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/**
* Copyright (C) 2012 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::kReplication
#include "mongo/platform/basic.h"
#include "mongo/db/repl/oplogreader.h"
#include <string>
#include "mongo/client/dbclientinterface.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_manager_global.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/internal_user_auth.h"
#include "mongo/executor/network_interface.h"
#include "mongo/util/log.h"
namespace mongo {
using std::shared_ptr;
using std::endl;
using std::string;
namespace repl {
bool replAuthenticate(DBClientBase* conn) {
if (isInternalAuthSet())
return conn->authenticateInternalUser();
if (getGlobalAuthorizationManager()->isAuthEnabled())
return false;
return true;
}
const Seconds OplogReader::kSocketTimeout(30);
OplogReader::OplogReader() {
_tailingQueryOptions = QueryOption_SlaveOk;
_tailingQueryOptions |= QueryOption_CursorTailable | QueryOption_OplogReplay;
/* TODO: slaveOk maybe shouldn't use? */
_tailingQueryOptions |= QueryOption_AwaitData;
// Currently find command doesn't do the cursor tracking that master-slave relies on.
_tailingQueryOptions |= DBClientCursor::QueryOptionLocal_forceOpQuery;
}
bool OplogReader::connect(const HostAndPort& host) {
if (conn() == NULL || _host != host) {
resetConnection();
_conn = shared_ptr<DBClientConnection>(
new DBClientConnection(false, durationCount<Seconds>(kSocketTimeout)));
string errmsg;
if (!_conn->connect(host, StringData(), errmsg) || !replAuthenticate(_conn.get())) {
resetConnection();
error() << errmsg << endl;
return false;
}
_conn->setTags(executor::NetworkInterface::kMessagingPortKeepOpen);
_host = host;
}
return true;
}
void OplogReader::tailCheck() {
if (cursor.get() && cursor->isDead()) {
log() << "old cursor isDead, will initiate a new one" << std::endl;
resetCursor();
}
}
void OplogReader::tailingQuery(const char* ns, const BSONObj& query) {
verify(!haveCursor());
LOG(2) << ns << ".find(" << redact(query) << ')' << endl;
cursor.reset(_conn->query(ns, query, 0, 0, nullptr, _tailingQueryOptions).release());
}
} // namespace repl
} // namespace mongo
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