SB : Sample Disable queue from administration client (Azure#18236)

Adding sample for administrator client.

sdk/servicebus/azure-messaging-servicebus/src/samples/README.md

@@ -51,6 +51,9 @@ connection string value can be obtained by:
 - [Receive messages from a specific session][ReceiveNamedSessionAsyncSample]
 - [Receive messages from the first available session][ReceiveSingleSessionAsyncSample]
 
+### Synchronous Administration Client operations
+- [Update queue properties synchronously][AdministrationClientUpdateQueueSample]
+
 ## Troubleshooting
 See [Troubleshooting][sdk_readme_troubleshooting].
 
@@ -83,5 +86,6 @@ Guidelines](https://github.com/Azure/azure-sdk-for-java/blob/master/CONTRIBUTING
 [SendScheduledMessageAndCancelAsyncSample]: https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/servicebus/azure-messaging-servicebus/src/samples/java/com/azure/messaging/servicebus/SendScheduledMessageAndCancelAsyncSample.java
 [ServiceBusProcessorSample]: https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/servicebus/azure-messaging-servicebus/src/samples/java/com/azure/messaging/servicebus/ServiceBusProcessorSample.java
 [ServiceBusSessionProcessorSample]: https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/servicebus/azure-messaging-servicebus/src/samples/java/com/azure/messaging/servicebus/ServiceBusSessionProcessorSample.java
+[AdministrationClientUpdateQueueSample]: https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/servicebus/azure-messaging-servicebus/src/samples/java/com/azure/messaging/servicebus/AdministrationClientUpdateQueueSample.java 
 
 ![Impressions](https://azure-sdk-impressions.azurewebsites.net/api/impressions/azure-sdk-for-java%2Fsdk%2Fservicebus%2Fazure-messaging-servicebus%2Fsrc%2Fsamples%2FREADME.png)

sdk/servicebus/azure-messaging-servicebus/src/samples/java/com/azure/messaging/servicebus/AdministrationClientUpdateQueueSample.java

@@ -0,0 +1,51 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package com.azure.messaging.servicebus;
+
+import com.azure.messaging.servicebus.administration.ServiceBusAdministrationClient;
+import com.azure.messaging.servicebus.administration.ServiceBusAdministrationClientBuilder;
+import com.azure.messaging.servicebus.administration.models.QueueProperties;
+
+import java.time.Duration;
+
+/**
+ * Sample example showing how to update properties of Service Bus Queue.
+ */
+public class AdministrationClientUpdateQueueSample {
+    /**
+     * Main method to show how to update properties of Service Bus Queue.
+     *
+     * @param args Unused arguments to the program.
+     */
+    public static void main(String[] args) {
+        // The connection string value can be obtained by:
+        // 1. Going to your Service Bus namespace in Azure Portal.
+        // 2. Go to "Shared access policies"
+        // 3. Copy the connection string for the "RootManageSharedAccessKey" policy.
+
+        String connectionString = "Endpoint={fully-qualified-namespace};SharedAccessKeyName={policy-name};"
+            + "SharedAccessKey={key}";
+
+        // Create a administrator client using connection string.
+        ServiceBusAdministrationClient client = new ServiceBusAdministrationClientBuilder()
+            .connectionString(connectionString)
+            .buildClient();
+
+        // "<<queue-name>>" will be the name of the Service Bus queue instance you created
+        // inside the Service Bus namespace.
+        QueueProperties properties = client.getQueue("<<queue-name>>");
+
+        System.out.printf("Before queue properties LockDuration: [%d seconds], Max Delivery count: [%d].%n",
+            properties.getLockDuration().getSeconds(), properties.getMaxDeliveryCount());
+
+        // You can update 'QueueProperties' object with properties you want to change.
+        properties.setMaxDeliveryCount(10).setLockDuration(Duration.ofSeconds(60));
+
+        QueueProperties updatedProperties = client.updateQueue(properties);
+
+        System.out.printf("After queue properties LockDuration: [%d seconds], Max Delivery count: [%d].%n",
+            updatedProperties.getLockDuration().getSeconds(), updatedProperties.getMaxDeliveryCount());
+    }
+
+}