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Add JDBC documentation

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Fixes gh-415
This commit is contained in:
Vedran Pavic
2016-03-09 00:26:24 +01:00
committed by Rob Winch
parent 9b989c4a3e
commit bd6d5bf419
8 changed files with 468 additions and 2 deletions
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2
docs/build.gradle
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@@ -33,6 +33,7 @@ dependencies {
"org.springframework.data:spring-data-gemfire:$springDataGemFireVersion",
"org.springframework:spring-websocket:${springVersion}",
"org.springframework:spring-messaging:${springVersion}",
"org.springframework:spring-jdbc:${springVersion}",
"org.springframework.security:spring-security-web:${springSecurityVersion}",
"org.springframework.security:spring-security-test:${springSecurityVersion}",
'junit:junit:4.11',
@@ -60,6 +61,7 @@ asciidoctor {
'docs-test-dir' : rootProject.projectDir.path + '/docs/src/test/java/',
'docs-test-resources-dir' : rootProject.projectDir.path + '/docs/src/test/resources/',
'samples-dir' : rootProject.projectDir.path + '/samples/',
'session-main-resources-dir' : rootProject.projectDir.path + '/spring-session/src/main/resources/',
'source-highlighter' : 'coderay',
'imagesdir':'./images',

159
docs/src/docs/asciidoc/guides/httpsession-jdbc-xml.adoc Normal file
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@@ -0,0 +1,159 @@
= Spring Session - HttpSession (Quick Start)
Rob Winch, Vedran Pavić
:toc:
This guide describes how to use Spring Session to transparently leverage a relational to back a web application's `HttpSession` with XML based configuration.
NOTE: The completed guide can be found in the <<httpsession-jdbc-xml-sample, httpsession-jdbc-xml sample application>>.
== Updating Dependencies
Before you use Spring Session, you must ensure to update your dependencies.
If you are using Maven, ensure to add the following dependencies:
.pom.xml
[source,xml]
[subs="verbatim,attributes"]
----
<dependencies>
<!-- ... -->
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-jdbc</artifactId>
<version>{spring-session-version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>{spring-version}</version>
</dependency>
</dependencies>
----
ifeval::["{version-snapshot}" == "true"]
Since we are using a SNAPSHOT version, we need to ensure to add the Spring Snapshot Maven Repository.
Ensure you have the following in your pom.xml:
.pom.xml
[source,xml]
----
<repositories>
<!-- ... -->
<repository>
<id>spring-snapshot</id>
<url>https://repo.spring.io/libs-snapshot</url>
</repository>
</repositories>
----
endif::[]
ifeval::["{version-milestone}" == "true"]
Since We are using a Milestone version, we need to ensure to add the Spring Milestone Maven Repository.
Ensure you have the following in your pom.xml:
.pom.xml
[source,xml]
----
<repository>
<id>spring-milestone</id>
<url>https://repo.spring.io/libs-milestone</url>
</repository>
----
endif::[]
// tag::config[]
[[httpsession-jdbc-xml-spring-configuration]]
== Spring XML Configuration
After adding the required dependencies, we can create our Spring configuration.
The Spring configuration is responsible for creating a Servlet Filter that replaces the `HttpSession` implementation with an implementation backed by Spring Session.
Add the following Spring Configuration:
.src/main/webapp/WEB-INF/spring/session.xml
[source,xml,indent=0]
----
include::{samples-dir}httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml[tags=beans]
----
<1> We use the combination of `<context:annotation-config/>` and `JdbcHttpSessionConfiguration` because Spring Session does not yet provide XML Namespace support (see https://github.com/spring-projects/spring-session/issues/104[gh-104]).
