# Scheduled Messages Scheduled messages differ from normal messages in that they won't be delivered until a specified time in the future, at the earliest. To do this, a special property is set on the message before sending it. ## Scheduled Delivery Property The property name used to identify a scheduled message is `"_HQ_SCHED_DELIVERY"` (or the constant `Message.HDR_SCHEDULED_DELIVERY_TIME`). The specified value must be a positive `long` corresponding to the time the message must be delivered (in milliseconds). An example of sending a scheduled message using the JMS API is as follows. ``` java TextMessage message = session.createTextMessage("This is a scheduled message message which will be delivered in 5 sec."); message.setLongProperty("_HQ_SCHED_DELIVERY", System.currentTimeMillis() + 5000); producer.send(message); ... // message will not be received immediately but 5 seconds later TextMessage messageReceived = (TextMessage) consumer.receive(); ``` Scheduled messages can also be sent using the core API, by setting the same property on the core message before sending. ## Example See ? for an example which shows how scheduled messages can be used with JMS.