package org.jboss.errai.bus.server.websocket.jsr356.channel;
import org.jboss.errai.bus.client.api.QueueSession;
import org.jboss.errai.bus.client.api.SessionEndEvent;
import org.jboss.errai.bus.client.api.SessionEndListener;
import org.jboss.errai.bus.client.api.messaging.Message;
import org.jboss.errai.bus.server.io.MessageFactory;
import org.jboss.errai.bus.server.service.ErraiService;
import org.jboss.errai.bus.server.service.ErraiServiceSingleton;
import org.jboss.errai.bus.server.servlet.websocket.WebSocketNegotiationHandler;
import org.jboss.errai.bus.server.websocket.jsr356.filter.FilterDelegate;
import org.jboss.errai.marshalling.client.api.json.EJValue;
import org.jboss.errai.marshalling.server.JSONDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpSession;
import javax.websocket.Session;
import java.io.IOException;
import java.util.List;
/**
* Handler for websocket messages for both receiving and sending. There is one
* instance for each {@link javax.websocket.Session} and each one has a relation
* to its {@link javax.servlet.http.HttpSession}.
*
* @author Michel Werren
*/
public class DefaultErraiWebSocketChannel implements ErraiWebSocketChannel {
private static final Logger LOGGER = LoggerFactory.getLogger(DefaultErraiWebSocketChannel.class.getName());
protected final Session session;
protected final ErraiService erraiService;
protected final HttpSession httpSession;
protected QueueSession queueSession = null;
public DefaultErraiWebSocketChannel(Session session, HttpSession httpSession) {
this.session = session;
this.httpSession = httpSession;
if (ErraiServiceSingleton.isInitialized()) {
erraiService = ErraiServiceSingleton.getService();
}
else {
throw new IllegalStateException("Errai Bus should be initialized at this time. Default servlet configured?");
}
}
public void doErraiMessage(final String message) {
final EJValue val = JSONDecoder.decode(message);
// this is not an active channel.
try {
if (queueSession == null) {
queueSession = WebSocketNegotiationHandler.establishNegotiation(val, this, erraiService);
if (queueSession != null) {
LOGGER.trace("Negotiation done for errai session: {} on websocket session: {}", queueSession.getSessionId(),
session.getId());
queueSession.addSessionEndListener(new SessionEndListener() {
@Override
public void onSessionEnd(SessionEndEvent event) {
if (session.isOpen()) {
LOGGER.warn("Errai queue session closed: {}", queueSession.getSessionId());
}
}
});
}
}
else {
FilterDelegate.invokeFilter(session, httpSession, message);
final List<Message> commandMessages = MessageFactory.createCommandMessage(queueSession, val);
erraiService.store(commandMessages);
}
} catch (IOException e) {
LOGGER.error("could not proceed message", e);
}
}
@Override
public boolean isConnected() {
return session.isOpen();
}
@Override
public void write(String data) throws IOException {
session.getBasicRemote().sendText(data);
}
@Override
public void onSessionClosed() {
}
}