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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "rpc_target.h"
#include "shared_rpc_resources.h"
#include <vespa/fnet/frt/supervisor.h>
#include <vespa/fnet/frt/target.h>
#include <vespa/fnet/transport.h>
#include <vespa/slobrok/sbregister.h>
#include <vespa/slobrok/sbmirror.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/util/host_name.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <cassert>
#include <chrono>
#include <thread>
#include <vespa/log/log.h>
LOG_SETUP(".storage.shared_rpc_resources");
using namespace std::chrono_literals;
using vespalib::make_string_short::fmt;
using vespalib::IllegalStateException;
namespace storage::rpc {
namespace {
class RpcTargetImpl : public RpcTarget {
private:
FRT_Target* _target;
vespalib::string _spec;
public:
RpcTargetImpl(FRT_Target* target, const vespalib::string& spec)
: _target(target),
_spec(spec)
{}
~RpcTargetImpl() override {
_target->internal_subref();
}
FRT_Target* get() noexcept override { return _target; }
bool is_valid() const noexcept override { return _target->IsValid(); }
const vespalib::string& spec() const noexcept override { return _spec; }
};
}
class SharedRpcResources::RpcTargetFactoryImpl : public RpcTargetFactory {
private:
FRT_Supervisor& _orb;
public:
RpcTargetFactoryImpl(FRT_Supervisor& orb)
: _orb(orb)
{}
std::unique_ptr<RpcTarget> make_target(const vespalib::string& connection_spec) const override {
auto* raw_target = _orb.GetTarget(connection_spec.c_str());
if (raw_target) {
return std::make_unique<RpcTargetImpl>(raw_target, connection_spec);
}
return std::unique_ptr<RpcTarget>();
}
};
SharedRpcResources::SharedRpcResources(const config::ConfigUri& config_uri,
int rpc_server_port,
size_t rpc_thread_pool_size,
size_t rpc_events_before_wakeup)
: _transport(std::make_unique<FNET_Transport>(fnet::TransportConfig(rpc_thread_pool_size).
events_before_wakeup(rpc_events_before_wakeup))),
_orb(std::make_unique<FRT_Supervisor>(_transport.get())),
_slobrok_register(std::make_unique<slobrok::api::RegisterAPI>(*_orb, slobrok::ConfiguratorFactory(config_uri))),
_slobrok_mirror(std::make_unique<slobrok::api::MirrorAPI>(*_orb, slobrok::ConfiguratorFactory(config_uri))),
_target_factory(std::make_unique<RpcTargetFactoryImpl>(*_orb)),
_hostname(vespalib::HostName::get()),
_rpc_server_port(rpc_server_port),
_shutdown(false)
{ }
// TODO make sure init/shutdown is safe for aborted init in comm. mgr.
SharedRpcResources::~SharedRpcResources() {
if (!_shutdown) {
shutdown();
}
}
void SharedRpcResources::start_server_and_register_slobrok(vespalib::stringref my_handle) {
LOG(debug, "Starting main RPC supervisor on port %d with slobrok handle '%s'",
_rpc_server_port, vespalib::string(my_handle).c_str());
if (!_orb->Listen(_rpc_server_port)) {
throw IllegalStateException(fmt("Failed to listen to RPC port %d", _rpc_server_port), VESPA_STRLOC);
}
_transport->Start();
_slobrok_register->registerName(my_handle);
wait_until_slobrok_is_ready();
_handle = my_handle;
}
void SharedRpcResources::wait_until_slobrok_is_ready() {
// TODO look more closely at how mbus does its slobrok business
while (_slobrok_register->busy() || !_slobrok_mirror->ready()) {
// TODO some form of timeout mechanism here, and warning logging to identify SB issues
LOG(debug, "Waiting for Slobrok to become ready");
std::this_thread::sleep_for(10ms);
}
}
void SharedRpcResources::shutdown() {
assert(!_shutdown);
if (listen_port() > 0) {
_slobrok_register->unregisterName(_handle);
// Give slobrok some time to dispatch unregister RPC
std::this_thread::sleep_for(10ms);
}
_transport->ShutDown(true);
// FIXME need to reset to break weak_ptrs? But ShutDown should already sync pending resolves...!
_shutdown = true;
}
int SharedRpcResources::listen_port() const noexcept {
return _orb->GetListenPort();
}
const RpcTargetFactory& SharedRpcResources::target_factory() const {
return *_target_factory;
}
}
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