I have been asked to integrate Drools into an existing webapp. We are thinking about using Spring (already implemented). I have read in the Drools 4 documentation, the RuleAgent should be kept in a Singleton or JNDI or similar. i.e. from 4.0 docs "IMPORTANT: You should only have one instance of the RuleAgent per rulebase you are using. This means you should (for example) keep the agent in a singleton, JNDI (or similar). In practice most people are using frameworks like Seam or Spring - in which case they will take care of managing this for you (in fact in Seam - it is already integrated - you can inject rulebases into Seam components). Note that the RuleBase can be used multiple times by multiple threads if needed (no need to have multiple copies of it)." I have upgraded to Drools 5.0. Is the Singleton still required in 5.0 ? I cannot see any mention of it there. Has any had any experience with Drools 5.0 and Spring? Any advice? -- Regards, Ian Spence