Restructure samples

samples/misc/hazelcast/src/main/java/sample/Initializer.java

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+/*
+ * Copyright 2014-2016 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 sample;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.util.EnumSet;
+import java.util.Map;
+
+import javax.servlet.DispatcherType;
+import javax.servlet.FilterRegistration.Dynamic;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+import javax.servlet.annotation.WebListener;
+
+import com.hazelcast.config.Config;
+import com.hazelcast.config.MapConfig;
+import com.hazelcast.config.NetworkConfig;
+import com.hazelcast.config.SerializerConfig;
+import com.hazelcast.core.Hazelcast;
+import com.hazelcast.core.HazelcastInstance;
+
+import org.springframework.session.ExpiringSession;
+import org.springframework.session.MapSession;
+import org.springframework.session.MapSessionRepository;
+import org.springframework.session.SessionRepository;
+import org.springframework.session.web.http.SessionRepositoryFilter;
+
+@WebListener
+public class Initializer implements ServletContextListener {
+	private HazelcastInstance instance;
+
+	public void contextInitialized(ServletContextEvent sce) {
+		String sessionMapName = "spring:session:sessions";
+		ServletContext sc = sce.getServletContext();
+
+		Config cfg = new Config();
+		NetworkConfig netConfig = new NetworkConfig();
+		netConfig.setPort(getAvailablePort());
+		cfg.setNetworkConfig(netConfig);
+		SerializerConfig serializer = new SerializerConfig().setTypeClass(Object.class)
+				.setImplementation(new ObjectStreamSerializer());
+		cfg.getSerializationConfig().addSerializerConfig(serializer);
+		MapConfig mc = new MapConfig();
+		mc.setName(sessionMapName);
+		mc.setTimeToLiveSeconds(MapSession.DEFAULT_MAX_INACTIVE_INTERVAL_SECONDS);
+		cfg.addMapConfig(mc);
+
+		this.instance = Hazelcast.newHazelcastInstance(cfg);
+		Map<String, ExpiringSession> sessions = this.instance.getMap(sessionMapName);
+
+		SessionRepository<ExpiringSession> sessionRepository = new MapSessionRepository(
+				sessions);
+		SessionRepositoryFilter<ExpiringSession> filter = new SessionRepositoryFilter<ExpiringSession>(
+				sessionRepository);
+		Dynamic fr = sc.addFilter("springSessionFilter", filter);
+		fr.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST), true, "/*");
+	}
+
+	public void contextDestroyed(ServletContextEvent sce) {
+		this.instance.shutdown();
+	}
+
+	private static int getAvailablePort() {
+		ServerSocket socket = null;
+		try {
+			socket = new ServerSocket(0);
+			return socket.getLocalPort();
+		}
+		catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+		finally {
+			try {
+				socket.close();
+			}
+			catch (IOException e) {
+			}
+		}
+	}
+}

samples/misc/hazelcast/src/main/java/sample/ObjectStreamSerializer.java

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+/*
+ * Copyright 2014-2016 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 sample;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.OutputStream;
+
+import com.hazelcast.nio.ObjectDataInput;
+import com.hazelcast.nio.ObjectDataOutput;
+import com.hazelcast.nio.serialization.StreamSerializer;
+
+/**
+ * A {@link StreamSerializer} that uses Java serialization to persist the session. This is
+ * certainly not the most efficient way to persist sessions, but the example is intended
+ * to demonstrate using minimal dependencies. For better serialization methods try using
+ * <a href="https://github.com/EsotericSoftware/kryo">Kryo</a>.
+ *
+ * @author Rob Winch
+ *
+ */
+public class ObjectStreamSerializer implements StreamSerializer<Object> {
+	public int getTypeId() {
+		return 2;
+	}
+
+	public void write(ObjectDataOutput objectDataOutput, Object object)
+			throws IOException {
+		ObjectOutputStream out = new ObjectOutputStream((OutputStream) objectDataOutput);
+		out.writeObject(object);
+		out.flush();
+	}
+
+	public Object read(ObjectDataInput objectDataInput) throws IOException {
+		ObjectInputStream in = new ObjectInputStream((InputStream) objectDataInput);
+		try {
+			return in.readObject();
+		}
+		catch (ClassNotFoundException e) {
+			throw new IOException(e);
+		}
+	}
+
+	public void destroy() {
+	}
+
+}

samples/misc/hazelcast/src/main/java/sample/SessionServlet.java

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+/*
+ * Copyright 2014-2016 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 sample;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author Rob Winch
+ */
+@WebServlet("/session")
+public class SessionServlet extends HttpServlet {
+
+	@Override
+	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
+			throws ServletException, IOException {
+		String attributeName = req.getParameter("attributeName");
+		String attributeValue = req.getParameter("attributeValue");
+		req.getSession().setAttribute(attributeName, attributeValue);
+		resp.sendRedirect(req.getContextPath() + "/");
+	}
+
+	private static final long serialVersionUID = 2878267318695777395L;
+}