Re: Clojure 1.3 amap/aset issue?
On Sun, Oct 3, 2010 at 11:26 PM, ataggart alex.tagg...@gmail.com wrote: I don't see what you're seeing for the type-hinted version: ... Perhaps you need to update your 1.3 install. Just ran lein deps on the snapshot to get the latest versions and still see the warnings: (set! *warn-on-reflection* true) ; true (defn asum-sq [ ^floats xs] (let [^floats dbl (amap xs i ret (* (aget xs i) (aget xs i)))] (areduce dbl i ret 0 (+ ret (aget dbl i) ; Reflection warning, NO_SOURCE_PATH:2 - call to aclone can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aset can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; NO_SOURCE_FILE:2 recur arg for primitive local: ret is not matching primitive, had: Object, needed: long ; Auto-boxing loop arg: ret ; Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; #'user/asum-sq Here's the 1.3.0 snapshot files: (! 520)- ls lib clojure-1.3.0-master-20101002.200208-12.jar dev standalone-1.3.0-20101002.230520-4.jar -- Sean A Corfield -- (904) 302-SEAN Railo Technologies, Inc. -- http://getrailo.com/ An Architect's View -- http://corfield.org/ If you're not annoying somebody, you're not really alive. -- Margaret Atwood -- 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: big integers in 1.2 leading to parked processes? (maybe somehow, I think)
2010/10/4 George Jahad cloj...@blackbirdsystems.net On Oct 4, 2:34 am, Lee Spector lspec...@hampshire.edu wrote: On Oct 4, 2010, at 3:58 AM, George Jahad wrote: I also look forward to the integration of CDT into Eclipse/ccw :-). Or maybe I need to migrate back to emacs, from whence I came (but was lured away by a couple nice features of eclipse/ccw...). I want to emphasize that my goal with the CDT is very definitely NOT to have it be an Emacs debugger. Emacs was first because that's what I know, (Emacs loves me and the feeling is mutual). Laurent has kindly expressed an interest in porting the CDT to CCW and I intend on supporting him to do so in the near future, (after I clean up the porting layer a bit, so he doesn't have to do it more than once.) Having said all that, the CDT is still very powerful in command line mode, with no IDE front end at all. (That is how I used it when debugging this problem, since I had to create the debugging primitives for handling Agents anyway.) So until it gets integrated with CCW, (and even afterwards,) command line mode is always an option. Yes, that's good to know. So, Lee, if I understand correctly, being able to use the CDT from CCW is just a matter of : * adding its jar file to the project's Java Build Path: Project Properties Java Build Path Libraries [ Add Jars if you copied the jar in your project | Add external Jars if the jar is not relative to Eclipse's workspace but located somewhere in the filesystem ] * starting the REPL not with Run Run as ... or the like, but with Run Debug as ... (so the JVM is started with JVM debugging options) Cheers, -- Laurent -- 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 1.3 amap/aset issue?