This creates a Spring Bean with the name of `springSessionRepositoryFilter` that implements Filter.
The filter is what is in charge of replacing the `HttpSession` implementation to be backed by Spring Session.
In this instance Spring Session is backed by a relational database.
<2> We create a `dataSource` that connects Spring Session to an embedded instance of H2 database.
We configure the H2 database to create database tables using the SQL script which is included in Spring Session.
== XML Servlet Container Initialization
Our <<httpsession-xml-spring-configuration,Spring Configuration>> created a Spring Bean named `springSessionRepositoryFilter` that implements `Filter`.
The `springSessionRepositoryFilter` bean is responsible for replacing the `HttpSession` with a custom implementation that is backed by Spring Session.
In order for our `Filter` to do its magic, we need to instruct Spring to load our `session.xml` configuration.
We do this with the following configuration:
.src/main/webapp/WEB-INF/web.xml
[source,xml,indent=0]
----
include::{samples-dir}httpsession-xml/src/main/webapp/WEB-INF/web.xml[tags=context-param]
include::{samples-dir}httpsession-xml/src/main/webapp/WEB-INF/web.xml[tags=listeners]
----
The http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#context-create[ContextLoaderListener] reads the contextConfigLocation and picks up our session.xml configuration.
Last we need to ensure that our Servlet Container (i.e. Tomcat) uses our `springSessionRepositoryFilter` for every request.
The following snippet performs this last step for us:
.src/main/webapp/WEB-INF/web.xml
[source,xml,indent=0]
----
include::{samples-dir}httpsession-xml/src/main/webapp/WEB-INF/web.xml[tags=springSessionRepositoryFilter]
----
The http://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/filter/DelegatingFilterProxy.html[DelegatingFilterProxy] will look up a Bean by the name of `springSessionRepositoryFilter` and cast it to a `Filter`.
For every request that `DelegatingFilterProxy` is invoked, the `springSessionRepositoryFilter` will be invoked.
// end::config[]
[[httpsession-jdbc-xml-sample]]
== httpsession-jdbc-xml Sample Application
=== Running the httpsession-jdbc-xml Sample Application
You can run the sample by obtaining the {download-url}[source code] and invoking the following command:
----
$ ./gradlew :samples:httpsession-jdbc-xml:tomcatRun
----
You should now be able to access the application at http://localhost:8080/
=== Exploring the httpsession-jdbc-xml Sample Application
Try using the application. Fill out the form with the following information:
* **Attribute Name:** _username_
* **Attribute Value:** _rob_
Now click the **Set Attribute** button. You should now see the values displayed in the table.
=== How does it work?
We interact with the standard `HttpSession` in the `SessionServlet` shown below:
.src/main/java/sample/SessionServlet.java
[source,java]
----
include::{samples-dir}httpsession-jdbc-xml/src/main/java/sample/SessionServlet.java[tags=class]
----
Instead of using Tomcat's `HttpSession`, we are actually persisting the values in H2 database.
Spring Session creates a cookie named SESSION in your browser that contains the id of your session.
Go ahead and view the cookies (click for help with https://developer.chrome.com/devtools/docs/resources#cookies[Chrome] or https://getfirebug.com/wiki/index.php/Cookies_Panel#Cookies_List[Firefox]).
If you like, you can easily remove the session using H2 web console available at: http://localhost:8080/console (use `jdbc:h2:mem:testdb` for JDBC URL)
Now visit the application at http://localhost:8080/ and observe that the attribute we added is no longer displayed.

