Android™

Azure Service Bus - Delete Message

See more Azure Service Bus Examples

Deletes a message from a queue or subscription.

For more information, see https://docs.microsoft.com/en-us/rest/api/servicebus/unlock-message

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;

    //  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;
        }

    //  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 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..
    //  ----------------------------------------------------------------------------------------------

    //  To delete a message, we'll need either the SequenceNumber or MessageId.
    //  When the message was peek-locked, the SequenceNumber and MessageId of the locked message
    //  was returned in the HTTP response header named "BrokerProperties, which contained
    //  JSON such as the following:
    //  
    //  	{
    //  	  "DeliveryCount": 1,
    //  	  "EnqueuedSequenceNumber": 3000004,
    //  	  "EnqueuedTimeUtc": "Wed, 07 Dec 2016 17:42:48 GMT",
    //  	  "Label": "M3",
    //  	  "LockToken": "6eeee205-e541-4cb6-95fb-4c81da5f6858",
    //  	  "LockedUntilUtc": "Thu, 08 Dec 2016 00:57:32 GMT",
    //  	  "MessageId": "e8028116d63c43f191577f2789b1cca7",
    //  	  "SequenceNumber": 4,
    //  	  "State": "Active",
    //  	  "TimeToLive": 922337193600
    //  	}
    //  
    //  
    //  The path for unlocking a message is constructed as follows, depending on
    //  whether it is a message on a queue or subscription:
    //  
    //  (for a queue)
    //  /{queuePath}/messages/{messageId|sequenceNumber}/{lockToken}
    //  
    //  (for a subscription)
    //  /{topicPath}/subscriptions/{subscriptionName}/messages/{messageId|sequenceNumber}/{lockToken}

    //  This example will build a path to delete a message contained in a subscription.
    String topicName = "gilaMonster";
    String subscriptionName = "feedings";
    String messageId = "e8028116d63c43f191577f2789b1cca7";
    String lockToken = "6eeee205-e541-4cb6-95fb-4c81da5f6858";

    //  Build the path..
    CkStringBuilder sbPath = new CkStringBuilder();
    sbPath.Append("/{topicPath}/subscriptions/{subscriptionName}/messages/{messageId|sequenceNumber}/{lockToken}");
    int numReplaced = sbPath.Replace("{topicPath}",topicName);
    numReplaced = sbPath.Replace("{subscriptionName}",subscriptionName);
    numReplaced = sbPath.Replace("{messageId|sequenceNumber}",messageId);
    numReplaced = sbPath.Replace("{lockToken}",lockToken);

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

    //  Use the DELETE HTTP verb to delete the message.
    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 response body would be empty..
    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."
  }
}