Description: A non-durable JMS (Java Message Service) subscriber is a type of subscriber that receives messages from a JMS provider only when it is actively connected. Unlike durable subscribers, which maintain their state and can receive messages even when they are not connected, non-durable subscribers rely on an active connection to receive information. This means that if the subscriber disconnects, any messages sent during that time are lost. This model is useful in situations where real-time message reception is critical and where message persistence is not necessary. Non-durable subscribers are ideal for applications that require fast and efficient communication, such as real-time monitoring systems or instant messaging applications. In terms of implementation, non-durable subscribers are simpler and require fewer resources, making them attractive for applications that do not need the complexity of durability. However, their ephemeral nature means they should be used in contexts where message loss does not significantly impact overall system functionality.