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// @file s/client_info.cpp
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/client/connpool.h"
#include "mongo/db/auth/authorization_manager_global.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/authz_session_external_state_s.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/server_status_metric.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/stats/counters.h"
#include "mongo/db/stats/timer_stats.h"
#include "mongo/s/write_ops/batch_downconvert.h"
#include "mongo/s/client_info.h"
#include "mongo/s/config.h"
#include "mongo/s/chunk.h"
#include "mongo/s/cursors.h"
#include "mongo/s/grid.h"
#include "mongo/s/request.h"
#include "mongo/server.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
using std::string;
using std::stringstream;
ClientInfo::ClientInfo(AbstractMessagingPort* messagingPort) : ClientBasic(messagingPort) {
_cur = &_a;
_prev = &_b;
_autoSplitOk = true;
if (messagingPort) {
_remote = messagingPort->remote();
}
}
ClientInfo::~ClientInfo() {
}
void ClientInfo::addShardHost( const string& shardHost ) {
_cur->shardHostsWritten.insert( shardHost );
_sinceLastGetError.insert( shardHost );
}
void ClientInfo::addHostOpTime(ConnectionString connStr, HostOpTime stat) {
_cur->hostOpTimes[connStr] = stat;
}
void ClientInfo::addHostOpTimes( const HostOpTimeMap& hostOpTimes ) {
for ( HostOpTimeMap::const_iterator it = hostOpTimes.begin();
it != hostOpTimes.end(); ++it ) {
addHostOpTime(it->first, it->second);
}
}
void ClientInfo::newPeerRequest( const HostAndPort& peer ) {
if ( ! _remote.hasPort() )
_remote = peer;
else if ( _remote != peer ) {
stringstream ss;
ss << "remotes don't match old [" << _remote.toString() << "] new [" << peer.toString() << "]";
throw UserException( 13134 , ss.str() );
}
newRequest();
}
void ClientInfo::newRequest() {
_lastAccess = (int) time(0);
RequestInfo* temp = _cur;
_cur = _prev;
_prev = temp;
_cur->clear();
}
ClientInfo* ClientInfo::create(AbstractMessagingPort* messagingPort) {
ClientInfo * info = _tlInfo.get();
massert(16472, "A ClientInfo already exists for this thread", !info);
info = new ClientInfo(messagingPort);
info->setAuthorizationSession(new AuthorizationSession(
new AuthzSessionExternalStateMongos(getGlobalAuthorizationManager())));
_tlInfo.reset( info );
info->newRequest();
return info;
}
ClientInfo * ClientInfo::get(AbstractMessagingPort* messagingPort) {
ClientInfo * info = _tlInfo.get();
if (!info) {
info = create(messagingPort);
}
massert(16483,
mongoutils::str::stream() << "AbstractMessagingPort was provided to ClientInfo::get"
<< " but differs from the one stored in the current ClientInfo object. "
<< "Current ClientInfo messaging port "
<< (info->port() ? "is not" : "is")
<< " NULL",
messagingPort == NULL || messagingPort == info->port());
return info;
}
bool ClientInfo::exists() {
return _tlInfo.get();
}
ClientBasic* ClientBasic::getCurrent() {
return ClientInfo::get();
}
void ClientInfo::disconnect() {
// should be handled by TL cleanup
_lastAccess = 0;
}
void ClientInfo::disableForCommand() {
RequestInfo* temp = _cur;
_cur = _prev;
_prev = temp;
}
static TimerStats gleWtimeStats;
static ServerStatusMetricField<TimerStats> displayGleLatency( "getLastError.wtime", &gleWtimeStats );
boost::thread_specific_ptr<ClientInfo> ClientInfo::_tlInfo;
// Look for $gleStats in a command response, and fill in ClientInfo with the data,
// if found.
// This data will be used by subsequent GLE calls, to ensure we look for the correct
// write on the correct PRIMARY.
void saveGLEStats(const BSONObj& result, const std::string& hostString) {
if (!ClientInfo::exists()) {
return;
}
if (result[kGLEStatsFieldName].type() != Object) {
return;
}
std::string errmsg;
ConnectionString shardConn = ConnectionString::parse(hostString, errmsg);
BSONElement subobj = result[kGLEStatsFieldName];
OpTime lastOpTime = subobj[kGLEStatsLastOpTimeFieldName]._opTime();
OID electionId = subobj[kGLEStatsElectionIdFieldName].OID();
ClientInfo* clientInfo = ClientInfo::get( NULL );
LOG(4) << "saveGLEStats lastOpTime:" << lastOpTime
<< " electionId:" << electionId;
clientInfo->addHostOpTime(shardConn, HostOpTime(lastOpTime, electionId));
}
} // namespace mongo
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