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Chapter 24. Scheduled Messages
Scheduled messages differ from normal messages in that they will not be delivered until a specified time in the future.
To do this, a special property is set on the message before sending it.
24.1. 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.
TextMessage message =
session.createTextMessage("This is a scheduled 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.
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