message.cpp

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00001 /*
00002  * message.cpp
00003  *
00004  * Copyright (C) 2007  Thomas A. Vaughan
00005  * All rights reserved.
00006  *
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions are met:
00010  *     * Redistributions of source code must retain the above copyright
00011  *       notice, this list of conditions and the following disclaimer.
00012  *     * Redistributions in binary form must reproduce the above copyright
00013  *       notice, this list of conditions and the following disclaimer in the
00014  *       documentation and/or other materials provided with the distribution.
00015  *     * Neither the name of the <organization> nor the
00016  *       names of its contributors may be used to endorse or promote products
00017  *       derived from this software without specific prior written permission.
00018  *
00019  * THIS SOFTWARE IS PROVIDED BY THOMAS A. VAUGHAN ''AS IS'' AND ANY
00020  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00021  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00022  * DISCLAIMED. IN NO EVENT SHALL THOMAS A. VAUGHAN BE LIABLE FOR ANY
00023  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
00024  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00025  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00026  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00027  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00028  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029  *
00030  *
00031  * Payload construction routines.  See message.h
00032  */
00033 
00034 // includes --------------------------------------------------------------------
00035 #include "message.h"            // always include our own header first!
00036 
00037 #include "datahash/datahash_util.h"
00038 #include "datahash/datahash_text.h"
00039 #include "perf/perf.h"
00040 
00041 
00042 namespace aesop {
00043 
00044 
00045 ////////////////////////////////////////////////////////////////////////////////
00046 //
00047 //      public API
00048 //
00049 ////////////////////////////////////////////////////////////////////////////////
00050 
00051 void
00052 getTcpPayload
00053 (
00054 IN const char * data,
00055 OUT tcp_payload_t& payload
00056 )
00057 {
00058         perf::Timer timer("aesop::getTcpPayload");
00059         ASSERT(data, "null");
00060         payload.clear();
00061 
00062         // TODO: is this efficient?
00063         std::istringstream iss(data);
00064 
00065         // get master hash
00066         smart_ptr<Datahash> master = readHashFromStream("datagram", iss);
00067         ASSERT(master, "null hash after deserialization?");
00068 //      dumpHash("deserialized message", master);
00069 
00070         // parse header fields
00071         smart_ptr<Datahash> header = getSubhash(master, "header");
00072         ASSERT(header, "null subhash");
00073 
00074         payload.namespace_ = getString(header, "namespace");
00075         payload.command = getString(header, "command");
00076 
00077         // get arguments (data)
00078         payload.arguments = getSubhash(master, "data");
00079         ASSERT(payload.arguments, "null data hash");
00080 }
00081 
00082 
00083 
00084 };      // aesop namespace
00085