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(Java) Azure Service Bus - Receive and Delete Message from Subscription

See more Azure Service Bus Examples

Shows how to receive and delete a message from an Azure service bus topic subscription.

Chilkat Java Downloads

Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris

Java Libs for Android

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());

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

    // Receive a message from the subscription "feedings" in the topic "gilaMonster"
    String topicName = "gilaMonster";
    String subscriptionName = "feedings";

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

    // Add a timeout parameter.
    rest.AddQueryParam("timeout","20");

    // Use the DELETE HTTP verb to read the message at the head of the queue and remove it.
    CkStringBuilder sbResponseBody = new CkStringBuilder();
    success = rest.FullRequestNoBodySb("DELETE",sbPath.getAsString(),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() != 200) {
        System.out.println(rest.lastRequestStartLine());
        System.out.println(rest.lastRequestHeader());
        System.out.println(sbResponseBody.getAsString());
        System.out.println("Failed.");
        return;
        }

    // If successful, the message is the contents of the response body.
    String message = sbResponseBody.getAsString();
    System.out.println("Received message: " + message);

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

 

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