From 808160eed731dd7c0ad2fde0c5d4c7302cb43176 Mon Sep 17 00:00:00 2001
From: Scott Battaglia <scott.battaglia@gmail.com>
Date: Tue, 26 Sep 2006 18:20:43 +0000
Subject: [PATCH] CASC-13 support for threadlocal

---
 .../client/validation/AssertionHolder.java    | 43 ++++++++++++++++
 .../filter/AssertionThreadLocalFilter.java    | 51 +++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionHolder.java
 create mode 100644 cas-client-core/src/main/java/org/jasig/cas/client/web/filter/AssertionThreadLocalFilter.java

diff --git a/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionHolder.java b/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionHolder.java
new file mode 100644
index 0000000..26f877e
--- /dev/null
+++ b/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionHolder.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2006 The JA-SIG Collaborative. All rights reserved. See license
+ * distributed with this file and available online at
+ * http://www.ja-sig.org/products/cas/overview/license/index.html
+ */
+package org.jasig.cas.client.validation;
+
+/**
+ * Static holder that places Assertion in a threadlocal.
+ *
+ * @author Scott Battaglia
+ * @version $Revision$ $Date$
+ * @since 3.0
+ */
+public class AssertionHolder {
+
+    /**
+     * ThreadLocal to hold the Assertion for Threads to access.
+     */
+    private static final ThreadLocal threadLocal = new ThreadLocal();
+
+
+    /**
+     * Retrieve the assertion from the ThreadLocal.
+     */
+    public static Assertion getAssertion() {
+        return (Assertion) threadLocal.get();
+    }
+
+    /**
+     * Add the Assertion to the ThreadLocal.
+     */
+    public static void setAssertion(final Assertion assertion) {
+        threadLocal.set(assertion);
+    }
+
+    /**
+     * Clear the ThreadLocal.
+     */
+    public static void clear() {
+        threadLocal.set(null);
+    }
+}
diff --git a/cas-client-core/src/main/java/org/jasig/cas/client/web/filter/AssertionThreadLocalFilter.java b/cas-client-core/src/main/java/org/jasig/cas/client/web/filter/AssertionThreadLocalFilter.java
new file mode 100644
index 0000000..0530ec1
--- /dev/null
+++ b/cas-client-core/src/main/java/org/jasig/cas/client/web/filter/AssertionThreadLocalFilter.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2006 The JA-SIG Collaborative. All rights reserved. See license
+ * distributed with this file and available online at
+ * http://www.ja-sig.org/products/cas/overview/license/index.html
+ */
+package org.jasig.cas.client.web.filter;
+
+import org.jasig.cas.client.validation.Assertion;
+import org.jasig.cas.client.validation.AssertionHolder;
+import org.springframework.web.util.WebUtils;
+
+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 java.io.IOException;
+
+/**
+ * Places the assertion in a ThreadLocal such that other resources can access it that do not have access to the web tier session.
+ *
+ * @author Scott Battaglia
+ * @version $Revision$ $Date$
+ * @since 3.0
+ */
+public final class AssertionThreadLocalFilter implements Filter {
+
+    public void init(final FilterConfig filterConfig) throws ServletException {
+        // nothing to do here
+    }
+
+    public void doFilter(final ServletRequest servletRequest, final ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException {
+        final HttpServletRequest request = (HttpServletRequest) servletRequest;
+        final Assertion assertion = (Assertion) WebUtils
+                .getSessionAttribute(request,
+                        AbstractCasFilter.CONST_ASSERTION);
+
+        try {
+            AssertionHolder.setAssertion(assertion);
+            filterChain.doFilter(servletRequest, servletResponse);
+        } finally {
+            AssertionHolder.clear();
+        }
+    }
+
+    public void destroy() {
+        // nothing to do
+    }
+}