From af24a20257f4958ef5335d471a7fe2c93f475a35 Mon Sep 17 00:00:00 2001
From: mcentner <mcentner@8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4>
Date: Wed, 28 Jul 2010 09:05:04 +0000
Subject: 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
---
 .../bku/online/webapp/TransactionIdFilter.java     | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java

(limited to 'BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java')

diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java
new file mode 100644
index 00000000..3ae41707
--- /dev/null
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/TransactionIdFilter.java
@@ -0,0 +1,78 @@
+package at.gv.egiz.bku.online.webapp;
+
+import java.io.IOException;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+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;
+
+import at.gv.egiz.bku.binding.Id;
+import at.gv.egiz.bku.binding.IdFactory;
+
+/**
+ * Servlet Filter implementation class BindingProcessorFilter
+ */
+public class TransactionIdFilter implements Filter {
+  
+  /**
+   * @see Filter#destroy()
+   */
+  public void destroy() {
+  }
+
+  /**
+   * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
+   */
+  public void doFilter(ServletRequest request, ServletResponse response,
+      FilterChain chain) throws IOException, ServletException {
+
+    if (request instanceof HttpServletRequest) {
+      HttpSession session = ((HttpServletRequest) request).getSession();
+      
+      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
+    try {
+      chain.doFilter(request, response);
+    } finally {
+      MDC.remove("id");
+    }
+    
+  }
+
+  /**
+   * @see Filter#init(FilterConfig)
+   */
+  public void init(FilterConfig fConfig) throws ServletException {
+  }
+  
+} 
-- 
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