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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Rest;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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.
        Rest rest = new Rest();
        boolean bAutoReconnect = true;
        try {
            rest.connect("<yournamespace>.servicebus.windows.net", 443, true, bAutoReconnect);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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.
        StringBuilder sbToken = new StringBuilder();
        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..
        StringBuilder sbPath = new StringBuilder();
        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.
        StringBuilder sbResponseBody = new StringBuilder();
        try {
            rest.fullRequestNoBodySb("DELETE", sbPath.getAsString(), sbResponseBody);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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

        // Check for a success response.
        if (rest.getResponseStatusCode() != 200) {
            System.out.println(rest.getLastRequestStartLine());
            System.out.println(rest.getLastRequestHeader());
            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.");
    }
}