changes to support single-sign-on (sso)

src/main/java/tomcat/request/session/model/Config.java

@@ -11,6 +11,8 @@
 /** author: Ranjith Manickam @ 5 Feb' 2020 */
 public class Config implements Serializable {
 
+    private static final long serialVersionUID = 3480402257971437776L;
+
     public static final String APPLICATION_PROPERTIES_FILE = "redis-data-cache.properties";
 
     /** Redis config type. */
@@ -77,6 +79,9 @@ public enum RedisConfigType {
     @Property(name = "session.persistent.policies", defaultValue = "DEFAULT")
     private String sessionPersistentPolicies;
 
+    @Property(name = "redis.sso.timeout", type = INTEGER, defaultValue = "0")
+    private Integer redisSSOTimeout;
+
     public Config() {
     }
 
@@ -98,7 +103,8 @@ public Config(String redisHosts,
                   String redisSentinelMaster,
                   Integer redisSessionExpiryJobInterval,
                   Integer redisSessionDataSyncJobInterval,
-                  String sessionPersistentPolicies) {
+                  String sessionPersistentPolicies,
+                  Integer redisSSOTimeout) {
         this.redisHosts = redisHosts;
         this.redisClusterEnabled = redisClusterEnabled;
         this.redisSentinelEnabled = redisSentinelEnabled;
@@ -118,6 +124,7 @@ public Config(String redisHosts,
         this.redisSessionExpiryJobInterval = redisSessionExpiryJobInterval;
         this.redisSessionDataSyncJobInterval = redisSessionDataSyncJobInterval;
         this.sessionPersistentPolicies = sessionPersistentPolicies;
+        this.redisSSOTimeout = redisSSOTimeout;
     }
 
     /** To get 'redis.hosts' value. */
@@ -215,6 +222,11 @@ public String getSessionPersistentPolicies() {
         return sessionPersistentPolicies;
     }
 
+    /** To get 'redis.sso.timeout' value */
+    public Integer getRedisSSOTimeout() {
+        return redisSSOTimeout;
+    }
+
     /** {@inheritDoc} */
     @Override
     public String toString() {
@@ -238,6 +250,7 @@ public String toString() {
                 ", redisSessionExpiryJobInterval=" + redisSessionExpiryJobInterval +
                 ", redisSessionDataSyncJobInterval=" + redisSessionDataSyncJobInterval +
                 ", sessionPersistentPolicies='" + sessionPersistentPolicies + '\'' +
+                ", redisSSOTimeout='" + redisSSOTimeout + '\'' +
                 '}';
     }
 

src/main/java/tomcat/request/session/redis/SessionManager.java

@@ -32,10 +32,11 @@ public class SessionManager extends ManagerBase implements Lifecycle {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(SessionManager.class);
 
+    private Integer ssoTimeout;
     private DataCache dataCache;
     private SerializationUtil serializer;
-    private ThreadLocal<SessionContext> sessionContext = new ThreadLocal<>();
-    private Set<SessionPolicy> sessionPolicy = EnumSet.of(SessionPolicy.DEFAULT);
+    private final ThreadLocal<SessionContext> sessionContext = new ThreadLocal<>();
+    private final Set<SessionPolicy> sessionPolicy = EnumSet.of(SessionPolicy.DEFAULT);
 
     public boolean getSaveOnChange() {
         return this.sessionPolicy.contains(SessionPolicy.SAVE_ON_CHANGE);
@@ -78,14 +79,6 @@ protected synchronized void startInternal() throws LifecycleException {
                 initializedValve = true;
                 break;
             }
-
-            if (valve instanceof SingleSignOnValve) {
-                SingleSignOnValve ssoValve = (SingleSignOnValve) valve;
-                ssoValve.setSessionManager(this);
-                ssoValve.setContext(context);
-                initializedValve = true;
-                break;
-            }
         }
 
         if (!initializedValve) {
@@ -218,6 +211,7 @@ public void unload() {
     private void initialize() {
         try {
             Config config = ConfigUtil.getConfig();
+            this.ssoTimeout = config.getRedisSSOTimeout();
             this.dataCache = new DataCacheFactory(config, getSessionTimeout(null)).getDataCache();
             this.serializer = new SerializationUtil();
 
@@ -353,6 +347,9 @@ void setSingleSignOnEntry(String ssoId, SingleSignOnEntry entry) {
         try {
             byte[] data = this.serializer.serializeSingleSignOnEntry(entry);
             this.dataCache.set(ssoId, data);
+            if (this.ssoTimeout > 0) {
+                this.dataCache.expire(ssoId, this.ssoTimeout);
+            }
         } catch (IOException ex) {
             LOGGER.error("Error occurred while serializing the single-sign-on entry..", ex);
         }

src/main/java/tomcat/request/session/redis/SingleSignOnValve.java

@@ -2,6 +2,8 @@
 
 import org.apache.catalina.Container;
 import org.apache.catalina.Context;
+import org.apache.catalina.Engine;
+import org.apache.catalina.LifecycleException;
 import org.apache.catalina.Manager;
 import org.apache.catalina.Realm;
 import org.apache.catalina.Session;
@@ -26,14 +28,27 @@ public class SingleSignOnValve extends SingleSignOn {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(SingleSignOnValve.class);
 
-    private Context context;
+    private Engine engine;
     private SessionManager manager;
 
+    /** {@inheritDoc} */
+    @Override
+    protected synchronized void startInternal() throws LifecycleException {
+        Container c;
+        for (c = this.getContainer(); c != null && !(c instanceof Engine); c = c.getParent()) {
+        }
+
+        if (c instanceof Engine) {
+            this.engine = (Engine) c;
+        }
+
+        super.startInternal();
+    }
+
     /** {@inheritDoc} */
     @Override
     public void invoke(Request request, Response response) throws BackendException {
         try {
-            this.setContext(request.getContext());
             this.setSessionManager(request.getContext().getManager());
 
             request.removeNote("org.apache.catalina.request.SSOID");
@@ -213,17 +228,12 @@ void setSessionManager(Manager manager) {
         this.manager = (SessionManager) manager;
     }
 
-    /** To set context. */
-    void setContext(Context context) {
-        this.context = context;
-    }
-
     /** To expire session. */
     private void expire(SingleSignOnSessionKey key) {
-        if (this.context == null) {
+        if (this.engine == null) {
             LOGGER.warn("singleSignOn.sessionExpire.engineNull, key: {}", key);
         } else {
-            Container host = this.context.findChild(key.getHostName());
+            Container host = this.engine.findChild(key.getHostName());
             if (host == null) {
                 LOGGER.warn("singleSignOn.sessionExpire.hostNotFound, key: {}", key);
             } else {

src/main/resources/redis-data-cache.properties

@@ -33,4 +33,7 @@ lb.sticky-session.enabled=false
 # policies - DEFAULT, SAVE_ON_CHANGE, ALWAYS_SAVE_AFTER_REQUEST
 #   1. SAVE_ON_CHANGE: every time session.setAttribute() or session.removeAttribute() is called the session will be saved.
 #   2. ALWAYS_SAVE_AFTER_REQUEST: force saving after every request, regardless of whether or not the manager has detected changes to the session.
-session.persistent.policies=DEFAULT
+session.persistent.policies=DEFAULT
+
+#- single-sign-on session timeout. (default value: 0 ms (-no expiry))
+redis.sso.timeout=0