I don't see what you're seeing for the type-hinted version: user= (defn asum-sq [ ^floats xs ] user=* (let [ ^floats dbl (amap xs i ret user=* (* (aget xs i) user=* (aget xs i)))] user=* (areduce dbl i ret 0 user=* (+ ret (aget dbl i) NO_SOURCE_FILE:12 recur arg for primitive local: ret is not matching primitive, had: double, needed: long Auto-boxing loop arg: ret #'user/asum-sq Perhaps you need to update your 1.3 install. On Oct 3, 11:16 pm, Sean Corfield seancorfi...@gmail.com wrote: Further digging seems to indicate aset etc work for int-array types - but not float-array types? (let [^ints xii (int-array [1 2 3 4 5])] (amap xii i ret (* (aget xii i) (aget xii i (without the hint, it also works but emits various reflection warnings) On Sun, Oct 3, 2010 at 9:41 PM, Sean Corfield seancorfi...@gmail.com wrote: I'm trying out various examples in The Joy Of Clojure and I'm in Chapter 12 Performance looking at type hinting. The authors give this example: (set! *warn-on-reflection* true) ; true (defn asum-sq [xs] (let [dbl (amap xs i ret (* (aget xs i) (aget xs i)))] (areduce dbl i ret 0 (+ ret (aget dbl i) ; Reflection warning, NO_SOURCE_PATH:2 - call to aclone can't be resolved. Plus lots of others: Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aset can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. NO_SOURCE_FILE:2 recur arg for primitive local: ret is not matching primitive, had: Object, needed: long Auto-boxing loop arg: ret Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. #'user/asum-sq They claim if you use ^floats as a type hint, this will solve the problem, but here's what I get (on Clojure 1.3): (defn asum-sq [ ^floats xs ] (let [ ^floats dbl (amap xs i ret (* (aget xs i) (aget xs i)))] (areduce dbl i ret 0 (+ ret (aget dbl i) Reflection warning, NO_SOURCE_PATH:3 - call to aclone can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aset can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. NO_SOURCE_FILE:3 recur arg for primitive local: ret is not matching primitive, had: Object, needed: long Auto-boxing loop arg: ret Reflection warning, NO_SOURCE_PATH:3 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. #'user/asum-sq In other words, the same set of reflection warnings. Trying either version of asum-sq blows up tho'... (time (dotimes [_ 1] (asum-sq (float-array [1 2 3 4 5] ; IllegalArgumentException No matching method found: aset clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:77) Shouldn't it at least run, albeit slowly? Simplifying the example somewhat: (def xs (float-array [1 2 3 4 5])) ; #'user/xs (amap xs i ret (* (aget xs i) (aget xs i))) ; Reflection warning, NO_SOURCE_PATH:12 - call to aclone can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to aset can't be resolved. ; IllegalArgumentException No matching method found: aset clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:77) -- 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: relational data aggregation language
Thanks Ross, that gives me a better insight into your environment. In the online environment single cases are fetched from a database with no aggregation capability and fired at the service that contains the aggregation functionality. What does a single case consist of? Is it just a result-set (as a consequence of running an SQL query)?. Maybe an example will help. This would make sense if the IMDB query language supported the aggregations we want in a way our statisticians can use, and the IMDB is sufficiently lightweight that we can link it into our service as a function library (rather than a separate server connected by some communication protocol). I know that Apache Derby[1], HSQLDB[2] (now called HyperSQL) and H2[3] can be readily used in Clojure as in-memory databases without needing to start a server. You can find the examples here: http://bitbucket.org/kumarshantanu/clj-dbcp/src (though Clj-DBCP 0.1 is not actually released yet, expected soon with SQLRat 0.2) [1] http://db.apache.org/derby/ [2] http://hsqldb.org/ [3] http://www.h2database.com/html/main.html There are likely more in-memory databases I am not aware of at the moment. As long as they have JDBC drivers using them should be easy. Since your main criteria is SQL features/functions, I guess you would need to find out which IMDB suits better. I will be happy to add any missing bits to Clj-DBCP and SQLRat (I am the author) if you can let me know. Please feel free to ping me off the list. Regards, Shantanu On Oct 4, 4:57 pm, Ross Gayler r.gay...