[jboss-user] [EJB3] - Re: @Server, xmbean and attribute persistence?

[John Franey]

John Franey [http://community.jboss.org/people/jjfraney] created the discussion

"Re: @Server, xmbean and attribute persistence?"

To view the discussion, visit: http://community.jboss.org/message/571690#571690

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I did this to resolve my requirement:

Implement an interceptor on my service.  It uses the AttributePersistenceService directly to save attributes.  Implement the 'start' lifecycle method to load attributes from the AttributePersistenceService.


{code}
 @Depends("jboss:service=AttributePersistenceService")
 private AttributePersistenceServiceMBean attributePersistenceService;
 
@AroundInvoke
public Object intercept(InvocationContext context) throws Exception {
 
Object result = context.proceed();
 
if(context.getMethod().getName().startsWith("set")) {
saveAttributes();
}
return result;
}
 
public void start() throws Exception {
loadAttributes();
 
}
 
private void saveAttributes() throws Exception {
AttributePersistenceManager manager = getAttributePersistenceManager();
if(manager != null) {
AttributeList attrs = new AttributeList();
attrs.add(new Attribute("syncInterval", syncInterval));
LOGGER.debug("saving attributes: {}", attrs);
manager.store(ATTRIBUTE_KEY, attrs);
}
}
 
private void loadAttributes() throws Exception {
AttributePersistenceManager manager = getAttributePersistenceManager();
if(manager != null) {
AttributeList attrs = manager.load(ATTRIBUTE_KEY);
for(Attribute attribute: attrs.asList()) {
if("syncInterval".equals(attribute.getName())) {
this.syncInterval = ((Long)attribute.getValue()).longValue();
}
}
}
}
 
private AttributePersistenceManager getAttributePersistenceManager() {
AttributePersistenceManager result = null;
 
if(attributePersistenceService != null) {
result =  attributePersistenceService.apmCreate();
}
return result;
}
 
 @AroundInvoke
 public Object intercept(InvocationContext context) throws Exception {
 
 Object result = context.proceed();
 
 if(context.getMethod().getName().startsWith("set")) {
 saveAttributes();
 }
 return result;
 }

 public void start() throws Exception {
 loadAttributes();
 
 }
 
 private void saveAttributes() throws Exception {
 AttributePersistenceManager manager = getAttributePersistenceManager();
 if(manager != null) {
 AttributeList attrs = new AttributeList();
 attrs.add(new Attribute("syncInterval", syncInterval));
 LOGGER.debug("saving attributes: {}", attrs);
 manager.store(ATTRIBUTE_KEY, attrs);
 }
 }

 private void loadAttributes() throws Exception {
 AttributePersistenceManager manager = getAttributePersistenceManager();
 if(manager != null) {
 AttributeList attrs = manager.load(ATTRIBUTE_KEY);
 for(Attribute attribute: attrs.asList()) {
 if("syncInterval".equals(attribute.getName())) {
 this.syncInterval = ((Long)attribute.getValue()).longValue();
 }
 }
 }
 }
 
 private AttributePersistenceManager getAttributePersistenceManager() {
 AttributePersistenceManager result = null;

 if(attributePersistenceService != null) {
 result =  attributePersistenceService.apmCreate();
 }
 return result;
 }
 
{code}
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