void ConnectionPool::_cleanUpOlderThan_inlock(Date_t now, ConnectionList* hostConns) {
ConnectionList::iterator iter = hostConns->begin();
while (iter != hostConns->end()) {
if (_shouldKeepConnection(now, *iter)) {
++iter;
} else {
_destroyConnection_inlock(hostConns, iter++);
}
}
}
void ConnectionPool::releaseConnection(ConnectionList::iterator iter, const Date_t now) {
boost::lock_guard<boost::mutex> lk(_mutex);
if (!_shouldKeepConnection(now, *iter)) {
_destroyConnection_inlock(&_inUseConnections, iter);
return;
}
ConnectionList& hostConns = _connections[iter->conn->getServerHostAndPort()];
_cleanUpOlderThan_inlock(now, &hostConns);
hostConns.splice(hostConns.begin(), _inUseConnections, iter);
_lastUsedHosts[iter->conn->getServerHostAndPort()] = now;
}
void ConnectionPool::destroyConnection(ConnectionList::iterator iter) {
boost::lock_guard<boost::mutex> lk(_mutex);
_destroyConnection_inlock(&_inUseConnections, iter);
}
ConnectionPool::ConnectionList::iterator ConnectionPool::acquireConnection(
const HostAndPort& target,
Date_t now,
Milliseconds timeout) {
boost::unique_lock<boost::mutex> lk(_mutex);
// Clean up connections on stale/unused hosts
_cleanUpStaleHosts_inlock(now);
for (HostConnectionMap::iterator hostConns;
((hostConns = _connections.find(target)) != _connections.end());) {
// Clean up the requested host to remove stale/unused connections
_cleanUpOlderThan_inlock(now, &hostConns->second);
if (hostConns->second.empty()) {
// prevent host from causing unnecessary cleanups
_lastUsedHosts[hostConns->first] = kNeverTooStale;
break;
}
_inUseConnections.splice(_inUseConnections.begin(),
hostConns->second,
hostConns->second.begin());
const ConnectionList::iterator candidate = _inUseConnections.begin();
lk.unlock();
try {
if (candidate->conn->isStillConnected()) {
// setSoTimeout takes a double representing the number of seconds for send and
// receive timeouts. Thus, we must take count() and divide by
// 1000.0 to get the number of seconds with a fractional part.
candidate->conn->setSoTimeout(timeout.count() / 1000.0);
return candidate;
}
}
catch (...) {
lk.lock();
_destroyConnection_inlock(&_inUseConnections, candidate);
throw;
}
lk.lock();
_destroyConnection_inlock(&_inUseConnections, candidate);
}
// No idle connection in the pool; make a new one.
lk.unlock();
std::auto_ptr<DBClientConnection> conn(new DBClientConnection);
// setSoTimeout takes a double representing the number of seconds for send and receive
// timeouts. Thus, we must take count() and divide by 1000.0 to get the number
// of seconds with a fractional part.
conn->setSoTimeout(timeout.count() / 1000.0);
std::string errmsg;
uassert(28640,
str::stream() << "Failed attempt to connect to "
<< target.toString() << "; " << errmsg,
conn->connect(target, errmsg));
conn->port().tag |= _messagingPortTags;
if (getGlobalAuthorizationManager()->isAuthEnabled()) {
uassert(ErrorCodes::AuthenticationFailed,
"Missing credentials for authenticating as internal user",
isInternalAuthSet());
conn->auth(getInternalUserAuthParamsWithFallback());
}
lk.lock();
return _inUseConnections.insert(_inUseConnections.begin(),
ConnectionInfo(conn.release(), now));
}
ConnectionPool::ConnectionList::iterator ConnectionPool::acquireConnection(
const HostAndPort& target, Date_t now, Milliseconds timeout) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
// Clean up connections on stale/unused hosts
_cleanUpStaleHosts_inlock(now);
for (HostConnectionMap::iterator hostConns;
(hostConns = _connections.find(target)) != _connections.end();) {
// Clean up the requested host to remove stale/unused connections
_cleanUpOlderThan_inlock(now, &hostConns->second);
if (hostConns->second.empty()) {
// prevent host from causing unnecessary cleanups
_lastUsedHosts[hostConns->first] = kNeverTooStale;
break;
}
_inUseConnections.splice(
_inUseConnections.begin(), hostConns->second, hostConns->second.begin());
const ConnectionList::iterator candidate = _inUseConnections.begin();
lk.unlock();
try {
if (candidate->conn->isStillConnected()) {
// setSoTimeout takes a double representing the number of seconds for send and
// receive timeouts. Thus, we must take count() and divide by
// 1000.0 to get the number of seconds with a fractional part.
candidate->conn->setSoTimeout(timeout.count() / 1000.0);
return candidate;
}
} catch (...) {
lk.lock();
_destroyConnection_inlock(&_inUseConnections, candidate);
throw;
}
lk.lock();
_destroyConnection_inlock(&_inUseConnections, candidate);
}
// No idle connection in the pool; make a new one.
