Xbase++

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. Xbase++

LOCAL nSuccess
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL oSbToken
LOCAL cTopicOrQueueName
LOCAL oJson
LOCAL oJsonA
LOCAL oSbRequestBody
LOCAL oSbPath
LOCAL oSbResponseBody

nSuccess := 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.
oRest := CreateObject("Chilkat.Rest")
nBAutoReconnect := 1
nSuccess := oRest:Connect("<yournamespace>.servicebus.windows.net", 443, 1, nBAutoReconnect)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    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.
oSbToken := CreateObject("Chilkat.StringBuilder")
oSbToken:LoadFile("qa_data/tokens/serviceBusSas.txt", "utf-8")

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

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

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

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

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

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

oJsonA := oJson:ArrayOf("messages")
oJsonA:EmitCompact := 0
? oJsonA: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"
//  	    }
//  	  }
//  	]

oSbRequestBody := CreateObject("Chilkat.StringBuilder")
oJsonA:EmitCompact := 1
oJsonA:EmitSb(oSbRequestBody)
oJsonA:destroy()

//  Build the path..
oSbPath := CreateObject("Chilkat.StringBuilder")
oSbPath:Append("/")
oSbPath:Append(cTopicOrQueueName)
oSbPath:Append("/messages")

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

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

oSbResponseBody := CreateObject("Chilkat.StringBuilder")
nSuccess := oRest:FullRequestSb("POST", oSbPath:GetAsString(), oSbRequestBody, oSbResponseBody)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    oSbToken:destroy()
    oJson:destroy()
    oSbRequestBody:destroy()
    oSbPath:destroy()
    oSbResponseBody:destroy()
    RETURN
ENDIF

? "Response Status Code = " + Str(oRest:ResponseStatusCode)

//  Check for a success response.
IF (oRest:ResponseStatusCode != 201)
    ? oRest:LastRequestStartLine
    ? oRest:LastRequestHeader
    ? oSbResponseBody:GetAsString()
    ? "Failed."
    oRest:destroy()
    oSbToken:destroy()
    oJson:destroy()
    oSbRequestBody:destroy()
    oSbPath:destroy()
    oSbResponseBody:destroy()
    RETURN
ENDIF

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

? "Success."

oRest:destroy()
oSbToken:destroy()
oJson:destroy()
oSbRequestBody:destroy()
oSbPath:destroy()
oSbResponseBody:destroy()