AWebSession.java

package ilarkesto.webapp;

import ilarkesto.base.time.DateAndTime;
import ilarkesto.base.time.TimePeriod;
import ilarkesto.core.logging.Log;
import ilarkesto.di.Context;
import ilarkesto.gwt.server.AGwtConversation;

import java.util.HashSet;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;

public abstract class AWebSession {

	private static final Log LOG = Log.get(AWebSession.class);
	private static final TimePeriod DEFAULT_TIMEOUT = TimePeriod.minutes(30);

	private Context context;
	private String userAgent;
	private boolean shitBrowser;
	private String initialRemoteHost;
	private boolean sessionInvalidated;
	private DateAndTime lastTouched;
	private Set<AGwtConversation> gwtConversations = new HashSet<AGwtConversation>();
	private int lastGwtConversationNumber = 0;

	public AWebSession(Context parentContext, HttpServletRequest initialRequest) {
		this.initialRemoteHost = initialRequest == null ? "localhost" : initialRequest.getRemoteHost();

		context = parentContext.createSubContext(toString());
		context.addBeanProvider(this);

		userAgent = initialRequest == null ? "unknown" : Servlet.getUserAgent(initialRequest);
		shitBrowser = userAgent != null && userAgent.contains("MSIE 6");

		touch();
	}

	public synchronized AGwtConversation getGwtConversation(int conversationNumber) {
		if (conversationNumber == -1) {
			AGwtConversation conversation = createGwtConversation();
			gwtConversations.add(conversation);
			return conversation;
		}
		for (AGwtConversation conversation : gwtConversations) {
			if (conversation.getNumber() == conversationNumber) {
				conversation.touch();
				return conversation;
			}
		}
		throw new RuntimeException("GwtConversation does not exist: " + conversationNumber);
	}

	public AGwtConversation createGwtConversation() {
		return null;
	}

	public synchronized void destroyGwtConversation(AGwtConversation conversation) {
		conversation.invalidate();
		gwtConversations.remove(conversation);
	}

	public Set<AGwtConversation> getGwtConversations() {
		return gwtConversations;
	}

	// --- ---

	public int nextGwtConversationNumber() {
		lastGwtConversationNumber++;
		return lastGwtConversationNumber;
	}

	public final String getInitialRemoteHost() {
		return initialRemoteHost;
	}

	final void touch() {
		lastTouched = DateAndTime.now();
	}

	protected TimePeriod getTimeout() {
		return DEFAULT_TIMEOUT;
	}

	final boolean isTimeouted() {
		return lastTouched.getPeriodToNow().isGreaterThen(getTimeout());
	}

	public final DateAndTime getLastTouched() {
		return lastTouched;
	}

	public final String getUserAgent() {
		return userAgent;
	}

	public final boolean isShitBrowser() {
		return shitBrowser;
	}

	public final void setShitBrowser(boolean value) {
		this.shitBrowser = value;
	}

	public final Context getContext() {
		return context;
	}

	public final boolean isSessionInvalidated() {
		return sessionInvalidated;
	}

	protected void onInvalidate() {
		for (AGwtConversation conversation : gwtConversations) {
			conversation.invalidate();
		}
		gwtConversations = new HashSet<AGwtConversation>();
	}

	public final void invalidate() {
		LOG.info("Invalidating session:", this);
		sessionInvalidated = true;
		onInvalidate();
	}

	final void destroy() {
		if (!sessionInvalidated) {
			invalidate();
		}
		if (context != null) {
			context.destroy();
			context = null;
		}
	}

	@Override
	public String toString() {
		return "session:" + initialRemoteHost;
	}

}