spring-boot session redis

通常我们的web服务为了分担压力都会部署在多个机器上，如果用到session，就会需要session共享。session共享方案有多种，spring-session是其中一种。

spring-session支持多种存储类型，本文利用Redis进行存储

pom.xml

 <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.0.RELEASE</version>
    <!--自己选择spring-boot的版本-->
    <relativePath/>
</parent>

<properties>
    <main.basedir>${basedir}/..</main.basedir>
    <java.source.version>1.7</java.source.version>
    <java.target.version>1.7</java.target.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-freemarker</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.session</groupId>
        <artifactId>spring-session</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

application.yml

server:
  port: 7979
  context-path: /
  session:
    timeout: 2400

spring:
  session:
    store-type: redis #设置session存储类型为redis
# 配置redis连接信息
  redis:
    host: 192.168.2.200
    port: 6379
    password: 123456
    database: 1
      pool:
        max-idle: 10
        max-wait: 2000

启动类

@SpringBootApplication
@EnableRedisHttpSession
public class MyApplication  extends WebMvcConfigurerAdapter {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

}

一般这样就可以了， 但有时在启动时会报Redis错误

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'enableRedisKeyspaceNotificationsInitializer' defined in org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration: Invocation of init method fail
ed; nested exception is java.lang.IllegalStateException: Unable to configure Redis to keyspace notifications. See http://docs.spring.io/spring-session/docs/current/reference/html5/#api-redisoperationssessionrepository-sessiondestroyedevent
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174)
    at com.oqiji.ls.ShopApplication.main(ShopApplication.java:22)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58)
Caused by: java.lang.IllegalStateException: Unable to configure Redis to keyspace notifications. See http://docs.spring.io/spring-session/docs/current/reference/html5/#api-redisoperationssessionrepository-sessiondestroyedevent
    at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.getNotifyOptions(ConfigureNotifyKeyspaceEventsAction.java:81)
    at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.configure(ConfigureNotifyKeyspaceEventsAction.java:55)
    at org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration$EnableRedisKeyspaceNotificationsInitializer.afterPropertiesSet(RedisHttpSessionConfiguration.java:224)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
    ... 24 common frames omitted
Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: ERR unknown command config; nested exception is redis.clients.jedis.exceptions.JedisDataException: ERR unknown command config
    at org.springframework.data.redis.connection.jedis.JedisExceptionConverter.convert(JedisExceptionConverter.java:64)
    at org.springframework.data.redis.connection.jedis.JedisExceptionConverter.convert(JedisExceptionConverter.java:41)
    at org.springframework.data.redis.PassThroughExceptionTranslationStrategy.translate(PassThroughExceptionTranslationStrategy.java:37)
    at org.springframework.data.redis.FallbackExceptionTranslationStrategy.translate(FallbackExceptionTranslationStrategy.java:37)
    at org.springframework.data.redis.connection.jedis.JedisConnection.convertJedisAccessException(JedisConnection.java:212)
    at org.springframework.data.redis.connection.jedis.JedisConnection.getConfig(JedisConnection.java:573)
    at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.getNotifyOptions(ConfigureNotifyKeyspaceEventsAction.java:74)
    ... 28 common frames omitted
Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR unknown command config
    at redis.clients.jedis.Protocol.processError(Protocol.java:123)
    at redis.clients.jedis.Protocol.process(Protocol.java:157)
    at redis.clients.jedis.Protocol.read(Protocol.java:211)
    at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:297)
    at redis.clients.jedis.Connection.getBinaryMultiBulkReply(Connection.java:233)
    at redis.clients.jedis.Connection.getMultiBulkReply(Connection.java:226)
    at redis.clients.jedis.Jedis.configGet(Jedis.java:2578)
    at org.springframework.data.redis.connection.jedis.JedisConnection.getConfig(JedisConnection.java:571)
    ... 29 common frames omitted

根据提示，去相应的页面查看解决方案

Firing SessionDeletedEvent or SessionExpiredEvent is made available through the SessionMessageListener which listens to Redis Keyspace events. In order for this to work, Redis Keyspace events for Generic commands and Expired events needs to be enabled. For example:

redis-cli config set notify-keyspace-events Egx

If you are using @EnableRedisHttpSession the SessionMessageListener and enabling the necessary Redis Keyspace events is done automatically. However, in a secured Redis enviornment the config command is disabled. This means that Spring Session cannot configure Redis Keyspace events for you. To disable the automatic configuration add ConfigureRedisAction.NO_OP as a bean.

For example, Java Configuration can use the following:

@Bean
public static ConfigureRedisAction configureRedisAction() {
    return ConfigureRedisAction.NO_OP;
}