Inject values from application.yaml to XML files

[Kavya BR]

Hi all,

I am trying to inject values of my host and port from application.yaml file to my xml file.
I was planning to use parameter-factory ( org.jpos.q2.iso.ParameterFactory) but not able to find this dependency. Help ?

10_network_channel.xml

<channel-adaptor name=‘my-channel' class="org.jpos.q2.iso.ChannelAdaptor" logger="Q2">
    <channel class="org.jpos.iso.channel.NACChannel"
             packager="org.jpos.iso.packager.GenericPackager"
             type="server"
             logger="Q2"
             realm="my-channel-setup"
             parameter-factory="parameter-factory">
        <property name="host" value="${server.host}"/>
        <property name="port" value="${server.port}"/>
    </channel>
    <in>my-send</in>
    <out>my-receive</out>
    <ready>my-channel.ready</ready>
    <reconnect-delay>10000</reconnect-delay>
</channel-adaptor>


application.yml
server:
  host: localhost
  port: 8080

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[Alejandro Revilla]

You can do that out of the box if you place your YML file in cfg/default.yml.

You can keep your existing cfg/application.yml name if you use the -Eapplication parameter when you call Q2.

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[Andrés Alcarraz]

If you are trying to do this for a Spring Boot application, I see two options:

1. This one is more of a hack, at build time, create a src/dist/cfg/default.yml as a copy of your application.yaml. A symbolic link in the developer environment would also work, or you can maintain the name and use the -Eapplication option that Alejando mentions in the other response.
2. At the start of your Spring application, set the server.host and server.port system properties from the content of the Spring properties before starting Q2.

Other options may involve something like extracting the application.yaml at runtime and place it in cfg before starting Q2, I wouldn’t recommend this one. Personally, I would go for something like 2, but it’s more of a question of taste.

You could even define an Environment Provider to resolve environment properties from the Spring context, I believe this option could be a good one, but would require more experimentation and deeper jPOS knowledge.

Best regards.

Andrés Alcarraz

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