package org.jboss.errai.bus.server.websocket.jsr356.weld.session;
import org.jboss.errai.bus.server.websocket.jsr356.weld.SyncBeanStore;
import org.jboss.weld.context.bound.BoundSessionContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.naming.OperationNotSupportedException;
import javax.servlet.http.HttpSession;
/**
* Adapter for {@link javax.enterprise.context.SessionScoped}
*
* @author Michel Werren
*/
public class WeldSessionScopeAdapter implements SessionScopeAdapter {
private static final String BEAN_STORE_SESSION_ATTR_NAME = "erraiBeanStore";
private static final Logger LOGGER = LoggerFactory.getLogger(WeldSessionScopeAdapter.class.getName());
private static final ThreadLocal<SyncBeanStore> CURRENT_BEAN_STORE = new ThreadLocal<SyncBeanStore>();
private static WeldSessionScopeAdapter instance;
private final BoundSessionContext sessionContext;
private WeldSessionScopeAdapter(BoundSessionContext sessionContext) {
this.sessionContext = sessionContext;
}
public static WeldSessionScopeAdapter getInstance() {
if (instance == null) {
throw new IllegalStateException("Adapter not initialized!");
}
return instance;
}
public static void init(BoundSessionContext context) {
if (instance == null) {
instance = new WeldSessionScopeAdapter(context);
}
}
@Override
public void activateContext(HttpSession httpSession) {
if (!sessionContext.isActive()) {
final SyncBeanStore beanStore = getOrCreateBeanStore(httpSession);
if (sessionContext.associate(beanStore)) {
CURRENT_BEAN_STORE.set(beanStore);
sessionContext.activate();
}
else {
LOGGER.error("could not associate session context for session: {}", httpSession.getId());
}
}
}
/**
* Extract the existing
* {@link org.jboss.errai.bus.server.websocket.jsr356.weld.SyncBeanStore} from
* the {@link javax.servlet.http.HttpSession}. If no exists, then a new one
* will be created.
*
* @param httpSession
* @return
*/
private SyncBeanStore getOrCreateBeanStore(HttpSession httpSession) {
final Object beanStore = httpSession.getAttribute(BEAN_STORE_SESSION_ATTR_NAME);
if (beanStore != null) {
return (SyncBeanStore) beanStore;
}
else {
final SyncBeanStore newBeanStore = new SyncBeanStore();
httpSession.setAttribute(BEAN_STORE_SESSION_ATTR_NAME, newBeanStore);
return newBeanStore;
}
}
@Override
public void activateContext() {
throw new RuntimeException(new OperationNotSupportedException("session scope must be referenced with http session"));
}
/**
* used for relation to {@link org.jboss.weld.context.ConversationContext}
* beans
*
* @return session bean store of current Thread
*/
public static SyncBeanStore getCurrentBeanStore() {
return CURRENT_BEAN_STORE.get();
}
@Override
public void invalidateContext() {
sessionContext.invalidate();
deactivateContext();
}
@Override
public void deactivateContext() {
sessionContext.deactivate();
sessionContext.dissociate(getCurrentBeanStore());
CURRENT_BEAN_STORE.remove();
}
}