The ClassCastException fixed. I had the valve configured incorreclty in the server.xml.
Would still appreciate feedback on the approach discussed below. Thanks, Gary -----Original Message----- From: Gary Blomquist [mailto:[EMAIL PROTECTED] Sent: Monday, January 16, 2006 2:12 PM To: Tomcat Developers List Subject: Extending PersistentValve ? I would like to be able to use round robin loading balancing with a JDBCStore. However, it appears that using the PersistentManager with JDBC store could cause the sessions to be stale when a session migrates between workers due to the asyncronous behavior of the PersistentManager. (I realize their is a SimpleTcpCluster available as a clusterering solution but I can not use because it relies on multicast.) Viewing the source it appears that the PersistentValve with the PersistentManager and JDBCStore could be a solution. It appears that it would load a session from the store at the begging of each request and save it back to the store at the end of the request. I would like to modify the behavior to only load/save when the session is dirty based on the last_access timestamps. Any comments on the solution? ( I realize their is some performance penalty due to object serialization and writing blobs to the database; however, in our case I think this would not be prohibitive esp. if there is a small amount of data in the session.) Also, when I attempt to run Tomcat with the PersistentValve I get the following exception: SEVERE: An exception or error occurred in the container during the request processing java.lang.ClassCastException: org.apache.catalina.core.StandardEngine at org.apache.catalina.valves.PersistentValve.invoke(PersistentValve.java:9 9) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1 48) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:744) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 674) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket. java:866) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool .java:684) at java.lang.Thread.run(Thread.java:595) Note: (I have not yet made mods to the PersistentValue) Thanks for your assistance, Gary Blomquist --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
