Answer Posted / madhu
HTTP tunneling provides a way to simulate a stateful socket
connection between WebLogic Server and a Java client when
your only option is to use the HTTP protocol. It is
generally used to tunnel through an HTTP port in a security
firewall. HTTP is a stateless protocol, but WebLogic Server
provides tunneling functionality to make the connection
appear to be a regular T3Connection. However, you can
expect some performance loss in comparison to a normal
socket connection.
Configuring the HTTP Tunneling Connection
Under the HTTP protocol, a client may only make a request,
and then accept a reply from a server. The server may not
voluntarily communicate with the client, and the protocol
is stateless, meaning that a continuous two-way connection
is not possible.
WebLogic HTTP tunneling simulates a T3Connection via the
HTTP protocol, overcoming these limitations. There are two
attributes that you can configure in the Administration
Console to tune a tunneled connection for performance. It
is advised that you leave them at their default settings
unless you experience connection problems. These properties
are used by the server to determine whether the client
connection is still valid, or whether the client is still
alive.
Enable Tunneling
Enables or disables HTTP tunneling. HTTP tunneling is
disabled by default.
Note that the server must also support both the HTTP and T3
protocols in order to use HTTP tunneling.
Tunneling Client Ping
When an HTTP tunnel connection is set up, the client
automatically sends a request to the server, so that the
server may volunteer a response to the client. The client
may also include instructions in a request, but this
behavior happens regardless of whether the client
application needs to communicate with the server. If the
server does not respond (as part of the application code)
to the client request within the number of seconds set in
this attribute, it does so anyway. The client accepts the
response and automatically sends another request
immediately.
Default is 45 seconds; valid range is 20 to 900 seconds.
Tunneling Client Timeout
If the number of seconds set in this attribute have elapsed
since the client last sent a request to the server (in
response to a reply), then the server regards the client as
dead, and terminates the HTTP tunnel connection. The server
checks the elapsed time at the interval specified by this
attribute, when it would otherwise respond to the client's
request.
Default is 40 seconds; valid range is 10 to 900 seconds.
| Is This Answer Correct ? | 18 Yes | 9 No |
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