java - Passing dynamic parameters to an annotation?

Question

I am using the following annotation:

@ActivationConfigProperty(
    propertyName = "connectionParameters", 
    propertyValue = "host=127.0.0.1;port=5445,host=127.0.0.1;port=6600"),
public class TestMDB implements MessageDrivenBean, MessageListener

I would like to pull each of these IP addresses and ports and store them in a file jmsendpoints.properties... then load them dynamically. Something like this:

@ActivationConfigProperty(
    propertyName = "connectionParameters", 
    propertyValue = jmsEndpointsProperties.getConnectionParameters()),
public class TestMDB implements MessageDrivenBean, MessageListener

Is there a way to do that?

Answer 1

No. The annotation processor (the annotation-based framework you're using) needs to implement an approach to handling placeholders.

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As an example, a similar technique is implemented in Spring

@Value("#{systemProperties.dbName}")

Here Spring implements an approach to parsing that particular syntax, which in this case translates to something similar to System.getProperty("dbName");