first draft

pom.xml

@@ -194,13 +194,13 @@
 		<dependency>
 			<groupId>org.apache.tomcat</groupId>
 			<artifactId>tomcat-catalina</artifactId>
-			<version>8.5.35</version>
+			<version>8.5.41</version>
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.mongodb</groupId>
 			<artifactId>mongo-java-driver</artifactId>
-			<version>3.5.0</version>
+			<version>3.10.2</version>
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
@@ -224,8 +224,13 @@
 		<dependency>
 			<groupId>org.appng</groupId>
 			<artifactId>appng-api</artifactId>
-			<version>1.14.4</version>
+			<version>1.18.0</version>
 			<scope>provided</scope>
+		</dependency>		
+		<dependency>
+			<groupId>com.hazelcast</groupId>
+			<artifactId>hazelcast-client</artifactId>
+			<version>3.12</version>
 		</dependency>
 	</dependencies>
 </project>

src/main/java/org/appng/tomcat/session/hazelcast/HazelcastPersistentManager.java

@@ -0,0 +1,83 @@
+package org.appng.tomcat.session.hazelcast;
+
+import java.io.IOException;
+
+import org.apache.catalina.Container;
+import org.apache.catalina.LifecycleException;
+import org.apache.catalina.Session;
+import org.apache.catalina.session.PersistentManagerBase;
+import org.apache.juli.logging.Log;
+import org.appng.tomcat.session.Utils;
+
+public class HazelcastPersistentManager extends PersistentManagerBase {
+
+	private final Log log = Utils.getLog(HazelcastSessionTrackerValve.class);
+
+	private String name;
+
+	protected void destroyInternal() throws LifecycleException {
+		super.destroyInternal();
+	}
+
+	@Override
+	public void add(Session session) {
+		// do nothing, we don't want to use Map<String,Session> sessions!
+	}
+
+	@Override
+	public void remove(Session session, boolean update) {
+		// avoid super.remove
+		removeSession(session.getId());
+	}
+
+	@Override
+	public Session findSession(String id) throws IOException {
+		// do not call super, instead load the session directly from the store
+		try {
+			log.info("Manager FIND: " + id);
+			return getStore().load(id);
+		} catch (ClassNotFoundException e) {
+			throw new IOException("error loading class for session " + id, e);
+		}
+	}
+
+	@Override
+	protected String generateSessionId() {
+		String sessionId = super.generateSessionId();
+		log.info("Manager CREATED: " + sessionId);
+		return sessionId;
+	}
+
+	@Override
+	public void removeSuper(Session session) {
+		log.info("Manager REMOVE SUPER: " + session.getId());
+		super.removeSuper(session);
+	}
+
+	@Override
+	public String getName() {
+		if (this.name == null) {
+			Container container = getContext();
+
+			String contextName = container.getName();
+			if (!contextName.startsWith("/")) {
+				contextName = "/" + contextName;
+			}
+
+			String hostName = "";
+			String engineName = "";
+
+			if (container.getParent() != null) {
+				Container host = container.getParent();
+				hostName = host.getName();
+				if (host.getParent() != null) {
+					engineName = host.getParent().getName();
+				}
+			}
+
+			this.name = "/" + engineName + "/" + hostName + contextName;
+		}
+		return this.name;
+	}
+
+}

src/main/java/org/appng/tomcat/session/hazelcast/HazelcastSession.java

@@ -0,0 +1,70 @@
+package org.appng.tomcat.session.hazelcast;
+
+import java.io.IOException;
+
+import com.hazelcast.nio.ObjectDataInput;
+import com.hazelcast.nio.ObjectDataOutput;
+import com.hazelcast.nio.serialization.DataSerializable;
+
+public class HazelcastSession implements DataSerializable {
+	private String id;
+	private String application;
+	private byte[] data;
+	private Long created;
+	private Long lastModified;
+
+	public void writeData(ObjectDataOutput out) throws IOException {
+		out.writeUTF(id);
+		out.writeByteArray(data);
+		out.writeObject(created);
+		out.writeObject(lastModified);
+	}
+
+	public void readData(ObjectDataInput in) throws IOException {
+		id = in.readUTF();
+		data = in.readByteArray();
+		created = in.readObject();
+		lastModified = in.readObject();
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getApplication() {
+		return application;
+	}
+
+	public void setApplication(String application) {
+		this.application = application;
+	}
+
+	public byte[] getData() {
+		return data;
+	}
+
+	public void setData(byte[] data) {
+		this.data = data;
+	}
+
+	public Long getCreated() {
+		return created;
+	}
+
+	public void setCreated(Long created) {
+		this.created = created;
+	}
+
+	public Long getLastModified() {
+		return lastModified;
+	}
+
+	public void setLastModified(Long lastModified) {
+		this.lastModified = lastModified;
+	}
+
+}

src/main/java/org/appng/tomcat/session/hazelcast/HazelcastSessionTrackerValve.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2015-2017 the original author or authors.
+ *
+ * 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.appng.tomcat.session.hazelcast;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+
+import org.apache.catalina.Session;
+import org.apache.catalina.Valve;
+import org.apache.catalina.connector.Request;
+import org.apache.catalina.connector.Response;
+import org.apache.catalina.valves.PersistentValve;
+import org.apache.juli.logging.Log;
+import org.appng.tomcat.session.Utils;
+
+/**
+ * A {@link Valve} that uses {@link HazelcastPersistentManager} to store a
+ * {@link Session}
+ */
+public class HazelcastSessionTrackerValve extends PersistentValve {
+
+	private final Log log = Utils.getLog(HazelcastSessionTrackerValve.class);
+
+	@Override
+	public void invoke(Request request, Response response) throws IOException, ServletException {
+		try {
+			getNext().invoke(request, response);
+		} finally {
+			long start = System.currentTimeMillis();
+			HazelcastPersistentManager manager = (HazelcastPersistentManager) request.getContext().getManager();
+			Session session = request.getSessionInternal(false);
+			if (session != null) {
+				if (!Utils.isTemplateRequest(request)) {
+					if (session.isValid()) {
+						log.debug(String.format("Request with session completed, saving session %s", session.getId()));
+						manager.getStore().save(session);
+					} else {
+						log.debug(String.format("HTTP Session has been invalidated, removing %s", session.getId()));
+						manager.remove(session);
+					}
+				}
+			}
+			long duration = System.currentTimeMillis() - start;
+			if (log.isDebugEnabled() && duration > 0) {
+				log.debug(String.format("handling session for %s took %sms", request.getServletPath(), duration));
+			}
+		}
+	}
+
+}