Spring Boot + Redis for session sharing

This is a tutorial to implement session sharing with spring boot + redis.

In the spring boot documentation, tell us to add @enableredishttpsession to enable spring session support, which is configured as follows:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. @Configuration

2. @EnableRedisHttpSession

3. Public class Redissessionconfig {

4. }

@enableredishttpsession This annotation is provided by Spring-session-data-redis, so add it in the Pom.xml file:

Java code   650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Collection code "style=" border:0px; "/>

1. <dependency>  

2.         < groupid>org.springframework.boot</groupid>  

3.          <artifactid>spring-boot-starter-redis</artifactid>  

4. </dependency>  

5. <dependency>  

6.          <groupid>org.springframework.session</groupid>  

7.         <artifactid>spring-session-data-redis</ artifactid>  

8. </dependency>  

Next, you need to configure the location of the Redis server in Application.properties, where we use this machine:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. Spring.redis.host=localhost

2. spring.redis.port=6379

In this way, the simplest spring boot + REDIS Implementation session sharing is complete, below to test.

First we open two Tomcat services, with ports 8080 and 9090, set in Application.properties " " :

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. server.port=8080

Next, define a controller:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

2. @RestController

4. @RequestMapping (value = "/admin/v1")

6. Public class Quickrun {

8. @RequestMapping (value = "/first", method = Requestmethod.get)

10. Public Map<string, object> Firstresp (HttpServletRequest request) {

12. map<string, object> map = new hashmap<> ();

14. Request.getsession (). SetAttribute ("Request Url", Request.getrequesturl ());

16. Map.put ("Request Url", Request.getrequesturl ());

18. return map;

20. }

24. @RequestMapping (value = "/sessions", method = Requestmethod.get)

26. Public Object sessions (HttpServletRequest request) {

28. map<string, object> map = new hashmap<> ();

30. Map.put ("SessionId", Request.getsession (). GetId ());

32. Map.put ("message", Request.getsession (). getattribute ("map"));

34. return map;

36. }

38. }

After starting the access test, first access 8080-port Tomcat, return to get "" :

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. {"request Url":"Http://localhost:8080/admin/v1/first"}

Next, we visit the 8080 port of sessions and return:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. {"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost : 8080/admin/v1/first "}

Finally, visit the sessions of Port 9090 and return:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. {"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost : 8080/admin/v1/first "}

As can be seen, 8080 and 90,902 servers return the results, the realization of the session sharing

If you are accessing the first of Port 9090 at this point, return:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. {"request Url":"Http://localhost:9090/admin/v1/first"}

The sessions of two servers are returned:

Java code 650) this.width=650; "class=" star "src=" Http://zk-chs.iteye.com/images/icon_star.png "alt=" Favorite Code "style=" border:0px; "/>

1. {"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost : 9090/admin/v1/first "}

Using spring boot + Redis to achieve session sharing is very simple and useful, with nginx load balancing, you can achieve distributed applications.

This time Redis does not carry out the master-slave, read-write separation and so on configuration (_ (: З"∠) _ is actually Bo Master lazy, has not tried ...)

Moreover, Nginx single point of failure is also a barrier to our application ... There may be an improved version of this blog later, such as load balancing with zookeeper, so please look forward to it.

Spring Boot + Redis for session sharing