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// cloner.cpp - copy a database (export/import basically)
/**
* 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/>.
*/
#include "stdafx.h"
#include "pdfile.h"
#include "dbclient.h"
#include "../util/builder.h"
#include "jsobj.h"
#include "query.h"
extern int port;
bool userCreateNS(const char *ns, JSObj& j, string& err);
class Cloner: boost::noncopyable {
DBClientConnection conn;
void copy(const char *collection);
public:
Cloner() { }
bool go(const char *masterHost, string& errmsg);
};
void Cloner::copy(const char *collection) {
auto_ptr<DBClientCursor> c( conn.query(collection, emptyObj) );
assert( c.get() );
while( c->more() ) {
JSObj js = c->next();
theDataFileMgr.insert(collection, (void*) js.objdata(), js.objsize());
}
}
bool Cloner::go(const char *masterHost, string& errmsg) {
if( (string("localhost") == masterHost || string("127.0.0.1") == masterHost) && port == DBPort ) {
errmsg = "can't clone from self (localhost). sources configuration may be wrong.";
return false;
}
if( !conn.connect(masterHost, errmsg) )
return false;
string ns = client->name + ".system.namespaces";
auto_ptr<DBClientCursor> c( conn.query(ns.c_str(), emptyObj) );
if( c.get() == 0 ) {
errmsg = "query failed system.namespaces";
return false;
}
while( c->more() ) {
JSObj collection = c->next();
Element e = collection.findElement("name");
assert( !e.eoo() );
assert( e.type() == String );
const char *name = e.valuestr();
if( strstr(name, ".system.") || strchr(name, '$') )
continue;
JSObj options = collection.getObjectField("options");
if( !options.isEmpty() ) {
string err;
userCreateNS(name, options, err);
}
copy(name);
}
// now build the indexes
string system_indexes = client->name + ".system.indexes";
copy(system_indexes.c_str());
return true;
}
bool cloneFrom(const char *masterHost, string& errmsg)
{
Cloner c;
return c.go(masterHost, errmsg);
}
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