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PowerBus–Sending and receiving ServiceBus messages from powershell


I have been working on implementing ServiceBus using powershell. There is to my knowledge no modules/scripts available to communicate with ServiceBus from powershell. There is a Azure powershell module on Git that enables you to create/manage Queues/namespaces, however not to send/receive messages. Let’s just jump right in and test it.





Requrements:


  1. Create a Queue on Azure and recceive the connection Information (connectionstring) (http://azure.microsoft.com/en-us/documentation/articles/service-bus-dotnet-how-to-use-queues/)
  2. Download/clone the PowerBus repository on bitbucket (https://bitbucket.org/torgro/powerbus/wiki/Home)
  3. Unblock the downloaded zip file (unblock-file –path c:\temp\PowerBus.zip)
  4. Copy the module to one of your module paths
  5. Import-Module –Name PowerBus

How to use



After importing these commands will be available for you:

image

Get-BusMessage and Send-BusMessage are used for receiving and sending messages to the Queue. These functions need to know your connection string (ConnectionString) and the name of the Queue (QueueNameString.

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You can provide those as parameters to the functions or you can add those 2 parameters with the Set-BusDefaults:

image

So if I run this: 
Set-BusDefaults -BusConnectionstring "Endpoint=sb://yourqueue.servicebus.windows.net/;SharedAccessKeyName=rootKey;SharedAccessKey=eLOdFasdaKJoiOIJhiuhO98hoihjLKH” -QueueName "testqueue"

This will add a couple of defaults to the PSDefaultParameterValues automatic variable at the module scope which will add the connection string and queuename as parameters when you call Get-BusMessage or Send-BusMessage. You can retrieve the current connection string and queue name with the Get-BusDefaults function.

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So with the connection string set and the queue name added, we can start to send messages to the queue with Send-BusMessage:

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We can retrieve the message with the Get-BusMessage command

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The ServiceBus queue implements the FIFO principle (first in, first out). To de-queue messages, use the switch parameter dequeue. Default is peek mode when you run Get-BusMessage without the switch parameter. As you can see in the screenshot above, I first run Get-BusMessage to peek at the message, run it with the dequeue switch and finally try to get the message again with Get-BusMessage which returns $null (no messages in the queue).

Cheers

Tore

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