Xojo Plugin

Azure Service Bus - Send Batch of Messages to Topic or Queue

See more Azure Service Bus Examples

Shows how to send a batch of messages to a service bus queue or topic. Xojo Plugin

Dim success As Boolean
success = 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 New Chilkat.Rest
Dim bAutoReconnect As Boolean
bAutoReconnect = True
success = rest.Connect("<yournamespace>.servicebus.windows.net",443,True,bAutoReconnect)
If (success <> True) Then
    System.DebugLog(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 New Chilkat.StringBuilder
success = sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8")

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

// ----------------------------------------------------------------------------------------------

// Send to a topic (or queue) named "gilaMonster";
Dim topicOrQueueName As String
topicOrQueueName = "gilaMonster"

// The HTTP request body contains JSON that contains multiple messages.
Dim json As New Chilkat.JsonObject
json.I = 0
success = json.UpdateString("messages[i].Body","This is the first message")
success = json.UpdateString("messages[i].BrokerProperties.Label","M1")
success = json.UpdateString("messages[i].BrokerProperties.TimeToLiveTimeSpan","0.00:00:40")

json.I = 1
success = json.UpdateString("messages[i].Body","This is the second message")
success = json.UpdateString("messages[i].BrokerProperties.Label","M2")
success = json.UpdateString("messages[i].UserProperties.Priority","Low")

json.I = 2
success = json.UpdateString("messages[i].Body","This is the third message")
success = json.UpdateString("messages[i].BrokerProperties.Label","M3")
success = json.UpdateString("messages[i].UserProperties.Priority","Medium")
success = json.UpdateString("messages[i].UserProperties.Customer","ABC")

Dim jsonA As Chilkat.JsonArray
jsonA = json.ArrayOf("messages")
jsonA.EmitCompact = False
System.DebugLog(jsonA.Emit())

// The following JSON array is produced by the above code:

// 	[
// 	  {
// 	    "Body": "This is the first message",
// 	    "BrokerProperties": {
// 	      "Label": "M1",
// 	      "TimeToLiveTimeSpan": "0.00:00:40"
// 	    }
// 	  },
// 	  {
// 	    "Body": "This is the second message",
// 	    "BrokerProperties": {
// 	      "Label": "M2"
// 	    },
// 	    "UserProperties": {
// 	      "Priority": "Low"
// 	    }
// 	  },
// 	  {
// 	    "Body": "This is the third message",
// 	    "BrokerProperties": {
// 	      "Label": "M3"
// 	    },
// 	    "UserProperties": {
// 	      "Priority": "Medium",
// 	      "Customer": "ABC"
// 	    }
// 	  }
// 	]

Dim sbRequestBody As New Chilkat.StringBuilder
jsonA.EmitCompact = True
success = jsonA.EmitSb(sbRequestBody)

// Build the path..
Dim sbPath As New Chilkat.StringBuilder
success = sbPath.Append("/")
success = sbPath.Append(topicOrQueueName)
success = sbPath.Append("/messages")

// Add timeout and api-version query parameters.
success = rest.AddQueryParam("timeout","20")

// The Content-Type should be "application/vnd.microsoft.servicebus.json"
success = rest.AddHeader("Content-Type","application/vnd.microsoft.servicebus.json")

Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST",sbPath.GetAsString(),sbRequestBody,sbResponseBody)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

System.DebugLog("Response Status Code = " + Str(rest.ResponseStatusCode))

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

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

System.DebugLog("Success.")