Modifying the Domain Gateway Configuration File to Support Routing


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All domain gateway configuration information is stored in a binary file called BDMCONFIG. This file is created by first writing a text configuration file called DMCONFIG and then compiling it into a binary version called BDMCONFIG. The compiled BDMCONFIG file can be updated while the system is running by using the dmadmin(1) command. Although the BEA Tuxedo documentation refers to these configuration files as DMCONFIG and BDMCONFIG, you can give these files any names.

You must have one BDMCONFIG file for each BEA Tuxedo application to which you want to add Domains functionality. System access to the BDMCONFIG file is provided through the Domains administrative server, DMADM(5). When a gateway group is booted, the gateway administrative server, GWADM(5), requests from the DMADM server a copy of the configuration required by that group. The GWADM server and the DMADM server also ensure that run-time changes to the configuration are reflected in the corresponding domain gateway groups.

Note: For more information about the DMCONFIG file, refer to DMCONFIG(5) in the File Formats, Data Descriptions, MIBs, and System Processes Reference.

Description of ROUTING Section Parameters in DMCONFIG

The DM_ROUTING section provides information for data-dependent routing of service requests using FML, XML, VIEW, X_C_TYPE, and X_COMMON typed buffers. Lines within the DM_ROUTING section have the following form.

CRITERION_NAME required_parameters

where CRITERION_NAME is the name of the routing entry specified in the SERVICES section. The value of CRITERION_NAME must be a string with a maximum of 15 characters.

The following table describes the parameters in the DM_ROUTING section.

Parameter	Description
FIELD (Optional)	Specifies the name of the routing field, which is assumed to be one of the following: an FML buffer, an XML element or element attribute, a view field name identified in an FML field table (using the FLDTBLDIR and FIELDTBLS environment variables), or an FML view table (using the VIEWDIR and VIEWFILES environment variables). This information is used to obtain the associated field value for data-dependent routing when sending a message. If a field in an FML32 buffer is used for routing, it must have a field number less than or equal to 8191.
RANGES (Optional)	Specifies the ranges and associated remote domain names (RDOM) for the routing field. The value of RANGES must be a string enclosed in double quotes. The enclosed string, in turn, must consist of a comma-separated ordered list of range/RDOM pairs. The value of range may be either a single value (a signed numeric value or a character string enclosed in single quotes), or a range of the form lower - upper (where lower and upper are both signed numeric values or character strings in single quotes). The value of lower must be less than or equal to upper. A single quote embedded in a character string value, as in "O'Brien," for example, must be preceded by two back slashes: "O\\'Brien". Use MIN to indicate the minimum value for the data type of the associated FIELD. For strings and carrays, it is the null string; for character fields, it is 0; for numeric values, it is the minimum numeric value that can be stored in the field. Use MAX to indicate the maximum value for the data type of the associated FIELD. For strings and carrays, it is effectively an unlimited string of octal-255 characters; for a character field, it is a single octal-255 character; for numeric values, it is the maximum numeric value that can be stored in the field. Thus, MIN - -5 is all numbers less than or equal to -5, and 6 - MAX is all numbers greater than or equal to 6. The metacharacter * (wildcard) in the position of a range indicates any values not covered by other ranges previously seen in the entry. Only one wildcard range is allowed per entry and it should be listed last (ranges following it are ignored).
BUFTYPE (Optional)	BUFTYPE provides a list of types and subtypes of data buffers for which this routing entry is valid. Valid types are FML, VIEW, X_C_TYPE, and X_COMMON. No subtype can be specified for type FML, and subtypes are required for the other types (* is not allowed). Duplicate type/subtype pairs cannot be specified for the same routing criteria name; more than one routing entry can have the same criteria name as long as the type/subtype pairs are unique. If multiple buffer types are specified for a single routing entry, the data types of the routing field for each buffer type must be the same. If the field value is not set (for FML buffers), or does not match any specific range, and a wildcard range has not been specified, an error is returned to the application process that requested the execution of the remote service.

Routing Field Description

The value in the routing field can be any data type supported in FML or VIEW; it may be a numeric range or a string range. The following rules apply to string range values for string, carray, and character field types:

They must be enclosed by single quotation marks and cannot be preceded by a plus or minus sign.
A short or long integer value must be a string of digits, optionally preceded by a plus or minus sign.
Floating point numbers must be written in the form required by the C compiler or atof(): a plus or minus sign, followed by a string of digits (optionally containing a decimal point), then an optional e or E followed by an optional sign or space, followed by an integer.
When a field value matches a range, the associated RDOM value specifies the remote domain to which the request should be routed. An RDOM value of * indicates that the request may be sent to any remote domain known by the gateway group. Within a range/RDOM pair, the range must be separated from the RDOM by a: (colon).

Example of a 5-Site Domain Configuration Using Routing

The following sample configuration file defines a two-domain application distributed across five sites. The five sites include a Central Bank Office and four bank branches. Three of the branches belong to a BEA Tuxedo domain. The fourth branch belongs to another TP domain, and OSI-TP is used to communicate with that domain.

The example shows the BEA Tuxedo system domain gateway configuration file from the Central Bank point of view. In the DM_TDOMAIN section, this example shows a mirrored gateway for b01.

Domains Configuration File for Five Sites

# TUXEDO DOMAIN CONFIGURATION FILE FOR THE CENTRAL BANK
#
#
*DM_LOCAL_DOMAINS
# local_domain_name Gateway_Group_name domain_type domain_ID log_device
#                [audit log] [blocktime]
#                [log name] [log offset] [log size]
#                [maxrdom] [maxrdtran] [maxtran]
#                [maxdatalen] [security]
#                [tuxconfig] [tuxoffset]

#
#
DEFAULT: SECURITY = NONE
c01     GWGRP = bankg1
        TYPE = TDOMAIN
        DOMAINID = "BA.CENTRAL01"
        DMTLOGDEV = "/usr/apps/bank/DMTLOG"
        DMTLOGNAME = "DMTLG_C01"
c02     GWGRP = bankg2
        TYPE = OSITP
        DOMAINID = "BA.CENTRAL01"
        DMTLOGDEV = "/usr/apps/bank/DMTLOG"
        DMTLOGNAME = "DMTLG_C02"
        NWDEVICE = "OSITP"
        URCH = "ABCD"
#
*DM_REMOTE_DOMAINS
#remote_domain_name  domain_type domain_ID
#
b01     TYPE = TDOMAIN
        DOMAINID = "BA.BANK01"
b02     TYPE = TDOMAIN
        DOMAINID = "BA.BANK02"
b03     TYPE = TDOMAIN
        DOMAINID = "BA.BANK03"
b04     TYPE = OSITP
        DOMAINID = "BA.BANK04"
        URCH = "ABCD"
#
*DM_TDOMAIN
#
#     local_or_remote_domain_name network_address [nwdevice]
#
# Local network addresses
c01     NWADDR = "//newyork.acme.com:65432"     NWDEVICE ="/dev/tcp"
c02     NWADDR = "//192.76.7.47:65433"     NWDEVICE ="/dev/tcp"
# Remote network addresses: second b01 specifies a mirrored gateway
b01     NWADDR = "//192.11.109.5:1025" NWDEVICE = "/dev/tcp"
b01     NWADDR = "//194.12.110.5:1025" NWDEVICE = "/dev/tcp"
b02     NWADDR = "//dallas.acme.com:65432"  NWDEVICE = "/dev/tcp"
b03     NWADDR = "//192.11.109.156:4244" NWDEVICE = "/dev/tcp"
#
*DM_OSITP
#
#local_or_remote_domain_name apt aeq
#                              [aet] [acn] [apid] [aeid]
#                              [profile]
#
c02     APT = "BA.CENTRAL01"
        AEQ = "TUXEDO.R.4.2.1"
        AET = "{1.3.15.0.3},{1}"



See Also



What Is the Domains Configuration File? in Using the BEA Tuxedo Domains Component

Configuring a Domains Environment in Using the BEA Tuxedo Domains Component

Scaling, Distributing, and Tuning CORBA Applications





 

	
		
			
		
		
			
		
		
			
		
	






	
		
			 
		
	
	
		
			
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