@gmail.com wrote: Thanks for the two posts Shantanu. The rql and Clause examples are useful, both as potential parts of a solution and as examples of how query/aggregation stuff may be done in Clojure style. It is conceivable that I may end up deciding all I need is a DSL that covers the kinds of aggregations of interest to us and translates them to SQL via SQLrat. With respect to your three suggestions in your second post - things get a bit more interesting. A major part of the problem (which I failed to emphasize/mention in my first post) is that I really want this aggregation stuff to work in two deployment environments: a batch oriented statistical development environment that we control and an online, realtime transactional environment that corporate IT controls. In the online environment single cases are fetched from a database with no aggregation capability and fired at the service that contains the aggregation functionality. We control what happens inside that service but have close to zero chance of changing anything outside that service - so in that online environment we have no possibility of putting aggregation into the datasource DB that feeds our service. However, it *might* be reasonable to put an in-memory database inside our service, purely to take advantage of the aggregation facilities provided by that IMDB. A single case would get loaded into the IMDB, the aggregation would be carried out in that IMDB, the results exported, and the IMDB cleared ready for the next case. This would make sense if the IMDB query language supported the aggregations we want in a way our statisticians can use, and the IMDB is sufficiently lightweight that we can link it into our service as a function library (rather than a separate server connected by some communication protocol). In our statistical development environment things are different. The source data happens to live in a database, and we query that to get the subset of cases we are interested in (say, 1M of them). In that subset, each case can be treated completely in isolation and our aggregations will use 100% of the component data in each case. An individual aggregation might touch 20% of the data in one case, but we might have ~500 different aggregations from the same case, so every value gets used in lots of different aggregations. So although I am interested in DB query languages as a way of specifying aggregations I am not so convinced that I would actually use a full-blown DB to implement those aggregations. Cheers Ross On Oct 4, 3:24 am, Shantanu Kumar kumar.shant...@gmail.com wrote: I looked at Tutorial D - it's pretty interesting. Here are few top-of- my-head observations: * Which RDBMS do you use? If you are free to choose a new RDBMS, probably you can pick one that provides most of the computational functionality (as SQL constructs/functions) out of the box. For example Oracle, MS SQL Server, PostgreSQL etc. The reason is performance - the more you can compute within the database, the less amount of data you will need to fetch in order to process. * The kinds of computations you need to solve look like a superset of what SQL can provide. So, I think you will have to re-state the problem in terms of computations/iterations over SQL result-sets, which is probably what you are currently doing using the imperative language. If you
Sandbar - unbound session
Hi, I've added sandbar session mgmt to my google app engine + compojure application, wrapping a stateful session around my routes configuration with: (def app (- my-routes wrap-stateful-session)) (defservice my-routes) The application compiles but I get the following error when I perform session-get or session-pu!: java.lang.IllegalStateException: Var sandbar.stateful-session/sandbar- session is unbound. Can anyone help? Thanks, Paul. -- 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 1.3 amap/aset issue?
Further digging seems to indicate aset etc work for int-array types - but not float-array types? (let [^ints xii (int-array [1 2 3 4 5])] (amap xii i ret (* (aget xii i) (aget xii i (without the hint, it also works but emits various reflection warnings) On Sun, Oct 3, 2010 at 9:41 PM, Sean Corfield seancorfi...