Resolved issue [#MOCCA-745] (Two simultaneous requests within the same session cause failure in both requests).

git-svn-id: https://joinup.ec.europa.eu/svn/mocca/trunk@790 8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4

6 files changed, 172 insertions, 10 deletions

diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/SessionListener.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/SessionListener.java
index e7f05862..58e9c861 100644
--- a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/SessionListener.java
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/SessionListener.java
@@ -23,6 +23,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import at.gv.egiz.bku.binding.BindingProcessorManager;
+import at.gv.egiz.bku.binding.Id;
 import at.gv.egiz.bku.binding.IdFactory;
 
 /**
@@ -36,12 +37,20 @@ public class SessionListener implements HttpSessionListener {
   @Override
   public void sessionCreated(HttpSessionEvent event) {
     log.info("Session {} created.", event.getSession().getId());
+    event.getSession().setAttribute(TransactionId.TRANSACTION_INDEX, new TransactionId());
   }
 
   @Override
   public void sessionDestroyed(HttpSessionEvent event) {
     BindingProcessorManager manager = (BindingProcessorManager) event.getSession().getServletContext().getAttribute("bindingProcessorManager");
-    manager.removeBindingProcessor(IdFactory.getInstance().createId(event.getSession().getId()));
+    TransactionId tidx = (TransactionId) event.getSession().getAttribute(TransactionId.TRANSACTION_INDEX);
+    if (tidx != null) {
+      IdFactory idFactory = IdFactory.getInstance();
+      for (int i = 0; i <= tidx.get(); i++) {
+        Id id = idFactory.createId(event.getSession().getId() + "-" + i);
+        manager.removeBindingProcessor(id);
+      }
+    }
     log.info("Session {} destroyed.", event.getSession().getId());
   }
 
diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionId.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionId.java
new file mode 100644
index 00000000..329db1bb
--- /dev/null
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionId.java
@@ -0,0 +1,38 @@
+/*
+* Copyright 2009 Federal Chancellery Austria and
+* Graz University of Technology
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package at.gv.egiz.bku.online.webapp;
+
+import java.io.Serializable;
+
+public class TransactionId implements Serializable {
+
+  private static final long serialVersionUID = 1L;
+
+  public static final String TRANSACTION_INDEX = "tidx";
+  
+  private int index = 0;
+  
+  public synchronized int next() {
+    return ++index;
+  }
+  
+  public synchronized int get() {
+    return index;
+  }
+  
+}
diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/RequestIdFilter.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java
index 210f482f..3ae41707 100644
--- a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/RequestIdFilter.java
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java
@@ -9,6 +9,7 @@ import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;
 import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;
 
 import org.slf4j.MDC;
@@ -19,7 +20,7 @@ import at.gv.egiz.bku.binding.IdFactory;
 /**
  * Servlet Filter implementation class BindingProcessorFilter
  */
-public class RequestIdFilter implements Filter {
+public class TransactionIdFilter implements Filter {
   
   /**
    * @see Filter#destroy()
@@ -35,9 +36,28 @@ public class RequestIdFilter implements Filter {
 
     if (request instanceof HttpServletRequest) {
       HttpSession session = ((HttpServletRequest) request).getSession();
-      Id id = IdFactory.getInstance().createId(session.getId());
+      
+      String tidx = null;
+      // We expect the transaction index parameter to appear in GET requests only
+      if ("GET".equals(((HttpServletRequest) request).getMethod())) {
+        tidx = request.getParameter("tidx");
+      }
+
+      if (tidx == null) {
+        TransactionId transactionIndex = (TransactionId) session
+            .getAttribute(TransactionId.TRANSACTION_INDEX);
+        if (transactionIndex != null) {
+          tidx = Integer.toString(transactionIndex.next());
+        } else {
+          tidx = "0";
+        }
+      }
+      
+      Id id = IdFactory.getInstance().createId(session.getId() + "-" + tidx);
       MDC.put("id", id.toString());
       request.setAttribute("id", id);
+      
+      response = new TransactionIdResponseWrapper((HttpServletResponse) response, session.getId(), tidx);
     }
 
