(Lianja) 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.

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// 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.
loRest = createobject("CkRest")
llBAutoReconnect = .T.
llSuccess = loRest.Connect("<yournamespace>.servicebus.windows.net",443,.T.,llBAutoReconnect)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

// ----------------------------------------------------------------------------------------------
// 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.
loSbToken = createobject("CkStringBuilder")
loSbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8")

// Tell the REST object to use the Azure Shared Access Signature for authorization.
loSbToken.Prepend("SharedAccessSignature ")
loRest.AddHeader("Authorization",loSbToken.GetAsString())

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

// Send to a topic (or queue) named "gilaMonster";
lcTopicOrQueueName = "gilaMonster"

// The HTTP request body contains JSON that contains multiple messages.
loJson = createobject("CkJsonObject")
loJson.I = 0
loJson.UpdateString("messages[i].Body","This is the first message")
loJson.UpdateString("messages[i].BrokerProperties.Label","M1")
loJson.UpdateString("messages[i].BrokerProperties.TimeToLiveTimeSpan","0.00:00:40")

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

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

loJsonA = loJson.ArrayOf("messages")
loJsonA.EmitCompact = .F.
? loJsonA.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"
// 	    }
// 	  }
// 	]

loSbRequestBody = createobject("CkStringBuilder")
loJsonA.EmitCompact = .T.
loJsonA.EmitSb(loSbRequestBody)
release loJsonA

// Build the path..
loSbPath = createobject("CkStringBuilder")
loSbPath.Append("/")
loSbPath.Append(lcTopicOrQueueName)
loSbPath.Append("/messages")

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

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

loSbResponseBody = createobject("CkStringBuilder")
llSuccess = loRest.FullRequestSb("POST",loSbPath.GetAsString(),loSbRequestBody,loSbResponseBody)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    release loSbToken
    release loJson
    release loSbRequestBody
    release loSbPath
    release loSbResponseBody
    return
endif

? "Response Status Code = " + str(loRest.ResponseStatusCode)

// Check for a success response.
if (loRest.ResponseStatusCode <> 201) then
    ? loRest.LastRequestStartLine
    ? loRest.LastRequestHeader
    ? loSbResponseBody.GetAsString()
    ? "Failed."
    release loRest
    release loSbToken
    release loJson
    release loSbRequestBody
    release loSbPath
    release loSbResponseBody
    return
endif

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

? "Success."


release loRest
release loSbToken
release loJson
release loSbRequestBody
release loSbPath
release loSbResponseBody