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diff --git a/org.argeo.security.core/src/main/java/org/argeo/security/jcr/SecureThreadBoundSession.java b/org.argeo.security.core/src/main/java/org/argeo/security/jcr/SecureThreadBoundSession.java
new file mode 100644
index 000000000..b39877420
--- /dev/null
+++ b/org.argeo.security.core/src/main/java/org/argeo/security/jcr/SecureThreadBoundSession.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * 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 org.argeo.security.jcr;
+
+import javax.jcr.Session;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.jcr.spring.ThreadBoundSession;
+import org.springframework.security.Authentication;
+import org.springframework.security.context.SecurityContextHolder;
+
+/**
+ * Thread bounded JCR session factory which checks authentication and is
+ * autoconfigured in Spring.
+ */
+public class SecureThreadBoundSession extends ThreadBoundSession {
+	private final static Log log = LogFactory
+			.getLog(SecureThreadBoundSession.class);
+
+	@Override
+	protected Session preCall(Session session) {
+		Authentication authentication = SecurityContextHolder.getContext()
+				.getAuthentication();
+		if (authentication != null) {
+			String userID = session.getUserID();
+			String currentUserName = authentication.getName();
+			if (currentUserName != null) {
+				if (!userID.equals(currentUserName)) {
+					log.warn("Current session has user ID " + userID
+							+ " while logged is user is " + currentUserName
+							+ "(authentication=" + authentication + ")"
+							+ ". Re-login.");
+					// TODO throw an exception
+					return login();
+				}
+			}
+		}
+		return super.preCall(session);
+	}
+
+}