149
docs/src/docs/asciidoc/guides/httpsession-jdbc.adoc Normal file
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@@ -0,0 +1,149 @@
= Spring Session - HttpSession (Quick Start)
Rob Winch, Vedran Pavić
:toc:
This guide describes how to use Spring Session to transparently leverage a relational database to back a web application's `HttpSession` with Java Configuration.
NOTE: The completed guide can be found in the <<httpsession-jdbc-sample, httpsession-jdbc sample application>>.
== Updating Dependencies
Before you use Spring Session, you must ensure to update your dependencies.
If you are using Maven, ensure to add the following dependencies:
.pom.xml
[source,xml]
[subs="verbatim,attributes"]
----
<dependencies>
<!-- ... -->
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-jdbc</artifactId>
<version>{spring-session-version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>{spring-version}</version>
</dependency>
</dependencies>
----
ifeval::["{version-snapshot}" == "true"]
Since we are using a SNAPSHOT version, we need to ensure to add the Spring Snapshot Maven Repository.
Ensure you have the following in your pom.xml:
.pom.xml
[source,xml]
----
<repositories>
<!-- ... -->
<repository>
<id>spring-snapshot</id>
<url>https://repo.spring.io/libs-snapshot</url>
</repository>
</repositories>
----
endif::[]
ifeval::["{version-milestone}" == "true"]
Since We are using a Milestone version, we need to ensure to add the Spring Milestone Maven Repository.
Ensure you have the following in your pom.xml:
.pom.xml
[source,xml]
----
<repository>
<id>spring-milestone</id>
<url>https://repo.spring.io/libs-milestone</url>
</repository>
----
endif::[]
// tag::config[]
[[httpsession-jdbc-spring-configuration]]
== Spring Java Configuration
After adding the required dependencies, we can create our Spring configuration.
The Spring configuration is responsible for creating a Servlet Filter that replaces the `HttpSession` implementation with an implementation backed by Spring Session.
Add the following Spring Configuration:
[source,java]
----
include::{samples-dir}httpsession-jdbc/src/main/java/sample/Config.java[tags=class]
----
<1> The `@EnableJdbcHttpSession` annotation creates a Spring Bean with the name of `springSessionRepositoryFilter` that implements Filter.
The filter is what is in charge of replacing the `HttpSession` implementation to be backed by Spring Session.
In this instance Spring Session is backed by a relational database.
<2> We create a `dataSource` that connects Spring Session to an embedded instance of H2 database.
We configure the H2 database to create database tables using the SQL script which is included in Spring Session.
== Java Servlet Container Initialization
Our <<httpsession-spring-configuration,Spring Configuration>> created a Spring Bean named `springSessionRepositoryFilter` that implements `Filter`.
The `springSessionRepositoryFilter` bean is responsible for replacing the `HttpSession` with a custom implementation that is backed by Spring Session.
In order for our `Filter` to do its magic, Spring needs to load our `Config` class.
Last we need to ensure that our Servlet Container (i.e. Tomcat) uses our `springSessionRepositoryFilter` for every request.
Fortunately, Spring Session provides a utility class named `AbstractHttpSessionApplicationInitializer` both of these steps extremely easy.
You can find an example below:
.src/main/java/sample/Initializer.java
[source,java]
----
include::{samples-dir}httpsession/src/main/java/sample/Initializer.java[tags=class]
----
NOTE: The name of our class (Initializer) does not matter. What is important is that we extend `AbstractHttpSessionApplicationInitializer`.
<1> The first step is to extend `AbstractHttpSessionApplicationInitializer`.
This ensures that the Spring Bean by the name `springSessionRepositoryFilter` is registered with our Servlet Container for every request.
<2> `AbstractHttpSessionApplicationInitializer` also provides a mechanism to easily ensure Spring loads our `Config`.
// end::config[]
[[httpsession-jdbc-sample]]
== httpsession-jdbc Sample Application
=== Running the httpsession-jdbc Sample Application
You can run the sample by obtaining the {download-url}[source code] and invoking the following command:
----
$ ./gradlew :samples:httpsession-jdbc:tomcatRun
----
You should now be able to access the application at http://localhost:8080/
=== Exploring the httpsession-jdbc Sample Application
Try using the application. Fill out the form with the following information:
* **Attribute Name:** _username_
* **Attribute Value:** _rob_
Now click the **Set Attribute** button. You should now see the values displayed in the table.
=== How does it work?
We interact with the standard `HttpSession` in the `SessionServlet` shown below:
.src/main/java/sample/SessionServlet.java
[source,java]
----
include::{samples-dir}httpsession-jdbc/src/main/java/sample/SessionServlet.java[tags=class]
----
Instead of using Tomcat's `HttpSession`, we are actually persisting the values in H2 database.
Spring Session creates a cookie named SESSION in your browser that contains the id of your session.
Go ahead and view the cookies (click for help with https://developer.chrome.com/devtools/docs/resources#cookies[Chrome] or https://getfirebug.com/wiki/index.php/Cookies_Panel#Cookies_List[Firefox]).
If you like, you can easily remove the session using H2 web console available at: http://localhost:8080/console (use `jdbc:h2:mem:testdb` for JDBC URL)
Now visit the application at http://localhost:8080/ and observe that the attribute we added is no longer displayed.

