00001 /******************************************************************************* 00002 Copyright (c) 2011, Yahoo! Inc. 00003 All rights reserved. 00004 00005 Redistribution and use of this software in source and binary forms, 00006 with or without modification, are permitted provided that the following 00007 conditions are met: 00008 00009 * Redistributions of source code must retain the above 00010 copyright notice, this list of conditions and the 00011 following disclaimer. 00012 00013 * Redistributions in binary form must reproduce the above 00014 copyright notice, this list of conditions and the 00015 following disclaimer in the documentation and/or other 00016 materials provided with the distribution. 00017 00018 * Neither the name of Yahoo! Inc. nor the names of its 00019 contributors may be used to endorse or promote products 00020 derived from this software without specific prior 00021 written permission of Yahoo! Inc. 00022 00023 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 00024 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 00025 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00026 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00027 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00028 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00029 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00030 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00031 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00032 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00033 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00034 00035 The Initial Developer of the Original Code is Shravan Narayanamurthy. 00036 ******************************************************************************/ 00037 /* 00038 * Server_Helper.h 00039 * 00040 * 00041 * 00042 * Created on: 07-Jan-2011 00043 * 00044 */ 00045 00046 #ifndef SERVER_HELPER_H_ 00047 #define SERVER_HELPER_H_ 00048 00049 #include <string> 00050 00051 using namespace std; 00052 00053 00054 00055 //! Server Helper interface 00056 /** 00057 * Users of the Distributed Map need to provide 00058 * semantics for the put operation using this 00059 * helper class. 00060 * 00061 * The put operation calls helper.combine() 00062 * to perform the accumulate operation 00063 * 00064 * All server helpers must implement this interface 00065 */ 00066 class Server_Helper { 00067 public: 00068 virtual void combine(const string entity, const string& old, 00069 const string& delta, string& combined) = 0; 00070 }; 00071 00072 #endif /* SERVER_HELPER_H_ */