removing old unused CdmVaadinConversationalServlet

diff --git a/src/main/java/eu/etaxonomy/cdm/vaadin/servlet/CdmVaadinConversationalServlet.java b/src/main/java/eu/etaxonomy/cdm/vaadin/servlet/CdmVaadinConversationalServlet.java
deleted file mode 100644 (file)
index 7122b3f..0000000
--- a/src/main/java/eu/etaxonomy/cdm/vaadin/servlet/CdmVaadinConversationalServlet.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * Copyright (C) 2015 EDIT
- * European Distributed Institute of Taxonomy
- * http://www.e-taxonomy.eu
- *
- * The contents of this file are subject to the Mozilla Public License Version 1.1
- * See LICENSE.TXT at the top of this package for the full license terms.
- */
-
-package eu.etaxonomy.cdm.vaadin.servlet;
-
-import java.io.IOException;
-
-import javax.servlet.ServletException;
-
-import org.apache.log4j.Logger;
-
-import com.vaadin.server.ServiceException;
-import com.vaadin.server.SessionDestroyEvent;
-import com.vaadin.server.SessionDestroyListener;
-import com.vaadin.server.SessionInitEvent;
-import com.vaadin.server.SessionInitListener;
-import com.vaadin.server.VaadinSession;
-import com.vaadin.spring.server.SpringVaadinServlet;
-
-import eu.etaxonomy.cdm.api.conversation.ConversationHolder;
-import eu.etaxonomy.cdm.vaadin.util.CdmSpringContextHelper;
-import eu.etaxonomy.cdm.vaadin.util.DistributionEditorUtil;
-
-
-/**
- * This class is part of the strategy to solve the lazy loading problem
- * and in more general to manage sessions properly.
- * <p>
- * Conversational Sessions essentially involve linking any UI which requires
- * long running sessions to a {@link CdmVaadinConversationalServlet}.
- * The servlet creates an instance of the ConversationHolder when a VaadinSession
- * is initialized and binds it on every service call, ensuring that a single
- * hibernate session is attached to a corresponding vaadin session.
- * <b>NOTE</b>: One major issue with this strategy is the bug (#4528) which
- * flushes the entire session even if a save / saveOrUpdate call is made on a
- * single CDM entity. This implies that this strategy is safe to use only in
- * 'session-save' UIs and not 'auto-save' UIs.
- *
- * @author c.mathew
- *
- */
-public class CdmVaadinConversationalServlet extends SpringVaadinServlet implements SessionInitListener, SessionDestroyListener {
-
-       private static final Logger logger = Logger.getLogger(CdmVaadinConversationalServlet.class);
-
-       private static final long serialVersionUID = -2973231251266766766L;
-
-       private ConversationHolder conversation;
-
-       @Override
-       protected void servletInitialized() throws ServletException {
-               super.servletInitialized();
-               getService().addSessionInitListener(this);
-               getService().addSessionDestroyListener(this);
-       }
-
-       @Override
-       public void sessionInit(SessionInitEvent event)
-                       throws ServiceException {
-               conversation = (ConversationHolder) CdmSpringContextHelper.getCurrent().getBean("conversationHolder");
-               conversation.bind();
-               VaadinSession.getCurrent().setAttribute(DistributionEditorUtil.SATTR_CONVERSATION, conversation);
-       }
-
-       @Override
-       public void sessionDestroy(SessionDestroyEvent event) {
-               conversation.close();
-       }
-
-       @Override
-       protected void service(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws ServletException, IOException {
-               if(conversation != null) {
-                       logger.info("Servlet Service call - Binding Vaadin Session Conversation : " + conversation);
-                       conversation.bind();
-               }
-
-               super.service(request, response);
-       }
-
-
-}