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// @file multicmd.h
/**
* 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.
*/
#pragma once
#include "mongo/db/repl/connections.h"
#include "mongo/util/background.h"
namespace mongo {
struct Target {
Target(string hostport) : toHost(hostport), ok(false) { }
//Target() : ok(false) { }
const string toHost;
bool ok;
BSONObj result;
};
/** send a command to several servers in parallel. waits for all to complete before
returning.
in: Target::toHost
out: Target::result and Target::ok
*/
void multiCommand(BSONObj cmd, list<Target>& L);
class _MultiCommandJob : public BackgroundJob {
public:
BSONObj& cmd;
Target& d;
_MultiCommandJob(BSONObj& _cmd, Target& _d) : cmd(_cmd), d(_d) { }
private:
string name() const { return "MultiCommandJob"; }
void run() {
try {
ScopedConn c(d.toHost);
LOG(1) << "multiCommand running on host " << d.toHost;
d.ok = c.runCommand("admin", cmd, d.result);
LOG(1) << "multiCommand response: " << d.result;
}
catch (const DBException& e) {
LOG(1) << "dev caught " << e.what() << " on multiCommand to " << d.toHost;
}
}
};
inline void multiCommand(BSONObj cmd, list<Target>& L) {
list< shared_ptr<BackgroundJob> > jobs;
for( list<Target>::iterator i = L.begin(); i != L.end(); i++ ) {
Target& d = *i;
_MultiCommandJob *j = new _MultiCommandJob(cmd, d);
jobs.push_back( shared_ptr<BackgroundJob>(j) );
j->go();
}
for( list< shared_ptr<BackgroundJob> >::iterator i = jobs.begin(); i != jobs.end(); i++ ) {
(*i)->wait();
}
}
}
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