error_code service_node::start()
{
error_code err = ERR_OK;
// init data dir
if (!dsn::utils::filesystem::path_exists(spec().data_dir))
dsn::utils::filesystem::create_directory(spec().data_dir);
// init task engine
_computation = new task_engine(this);
_computation->create(_app_spec.pools);
dassert (!_computation->is_started(),
"task engine must not be started at this point");
// init per node io engines
err = init_io_engine(_per_node_io, IOE_PER_NODE);
if (err != ERR_OK) return err;
_ios.push_back(_per_node_io);
// init per queue io engines
for (auto& pl : _computation->pools())
{
if (pl == nullptr)
continue;
for (auto& q : pl->queues())
{
io_engine io;
io.q = q;
io.pool = pl;
err = init_io_engine(io, IOE_PER_QUEUE);
if (err != ERR_OK) return err;
_per_queue_ios[q] = io;
_ios.push_back(io);
}
}
// start io engines (only computation and timer), others are started in app start task
for (auto& io : _ios)
{
start_io_engine_in_main(io);
}
// start task engine
_computation->start();
dassert(_computation->is_started(),
"task engine must be started at this point");
// create app
{
::dsn::tools::node_scoper scoper(this);
_app_context_ptr = _app_spec.role.create(_app_spec.role.type_name.c_str());
}
return err;
}
error_code service_node::start()
{
error_code err = ERR_OK;
// init task engine
_computation = new task_engine(this);
_computation->create(_app_spec.pools);
dassert (!_computation->is_started(),
"task engine must not be started at this point");
// init per node io engines
err = init_io_engine(_per_node_io, IOE_PER_NODE);
if (err != ERR_OK) return err;
_ios.push_back(_per_node_io);
// init per queue io engines
for (auto& pl : _computation->pools())
{
if (pl == nullptr)
continue;
for (auto& q : pl->queues())
{
io_engine io;
io.q = q;
io.pool = pl;
err = init_io_engine(io, IOE_PER_QUEUE);
if (err != ERR_OK) return err;
_per_queue_ios[q] = io;
_ios.push_back(io);
}
}
// start io engines (only computation and timer), others are started in app start task
for (auto& io : _ios)
{
start_io_engine_in_main(io);
}
// start task engine
_computation->start();
dassert(_computation->is_started(),
"task engine must be started at this point");
return err;
}