lk.unlock();
std::unique_ptr<DBClientConnection> conn(new DBClientConnection());
// setSoTimeout takes a double representing the number of seconds for send and receive
// timeouts. Thus, we must take count() and divide by 1000.0 to get the number
// of seconds with a fractional part.
conn->setSoTimeout(timeout.count() / 1000.0);
if (_hook) {
uassertStatusOK(
conn->connect(target,
[this, &target](const executor::RemoteCommandResponse& isMasterReply) {
return _hook->validateHost(target, isMasterReply);
}));
auto postConnectRequest = uassertStatusOK(_hook->makeRequest(target));
// We might not have a postConnectRequest
if (postConnectRequest != boost::none) {
auto start = Date_t::now();
auto reply =
conn->runCommandWithMetadata(postConnectRequest->dbname,
postConnectRequest->cmdObj.firstElementFieldName(),
postConnectRequest->metadata,
postConnectRequest->cmdObj);
auto rcr = executor::RemoteCommandResponse(reply->getCommandReply().getOwned(),
reply->getMetadata().getOwned(),
Date_t::now() - start);
uassertStatusOK(_hook->handleReply(target, std::move(rcr)));
}
} else {
uassertStatusOK(conn->connect(target));
}
conn->port().tag |= _messagingPortTags;
if (getGlobalAuthorizationManager()->isAuthEnabled()) {
uassert(ErrorCodes::AuthenticationFailed,
"Missing credentials for authenticating as internal user",
isInternalAuthSet());
conn->auth(getInternalUserAuthParamsWithFallback());
}
lk.lock();
return _inUseConnections.insert(_inUseConnections.begin(), ConnectionInfo(conn.release(), now));
}
ConnectionPool::ConnectionList::iterator ConnectionPool::acquireConnection(
const HostAndPort& target, Date_t now, Milliseconds timeout) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
// Clean up connections on stale/unused hosts
_cleanUpStaleHosts_inlock(now);
for (HostConnectionMap::iterator hostConns;
(hostConns = _connections.find(target)) != _connections.end();) {
// Clean up the requested host to remove stale/unused connections
_cleanUpOlderThan_inlock(now, &hostConns->second);
if (hostConns->second.empty()) {
// prevent host from causing unnecessary cleanups
_lastUsedHosts[hostConns->first] = kNeverTooStale;
break;
}
_inUseConnections.splice(
_inUseConnections.begin(), hostConns->second, hostConns->second.begin());
const ConnectionList::iterator candidate = _inUseConnections.begin();
lk.unlock();
try {
if (candidate->conn->isStillConnected()) {
// setSoTimeout takes a double representing the number of seconds for send and
// receive timeouts. Thus, we must express 'timeout' in milliseconds and divide by
// 1000.0 to get the number of seconds with a fractional part.
candidate->conn->setSoTimeout(durationCount<Milliseconds>(timeout) / 1000.0);
return candidate;
}
} catch (...) {
lk.lock();
_destroyConnection_inlock(&_inUseConnections, candidate);
throw;
}
lk.lock();
_destroyConnection_inlock(&_inUseConnections, candidate);
}
// No idle connection in the pool; make a new one.
lk.unlock();
std::unique_ptr<DBClientConnection> conn;
if (_hook) {
conn.reset(new DBClientConnection(
false, // auto reconnect
0, // socket timeout
{}, // MongoURI
[this, target](const executor::RemoteCommandResponse& isMasterReply) {
return _hook->validateHost(target, BSONObj(), isMasterReply);
}));
} else {
conn.reset(new DBClientConnection());
}
// setSoTimeout takes a double representing the number of seconds for send and receive
// timeouts. Thus, we must express 'timeout' in milliseconds and divide by 1000.0 to get
// the number of seconds with a fractional part.
conn->setSoTimeout(durationCount<Milliseconds>(timeout) / 1000.0);
uassertStatusOK(conn->connect(target, StringData()));
conn->setTags(_messagingPortTags);
if (isInternalAuthSet()) {
conn->auth(getInternalUserAuthParams());
}
if (_hook) {
auto postConnectRequest = uassertStatusOK(_hook->makeRequest(target));
// We might not have a postConnectRequest
if (postConnectRequest != boost::none) {
auto start = Date_t::now();
auto reply =
conn->runCommand(OpMsgRequest::fromDBAndBody(postConnectRequest->dbname,
postConnectRequest->cmdObj,
postConnectRequest->metadata));
auto rcr = executor::RemoteCommandResponse(reply->getCommandReply().getOwned(),
Date_t::now() - start);
uassertStatusOK(_hook->handleReply(target, std::move(rcr)));
}
}
lk.lock();
return _inUseConnections.insert(_inUseConnections.begin(), ConnectionInfo(conn.release(), now));
}