Yes it is. I use multiple rule bases in a j2ee app fronted by a singleton pattern. ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of liqundu(a)aol.com Sent: Monday, 7 May 2007 11:43 PM To: rules-users(a)lists.jboss.org Subject: [rules-users] multiple rule files Hi, Does anyone know whether drools is thread safe? I need to create multiple RuleBase objects, and each loads its own rule file. Is this safe? Thanks, Liqun ________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com <http://www.aol.com?ncid=AOLAOF00020000000437> . This correspondence is for the named persons only. It may contain confidential or privileged information or both. No confidentiality or privilege is waived or lost by any mis transmission. If you receive this correspondence in error please delete it from your system immediately and notify the sender. You must not disclose, copy or relay on any part of this correspondence, if you are not the intended recipient. Any opinions expressed in this message are those of the individual sender except where the sender expressly, and with the authority, states them to be the opinions of the Department of Emergency Services, Queensland.