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To set the priority at the producer level when sending messages in JMS, you can use the `setJMSPriority` method available on the JMS `Message` interface. Here's an example using `MessageProducer` in Java:

```java
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Message;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Queue;
import javax.jms.JMSContext;
import javax.jms.JMSException;
import javax.jms.ConnectionFactory;

public class JmsProducerExample {

    public static void main(String[] args) {
        // Set up JMS Connection and Session
        ConnectionFactory connectionFactory = ...; // Obtain your connection factory
        try (Connection connection = connectionFactory.createConnection()) {
            connection.start();

            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            // Create a queue
            Queue queue = session.createQueue("YourQueueName");

            // Create a message producer
            MessageProducer producer = session.createProducer(queue);

            // Create a text message
            TextMessage message = session.createTextMessage("Your message content");

            // Set the message priority
            message.setJMSPriority(7); // Set the desired priority (1-9)

            // Set other properties if needed
            // message.setStringProperty("propertyName", "propertyValue");

            // Send the message
            producer.send(message);

            // Clean up resources
            producer.close();
            session.close();
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }
}
```

In this example:

- `createTextMessage("Your message content")` creates a `TextMessage` with the specified content.
- `setJMSPriority(7)` sets the priority of the message. The priority values typically range from 0 to 9, where 0 is the lowest priority, and 9 is the highest.
- Other optional properties can be set using methods like `setStringProperty` for custom message properties.

Adjust the priority value according to your specific needs. When the producer sends the message, it will include the specified priority information. This priority information is then used by the JMS broker to determine the order in which messages are delivered to consumers.