B4X

Azure Service Bus - Send Message to Queue

See more Azure Service Bus Examples

Demonstrates sending a message to an Azure Service Bus Queue. B4X

Dim success As Boolean = False

'  Note: Requires Chilkat v9.5.0.65 or greater.

'  This requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  Make the initial connection.
'  A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
'  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
'  then it will be automatically re-established as needed.
Dim rest As ChilkatRest
rest.Initialize("rest")
Dim bAutoReconnect As Boolean = True
success = rest.Connect("<yournamespace>.servicebus.windows.net", 443, True, bAutoReconnect)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


'  ----------------------------------------------------------------------------------------------
'  The code above this comment could be placed inside a function/subroutine within the application
'  because the connection does not need to be made for every request.  Once the connection is made
'  the app may send many requests..
'  ----------------------------------------------------------------------------------------------

'  Let's load a previously computed SAS token and use it.
'  See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
Dim sbToken As ChilkatStringBuilder
sbToken.Initialize
sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt", "utf-8")

'  Tell the REST object to use the Azure Shared Access Signature for authorization.
sbToken.Prepend("SharedAccessSignature ")
rest.AddHeader("Authorization", sbToken.GetAsString)

'  ----------------------------------------------------------------------------------------------

'  Send to a queue named "gila";
Dim queueName As String = "gila"

'  The HTTP request body contains the content of the message sent to the queue.
Dim sbRequestBody As ChilkatStringBuilder
sbRequestBody.Initialize
sbRequestBody.Append("Hello, I'm a gila monster, and I may bite!")

'  Build the path..
Dim sbPath As ChilkatStringBuilder
sbPath.Initialize
sbPath.Append("/")
sbPath.Append(queueName)
sbPath.Append("/messages")

'  Add timeout and api-version query parameters.
rest.AddQueryParam("timeout", "20")
rest.AddQueryParam("api-version", "2013-08")

'  Standard brokered message properties are placed in a BrokerProperties HTTP header. 
'  The broker properties must be serialized in JSON format. To specify a TimeToLive value of 3600 seconds 
'  and to add a message label "M1" to the message..
Dim json As ChilkatJsonObject
json.Initialize
json.AppendInt("TimeToLive", 3600)
json.AppendString("Label", "M1")
rest.AddHeader("BrokerProperties", json.Emit)

'  To add custom properties, such as "Priority" and "Color"
rest.AddHeader("Priority", "High")
rest.AddHeader("Customer", "12345")

Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
success = rest.FullRequestSb("POST", sbPath.GetAsString, sbRequestBody, sbResponseBody)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


Log("Response Status Code = " & rest.ResponseStatusCode)

'  Check for a success response.
If rest.ResponseStatusCode <> 201 Then
    Log(rest.LastRequestStartLine)
    Log(rest.LastRequestHeader)
    Log(sbResponseBody.GetAsString)
    Log("Failed.")
    Return
End If


'  If successful, the 201 response will have no response body.

Log("Success.")