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81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// d_writeback.cpp
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/**
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* Copyright (C) 2008 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pch.h"
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#include "../db/commands.h"
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#include "../db/jsobj.h"
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#include "../db/dbmessage.h"
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#include "../db/query.h"
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#include "../client/connpool.h"
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#include "../util/queue.h"
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#include "shard.h"
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using namespace std;
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namespace mongo {
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map< string , BlockingQueue<BSONObj>* > writebackQueue;
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mongo::mutex writebackQueueLock("sharding:writebackQueueLock");
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BlockingQueue<BSONObj>* getWritebackQueue( const string& remote ){
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scoped_lock lk (writebackQueueLock );
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BlockingQueue<BSONObj>*& q = writebackQueue[remote];
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if ( ! q )
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q = new BlockingQueue<BSONObj>();
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return q;
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}
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void queueWriteBack( const string& remote , const BSONObj& o ){
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getWritebackQueue( remote )->push( o );
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}
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// Note, this command will block until there is something to WriteBack
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class WriteBackCommand : public Command {
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public:
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virtual LockType locktype() const { return NONE; }
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virtual bool slaveOk() const { return true; }
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virtual bool adminOnly() const { return true; }
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WriteBackCommand() : Command( "writebacklisten" ){}
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void help(stringstream& h) const { h<<"internal"; }
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bool run(const string& , BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool){
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BSONElement e = cmdObj.firstElement();
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if ( e.type() != jstOID ){
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errmsg = "need oid as first value";
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return 0;
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}
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const OID id = e.__oid();
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BSONObj z = getWritebackQueue(id.str())->blockingPop();
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log(1) << "WriteBackCommand got : " << z << endl;
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result.append( "data" , z );
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return true;
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}
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} writeBackCommand;
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}
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