@gmail.com wrote: I'm trying out various examples in The Joy Of Clojure and I'm in Chapter 12 Performance looking at type hinting. The authors give this example: (set! *warn-on-reflection* true) ; true (defn asum-sq [xs] (let [dbl (amap xs i ret (* (aget xs i) (aget xs i)))] (areduce dbl i ret 0 (+ ret (aget dbl i) ; Reflection warning, NO_SOURCE_PATH:2 - call to aclone can't be resolved. Plus lots of others: Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aset can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. NO_SOURCE_FILE:2 recur arg for primitive local: ret is not matching primitive, had: Object, needed: long Auto-boxing loop arg: ret Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. #'user/asum-sq They claim if you use ^floats as a type hint, this will solve the problem, but here's what I get (on Clojure 1.3): (defn asum-sq [ ^floats xs ] (let [ ^floats dbl (amap xs i ret (* (aget xs i) (aget xs i)))] (areduce dbl i ret 0 (+ ret (aget dbl i) Reflection warning, NO_SOURCE_PATH:3 - call to aclone can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aset can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. NO_SOURCE_FILE:3 recur arg for primitive local: ret is not matching primitive, had: Object, needed: long Auto-boxing loop arg: ret Reflection warning, NO_SOURCE_PATH:3 - call to alength can't be resolved. Reflection warning, NO_SOURCE_PATH:3 - call to aget can't be resolved. #'user/asum-sq In other words, the same set of reflection warnings. Trying either version of asum-sq blows up tho'... (time (dotimes [_ 1] (asum-sq (float-array [1 2 3 4 5] ; IllegalArgumentException No matching method found: aset clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:77) Shouldn't it at least run, albeit slowly? Simplifying the example somewhat: (def xs (float-array [1 2 3 4 5])) ; #'user/xs (amap xs i ret (* (aget xs i) (aget xs i))) ; Reflection warning, NO_SOURCE_PATH:12 - call to aclone can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:12 - call to aset can't be resolved. ; IllegalArgumentException No matching method found: aset clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:77) -- 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: Sandbar - unbound session
Managed to solve my own problem. For anyone with the same problem in the future, here is the corrected code: (defservice (- my-routes wrap-stateful-session)) and remove the (def app) line. P. On Oct 4, 10:27 am, Paul paul_bow...@yahoo.com wrote: Hi, I've added sandbar session mgmt to my google app engine + compojure application, wrapping a stateful session around my routes configuration with: (def app (- my-routes wrap-stateful-session)) (defservice my-routes) The application compiles but I get the following error when I perform session-get or session-pu!: java.lang.IllegalStateException: Var sandbar.stateful-session/sandbar- session is unbound. Can anyone help? Thanks, Paul. -- 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: big integers in 1.2 leading to parked processes? (maybe somehow, I think)
On Oct 4, 2:34 am, Lee Spector lspec...@hampshire.edu wrote: On Oct 4, 2010, at 3:58 AM, George Jahad wrote: I also look forward to the integration of CDT into Eclipse/ccw :-). Or maybe I need to migrate back to emacs, from whence I came (but was lured away by a couple nice features of eclipse/ccw...). I want to emphasize that my goal with the CDT is very definitely NOT to have it be an Emacs debugger. Emacs was first because that's what I know, (Emacs loves me and the feeling is mutual). Laurent has kindly expressed an interest in porting the CDT to CCW and I intend on supporting him to do so in the near future, (after I clean up the porting layer a bit, so he doesn't have to do it more than once.) Having said all that, the CDT is still very powerful in command line mode, with no IDE front end at all. (That is how I used it when debugging this problem, since I had to create the debugging primitives for handling Agents anyway.) So until it gets integrated with CCW, (and even afterwards,) command line mode is always an option. -- 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: big integers in 1.2 leading to parked processes? (maybe somehow, I think)
Using the CDT I was able to confirm that one of the agents actually is generating a run time exception, trying to cast an int from a long. Could the perturb function be calling rand-int with a value that is too large? I'm including the stack trace below in case that helps. This is line 950 in RT.java: throw new IllegalArgumentException(Value out of range for int: + x); user= (print-frames) 0 clojure.lang.RT intCast [x] RT.java:950 1 clojure.lang.RT intCast [x] RT.java:922 2 clojure.core$rand_int invoke [this n] core.clj:3821 3 clojush$perturb invoke [this z denom atom-generators safe-denom i points pgm zipper] regression.clj:280 4 clojush$fn__1071 invoke [this state] regression.clj:290 5 clojush$execute_instruction invoke [this literal-type instruction state] clojush.clj:1282 6 clojush$eval_push invoke [this iteration state