Status variables and protocol header

The general structure of communication is described below.

Status variables

Variable	Description	Data type
TN	Transaction number	Unsigned long
ID	Id of the hotel in SIHOT.WEB.	String
RC	State of the message, 0 = OK, otherwise errors.	Short
OC	Id of the protocol, e. g. RES = reservation	String
MSG	Message/error message	String
VER	Version, current 2.1	Decimal

Protocol header

Protocol header with status variables:

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-DOCUMENT>
        <SIHOT-Version>
                <Version>9.0</Version>
                <EXE>sinetres.exe</EXE>
        </SIHOT-Version>
        <VER>2.0</VER>
        <OC>ACK</OC>
        <ID>1</ID>
        <TN>1</TN>
        <RC>0</RC>
        <MSG>OK</MSG>
</SIHOT-DOCUMENT>

The example above shows an answer of SIHOT.WEB, in the case that no error has occurred.

In case of a request by SIHOT.PMS or SIHOT.WEB, only the variables TN, ID and OC are required. With an answer, additional RC must be set. MSG does not have to be set necessarily. With requests of other external systems, this applies likewise, however ID does not have to be set.

Debugging and performance

To enable enhanced logging, to retrieve performance information or to manipulate performance, there are several possibilities:

Command/Request	Description
APLLOG	Activate application logging
ADOPERFLOG	Activate SQL database access logging
DUMP-DATA	Log several information into log file
RESET-STATCOUNTERS	Reset status counters
TUNE-WORKING-SET	Set working set values

APLLOG

To activate the so called APL-Logging, you need to add the element APLLOG with value TRUE to your requests: Example:

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-Document>
    <ID>1</ID>
    <OC>RES</OC>
    <APLLOG>TRUE</APLLOG>
    <ARESLIST>
        <RESERVATION>
            <GDSNO>20120611T1225</GDSNO>
            <NAME1>Doe</NAME1>
            <NAME2>John</NAME2>
            <ARR>2013-04-11</ARR>
            <DEP>2013-04-12</DEP>
            <NOROOMS>1</NOROOMS>
            <NOPAX>1</NOPAX>
            <CAT>EZ</CAT>
        </RESERVATION>
    </ARESLIST>
</SIHOT-Document>

Any errors on application level will be logged, then.

ADOPERFLOG

To receive the SIHOT ADO performance log in an SQL database environment, you need to add this element with the value TRUE to any request. Example:

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-Document>
    <ID>1</ID>
    <OC>RES</OC>
    <ADOPERFLOG>TRUE</ADOPERFLOG>
    <ARESLIST>
        <RESERVATION>
            <GDSNO>20120611T1243</GDSNO>
            <NAME1>Doe</NAME1>
            <NAME2>John</NAME2>
            <ARR>2013-04-11</ARR>
            <DEP>2013-04-12</DEP>
            <NOROOMS>1</NOROOMS>
            <NOPAX>1</NOPAX>
            <CAT>EZ</CAT>
        </RESERVATION>
    </ARESLIST>
</SIHOT-Document>

Answer: In the answer the Block SIHOT-ADOPERFLOG is added. Inside this Block, there is a LINES-Block with several LINE-Elements, each representing a single database access.

DUMP-DATA

This request is used to log several interface cache information into the logfile. This data is not returned in the response to this request. Example:

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-Document>
    <OC>DUMP-DATA</OC>
    <TN>1234</TN>
    <ID>1</ID>
    <SCOPE>BARCACHE;BARLINK</SCOPE>
</SIHOT-Document>

Element	Description	Data Type	Usage
OC	Operation code = “DUMP-DATA”	String	Mandatory
TN	Transaction number	Long	Optional
ID	ID of the hotel	Unsigned Long	Mandatory
SCOPE	List of data to be dumped	String	Mandatory

Available scopes are:

Scope	Description
BARCACHE	This scope logs the BAR Production cache into the logfile.
BARLINK	This scope logs the BAR link into the logfile.

RESET-STATCOUNTERS

With this request you could reset the status counters. The status is logged into the logfile after each request and it returns the average time to process each type of request, e.g.: Average time to process RR requests was 785.07 milliseconds! Average time to process RES requests was 15073.62 milliseconds! Example:

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-Document>
        <OC>RESET-STATCOUNTERS</OC>
        <TN>1234</TN>
        <ID>1</ID>
</SIHOT-Document>

TUNE-WORKING-SET

*** Experimental state ***

Sets the current working set to the following values:

Minimum	320 MB
Maximum	640 MB

There’s no need to use this request for Windows Server 2008 or higher. See http://msdn.microsoft.com/en-us/library/windows/desktop/ms686234%28v=vs.85%29.aspx for more information.