我如何在 wso2 ESB/EI 中向我的地址端点添加值

Question

i want to add values dynamically to adress endpoint in the proxy in wso2 ESB/EI

<address uri="mqtt:/SampleProxy?mqtt.server.host.name=thingsboard.cloud&amp;mqtt.server.port=1883&amp;mqtt.client.id=esb.test.sender&amp;mqtt.topic.name=v1/devices/me/telemetry&amp;mqtt.subscription.qos=0&amp;mqtt.blocking.sender=true&amp;mqtt.subscription.username=25416990;">

lets say for exemple i want to add "test" at the end of the endpoint how i can do this?

Answer 1

For a similar problem, but with sending msg to rabbitmq, I created template, where i set exchangeName and routingKey dynamicaly. In the same manner, you can create your own template. You need to create Header named "To" and using XPATH concate interesting address endpoint, and for dynamic values you just use $func: {parameter name} Something like below:

<?xml version="1.0" encoding="UTF-8"?>
<template xmlns="http://ws.apache.org/ns/synapse" name="rabbitmq.sender">
   <parameter name="exchangeName"/>
   <parameter name="routingKey"/>
   <sequence>
      <property name="OUT_ONLY" value="true" scope="default" type="STRING"/>
      <header name="To"
              scope="default"
              expression="concat('rabbitmq:/?rabbitmq.connection.factory=CachedRabbitMQConnectionFactory&amp;rabbitmq.exchange.name=',$func:exchangeName,'&amp;rabbitmq.queue.routing.key=',$func:routingKey)"/>
      <send/>
   </sequence>
</template>

To use that, call-template mediator is needed. In brackets you can put expression, like below:

<call-template target="send.rabbitmq">
    <with-param name="exchangeName" value="test"/>
    <with-param name="routingKey" value="{get-property('testValue')}"/>
</call-template>