exec-top s print] clojush.clj:1300 7 clojush$run_push invoke [this state print code s] clojush.clj:1319 8 clojush$run_push invoke [this state code] clojush.clj:1312 9 clojush$eval1080$fn__1083$iter__1084__1088$fn__1089$fn__1090 invoke [this b--1087 size--4062--auto-- program c--4061--auto-- i--1086 input] regression.clj:310 10 clojush$eval1080$fn__1083$iter__1084__1088$fn__1089 invoke [this program iter--1084 s--1085 size--4062--auto--1095 temp--3589-- auto--1097 c--4061--auto--1094 b--1087] regression.clj:306 11 clojure.lang.LazySeq sval [this] LazySeq.java:42 12 clojure.lang.LazySeq seq [this] LazySeq.java:56 13 clojure.lang.RT seq [coll] RT.java:450 14 clojure.core$seq invoke [this coll] core.clj:122 15 clojure.core$dorun invoke [this coll] core.clj:2450 16 clojure.core$doall invoke [this coll] core.clj:2465 17 clojush$eval1080$fn__1083 invoke [this program] regression.clj:306 18 clojush$evaluate_individual invoke [this error-function i] clojush.clj:1455 19 clojure.lang.AFn applyToHelper [arglist a1 ifn] AFn.java:165 20 clojure.lang.AFn applyTo [this arglist] AFn.java:151 21 clojure.lang.Agent$Action doRun [action oldval error] Agent.java: 100 22 clojure.lang.Agent$Action run [this] Agent.java:150 23 java.util.concurrent.ThreadPoolExecutor$Worker runTask [] ThreadPoolExecutor.java:886 24 java.util.concurrent.ThreadPoolExecutor$Worker run [] ThreadPoolExecutor.java:908 25 java.lang.Thread run [] Thread.java:637 On Oct 3, 5:07 pm, Lee Spector lspec...@hampshire.edu wrote: On Oct 3, 2010, at 7:16 PM, Lee Spector wrote: I've just done a couple of runs verifying that this happens when using the exact same code in 1.1 and 1.2. (Previously the code I was running under the different versions varied slightly, but now I'm using exactly the same code.) If anyone feels like trying it themselves -- that would be wonderful -- the code is athttp://hampshire.edu/lspector/gptp10/autopush-gptp10-code.zip Open the regression.clj file in success-12, scroll to the bottom, decrease the :population-size parameter near the bottom the file from 10 to 1000 (just so it goes through generations faster), and then run that file (which will load clojush.clj). Under 1.2 this generally hangs within a couple dozen generations for me... sometimes a little longer. (In case this could matter I'm running under Mac OS X in Eclipse/Counterclockwise, with the most recent versions of everything.) Under 1.1 it runs through at least several hundred generations without error or hanging until I stop it. (It's unlikely with these parameters but it's possible it would stop earlier because it found a solution -- then it would say Success!.) If anyone does this please note that I do know that the code in that file is TERRIBLE, AWFUL, unidiomatic clojure code. I was still new(er) to clojure when I wrote it. My more recent versions are improved in several ways -- some of that is athttp://github.com/lspector/Clojush-- but since I wanted code that ran in 1.1 I'm using this old version to track down this problem. -Lee -- Lee Spector, Professor of Computer Science School of Cognitive Science, Hampshire College 893 West Street, Amherst, MA 01002-3359 lspec...@hampshire.edu,http://hampshire.edu/lspector/ Phone: 413-559-5352, Fax: 413-559-5438 Check out Genetic Programming and Evolvable Machines:http://www.springer.com/10710-http://gpemjournal.blogspot.com/ -- 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: relational data aggregation language
Thanks for the two posts Shantanu. The rql and Clause examples are useful, both as potential parts of a solution and as examples of how query/aggregation stuff may be done in Clojure style. It is conceivable that I may end up deciding all I need is a DSL that covers the kinds of aggregations of interest to us and translates them to SQL via SQLrat. With respect to your three suggestions in your second post - things get a bit more interesting. A major part of the problem (which I failed to emphasize/mention in my first post) is that I really want this aggregation stuff to work in two deployment environments: a batch oriented statistical development environment that we control and an online, realtime transactional environment that corporate IT controls. In the online environment single cases are fetched from a database with no aggregation capability and fired at the service that contains the aggregation functionality. We control what happens inside that service but have close to zero chance of changing anything outside that service - so in that online environment we have no possibility of putting aggregation into the