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248 lines (223 loc) · 10.3 KB
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/******************************************************************************\
* ___ __ *
* /\_ \ __/\ \ *
* \//\ \ /\_\ \ \____ ___ _____ _____ __ *
* \ \ \ \/\ \ \ '__`\ /'___\/\ '__`\/\ '__`\ /'__`\ *
* \_\ \_\ \ \ \ \L\ \/\ \__/\ \ \L\ \ \ \L\ \/\ \L\.\_ *
* /\____\\ \_\ \_,__/\ \____\\ \ ,__/\ \ ,__/\ \__/.\_\ *
* \/____/ \/_/\/___/ \/____/ \ \ \/ \ \ \/ \/__/\/_/ *
* \ \_\ \ \_\ *
* \/_/ \/_/ *
* *
* Copyright (C) 2011-2013 *
* Dominik Charousset <dominik.charousset@haw-hamburg.de> *
* *
* This file is part of libcppa. *
* libcppa is free software: you can redistribute it and/or modify it under *
* the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation, either version 3 of the License *
* or (at your option) any later version. *
* *
* libcppa is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* See the GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with libcppa. If not, see <http://www.gnu.org/licenses/>. *
\******************************************************************************/
#include <future>
#include <cstdint>
#include <iostream>
#include "cppa/logging.hpp"
#include "cppa/to_string.hpp"
#include "cppa/network/middleman.hpp"
#include "cppa/network/default_peer.hpp"
#include "cppa/network/ipv4_acceptor.hpp"
#include "cppa/network/ipv4_io_stream.hpp"
#include "cppa/network/default_protocol.hpp"
#include "cppa/network/default_peer_acceptor.hpp"
#include "cppa/detail/actor_registry.hpp"
#include "cppa/detail/singleton_manager.hpp"
#include "cppa/intrusive/blocking_single_reader_queue.hpp"
using namespace std;
using namespace cppa::detail;
namespace cppa { namespace network {
default_protocol::default_protocol(abstract_middleman* parent)
: super(parent), m_addressing(this) { }
atom_value default_protocol::identifier() const {
return atom("DEFAULT");
}
void default_protocol::publish(const actor_ptr& whom, variant_args args) {
CPPA_LOG_TRACE(CPPA_TARG(whom, to_string)
<< ", args.size() = " << args.size());
if (!whom) return;
CPPA_REQUIRE(args.size() == 2 || args.size() == 1);
auto i = args.begin();
if (args.size() == 1) {
auto port = get<uint16_t>(*i);
CPPA_LOG_INFO("publish " << to_string(whom) << " on port " << port);
publish(whom, ipv4_acceptor::create(port), {});
}
else if (args.size() == 2) {
auto port = get<uint16_t>(*i++);
auto& addr = get<string>(*i);
CPPA_LOG_INFO("publish " << to_string(whom) << " on port " << port
<< " with addr = " << addr);
publish(whom, ipv4_acceptor::create(port, addr.c_str()), {});
}
else throw logic_error("wrong number of arguments, expected one or two");
}
void default_protocol::publish(const actor_ptr& whom,
std::unique_ptr<acceptor> ptr,
variant_args args ) {
CPPA_LOG_TRACE(CPPA_TARG(whom, to_string) << ", " << CPPA_MARG(ptr, get)
<< ", args.size() = " << args.size());
if (!whom) return;
CPPA_REQUIRE(args.size() == 0);
static_cast<void>(args); // keep compiler happy
singleton_manager::get_actor_registry()->put(whom->id(), whom);
default_protocol_ptr proto = this;
auto impl = make_counted<default_peer_acceptor>(this, move(ptr), whom);
run_later([=] {
CPPA_LOGF_TRACE("lambda from default_protocol::publish");
proto->m_acceptors[whom].push_back(impl);
proto->continue_reader(impl.get());
});
}
void default_protocol::unpublish(const actor_ptr& whom) {
CPPA_LOG_TRACE("whom = " << to_string(whom));
default_protocol_ptr proto = this;
run_later([=] {
CPPA_LOGF_TRACE("lambda from default_protocol::unpublish");
auto& acceptors = m_acceptors[whom];
for (auto& ptr : acceptors) {
proto->stop_reader(ptr.get());
}
m_acceptors.erase(whom);
});
}
void default_protocol::register_peer(const process_information& node,
default_peer* ptr) {
CPPA_LOG_TRACE("node = " << to_string(node) << ", ptr = " << ptr);
auto& entry = m_peers[node];
if (entry.impl == nullptr) {
if (entry.queue == nullptr) entry.queue.emplace();
ptr->set_queue(entry.queue);
entry.impl.reset(ptr);
if (!entry.queue->empty()) {
auto tmp = entry.queue->pop();
ptr->enqueue(tmp.first, tmp.second);
