Sending Data over TCP on wso2 ESB - tcp

Question

I have created a code where an external system can call wso2 esb over TCP and pass data, this is working fine without any issues however the reverse process is not happening and i am getting confused.
Here i would need to pass certain data to external system over TCP, however i am unable to do so as the parameters which are available while developing proxy doesn't contain IP address, it just contain port number, so i am curious as to how can the communication even be established when the IP address is not mentioned in the proxy.
Any help is appreciated.
<proxy xmlns="http://ws.apache.org/ns/synapse"
name="TCPProxyClient"
startOnLoad="true"
statistics="disable"
trace="disable"
transports="http,https">
<target>
<inSequence>
<property name="symbol" scope="default" type="STRING" value="IBM"/>
<enrich>
<source clone="true" type="inline">
<m:getQuote xmlns:m="http://services.samples">
<m:request>
<m:symbol>?</m:symbol>
</m:request>
</m:getQuote>
</source>
<target type="body"/>
</enrich>
<enrich>
<source clone="true" property="symbol" type="property"/>
<target xmlns:m="http://services.samples" xpath="//m:getQuote/m:request/m:symbol"/>
</enrich>
<log level="full" separator=","/>
<send/>
</inSequence>
<outSequence>
<log level="full"/>
<send/>
</outSequence>
</target>
<parameter name="transport.tcp.responseClient">true</parameter>
<parameter name="transport.tcp.inputType">string</parameter>
<parameter name="transport.tcp.recordDelimiter">|</parameter>
<parameter name="transport.tcp.contentType">text/xml</parameter>
<parameter name="transport.tcp.port">8691</parameter>
<parameter name="transport.tcp.recordDelimiterType">character</parameter>
<description/>
</proxy>

Answer 1

The parameters above are used only when the proxy is listening for TCP messages. For sending a TCP message to a TCP socket, you need to define an endpoint in the send mediator.
<send>
<endpoint>
<address uri="tcp://localhost:8001/helloService"/>
</endpoint>
<send>
Follow the doc [1] to enable to TCP transport sender in axis2.xml.
Refer the question [2] for more info.