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Apache web server to Borland web container connectivity
Table 5.1
IIOP connector attributes (continued)
Attribute Default Description
canBufferHttp10Data true When the HTTP protocol is less than 1.1 and the content
length is not set on a servlet, the following two choices are
available for the web container. It can buffer up the data,
compute the content length, and then send the response or
it can raise an error message. To avoid buffering the data
and consuming memory, set this attribute to false.For more
information, go to “Browsers supporting only the HTTP 1.0
protocol” on page 49.
shortSessionId false To enable the use of the Borland “collapsed locator” feature
that reduces the size of the IIOP connectors session id, set
to true. By default, this attribute is disabled; set to false.
The IIOP connector uses a stringified object reference (IOR)
as a means to associate a client with a given Borland web
container (service affinity). Some network routers and
browser implementations are unable to cope with the large
payload stored within the Session Id Cookie.
To resolve this problem, Borland has developed the
collapsed locator string that allows service affinity to be
implemented using a much shorter session id string. Setting
shortSessionId to true enables this feature, setting it to false
or omitting the parameter entirely, defaults to the
conventional IOR-based solution.
Note: The “collapsed locator” is essentially an encoded
CORBALOC string. Resolving a CORBALOC string to an
object-reference is a more costly operation than the
equivalent operation on an IOR. To alleviate this extra cost,
the Apache web server will maintain a look-aside list of
encoded CORBALOC strings to their resolved object
references. This will incur a slight increase in memory use
per Apache web server.
Important: In order for the shortSessionID feature to work
correctly, you must specify a port value for the IIOP
connector; you cannot use the port default value of 0 (zero).
Modifying the IIOP configuration in Apache
The httpd.conf file is the global configuration file for the Apache web server. Within the
httpd.conf file are the following lines which pertain to the IIOP connector.
Windows LoadModule iiop2_module /lib//
mod_iiop2.dll
IIopLogFile /var/domains//
configurations//mos//
logs/mod_iiop.log
IIopLogLevel error
IIopClusterConfig /var/domains//
configurations//mos//
conf/WebClusters.properties
IIopMapFile /var/domains//
configurations//mos//
conf/UriMapFile.properties
Chapter 5: Web server to web container connectivity 43