100
docs/src/docs/asciidoc/index.adoc
View File

@@ -1,5 +1,5 @@
= Spring Session
Rob Winch
Rob Winch, Vedran Pavić
:doctype: book
:indexdoc-tests: {docs-test-dir}docs/IndexDocTests.java
:websocketdoc-test-dir: {docs-test-dir}docs/websocket/
@@ -113,6 +113,14 @@ If you are looking to get started with Spring Session, the best place to start i
| Demonstrates how to use Spring Session and Hazelcast with an existing Spring Security application.
| link:guides/hazelcast-spring.html[Hazelcast Spring Guide]
| {gh-samples-url}httpsession-jdbc[HttpSession JDBC]
| Demonstrates how to use Spring Session to replace the `HttpSession` with a relational database store.
| link:guides/httpsession-jdbc.html[HttpSession JDBC Guide]
| {gh-samples-url}httpsession-jdbc-xml[HttpSession JDBC XML]
| Demonstrates how to use Spring Session to replace the `HttpSession` with a relational database store using XML based configuration.
| link:guides/httpsession-jdbc-xml.html[HttpSession JDBC XML Guide]
|===
[[httpsession]]
@@ -263,6 +271,35 @@ Guide when integrating with your own application.
include::guides/httpsession-gemfire-p2p-xml.adoc[tags=config,leveloffset=+3]
[[httpsession-jdbc]]
=== HttpSession with JDBC
Using Spring Session with `HttpSession` is enabled by adding a Servlet Filter before anything that uses the `HttpSession`.
You can choose from enabling this using either:
* <<httpsession-jdbc-jc,Java Based Configuration>>
* <<httpsession-jdbc-xml,XML Based Configuration>>
[[httpsession-jdbc-jc]]
==== JDBC Java Based Configuration
This section describes how to use a relational database to back `HttpSession` using Java based configuration.
NOTE: The <<samples, HttpSession JDBC Sample>> provides a working sample on how to integrate Spring Session and `HttpSession` using Java configuration.
You can read the basic steps for integration below, but you are encouraged to follow along with the detailed HttpSession JDBC Guide when integrating with your own application.
include::guides/httpsession-jdbc.adoc[tags=config,leveloffset=+3]
[[httpsession-jdbc-xml]]
==== JDBC XML Based Configuration
This section describes how to use a relational database to back `HttpSession` using XML based configuration.
NOTE: The <<samples, HttpSession JDBC XML Sample>> provides a working sample on how to integrate Spring Session and `HttpSession` using XML configuration.
You can read the basic steps for integration below, but you are encouraged to follow along with the detailed HttpSession JDBC XML Guide when integrating with your own application.
include::guides/httpsession-jdbc-xml.adoc[tags=config,leveloffset=+3]
[[httpsession-mongo]]
=== HttpSession with Mongo
@@ -906,6 +943,67 @@ To run it use the following:
./gradlew :samples:hazelcast-spring:tomcatRun
[[api-jdbcoperationssessionrepository]]
=== JdbcOperationsSessionRepository
`JdbcOperationsSessionRepository` is a `SessionRepository` implementation that uses Spring's `JdbcOperations` to store sessions in a relational database.
In a web environment, this is typically used in combination with `SessionRepositoryFilter`.
Please note that this implementation does not support publishing of session events.
[[api-jdbcoperationssessionrepository-new]]
==== Instantiating a JdbcOperationsSessionRepository
A typical example of how to create a new instance can be seen below:
[source,java,indent=0]
----
include::{indexdoc-tests}[tags=new-jdbcoperationssessionrepository]
----
For additional information on how to create and configure a `JdbcTemplate`, refer to the Spring Framework Reference Documentation.
[[api-jdbcoperationssessionrepository-config]]
==== EnableJdbcHttpSession
In a web environment, the simplest way to create a new `JdbcOperationsSessionRepository` is to use `@EnableJdbcHttpSession`.
Complete example usage can be found in the <<samples>>
You can use the following attributes to customize the configuration:
* **tableName** - the name of database table used by Spring Session to store sessions
* **maxInactiveIntervalInSeconds** - the amount of time before the session will expire in seconds
===== Custom LobHandler
You can customize the BLOB handling by creating a Bean named `springSessionLobHandler` that implements `LobHandler`.
===== Custom ConversionService
You can customize the default serialization and deserialization of the session by providing a `ConversionService` instance.
When working in a typical Spring environment, the default `ConversionService` Bean (named `conversionService`) will be automatically picked up and used for serialization and deserialization.
However, you can override the default `ConversionService` by providing a Bean named `springSessionConversionService`.
[[api-jdbcoperationssessionrepository-storage]]
==== Storage Details
By default, this implementation uses `SPRING_SESSION` table to store sessions. Note that the table name can be easily customized as already described.
Due to the differences between the various database vendors, especially when it comes to storing binary data, make sure to use SQL script specific to your database.
Scripts for most major database vendors are packaged as `org/springframework/session/jdbc/schema-\*.sql`, where `*` is the target database type.
For example, with PostgreSQL database you would use the following schema script:
[source,sql,indent=0]
----
include::{session-main-resources-dir}org/springframework/session/jdbc/schema-postgresql.sql[]
----
And with MySQL database:
[source,sql,indent=0]
----
include::{session-main-resources-dir}org/springframework/session/jdbc/schema-mysql.sql[]
----
[[community]]
== Spring Session Community

