add Azure Service Bus service doc

[HarshCasper]

Fixes DOC-83

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[paolosalvatori]

Thanks for the article @HarshCasper. Please find below the sections to add at the end of the article before the API Coverage section. I integrated @bblommers bullet points.

Features

The emulator includes the following core capabilities:

• Data Plane REST API: Supports message-level operations, including Send, Receive, and Peek.
• Control Plane REST API: Enables CRUD operations for namespaces and messaging entities (queues, topics, and subscriptions) via Azure Resource Manager (ARM).
• Multiple Authentication Modes: Supports both Connection String and Managed Identity authentication.
• Containerized Deployment: Runs as a lightweight, Linux-based Docker container.
• Cross-Platform Compatibility: Fully compatible with Windows, macOS, and Linux environments.
• Flexible Configuration: Manage Service Bus entities via the Service Bus Administration Client or through JSON-based configuration files.
• Advanced Streaming: Supports message streaming via the Advanced Message Queuing Protocol (AMQP).

Limitations

The current version of the emulator does not support the following:

• Protocols: JMS protocol streaming and AMQP Web Sockets (AMQP over TCP is the only supported transport).
• Messaging Patterns: Transactions, auto-forwarding (queue chaining), and message lock renewal.
• Validation: Enforcements such as maximum entity counts or maximum message sizes.
• Metrics: Property-based message counts for queues, topics, and subscriptions may be inaccurate.

The following Azure-native features are currently unavailable in the emulator:

• Scaling & Resiliency: Autoscale, Geo-disaster recovery, and Large Message support.
• Monitoring: Visual metrics, alerts, and telemetry dashboards.

Samples

Explore the following samples to get started with Service Bus on LocalStack:

• Azure Functions App with Service Bus Messaging
• Azure Service Bus with Spring Boot

[paolosalvatori]

Thanks @HarshCasper, the article looks solid. Please see my feedback and a few suggested additions in the comments below. Reach out to me and @bblommers once those are addressed, and we’ll get this approved right away.

[paolosalvatori]

I suggest you add the JSON returned by the the show and list commands:

{
  "accessedAt": "2026-03-18T10:13:18.3906198Z",
  "autoDeleteOnIdle": "P10675199DT2H48M5.4775807S",
  "countDetails": {
    "activeMessageCount": 0,
    "deadLetterMessageCount": 0,
    "scheduledMessageCount": 0,
    "transferDeadLetterMessageCount": 0,
    "transferMessageCount": 0
  },
  ...
  "name": "input",
  ...
  "status": "Active",
  "type": "Microsoft.ServiceBus/namespaces/queues",
  ...
}

and

[
  {
    "accessedAt": "2026-03-18T10:14:44.3808099Z",
    "autoDeleteOnIdle": "P10675199DT2H48M5.4775807S",
    "countDetails": {
      "activeMessageCount": 0,
      "deadLetterMessageCount": 0,
      "scheduledMessageCount": 0,
      "transferDeadLetterMessageCount": 0,
      "transferMessageCount": 0
    },
    ...
    "name": "input",
    ...
    "status": "Active",
    "type": "Microsoft.ServiceBus/namespaces/queues",
    ...
  },
  {
    "accessedAt": "2026-03-18T10:14:44.3808099Z",
    "autoDeleteOnIdle": "P10675199DT2H48M5.4775807S",
    "countDetails": {
      "activeMessageCount": 0,
      "deadLetterMessageCount": 0,
      "scheduledMessageCount": 0,
      "transferDeadLetterMessageCount": 0,
      "transferMessageCount": 0
    },
    ...
    "name": "output",
    ...
    "status": "Active",
    "type": "Microsoft.ServiceBus/namespaces/queues",
    ...
  }
]

Please add a note to remark that the information under countDetails element may not be accurate. @bblommers for visibility

[paolosalvatori]

Same as above for the azlocal servicebus queue show and azlocal servicebus queue list commands. Thanks.