I have not tried that. I think it can get really complicated and would not implement that manually myself. The naive idea of making the requests wait in Tomcat can quickly pile up a huge number of threads, at least in the traditional blocking one-thread-per-request model.
Rather, I’d use a traditional fail-over architecture with redundant servers, and rely on that to switch to the fail-over server while I restart the node on the primary server. But if you have that, you might as well restart the application server as a whole. n Sebastian From: binhn...@viettel.com.vn [mailto:binhn...@viettel.com.vn] Sent: Wednesday, September 12, 2012 10:14 AM To: dev@tuscany.apache.org Cc: bin...@viettel.com.vn Subject: RE: HOW TO: Hot deploy SCA service withou restart app server Hi Sebastian, That’s a great idea. But there’s one thing I worry when start/stop node. I want to pause all incoming request that call the node’s services, continue processing all current requests before stop a node. After start the node, it releases the pause automatically. Can you share your knowledge to solve it? Best regards Binh, Nguyen Thanh From: Millies, Sebastian [mailto:sebastian.mill...@softwareag.com] Sent: Wednesday, September 12, 2012 2:27 PM To: dev@tuscany.apache.org<mailto:dev@tuscany.apache.org> Subject: RE: HOW TO: Hot deploy SCA service withou restart app server it’s quite easy using the Tuscany node API. I expose the start/stop methods in an MBean interface and restart my nodes using JConsole. -- Sebastian From: Raymond Feng [mailto:enjoyj...@gmail.com] Sent: Wednesday, September 12, 2012 7:20 AM To: dev@tuscany.apache.org<mailto:dev@tuscany.apache.org> Cc: bin...@viettel.com.vn<mailto:bin...@viettel.com.vn> Subject: Re: HOW TO: Hot deploy SCA service withou restart app server At this point, a restart is required even the change only happens in the composite file as the start/stop is tied to web app context listener or servlet filter. Programmatically, you can start/stop a Tuscany node though. So you can potentially make the lifecycle of a composite application more dynamic. We did that for the OSGi enterprise services implementation based on Tuscany/SCA. Thanks, Raymond On Sep 11, 2012, at 8:51 PM, Makiet wrote: Hi, I have some interfaces and java classes, and a composite file to expose a part of those interfaces as services. One day, I want to expose one more service based on an existing interface. I mean no code change needed, only modify the composite file (I guessed). How can I achieve that without restart my app server? Best regards Binh, Nguyen Thanh IDS Scheer Consulting GmbH Geschäftsführer/Managing Directors: Michael Rehm, Ivo Totev Sitz/Registered office: Altenkesseler Straße 17, 66115 Saarbrücken, Germany - Registergericht/Commercial register: Saarbrücken HRB 19681 http://www.ids-scheer-consulting.com IDS Scheer Consulting GmbH Geschäftsführer/Managing Directors: Michael Rehm, Ivo Totev Sitz/Registered office: Altenkesseler Straße 17, 66115 Saarbrücken, Germany - Registergericht/Commercial register: Saarbrücken HRB 19681 http://www.ids-scheer-consulting.com
