_dtors.load(), s_ctors.load());
}
};
#define HANDLE_ERROR \
[](const error& err) { \
CAF_FAIL("AUT responded with an error: " + to_string(err)); \
}
} // namespace
BEGIN_FIXTURE_SCOPE(fixture)
CAF_TEST(round_robin_actor_pool) {
scoped_actor self{system};
auto pool = actor_pool::make(&context, 5, spawn_worker,
actor_pool::round_robin());
self->send(pool, sys_atom_v, put_atom_v, spawn_worker());
std::vector<actor> workers;
for (int32_t i = 0; i < 6; ++i) {
self->request(pool, infinite, i, i)
.receive(
[&](int32_t res) {
CHECK_EQ(res, i + i);
auto sender = actor_cast<strong_actor_ptr>(self->current_sender());
CAF_REQUIRE(sender);
workers.push_back(actor_cast<actor>(std::move(sender)));
},
HANDLE_ERROR);
}
CHECK_EQ(workers.size(), 6u);
CHECK(std::unique(workers.begin(), workers.end()) == workers.end());
self->request(pool, infinite, sys_atom_v, get_atom_v)
.receive(
[&](std::vector<actor>& ws) {
std::sort(workers.begin(), workers.end());
std::sort(ws.begin(), ws.end());
CAF_REQUIRE_EQUAL(workers.size(), ws.size());
CHECK(std::equal(workers.begin(), workers.end(), ws.begin()));
},
HANDLE_ERROR);
MESSAGE("await last worker");
anon_send_exit(workers.back(), exit_reason::user_shutdown);
self->wait_for(workers.back());
MESSAGE("last worker shut down");
workers.pop_back();
// poll actor pool up to 10 times or until it removes the failed worker
bool success = false;
size_t i = 0;
while (!success && ++i <= 10) {
self->request(pool, infinite, sys_atom_v, get_atom_v)
.receive(
[&](std::vector<actor>& ws) {
success = workers.size() == ws.size();
if (success) {
std::sort(ws.begin(), ws.end());
CHECK_EQ(workers, ws);
} else {
// wait a bit until polling again
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
},
HANDLE_ERROR);
}
CAF_REQUIRE_EQUAL(success, true);
MESSAGE("about to send exit to workers");
self->send_exit(pool, exit_reason::user_shutdown);
self->wait_for(workers);
}
CAF_TEST(broadcast_actor_pool) {
scoped_actor self{system};
auto spawn5 = [&] {
return actor_pool::make(&context, 5, fixture::spawn_worker,
actor_pool::broadcast());
};
CHECK_EQ(system.registry().running(), 1u);
auto pool = actor_pool::make(&context, 5, spawn5, actor_pool::broadcast());
CHECK_EQ(system.registry().running(), 32u);
self->send(pool, 1, 2);
std::vector<int> results;
int i = 0;
self->receive_for(i, 25)([&](int res) { results.push_back(res); },
after(std::chrono::milliseconds(250)) >>
[] { CAF_ERROR("didn't receive a result"); });
CHECK_EQ(results.size(), 25u);
CHECK(std::all_of(results.begin(), results.end(),
[](int res) { return res == 3; }));
self->send_exit(pool, exit_reason::user_shutdown);
}
CAF_TEST(random_actor_pool) {
scoped_actor self{system};
auto pool = actor_pool::make(&context, 5, spawn_worker, actor_pool::random());
for (int i = 0; i < 5; ++i) {
self->request(pool, std::chrono::milliseconds(250), 1, 2)
.receive([&](int res) { CHECK_EQ(res, 3); }, HANDLE_ERROR);
}
self->send_exit(pool, exit_reason::user_shutdown);
}
END_FIXTURE_SCOPE()
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