Subscribing to a queue and publishing to Exchange Fanout

The Devprime platform natively supports RabbitMQ, an open-source messaging software that operates on the basis of Advanced Message Queuing Protocol (AMQP). Use an exchange fanout and subscribe to a queue.

Subscribe to a queue in RabbitMQ using a “Fanout” Exchange

In the JSON example below, the “Exchange” and “ExchangeType” parameters have been added, setting the Exchange type to “fanout” and using the queues item to “in-fanout-01”.

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 "DevPrime_Stream": [
    {
      "Alias": "Stream1",
      "Enable": "true",
      "Default": "true",
      "StreamType": "RabbitMQ",
      "HostName": "Localhost",
      "User": "guest",
      "Password": "guest",
      "Port": "5672",
      "Exchange": "devprime",
      "ExchangeType": "direct",
      "Retry": "3",
      "Fallback": "State1",
      "Threads": "30",
      "Buffer": "1",
      "Subscribe": [
        {
          "Exchange": "dp-fanout",
          "ExchangeType": "fanout",
          "queues": "in-fanout-01"
        }
      ]
    }
  ],

YAML example with application settings:

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- name: devprime_stream1
    value: "alias=Stream1|||enable=true|||default=true|||
    streamtype=RabbitMQ|||hostname=rabbitmq.default.svc|||
    user=guest|||password=guest|||port=5672|||exchange=devprime|||
    exchangetype=direct|||retry=3|||fallback=State1|||threads=30|||buffer=5|||
    subscribe=[exchange=dp-fanout,exchangetype=fanout,queues=in-fanout-01]"

Setting Up Publish/Subscribe Using an Exchange “Fanout”

In the example presented in the JSON below, you will notice that in addition to the “Subscribe” parameter in the Exchange “dp-fanout”, we have added a “Publish” parameter to allow the publication of events in the Exchange Fanout “dp-fanout-global”. In the example, you can also see the “Subscribe” in the “ms-order-in” queue, linked to the default Exchange “devprime”.

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 "DevPrime_Stream": [
    {
      "Alias": "Stream1",
      "Enable": "true",
      "Default": "true",
      "StreamType": "RabbitMQ",
      "HostName": "Localhost",
      "User": "guest",
      "Password": "guest",
      "Port": "5672",
      "Exchange": "devprime",
      "ExchangeType": "direct",
      "Retry": "3",
      "Fallback": "State1",
      "Threads": "30",
      "Buffer": "1",
      "Publish": [
        {
          "Exchange": "dp-fanout-global",
          "ExchangeType": "fanout"
        }
      ],
      "Subscribe": [
        {
          "Exchange": "dp-fanout",
          "ExchangeType": "fanout",
          "queues": "in-fanout-01"
        },
        {
          "queues": "ms-order-in"
        }
      ]
    }
  ],

Example in the application log with this configuration:

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[INF][ms-order][Stream][Type "RabbitMQ"][Alias "Stream1"]
["Enable"][Subscribe]["in-fanout-01,ms-order-in"]
[Parallel "30"][Buffer "1"]

YAML example with application settings:

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- name: devprime_stream1
    value: "alias=Stream1|||enable=true|||default=true|||streamtype=RabbitMQ|||
    hostname=rabbitmq.default.svc|||user=guest|||password=guest|||
    port=5672|||exchange=devprime|||exchangetype=direct|||retry=3|||
    fallback=State1|||threads=30|||buffer=5|||
    publish=[exchange=dp-fanout-global,exchangetype=fanout]|||
    subscribe=[exchange=dp-fanout,exchangetype=fanout,queues=in-fanout-01]
    [queues=ms-order-in]"
Last modified August 20, 2024 (2f9802da)