(Java) Azure Service Bus - Send Message to Topic

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

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // 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.
    CkRest rest = new CkRest();
    boolean bAutoReconnect = true;
    boolean success = rest.Connect("<yournamespace>.servicebus.windows.net",443,true,bAutoReconnect);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    // ----------------------------------------------------------------------------------------------
    // 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.
    CkStringBuilder sbToken = new CkStringBuilder();
    sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8");

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

    // The HTTP request body contains the content of the message sent to the topic.
    CkStringBuilder sbRequestBody = new CkStringBuilder();
    sbRequestBody.Append("Hello, I'm a gila monster!");

    // Build the path..
    CkStringBuilder sbPath = new CkStringBuilder();
    sbPath.Append("/");
    sbPath.Append(topicName);
    sbPath.Append("/messages");

    // Add timeout and api-version query parameters.
    rest.AddQueryParam("timeout","20");
    rest.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..
    CkJsonObject json = new CkJsonObject();
    json.AppendInt("TimeToLive",3600);
    json.AppendString("Label","A123");
    rest.AddHeader("BrokerProperties",json.emit());

    // To add custom properties, such as "Priority" and "Color"
    rest.AddHeader("Priority","High");
    rest.AddHeader("Color","pink");

    CkStringBuilder sbResponseBody = new CkStringBuilder();
    success = rest.FullRequestSb("POST",sbPath.getAsString(),sbRequestBody,sbResponseBody);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    System.out.println("Response Status Code = " + rest.get_ResponseStatusCode());

    // Check for a success response.
    if (rest.get_ResponseStatusCode() != 201) {
        System.out.println(rest.lastRequestStartLine());
        System.out.println(rest.lastRequestHeader());
        System.out.println(sbResponseBody.getAsString());
        System.out.println("Failed.");
        return;
        }

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

    System.out.println("Success.");
  }
}