Android™

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. Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    //  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;
    success = rest.Connect("<yournamespace>.servicebus.windows.net",443,true,bAutoReconnect);
    if (success != true) {
        Log.i(TAG, 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) {
        Log.i(TAG, rest.lastErrorText());
        return;
        }

    Log.i(TAG, "Response Status Code = " + String.valueOf(rest.get_ResponseStatusCode()));

    //  Check for a success response.
    if (rest.get_ResponseStatusCode() != 200) {
        Log.i(TAG, rest.lastRequestStartLine());
        Log.i(TAG, rest.lastRequestHeader());
        Log.i(TAG, sbResponseBody.getAsString());
        Log.i(TAG, "Failed.");
        return;
        }

    //  If successful, the message is the contents of the response body.
    String message = sbResponseBody.getAsString();
    Log.i(TAG, "Received message: " + message);

    Log.i(TAG, "Success.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}