[wildfly-dev] Accessing system properties in a subsystem

[Tom Jenkinson]

Hi,

I have a subsystem that configures itself from system properties.

For example:
<system-properties>
  <property name="RecoveryEnvironmentBean.expiryScannerClassNames"
value="com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionStatusManagerScanner
com.arjuna.ats.internal.arjuna.recovery.AtomicActionExpiryScanner"/>
</system-properties>

In earlier revisions of WFLY this worked fine. However I am now seeing that
the system property is not set until after my subsystem has started. I can
tell this as I have breakpoints on where I process the property. I can see
"MSC service thread 1-4" attempting to process the property (which is not
set). I do later see messages that suggest the system property is set but
at that the later point:

2016-12-12 17:57:48,042 TRACE
[org.jboss.as.controller.management-operation] (Controller Boot Thread)
Final response for step handler
org.jboss.as.server.operations.SystemPropertyAddHandler at 784c8c5f handling
add in address [("system-property" =>
"RecoveryEnvironmentBean.expiryScannerClassNames")] is {"outcome" =>
"success"}
2016-12-12 17:57:48,093 TRACE
[org.jboss.as.controller.management-operation] (Controller Boot Thread)
Final response for step handler
org.jboss.as.controller.ValidateModelStepHandler at 87b4493 handling
internal-model-validation in address [("system-property" =>
"RecoveryEnvironmentBean.expiryScannerClassNames")] is {"outcome" =>
"success"}

Does my subsystem need to depend on something to get the old behaviour of
being started after system properties are processed?

My subsystem is the transaction one and the service is the recovery manager.

Thanks!
Tom
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