Add JdbcOperationsSessionRepository

This commit provides implementation of SessionRepository based
on Spring's JdbcOperations interface.

@EnableJdbcHttpSession annotation is provided to ease the
configuration, together with spring-session-jdbc BOM and schema
creation scripts for all major databases.

Fixes gh-364

samples/httpsession-jdbc-xml/src/integration-test/groovy/sample/AttributeTests.groovy

@@ -0,0 +1,45 @@
+/*
+ * 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 geb.spock.*
+import sample.pages.HomePage;
+import spock.lang.Stepwise
+import pages.*
+
+/**
+ * Tests the CAS sample application using service tickets.
+ *
+ * @author Rob Winch
+ */
+@Stepwise
+class AttributeTests extends GebReportingSpec {
+	def 'first visit no attributes'() {
+		when:
+		to HomePage
+		then:
+		attributes.empty
+	}
+
+	def 'create attribute'() {
+		when:
+		createAttribute('a','b')
+		then:
+		attributes.size() == 1
+		attributes[0].name == 'a'
+		attributes[0].value == 'b'
+	}
+}

samples/httpsession-jdbc-xml/src/integration-test/groovy/sample/pages/HomePage.groovy

@@ -0,0 +1,45 @@
+/*
+ * 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.pages
+
+import geb.*
+
+/**
+ * The home page
+ *
+ * @author Rob Winch
+ */
+class HomePage extends Page {
+	static url = ''
+	static at = { assert driver.title == 'Session Attributes'; true}
+	static content = {
+		form { $('form') }
+		submit { $('input[type=submit]') }
+		createAttribute(required:false) { name, value ->
+			form.attributeName = name
+			form.attributeValue = value
+			submit.click(HomePage)
+		}
+		attributes { moduleList AttributeRow, $("table tr").tail() }
+	}
+}
+class AttributeRow extends Module {
+	static content = {
+		cell { $("td", it) }
+		name { cell(0).text() }
+		value { cell(1).text() }
+	}
+}

samples/httpsession-jdbc-xml/src/main/java/sample/SessionServlet.java

@@ -0,0 +1,36 @@
+/*
+ * 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 javax.servlet.*;
+import javax.servlet.http.*;
+import java.io.IOException;
+
+// tag::class[]
+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;
+}
+
+// end::class[]

samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
+		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">
+
+	<!-- tag::beans[] -->
+
+	<!--1-->
+	<context:annotation-config/>
+	<bean class="org.springframework.session.jdbc.config.annotation.web.http.JdbcHttpSessionConfiguration"/>
+
+	<!--2-->
+	<jdbc:embedded-database id="dataSource" type="H2">
+		<jdbc:script location="classpath:org/springframework/session/jdbc/schema-h2.sql"/>
+	</jdbc:embedded-database>
+
+	<!--3-->
+	<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
+		<constructor-arg ref="dataSource"/>
+	</bean>
+	<!-- end::beans[] -->
+</beans>

samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
+		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
+	<!--
+	- Location of the XML file that defines the root application context
+	- Applied by ContextLoaderListener.
+	-->
+	<!-- tag::context-param[] -->
+	<context-param>
+		<param-name>contextConfigLocation</param-name>
+		<param-value>
+			/WEB-INF/spring/*.xml
+		</param-value>
+	</context-param>
+	<!-- end::context-param[] -->
+
+	<!-- tag::springSessionRepositoryFilter[] -->
+	<filter>
+		<filter-name>springSessionRepositoryFilter</filter-name>
+		<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
+	</filter>
+	<filter-mapping>
+		<filter-name>springSessionRepositoryFilter</filter-name>
+		<url-pattern>/*</url-pattern>
+	</filter-mapping>
+	<!-- end::springSessionRepositoryFilter[] -->
+
+	<!--
+	- Loads the root application context of this web app at startup.
+	- The application context is then available via
+	- WebApplicationContextUtils.getWebApplicationContext(servletContext).
+	-->
+	<!-- tag::listeners[] -->
+	<listener>
+		<listener-class>
+			org.springframework.web.context.ContextLoaderListener
+		</listener-class>
+	</listener>
+	<!-- end::listeners[] -->
+
+	<servlet>
+		<servlet-name>session</servlet-name>
+		<servlet-class>sample.SessionServlet</servlet-class>
+	</servlet>
+
+	<servlet-mapping>
+		<servlet-name>session</servlet-name>
+		<url-pattern>/session</url-pattern>
+	</servlet-mapping>
+
+	<welcome-file-list>
+		<welcome-file>index.jsp</welcome-file>
+	</welcome-file-list>
+</web-app>

samples/httpsession-jdbc-xml/src/main/webapp/index.jsp

@@ -0,0 +1,48 @@
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<title>Session Attributes</title>
+	<link rel="stylesheet" href="assets/bootstrap.min.css">
+	<style type="text/css">
+		body {
+			padding: 1em;
+		}
+	</style>
+</head>
+<body>
+	<div class="container">
+		<h1>Description</h1>
+		<p>This application demonstrates how to use a relational database to back your session. Notice that there is no JSESSIONID cookie. We are also able to customize the way of identifying what the requested session id is.</p>
+
+		<h1>Try it</h1>
+
+		<form class="form-inline" role="form" action="./session" method="post">
+			<label for="attributeName">Attribute Name</label>
+			<input id="attributeName" type="text" name="attributeName"/>
+			<label for="attributeValue">Attribute Value</label>
+			<input id="attributeValue" type="text" name="attributeValue"/>
+			<input type="submit" value="Set Attribute"/>
+		</form>
+
+		<hr/>
+
+		<table class="table table-striped">
+			<thead>
+			<tr>
+				<th>Attribute Name</th>
+				<th>Attribute Value</th>
+			</tr>
+			</thead>
+			<tbody>
+			<c:forEach items="${sessionScope}" var="attr">
+				<tr>
+					<td><c:out value="${attr.key}"/></td>
+					<td><c:out value="${attr.value}"/></td>
+				</tr>
+			</c:forEach>
+			</tbody>
+		</table>
+	</div>
+</body>
+</html>