16
docs/src/test/java/docs/IndexDocTests.java
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@@ -19,12 +19,14 @@ package docs;
import org.junit.Test;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.mock.web.MockServletContext;
import org.springframework.session.ExpiringSession;
import org.springframework.session.MapSessionRepository;
import org.springframework.session.Session;
import org.springframework.session.SessionRepository;
import org.springframework.session.data.redis.RedisOperationsSessionRepository;
import org.springframework.session.jdbc.JdbcOperationsSessionRepository;
import org.springframework.session.web.http.SessionRepositoryFilter;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
@@ -32,6 +34,7 @@ import static org.assertj.core.api.Assertions.assertThat;
/**
* @author Rob Winch
* @author Vedran Pavic
*/
public class IndexDocTests {
static final String ATTR_USER = "user";
@@ -113,6 +116,19 @@ public class IndexDocTests {
// end::new-mapsessionrepository[]
}
@Test
@SuppressWarnings("unused")
public void newJdbcOperationsSessionRepository() {
// tag::new-jdbcoperationssessionrepository[]
JdbcTemplate jdbcTemplate = new JdbcTemplate();
// ... configure JdbcTemplate ...
SessionRepository<? extends ExpiringSession> repository =
new JdbcOperationsSessionRepository(jdbcTemplate);
// end::new-jdbcoperationssessionrepository[]
}
@Test
public void runSpringHttpSessionConfig() {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();

2
samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml
View File

@@ -14,7 +14,7 @@
<bean class="org.springframework.session.jdbc.config.annotation.web.http.JdbcHttpSessionConfiguration"/>
<!--2-->
<jdbc:embedded-database id="dataSource" type="H2">
<jdbc:embedded-database id="dataSource" database-name="testdb" type="H2">
<jdbc:script location="classpath:org/springframework/session/jdbc/schema-h2.sql"/>
</jdbc:embedded-database>

10
samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/web.xml
View File

@@ -49,6 +49,16 @@
<url-pattern>/session</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>h2console</servlet-name>
<servlet-class>org.h2.server.web.WebServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>h2console</servlet-name>
<url-pattern>/console/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

32
samples/httpsession-jdbc/src/main/java/sample/H2ConsoleInitializer.java Normal file
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@@ -0,0 +1,32 @@
/*
* 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.ServletContext;
import javax.servlet.ServletException;
import org.h2.server.web.WebServlet;
import org.springframework.web.WebApplicationInitializer;
public class H2ConsoleInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
servletContext.addServlet("h2console", new WebServlet()).addMapping("/console/*");
}
}