Xbase++

Azure Service Bus - Send Message to Topic

See more Azure Service Bus Examples

Example code showing how to send a message to an Azure Service Bus Topic. Xbase++

LOCAL nSuccess
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL oSbToken
LOCAL cTopicName
LOCAL oSbRequestBody
LOCAL oSbPath
LOCAL oJson
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())

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

//  The code for sending to a topic is identical to the code sending to a queue.
//  The only difference is that a topic name (or topic path) is used instead of queue name/path.

//  Send to a topic named "gilaMonster";
cTopicName := "gilaMonster"

//  The HTTP request body contains the content of the message sent to the topic.
oSbRequestBody := CreateObject("Chilkat.StringBuilder")
oSbRequestBody:Append("Hello, I'm a gila monster!")

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

//  Add timeout and api-version query parameters.
oRest:AddQueryParam("timeout", "20")
oRest: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..
oJson := CreateObject("Chilkat.JsonObject")
oJson:AppendInt("TimeToLive", 3600)
oJson:AppendString("Label", "A123")
oRest:AddHeader("BrokerProperties", oJson:Emit())

//  To add custom properties, such as "Priority" and "Color"
oRest:AddHeader("Priority", "High")
oRest:AddHeader("Color", "pink")

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

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

? "Success."

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