Re: How does Tomcat manage sesssions ?

[Xavier MOGHRABI]

I used that example to write my Manager config. However when the manager 
is nested inside the host it doesn't look to work since I don't have any 
row in my database.
So I nest the manager in a context as below, and I can see my sessions 
in the database.

<Host name="localhost" debug="0" appBase="webapps" unpackWARs="true" 
autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
...
<Context path="/jsp-examples" 
docBase="${catalina.home}/webapps/jsp-examples" debug="10" 
privileged="false">
   <Manager className="org.apache.catalina.session.PersistentManager" 
debug="10" saveOnRestart="true" checkInterval="1" maxActiveSessions="-1" 
minIdleSwap="-1" maxIdleSwap="0" maxIdleBackup="0">
       <Store className="org.apache.catalina.session.JDBCStore" 
debug="9" 
connectionURL="jdbc:sapdb://192.168.1.3/COCHISE?user=DBA&amp;password=DBA" 
                              driverName="com.sap.dbtech.jdbc.DriverSapDB"
       sessionAppCol="app_name"
       sessionDataCol="session_data"
       sessionIdCol="session_id"
       sessionLastAccessedCol="last_access"
       sessionMaxInactiveCol="max_inactive"
       sessionTable="DBA.tomcat_sessions"
       sessionValidCol="valid_session"/>
    </Manager>
</Context>
</Host>

That solution doesn't pleased me a lot because I want to store the 
session for all deployed context. How can I do that ?

I have an other question : should I write something in my servlet to 
recover a session for example after a crash or does tomcat do it 
automatically ?

Thanks a lot
Xavier
Shapira, Yoav a �crit :
Hi,
 

I've read all the server.xml file and there is no marks of the Manager
configuration.
   

The example was removed a while ago, but you can still see it in older
versions of server.xml by going to the CVS or downloading an old
release:
http://cvs.apache.org/viewcvs.cgi/jakarta-tomcat-catalina/catalina/src/c
onf/server.xml?annotate=1.2 for example has a complete example of a
persistent manager commented out.
 

I saw in the documentation that "A Manager element MAY be nested inside
a Context component". And In the server.xml there aren't any contexts.
   

It MAY be nested inside a Context, but doesn't have to be.  It can be
inside a Host or an Engine, both of which are more common than having a
Manager inside a Context.
 

So don't you think that the file to be configured must be
${CATALINA_HOME}\conf\Catalina\localhost\manager.xml ?
   

No, that's for tomcat's Manager webapp, which is not the same thing as
the session Manager.  I realize the names might be confusing.
 

By the way, don't you have an example ?
   

We used to ship one with tomcat in server.xml, so see above for
accessing older versions of that file.
Yoav Shapira

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