[jira] [Commented] (KYLIN-4423) use spring session to support clustered sessions

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KYLIN-4423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17056075#comment-17056075 ] 

ASF GitHub Bot commented on KYLIN-4423:
---------------------------------------

xiacongling commented on pull request #1157: KYLIN-4423 use spring session to support clustered sessions
URL: https://github.com/apache/kylin/pull/1157
 
 
   add spring session to manage user sessions, one can define a proper SessionRepository to enable it. for Redis repository, the following dependencies and spring bean can be added:
   ```
   <!-- dependencies with best compatible version, add it to pom.xml -->
   <dependency>
       <groupId>org.springframework.data</groupId>
       <artifactId>spring-data-redis</artifactId>
       <version>1.8.6.RELEASE</version>
   </dependency>
   <dependency>
       <groupId>redis.clients</groupId>
       <artifactId>jedis</artifactId>
       <version>2.9.3</version>
   </dependency>
   
   <!-- spring beans to add in applicationContext.xml -->
   <bean id="redisConnectionFactory"
         class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
       <property name="hostName" value="${kylin.session.redis.host:127.0.0.1}"/>
       <property name="port" value="${kylin.session.redis.port:6379}"/>
   </bean>
   <bean id="redisSessionRepository"
         class="org.springframework.session.data.redis.RedisOperationsSessionRepository">
       <constructor-arg index="0" ref="redisConnectionFactory"/>
   </bean>
   ```
   see also: https://issues.apache.org/jira/browse/KYLIN-4423
 
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> use spring session to support clustered sessions
> ------------------------------------------------
>
>                 Key: KYLIN-4423
>                 URL: https://issues.apache.org/jira/browse/KYLIN-4423
>             Project: Kylin
>          Issue Type: New Feature
>            Reporter: Congling Xia
>            Assignee: Congling Xia
>            Priority: Major
>
> When routing different APIs to different kylin instances, user may encounter permission problems since there are separate sessions.
> To share the sessions, one can config tomcat cluster to replicate all sessions to all instances. It's a HA solution for Tomcat, and is rarely used in recent years. Another idea is to store sessions in shared external storages like Redis. 
> We choose the latter solution. Spring Session is used to help manage user sessions and some work has been done to make it pluggable.



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