     // pass the request along the filter chain
@@ -54,5 +74,5 @@ public class RequestIdFilter implements Filter {
    */
   public void init(FilterConfig fConfig) throws ServletException {
   }
-
-}
+  
+} 
diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdResponseWrapper.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdResponseWrapper.java
new file mode 100644
index 00000000..c7bbf85c
--- /dev/null
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdResponseWrapper.java
@@ -0,0 +1,98 @@
+/*
+* Copyright 2009 Federal Chancellery Austria and
+* Graz University of Technology
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/**
+ * 
+ */
+package at.gv.egiz.bku.online.webapp;
+
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+
+public class TransactionIdResponseWrapper extends HttpServletResponseWrapper {
+  
+  private String sessionId;
+  
+  private String tidx;
+
+  public TransactionIdResponseWrapper(HttpServletResponse response, String sessionId, String tidx) {
+    super(response);
+    this.sessionId = sessionId;
+    this.tidx = tidx;
+  }
+
+  /* (non-Javadoc)
+   * @see javax.servlet.http.HttpServletResponseWrapper#encodeRedirectURL(java.lang.String)
+   */
+  @Override
+  public String encodeRedirectURL(String url) {
+    // ensure jsessionid and tidx parameters
+    String encodedUrl = super.encodeRedirectUrl(url);
+    int i = encodedUrl.indexOf('?');
+    StringBuilder u = new StringBuilder();
+    if (i > 0) {
+      u.append(encodedUrl.substring(0, i));
+    } else {
+      u.append(encodedUrl);
+    }
+    if (!encodedUrl.contains(";jsessionid=")) {
+      u.append(";jsessionid=");
+      u.append(sessionId);
+    }
+    if (i < 0) {
+      u.append('?');
+    } else if (i < encodedUrl.length() - 1) {
+      u.append(encodedUrl.substring(i));
+      u.append('&');
+    }
+    u.append("tidx=");
+    u.append(tidx);
+    
+    return u.toString();
+  }
+
+  /* (non-Javadoc)
+   * @see javax.servlet.http.HttpServletResponseWrapper#encodeURL(java.lang.String)
+   */
+  @Override
+  public String encodeURL(String url) {
+    // ensure tidx parameter
+    String encodedUrl = super.encodeUrl(url);
+    if (url.endsWith("?wsdl")) {
+      // don't add parameters to ?wsdl URLs
+      return encodedUrl;
+    }
+    int i = encodedUrl.indexOf('?');
+    StringBuilder u = new StringBuilder();
+    if (i > 0) {
+      u.append(encodedUrl.substring(0, i));
+    } else {
+      u.append(encodedUrl);
+    }
+    if (i < 0) {
+      u.append('?');
+    } else if (i < encodedUrl.length() - 1) {
+      u.append(encodedUrl.substring(i));
+      u.append('&');
+    }
+    u.append("tidx=");
+    u.append(tidx);
+    
+    return u.toString();
+  }
+  
+}
\ No newline at end of file
diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/WebRequestHandler.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/WebRequestHandler.java
index 08b50699..0f432a10 100644
--- a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/WebRequestHandler.java
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/WebRequestHandler.java
@@ -121,10 +121,7 @@ public class WebRequestHandler extends HttpServlet {
     bindingProcessorManager.process(id, bindingProcessor);
   
     log.debug("Sending redirect to user interface.");
-    // TODO: appending the jsessionid here breaks the separation of request
-    // handling and request state tracking done in the servlet filter, but 
-    // the servlet filter does not allow us to modify the redirect
-    resp.sendRedirect("ui;jsessionid=" + id.toString());
+    resp.sendRedirect(resp.encodeRedirectURL("ui"));
       
   }
 
diff --git a/BKUOnline/src/main/webapp/WEB-INF/web.xml b/BKUOnline/src/main/webapp/WEB-INF/web.xml
index 3a318844..bcce9b34 100644
--- a/BKUOnline/src/main/webapp/WEB-INF/web.xml
+++ b/BKUOnline/src/main/webapp/WEB-INF/web.xml
@@ -153,7 +153,7 @@
 	 -->
 	<filter>
 		<filter-name>RequestIdFilter</filter-name>
-		<filter-class>at.gv.egiz.bku.online.webapp.RequestIdFilter</filter-class>
+		<filter-class>at.gv.egiz.bku.online.webapp.TransactionIdFilter</filter-class>
 	</filter>
 	<filter-mapping>
 		<filter-name>RequestIdFilter</filter-name>