Simplify configuration of the app within the spec file

[smoya]

We want to keep this application to be configured mostly from reading an AsyncAPI file.
However, current configuration is done at proxied servers, which forces the user to modify their current servers (e.g. Kafka servers) adding a custom extension (x-eventgateway prefix).

Example:

servers:
  asyncapi-kafka-test:
    url: 'asyncapi-kafka-test-asyncapi-8f90.aivencloud.com:20472' # Kafka with 3 brokers.
    protocol: kafka-secure
    description: AsyncAPI Kafka test broker. Private.
    x-eventgateway-dial-mapping: '0.0.0.0:20473,event-gateway-demo.asyncapi.org:20473|0.0.0.0:20474,event-gateway-demo.asyncapi.org:20474|0.0.0.0:20475,event-gateway-demo.asyncapi.org:20475' # Dynamic ports starts at 20473

Instead, I suggest we rather configure the app by using the servers that describe the app.

servers:
  asyncapi-event-gateway-kafka-1:
    url: 'event-gateway-demo.asyncapi.org:28003'
    protocol: kafka
    x-eventgateway:
      proxy:
        kafka:
          server: asyncapi-kafka-test # as this is not a ref, this should be validated as we did in https://github.com/asyncapi/parser-js/pull/364
          dialMapping: '0.0.0.0:20473,event-gateway-demo.asyncapi.org:20473|0.0.0.0:20474,event-gateway-demo.asyncapi.org:20474|0.0.0.0:20475,event-gateway-demo.asyncapi.org:20475'

The benefits are multiple:

• Existing servers are not changed.
• Port binding + adverstised URL (the url of the actual application) is already available in the server.
• Application can act as proxy of several servers by just creating a new server with a different port. Also supports different protocols. For example:

  servers:
    asyncapi-event-gateway-kafka-2:
      url: 'event-gateway-demo.asyncapi.org:28004' # note this port is different, but real server behind is the same.
      x-eventgateway:
        proxy:
          kafka:
            server: another-different-asyncapi-kafka-test
    asyncapi-event-gateway-mqtt:
      url: 'event-gateway-demo.asyncapi.org:1883'
      x-eventgateway:
        proxy:
          mqtt:
            server: a-mqtt-server

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity 😴

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There can be many reasons why some specific issue has no activity. The most probable cause is lack of time, not lack of interest. AsyncAPI Initiative is a Linux Foundation project not owned by a single for-profit company. It is a community-driven initiative ruled under open governance model.

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[github-actions]

This issue has been automatically marked as stale because it has not had recent activity 😴

It will be closed in 120 days if no further activity occurs. To unstale this issue, add a comment with a detailed explanation.

There can be many reasons why some specific issue has no activity. The most probable cause is lack of time, not lack of interest. AsyncAPI Initiative is a Linux Foundation project not owned by a single for-profit company. It is a community-driven initiative ruled under open governance model.

Let us figure out together how to push this issue forward. Connect with us through one of many communication channels we established here.

Thank you for your patience ❤️

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity 😴

It will be closed in 120 days if no further activity occurs. To unstale this issue, add a comment with a detailed explanation.

There can be many reasons why some specific issue has no activity. The most probable cause is lack of time, not lack of interest. AsyncAPI Initiative is a Linux Foundation project not owned by a single for-profit company. It is a community-driven initiative ruled under open governance model.

Let us figure out together how to push this issue forward. Connect with us through one of many communication channels we established here.

Thank you for your patience ❤️