The Broker TCP Agent is a gateway to the Broker whenever direct TCP/IP communication with the Broker is not possible.
Under UNIX, use the delivered script /opt/softwareag/EntireX/bin/brokeragent.bsh to start the agent.
This document covers the following topics:
The most common scenarios for using the TCP Agent are where the Java security manager does not allow direct communication with the Broker. For example, an un-trusted Java applet can only open a TCP/IP connection to a Broker which is running on the same machine as the Web server.
Although in most cases the TCP Agent will be used from a Broker application written in Java, the TCP Agent can also be used from non-Java applications as long as the Broker stubs support TCP/IP.
The TCP Agent must be used when the Java client cannot open a TCP/IP connection to the EntireX Broker due to security or firewall settings. The most prominent case is the Java sandbox model, which permits a Java applet to open only TCP/IP connections to the machine where the Web server resides. If the EntireX Broker is running on a different machine, a TCP Agent has to be run on the Web server machine.
The TCP Agent is a standalone Java application.
The class name which contains the main method is
com.softwareag.entirex.ba.BrokerAgent.
Specify the following parameters in the order given in this table when the TCP Agent listens on a TCP/IP port:
| Parameter | Explanation |
|---|---|
| 1. Trace Option | Valid values: ON or OFF. Default: OFF. A dump of the buffers is written to standard output for diagnostic purposes. |
| 2. Port Number | The port number the TCP Agent uses for incoming requests from Broker applications. This port number must be specified as part of the Broker ID in the Broker application. |
| 3. Broker Address | The TCP Agent sends all requests to this
Broker using any legal Broker ID as in EntireX Java.
The
TCP Agent will use direct TCP/IP communication if the
address is of the form Hostname, Hostname:Number, or
if it starts with tcpip:// |
| 4. Port Number for commands (optional) | The port number the TCP Agent uses for incoming commands. |
Under UNIX, the EntireX distribution kit comes with a shell script to start the TCP Agent. Change the port number and the Broker address in the script /opt/softwareag/EntireX/bin/brokeragent.bsh.
Set the parameter Trace Option to "ON". See Class Name and Parameters.
The architecture of the TCP Agent is shown in the following picture:
