I am new to Drools, but am an experienced programmer. I was hoping somebody with some Drools Flow experience could advise on a good approach for dealing with the following requirements: 1) A large number of XML files are received: perhaps one every few seconds (or more frequently). Each time a file is received I want to process these according to a pre-defined business process. For example: - Calling a web service using some data contained in the file to do a calculation - Writing to a database - Copying the file to another directory - Sending an email - Logging progress NB Some of the logic in the flow may vary depending on data within the file which is being processed. 2) The business process may vary slightly depending on the nature of the file being received. For example I have four file types: A,B,C &D. I’d want to invoke 4 slightly different processes. Each of these may have slight variations depending on the contents of the file. 3) The business processes may be changed occasionally, but usually not drastically. This doesn’t need to be done dynamically. I already have code which monitors a folder for new files. With drools, I’m just not sure what the best pattern is for how to deal with this in an efficient manner. I was thinking: Each time a file is received: - Do an initial parse to determine which business process to invoke, each of these would be built as a separate drools flow - Construct the knowledgebase, session etc - Start the relevant flow I’m pretty sure this isn’t the easiest or most efficient approach though! Any thoughts? Thanks, Ken _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Whether or not a Flow is really required for what (according to your !A,B,C,D") is merely a case distinction, remains to be seen. (It might also be handled by agenda groups or similar.) Much depends on how easily you can unmarshal the XML data and create facts from the resulting objects, which will the basis for fine-grained rules firing to send email, copying, etc. -W On 3 August 2010 16:03, Kenneth May <klcmay(a)gmail.com&gt; wrote: > I am new to Drools, but am an experienced programmer. I was hoping > somebody with some Drools Flow experience could advise on a good > approach for dealing with the following requirements: > > 1) A large number of XML files are received: perhaps one every few > seconds (or more frequently). Each time a file is received I want to > process these according to a pre-defined business process. For > example: > - Calling a web service using some data contained in the file to do a > calculation > - Writing to a database > - Copying the file to another directory > - Sending an email > - Logging progress > > NB Some of the logic in the flow may vary depending on data within the > file which is being processed. > > 2) The business process may vary slightly depending on the nature of > the file being received. For example I have four file types: A,B,C > &D. I’d want to invoke 4 slightly different processes. Each of these > may have slight variations depending on the contents of the file. > > 3) The business processes may be changed occasionally, but usually not > drastically. This doesn’t need to be done dynamically. > > > I already have code which monitors a folder for new files. With > drools, I’m just not sure what the best pattern is for how to deal > with this in an efficient manner. I was thinking: > > Each time a file is received: > - Do an initial parse to determine which business process to invoke, > each of these would be built as a separate drools flow > - Construct the knowledgebase, session etc > - Start the relevant flow > > I’m pretty sure this isn’t the easiest or most efficient approach > though! Any thoughts? > > Thanks, > > Ken > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Have you looked at BPEL? http://wiki.open-esb.java.net/Wiki.jsp?page=FileBCTutorialUsingBindingWizard -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Invocation-Patterns-t... Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users