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

Shows how to send a batch of messages to a service bus queue or topic.
Chilkat Visual FoxPro Downloads

Visual FoxPro
LOCAL lnSuccess
LOCAL loRest
LOCAL lnBAutoReconnect
LOCAL loSbToken
LOCAL lcTopicOrQueueName
LOCAL loJson
LOCAL loJsonA
LOCAL loSbRequestBody
LOCAL loSbPath
LOCAL loSbResponseBody

lnSuccess = 0

* 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('Chilkat.Rest')
lnBAutoReconnect = 1
lnSuccess = loRest.Connect("<yournamespace>.servicebus.windows.net",443,1,lnBAutoReconnect)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    CANCEL
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('Chilkat.StringBuilder')
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('Chilkat.JsonObject')
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 = 0
? 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('Chilkat.StringBuilder')
loJsonA.EmitCompact = 1
loJsonA.EmitSb(loSbRequestBody)
RELEASE loJsonA

* Build the path..
loSbPath = CreateObject('Chilkat.StringBuilder')
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('Chilkat.StringBuilder')
lnSuccess = loRest.FullRequestSb("POST",loSbPath.GetAsString(),loSbRequestBody,loSbResponseBody)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loSbToken
    RELEASE loJson
    RELEASE loSbRequestBody
    RELEASE loSbPath
    RELEASE loSbResponseBody
    CANCEL
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
    CANCEL
ENDIF

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

? "Success."

RELEASE loRest
RELEASE loSbToken
RELEASE loJson
RELEASE loSbRequestBody
RELEASE loSbPath
RELEASE loSbResponseBody