=================================================================== RCS file: /home/cvs/OpenXM/doc/issac2000/ox-messages.tex,v retrieving revision 1.3 retrieving revision 1.6 diff -u -p -r1.3 -r1.6 --- OpenXM/doc/issac2000/ox-messages.tex 2000/01/11 05:35:48 1.3 +++ OpenXM/doc/issac2000/ox-messages.tex 2000/01/15 12:18:42 1.6 @@ -1,6 +1,6 @@ -%%$OpenXM: OpenXM/doc/issac2000/ox-messages.tex,v 1.2 2000/01/03 04:27:53 takayama Exp $ +%%$OpenXM: OpenXM/doc/issac2000/ox-messages.tex,v 1.5 2000/01/15 03:46:27 noro Exp $ -\section{OX messages} (Ohara) +\section{OX messages} An OX message for TCP/IP is a byte stream consisting of a header and a body. @@ -14,18 +14,18 @@ Header & \hspace{10mm} Body \hspace{10mm} \\ The header consists of two signed 32 bit integers. The first one is an OX tag and the second one is a serial number of the OX message. -Negative numbers are expressed by the two's complement. +%Negative numbers are expressed by the two's complement. Several byte orders including the network byte order are allowed and the byte order is determined as a part of -the establishment of a connection. See Section \ref{secsession}. +the establishment of a connection. See Section \ref{secsession} for details. -The OX messages are classifed into three types: -DATA, COMMAND, and others. -We have the following main tags for the OX messages. +The OX messages are classified into three types: +DATA, COMMAND, and SPECIAL. +We have currently the following general tags for the OX messages. \begin{verbatim} #define OX_COMMAND 513 // COMMAND #define OX_DATA 514 // DATA -#define OX_SYNC_BALL 515 // others +#define OX_SYNC_BALL 515 // SPECIAL #define OX_DATA_WITH_LENGTH 521 // DATA #define OX_DATA_OPENMATH_XML 523 // DATA #define OX_DATA_OPENMATH_BINARY 524 // DATA @@ -34,33 +34,33 @@ We have the following main tags for the OX messages. New OX tags may be added. The new tag should be classified into DATA or COMMAND. -For example, \verb+ OX_DATA_ASIR_LOCAL_BINARY + was added a few month ago +For example, \verb+ OX_DATA_ASIR_LOCAL_BINARY + was added recently to send internal serialized objects of asir via the OpenXM protocol. -This is a tag classifed to DATA. -See the home page of OpenXM to add a new tag. +This is a tag classified to DATA. +See the web page of OpenXM to add a new tag \cite{openxm-web}. +Any server is a stack machine (see Section~\ref{sec:ox-stackmachines} +for detail). +{\it OX data} message sent by a client +are pushed onto the stack of a server. +If the server gets an {\it OX command} message, then the server +executes the command. -In OpenXM, a distributed computation is done as follows: -\begin{enumerate} -\item A client requests something to a server. -\item The server does some work according to the request. -\item The client requests to send data to the server. -\item The server sends the data to the client and the client gets the data. -\end{enumerate} -The server is a stackmachine. -That is {\it OX data} message sent by the client -are pushed to the stack of the server. -If the server gets an {\it OX command} message, then the data are -popped form the stack and they are used as arguments of a function call. -For example, the asir command -\verb+ ox_push_cmo(P,1) + (push integer $1$ to the server P) +For example, the asir command {\tt ox\_push\_cmo(P,1)} +(push integer $1$ onto the server $P$) sends an OX data message -(OX\_DATA,(CMO\_ZZ,1)) to the server $P$. +{\tt (OX\_DATA,(CMO\_ZZ,1))} to the server $P$. Here, OX\_DATA stands for OX\_DATA header and -(CMO\_ZZ,1) is a body standing for $1$ expressed +{\tt (CMO\_ZZ,1)} is a body standing for $1$ expressed in the CMO data encoding format. +The server tranlates $(CMO\_ZZ, 1)$ to its own internal object fotrmat +for integers and pushs the object onto the stack. - - - - +%An OpenXM client admit that its own command sends some OX messages +%sequentially at once. +% +%For example, the asir command +%{\tt ox\_execute\_string(P, "Print[x+y]")} sends an OX data message +%{\tt (OX\_DATA, (CMO\_STRING, "Print[x+y]"))} and an OX command message +%{\tt (OX\_COMMAND, (SM\_executeStringByLocalParser))} to an OpenXM +%server.