-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Sreyan,
On 1/17/15 12:45 PM, sreya...@gmail.com wrote: > I am new to Tomcat and interested in learning how to works > internally. I was reading the following thread on JavaRanch but it > did not give a concrete answer-: > > http://www.coderanch.com/t/467039/Tomcat/sessions-stored Tim Holloway answered this in the second response on "10/19/2009 5:48:56 AM". > Does the container use an Array-List or a HashMap to store the > HTTPSessions? The servlet specification does not mandate any particular storage mechanism, so the container is free to decide what is best. > What is the limit of the maximum sessions? There is a very large theoretical maximum of (Integer.MAX_VALUE/2) * Integer.MAX_VALUE because String values (session ids) are limited to MAX_VALUE characters and characters are identified by integers. But you'll run out of storage (or any kind) way before that. > Are the sessions stored in RAM? The servlet specification does not mandate any particular storage mechanism, so the container is free to decide what is best. In Tomcat, sessions are stored in memory (Java heap) by default. There are other mechanisms that can persist session information to various places. The standard manager will persist sessions to the disk during webapp reloads, but otherwise the sessions reside exclusively in memory. > I am aware that persistent sessions will need a > data-store/database to the sessions. But how does it handle the non > persistent ones ? I encourage you to look at the source for StandardManager if you want to really know what's going on. > I have also consulted-: > http://tomcat.apache.org/tomcat-8.0-doc/config/manager.html > > But this too failed to give the location of non-persistent > sessions. Java heap memory. > Anyone who does Tomcat development and meddles around with the > source, there feedback will be highly appreciated. Check the source code. Start with org.apache.catalina.session.StandardManager - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJUurDmAAoJEBzwKT+lPKRYXaAQALx2GJgHjYNaj24WymwvkOoX sf1r4e7jQJyKvAMvlDqw5nyULlnCgP+ty2Eti/zEJSadQpvFvJwq+eImtYEWONsF Ox0Mi8wVHZgoe8sOFowUY+Jh3QlNBf+fa0y/6zszMvxmO4oajXNOwVq/tqzPlTvb ta2LiGhj+bqcuklS45sBNG29MRXYLV4bwXm0SOSBTUhpA2f3HGvcDFJ7jSlPbChC 4xb9jObhOzdrrFAK06Wytnfebv0jp9InibT6/UoHOkv4CI7nzcwIAULYL+lhjHUx 6qrKwkQBd00F+jdzwquhREEKIIhIoPrYuEI/PlXNz2km+INIVVbQP+VqbFh0YQn8 8N5Ik8qOBPxZfAbSSFYfLHWS/2BxNQJ4KpK7bdek9G+uOMppcd6R5c+d931r9xAm HOMor8dl087tT56kDGt0gASNxAniIuguN5pU/69xSeWC7/545IcNwfcXZSmBuzd+ ypoa0rict6SiVRxtVxfg61LjhSfCnkfbxbSSuIJsipvPB/4WLYF3PMDrRT+frQWI zlUr3Ithy2RAUyplC4jxuK8czV+a2Kl8iCdSJW0C1lL4BKeu/C5DSNA7ajd2dmoe T27DzHBBWqJJ3Kmy4uyRL7T8XXgh5Ut//vwKPq+JmtYesqU397CR1MPB2H+DyXGv Ubbs7yND+vMkpozn9M9+ =bsUx -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
