liboh/plugins/cassandra/CassandraPersistedObjectSet.hpp

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/*  Sirikata
 *  CassandraPersistedObjectSet.hpp
 *
 *  Copyright (c) 2010, Stanford University
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
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 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
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 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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#ifndef __SIRIKATA_OH_CASSANDRA_PERSISTED_OBJECT_SET_HPP__
#define __SIRIKATA_OH_CASSANDRA_PERSISTED_OBJECT_SET_HPP__

#include <sirikata/oh/PersistedObjectSet.hpp>
#include <sirikata/cassandra/Cassandra.hpp>

namespace Sirikata {
namespace OH {

class CassandraPersistedObjectSet : public PersistedObjectSet {
public:
    typedef std::tr1::function<void(bool success)> RequestCallback;

    CassandraPersistedObjectSet(ObjectHostContext* ctx, const String& host, int port, const String& oh_id);
    virtual ~CassandraPersistedObjectSet();

    /* Service Interface */
    virtual void start();
    virtual void stop();

    virtual void requestPersistedObject(const UUID& internal_id, const String& script_type, const String& script_args, const String& script_contents, RequestCallback cb, const String& timestamp="current");

private:

    void initDB();
    void performUpdate(const UUID& internal_id, const String& script_type, const String& script_args, const String& script_contents, RequestCallback cb, const String& timestamp="current");

    ObjectHostContext* mContext;
    String mDBHost;
    int mDBPort;
    String mOHostID;  // Object Host ID
    CassandraDBPtr mDB;

    // FIXME because we don't have proper multithreaded support in cppoh, we
    // need to allocate our own thread dedicated to IO
    Network::IOService* mIOService;
    Network::IOWork* mWork;
    Thread* mThread;
};

} //end namespace OH
} //end namespace Sirikata

#endif //__SIRIKATA_OH_CASSANDRA_PERSISTED_OBJECT_SET_HPP__