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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2015 Cloudius Systems, Ltd.
*/
#include <seastar/core/app-template.hh>
#include <seastar/core/distributed.hh>
#include <seastar/core/future-util.hh>
#include <seastar/core/sleep.hh>
#include <seastar/core/thread.hh>
using namespace seastar;
struct async_service : public seastar::async_sharded_service<async_service> {
thread_local static bool deleted;
~async_service() {
deleted = true;
}
void run() {
auto ref = shared_from_this();
sleep(std::chrono::milliseconds(100 + 100 * engine().cpu_id())).then([this, ref] {
check();
});
}
virtual void check() {
assert(!deleted);
}
future<> stop() { return make_ready_future<>(); }
};
thread_local bool async_service::deleted = false;
struct X {
sstring echo(sstring arg) {
return arg;
}
int cpu_id_squared() const {
auto id = engine().cpu_id();
return id * id;
}
future<> stop() { return make_ready_future<>(); }
};
template <typename T, typename Func>
future<> do_with_distributed(Func&& func) {
auto x = make_shared<distributed<T>>();
return func(*x).finally([x] {
return x->stop();
}).finally([x]{});
}
future<> test_that_each_core_gets_the_arguments() {
return do_with_distributed<X>([] (auto& x) {
return x.start().then([&x] {
return x.map_reduce([] (sstring msg){
if (msg != "hello") {
throw std::runtime_error("wrong message");
}
}, &X::echo, sstring("hello"));
});
});
}
future<> test_functor_version() {
return do_with_distributed<X>([] (auto& x) {
return x.start().then([&x] {
return x.map_reduce([] (sstring msg){
if (msg != "hello") {
throw std::runtime_error("wrong message");
}
}, [] (X& x) { return x.echo("hello"); });
});
});
}
struct Y {
sstring s;
Y(sstring s) : s(std::move(s)) {}
future<> stop() { return make_ready_future<>(); }
};
future<> test_constructor_argument_is_passed_to_each_core() {
return do_with_distributed<Y>([] (auto& y) {
return y.start(sstring("hello")).then([&y] {
return y.invoke_on_all([] (Y& y) {
if (y.s != "hello") {
throw std::runtime_error(format("expected message mismatch, is \"%s\"", y.s));
}
});
});
});
}
future<> test_map_reduce() {
return do_with_distributed<X>([] (distributed<X>& x) {
return x.start().then([&x] {
return x.map_reduce0(std::mem_fn(&X::cpu_id_squared),
0,
std::plus<int>()).then([] (int result) {
int n = smp::count - 1;
if (result != (n * (n + 1) * (2*n + 1)) / 6) {
throw std::runtime_error("map_reduce failed");
}
});
});
});
}
future<> test_async() {
return do_with_distributed<async_service>([] (distributed<async_service>& x) {
return x.start().then([&x] {
return x.invoke_on_all(&async_service::run);
});
}).then([] {
return sleep(std::chrono::milliseconds(100 * (smp::count + 1)));
});
}
future<> test_invoke_on_others() {
return seastar::async([] {
struct my_service {
int counter = 0;
void up() { ++counter; }
future<> stop() { return make_ready_future<>(); }
};
for (unsigned c = 0; c < smp::count; ++c) {
smp::submit_to(c, [c] {
return seastar::async([c] {
sharded<my_service> s;
s.start().get();
s.invoke_on_others([](auto& s) { s.up(); }).get();
if (s.local().counter != 0) {
throw std::runtime_error("local modified");
}
s.invoke_on_all([c](auto& remote) {
if (engine().cpu_id() != c) {
if (remote.counter != 1) {
throw std::runtime_error("remote not modified");
}
}
}).get();
s.stop().get();
});
}).get();
}
});
}
int main(int argc, char** argv) {
app_template app;
return app.run(argc, argv, [] {
return test_that_each_core_gets_the_arguments().then([] {
return test_functor_version();
}).then([] {
return test_constructor_argument_is_passed_to_each_core();
}).then([] {
return test_map_reduce();
}).then([] {
return test_async();
}).then([] {
return test_invoke_on_others();
});
});
}
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