Re: Clojure & Terracotta - TIM
Hi Paul, This time I tested it under Linux, following the instructions exactly and it worked. Though when I opened the second REPL it failed with a NullPointerException. I repeated the step and had two REPLs with the same vars. For some reason it failed earlier on Windows, I will try to make it work there. Yes, I can try to help. Feel free to write me. Actually, I would like to try Clojure + Terracotta as a data layer for my Java app, so I'm more interested in adapting the changes to the latest Clojure codebase and tuning Terracotta interaction. I saw autolocking in config and now thinking how bad that can be. I will study your google document and the changes to Clojure classes to understand the TIM better. P.S. (svn rev. 1335 + the new "tim-clojure") -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure & Terracotta - TIM
Thanks for your feedback. I was able to get it to work again and pushed some minor changes to the git repo. I downloaded Terracotta 3.1.1, and followed the instructions in the tim-clojure-1.0-SNAPSHOT/example/README. I ended up uncommenting all of the code in ClojureTerracottaConfigurator.java. I believe I had commented it out, because some of the replacement classes were not necessary anymore, and I was going to trim it down to the essential replacements, but I never finished the work. The error you are experiencing might be because of one of the outstanding issues. A non-portable class cannot be used as a root binding for any Var. As I mentioned before, I have an idea for a workaround, but have not pursued it as yet. If you'd like to help, then let me know. Paul On Nov 17, 12:43 pm, Sergey Didenko wrote: > Hi Paul, > > the code from [1] does not work under the latest Terracotta (3.1.1) > with clojure-slim.jar's in the following combinations: > > 1) branch "1.0.x" from [3] > 2) branch "1.0.x" from [3] + modified > ClojureTerracottaConfigurator.java (uncommented lines) > 3) [2] svn revision 1335 + modified ClojureTerracottaConfigurator.java > (uncommented lines) > 4) [2] svn revision 1310 + modified ClojureTerracottaConfigurator.java > (uncommented lines) > > Terracotta writes messages like > > "Non-portable field name : clojure.lang.Var.root > Unshareable class : clojure.lang.XMLHandler > " > > [1]http://github.com/pjstadig/tim-clojure-1.0-snapshot > [2]http://clojure.googlecode.com/svn > [3]http://github.com/richhickey/clojure -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure & Terracotta - TIM
Hi Paul, the code from [1] does not work under the latest Terracotta (3.1.1) with clojure-slim.jar's in the following combinations: 1) branch "1.0.x" from [3] 2) branch "1.0.x" from [3] + modified ClojureTerracottaConfigurator.java (uncommented lines) 3) [2] svn revision 1335 + modified ClojureTerracottaConfigurator.java (uncommented lines) 4) [2] svn revision 1310 + modified ClojureTerracottaConfigurator.java (uncommented lines) Terracotta writes messages like "Non-portable field name : clojure.lang.Var.root Unshareable class : clojure.lang.XMLHandler " [1] http://github.com/pjstadig/tim-clojure-1.0-snapshot [2] http://clojure.googlecode.com/svn [3] http://github.com/richhickey/clojure -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure & Terracotta - TIM
Thanks for your answer, Paul! I'm certainly going to try this TIM. Another question: You say that "it requires runtime replacement of some Clojure classes" but the lines that include modified *TC.java files are commented ( see "ClojureTerracottaConfigurator.java" from "tim-clojure-1.0-snapshot" ). Does it mean that the TIM does not use modified clojure classes anymore? -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure & Terracotta - TIM
Sorry! I forgot to say this, but the short answer is: No, I would not consider it to be production ready. It may be close, but it is not production ready. Paul On Sun, Nov 15, 2009 at 2:47 PM, Sergey Didenko wrote: > Hi from a Clojure newbie! > > I have read the april thread "Clojure + Terracotta Update" and it > looks pretty positive. > > A few question for TIM users: > > Is there newer version than > http://github.com/pjstadig/tim-clojure-1.0-snapshot ? > > Are there still bugs? > > Can it be called production ready? > > Regards, Sergey. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure & Terracotta - TIM
Hey Sergey, I did the work on the Clojure TIM. I published a report of my findings at [1]. At least three of the roadblocks that I encountered were fixed in Terracotta 3.0.1 [2]. I believe the TIM works with Clojure 1.0, but it's been several months since I've looked at the code. There are still some issues with the Terracotta Integration: 1. It requires runtime replacement of some Clojure classes (which is fairly simple with Terracotta). It would be nice if these changes could be integrated into the Clojure codebase. It is daunting to think of having to maintain a set of changes that are replaced at runtime by Terracotta, but this could be done against each stable release of Clojure. 2. Currently the Clojure TIM shares all Vars, which causes a problem because the root binding of a Var can possibly be a non-portable class (such as an IO stream, or database connection...instances of these cannot meaningfully be shared across VMs). One (currently half pursued avenue) is to setup a way to share only certain Vars perhaps by adding some metadata that indicates the Var should be shared. 3. There is still a problem about how dynamically compiled classes should be shared across VMs. I believe the current TIM just permanently caches dynamically compiled classes, and they are never garbage collected. This might be a problem if many dynamically compiled classes are created, but in practice it may not be a problem depending on the circumstances. I would love to hear of people's experience using this TIM. This was an academic exercise for me and I have not pursued this much more, because I'm not using it, and I haven't heard from anyone who is using it. I'd be glad to pick back up on this work and/or to add accept contributions from others. Paul [1] http://docs.google.com/Doc?id=dg7c7v49_241g5t8tqsv [2] http://paul.stadig.name/2009/04/terracotta-bug-reports.html On Sun, Nov 15, 2009 at 2:47 PM, Sergey Didenko wrote: > Hi from a Clojure newbie! > > I have read the april thread "Clojure + Terracotta Update" and it > looks pretty positive. > > A few question for TIM users: > > Is there newer version than > http://github.com/pjstadig/tim-clojure-1.0-snapshot ? > > Are there still bugs? > > Can it be called production ready? > > Regards, Sergey. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
