/**
* Copyright (C) 2013 MongoDB 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 .
*
* 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.
*/
#pragma once
#include
#include "mongo/bson/bsonobj.h"
#include "mongo/s/multi_command_dispatch.h"
namespace mongo {
/**
* A DBClientMultiCommand uses the client driver (DBClientConnections) to send and recv
* commands to different hosts in parallel.
*
* See MultiCommandDispatch for more details.
*/
class DBClientMultiCommand : public MultiCommandDispatch {
public:
DBClientMultiCommand() : _timeoutMillis( 0 ) {}
~DBClientMultiCommand();
void addCommand( const ConnectionString& endpoint,
const StringData& dbName,
const BSONSerializable& request );
void sendAll();
int numPending() const;
Status recvAny( ConnectionString* endpoint, BSONSerializable* response );
void setTimeoutMillis( int milliSecs );
private:
// All info associated with an pre- or in-flight command
struct PendingCommand {
PendingCommand( const ConnectionString& endpoint,
const StringData& dbName,
const BSONObj& cmdObj );
// What to send
const ConnectionString endpoint;
const std::string dbName;
const BSONObj cmdObj;
// Where to send it
DBClientBase* conn;
// If anything goes wrong
Status status;
};
typedef std::deque PendingQueue;
PendingQueue _pendingCommands;
int _timeoutMillis;
};
}