bool meta_server_failure_detector::acquire_leader_lock()
{
error_code err;
auto tasks =
_lock_svc->lock(
_primary_lock_id,
_local_owner_id,
true,
// lock granted
LPC_META_SERVER_LEADER_LOCK_CALLBACK,
[this, &err](error_code ec, const std::string& owner, uint64_t version)
{
err = ec;
},
// lease expire
LPC_META_SERVER_LEADER_LOCK_CALLBACK,
[this](error_code ec, const std::string& owner, uint64_t version)
{
// let's take the easy way right now
dsn_terminate();
// reset primary
//rpc_address addr;
//set_primary(addr);
//_state->on_become_non_leader();
//// set another round of service
//acquire_leader_lock();
}
);
_lock_grant_task = tasks.first;
_lock_expire_task = tasks.second;
_lock_grant_task->wait();
if (err == ERR_OK)
{
rpc_address addr;
if (addr.from_string_ipv4(_local_owner_id.c_str()))
{
dassert(primary_address() == addr, "");
set_primary(addr);
return true;
}
}
return false;
}
void meta_server_failure_detector::acquire_leader_lock()
{
//
// try to get the leader lock until it is done
//
dsn::dist::distributed_lock_service::lock_options opt = {true, true};
std::string local_owner_id;
while (true)
{
error_code err;
auto tasks =
_lock_svc->lock(
_primary_lock_id,
primary_address().to_std_string(),
// lock granted
LPC_META_SERVER_LEADER_LOCK_CALLBACK,
[this, &err, &local_owner_id](error_code ec, const std::string& owner, uint64_t version)
{
err = ec;
local_owner_id = owner;
},
// lease expire
LPC_META_SERVER_LEADER_LOCK_CALLBACK,
[this](error_code ec, const std::string& owner, uint64_t version)
{
// let's take the easy way right now
dsn_exit(0);
},
opt
);
_lock_grant_task = tasks.first;
_lock_expire_task = tasks.second;
_lock_grant_task->wait();
if (err == ERR_OK)
{
rpc_address addr;
if (addr.from_string_ipv4(local_owner_id.c_str()))
{
dassert(primary_address() == addr, "");
set_primary(addr);
break;
}
}
}
}
Service::Service(BLE_Handler * handler) :
characteristics(0), handler(handler),
handle(0) {
set_primary(true);
}