}
}
else { CPPA_LOG_ERROR("peer " << to_string(node) << " already defined"); }
}
default_peer_ptr default_protocol::get_peer(const process_information& n) {
CPPA_LOG_TRACE("n = " << to_string(n));
auto i = m_peers.find(n);
if (i != m_peers.end()) {
CPPA_LOG_DEBUG("result = " << i->second.impl.get());
return i->second.impl;
}
CPPA_LOG_DEBUG("result = nullptr");
return nullptr;
}
void default_protocol::enqueue(const process_information& node,
const message_header& hdr,
any_tuple msg) {
auto& entry = m_peers[node];
if (entry.impl) {
CPPA_REQUIRE(entry.queue != nullptr);
if (!entry.impl->has_unwritten_data()) {
CPPA_REQUIRE(entry.queue->empty());
entry.impl->enqueue(hdr, msg);
return;
}
}
if (entry.queue == nullptr) entry.queue.emplace();
entry.queue->emplace(hdr, msg);
}
actor_ptr default_protocol::remote_actor(variant_args args) {
CPPA_LOG_TRACE("args.size() = " << args.size());
CPPA_REQUIRE(args.size() == 2);
auto i = args.begin();
auto port = get<uint16_t>(*i++);
auto& host = get<string>(*i);
auto io = ipv4_io_stream::connect_to(host.c_str(), port);
return remote_actor(io_stream_ptr_pair(io, io), {});
}
struct remote_actor_result { remote_actor_result* next; actor_ptr value; };
actor_ptr default_protocol::remote_actor(io_stream_ptr_pair io,
variant_args args ) {
CPPA_LOG_TRACE("io = {" << io.first.get() << ", " << io.second.get() << "}, "
<< "args.size() = " << args.size());
CPPA_REQUIRE(args.size() == 0);
static_cast<void>(args); // keep compiler happy when compiling w/o debug
auto pinf = process_information::get();
std::uint32_t process_id = pinf->process_id();
// throws on error
io.second->write(&process_id, sizeof(std::uint32_t));
io.second->write(pinf->node_id().data(), pinf->node_id().size());
actor_id remote_aid;
std::uint32_t peer_pid;
process_information::node_id_type peer_node_id;
io.first->read(&remote_aid, sizeof(actor_id));
io.first->read(&peer_pid, sizeof(std::uint32_t));
io.first->read(peer_node_id.data(), peer_node_id.size());
auto pinfptr = make_counted<process_information>(peer_pid, peer_node_id);
if (*pinf == *pinfptr) {
// dude, this is not a remote actor, it's a local actor!
CPPA_LOG_ERROR("remote_actor() called to access a local actor");
# ifndef CPPA_DEBUG
std::cerr << "*** warning: remote_actor() called to access a local actor\n"
<< std::flush;
# endif
return singleton_manager::get_actor_registry()->get(remote_aid);
}
default_protocol_ptr proto = this;
intrusive::blocking_single_reader_queue<remote_actor_result> q;
run_later([proto, io, pinfptr, remote_aid, &q] {
CPPA_LOGF_TRACE("lambda from default_protocol::remote_actor");
auto pp = proto->get_peer(*pinfptr);
CPPA_LOGF_INFO_IF(pp, "connection already exists (re-use old one)");
if (!pp) proto->new_peer(io.first, io.second, pinfptr);
auto res = proto->addressing()->get_or_put(*pinfptr, remote_aid);
q.push_back(new remote_actor_result{0, res});
});
unique_ptr<remote_actor_result> result(q.pop());
CPPA_LOGF_DEBUG("result = " << result->value.get());
return result->value;
}
void default_protocol::last_proxy_exited(const default_peer_ptr& pptr) {
CPPA_REQUIRE(pptr != nullptr);
CPPA_LOG_TRACE("pptr = " << pptr.get()
<< ", pptr->node() = " << to_string(pptr->node()));
if (pptr->erase_on_last_proxy_exited() && pptr->queue().empty()) {
stop_reader(pptr.get());
auto i = m_peers.find(pptr->node());
if (i != m_peers.end()) {
CPPA_LOG_DEBUG_IF(i->second.impl != pptr,
"node " << to_string(pptr->node())
<< " does not exist in m_peers");
if (i->second.impl == pptr) {
m_peers.erase(i);
}
}
}
}
void default_protocol::new_peer(const input_stream_ptr& in,
const output_stream_ptr& out,
const process_information_ptr& node) {
CPPA_LOG_TRACE("");
auto ptr = make_counted<default_peer>(this, in, out, node);
continue_reader(ptr.get());
if (node) register_peer(*node, ptr.get());
}
void default_protocol::continue_writer(const default_peer_ptr& pptr) {
CPPA_LOG_TRACE(CPPA_MARG(pptr, get));
super::continue_writer(pptr.get());
}
default_actor_addressing* default_protocol::addressing() {
return &m_addressing;
}
} } // namespace cppa::network
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