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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "cmd.h"
#include "rpc_server_map.h"
#include "reserved_name.h"
#include "remote_slobrok.h"
#include "sbenv.h"
#include <vespa/log/log.h>
LOG_SETUP(".cmd");
namespace slobrok {
//-----------------------------------------------------------------------------
struct RegRpcSrvData
{
private:
RegRpcSrvData(const RegRpcSrvData &);
RegRpcSrvData &operator=(const RegRpcSrvData &);
public:
enum {
RDC_INIT, XCH_WANTADD, CHK_RPCSRV, XCH_DOADD, XCH_IGNORE, RDC_INVAL
} _state;
SBEnv &env;
const std::string name;
const std::string spec;
FRT_RPCRequest * const registerRequest;
RegRpcSrvData(SBEnv &e, const std::string &n, const std::string &s, FRT_RPCRequest *r)
: _state(RDC_INIT), env(e), name(n), spec(s), registerRequest(r)
{}
};
RegRpcSrvCommand::RegRpcSrvCommand(std::unique_ptr<RegRpcSrvData> data)
: _data(std::move(data))
{}
RegRpcSrvCommand::RegRpcSrvCommand(RegRpcSrvCommand &&) = default;
RegRpcSrvCommand & RegRpcSrvCommand::operator =(RegRpcSrvCommand &&) = default;
RegRpcSrvCommand::~RegRpcSrvCommand() = default;
RegRpcSrvCommand
RegRpcSrvCommand::makeRegRpcSrvCmd(SBEnv &env,
const std::string &name, const std::string &spec,
FRT_RPCRequest *req)
{
return RegRpcSrvCommand(std::make_unique<RegRpcSrvData>(env, name, spec, req));
}
RegRpcSrvCommand
RegRpcSrvCommand::makeRemRemCmd(SBEnv &env, const std::string & name, const std::string &spec)
{
auto data = std::make_unique<RegRpcSrvData>(env, name, spec, nullptr);
data->_state = RegRpcSrvData::XCH_IGNORE;
return RegRpcSrvCommand(std::move(data));
}
void
RegRpcSrvCommand::doRequest()
{
LOG_ASSERT(_data->_state == RegRpcSrvData::RDC_INIT);
doneHandler(OkState());
}
void
RegRpcSrvCommand::cleanupReservation()
{
RpcServerMap &map = _data->env._rpcsrvmap;
const ReservedName *rsvp = map.getReservation(_data->name.c_str());
if (rsvp != nullptr && rsvp->isLocal) {
map.removeReservation(_data->name.c_str());
}
}
void
RegRpcSrvCommand::doneHandler(OkState result)
{
LOG_ASSERT(_data != nullptr);
if (result.failed()) {
LOG(warning, "failed in state %d: %s",
_data->_state, result.errorMsg.c_str());
cleanupReservation();
// XXX should handle different state errors differently?
if (_data->registerRequest != nullptr) {
_data->registerRequest->SetError(FRTE_RPC_METHOD_FAILED,
result.errorMsg.c_str());
_data->registerRequest->Return();
} else {
LOG(warning, "ignored: %s", result.errorMsg.c_str());
}
goto alldone;
}
if (_data->_state == RegRpcSrvData::RDC_INIT) {
LOG(spam, "phase wantAdd(%s,%s)",
_data->name.c_str(), _data->spec.c_str());
_data->_state = RegRpcSrvData::XCH_WANTADD;
_data->env._exchanger.wantAdd(_data->name.c_str(), _data->spec.c_str(), std::move(*this));
return;
} else if (_data->_state == RegRpcSrvData::XCH_WANTADD) {
LOG(spam, "phase addManaged(%s,%s)",
_data->name.c_str(), _data->spec.c_str());
_data->_state = RegRpcSrvData::CHK_RPCSRV;
_data->env._rpcsrvmanager.addManaged(_data->name, _data->spec.c_str(), std::move(*this));
return;
} else if (_data->_state == RegRpcSrvData::CHK_RPCSRV) {
LOG(spam, "phase doAdd(%s,%s)", _data->name.c_str(), _data->spec.c_str());
_data->_state = RegRpcSrvData::XCH_DOADD;
_data->env._exchanger.doAdd(_data->name.c_str(), _data->spec.c_str(), std::move(*this));
return;
} else if (_data->_state == RegRpcSrvData::XCH_DOADD) {
LOG(debug, "done doAdd(%s,%s)", _data->name.c_str(), _data->spec.c_str());
_data->_state = RegRpcSrvData::RDC_INVAL;
// all OK
_data->registerRequest->Return();
goto alldone;
} else if (_data->_state == RegRpcSrvData::XCH_IGNORE) {
goto alldone;
}
// no other state should be possible
LOG_ABORT("should not be reached");
alldone:
cleanupReservation();
_data.reset();
}
//-----------------------------------------------------------------------------
} // namespace slobrok
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