datasource DB that feeds our service. However, it *might* be reasonable to put an in-memory database inside our service, purely to take advantage of the aggregation facilities provided by that IMDB. A single case would get loaded into the IMDB, the aggregation would be carried out in that IMDB, the results exported, and the IMDB cleared ready for the next case. This would make sense if the IMDB query language supported the aggregations we want in a way our statisticians can use, and the IMDB is sufficiently lightweight that we can link it into our service as a function library (rather than a separate server connected by some communication protocol). In our statistical development environment things are different. The source data happens to live in a database, and we query that to get the subset of cases we are interested in (say, 1M of them). In that subset, each case can be treated completely in isolation and our aggregations will use 100% of the component data in each case. An individual aggregation might touch 20% of the data in one case, but we might have ~500 different aggregations from the same case, so every value gets used in lots of different aggregations. So although I am interested in DB query languages as a way of specifying aggregations I am not so convinced that I would actually use a full-blown DB to implement those aggregations. Cheers Ross On Oct 4, 3:24 am, Shantanu Kumar kumar.shant...@gmail.com wrote: I looked at Tutorial D - it's pretty interesting. Here are few top-of- my-head observations: * Which RDBMS do you use? If you are free to choose a new RDBMS, probably you can pick one that provides most of the computational functionality (as SQL constructs/functions) out of the box. For example Oracle, MS SQL Server, PostgreSQL etc. The reason is performance - the more you can compute within the database, the less amount of data you will need to fetch in order to process. * The kinds of computations you need to solve look like a superset of what SQL can provide. So, I think you will have to re-state the problem in terms of computations/iterations over SQL result-sets, which is probably what you are currently doing using the imperative language. If you can split every problem in terms of (a) computation you need versus (b) SQL queries you need to fire, then you can easily do it using Clojure itself without needing any DSL. * If you want a DSL for this, I suppose it should make maximum use of the database's inbuilt query functions/constructs to maximize performance. This also means the DSL implementation needs to be database-aware. Secondly, it is possible to write functions in Clojure that would emit appropriate SQL clauses (as long as it is doable) to compute certain pieces of information. Looking at multiple use cases (covering various aspects - fuzzy vs deterministic) will be helpful. Regards, Shantanu On Oct 3, 5:10 pm, Shantanu Kumar kumar.shant...@gmail.com wrote: On Oct 3, 1:16 pm, Ross Gayler r.gay...@gmail.com wrote: Thanks Michael. This sounds very similar to NoSQL and Map/Reduce? I'm not so sure about that (which may be mostly due to my ignorance of NoSQL and Map/Reduce). The amount of data involved in my problem is quite small and any infrastructure aimed at massive scaling may bring a load of conceptual and implementation baggage that is unnecessary/ unhelpful. Let me restate my problem: I have a bunch of statistician colleagues with minimal programming skills. (I am also a statistician, but with slightly better programming skills.) As part of our analytical workflow we take data sets and preprocess them by adding new variables that are typically aggregate functions of other values. We source the data form a database/file, add the new variables, and store the augmented
Re: Clojure 1.3 amap/aset issue?
BTW, having updated to the latest snapshot, when I press ctl-D in the repl, I get this exception: user= Exception in thread Thread-4 java.lang.RuntimeException: java.lang.IndexOutOfBoundsException at clojure.lang.AFn.run(AFn.java:28) at java.lang.Thread.run(Thread.java:613) Caused by: java.lang.IndexOutOfBoundsException at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:132) at java.io.OutputStreamWriter.write(OutputStreamWriter.java:191) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:90) at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28) at leiningen.repl$copy_out_loop.invoke(repl.clj:56) at leiningen.repl$connect_to_server$fn__823.invoke(repl.clj:74) at clojure.lang.AFn.run(AFn.java:24) ... 1 more On Sun, Oct 3, 2010 at 11:32 PM, Sean Corfield seancorfi...@gmail.com wrote: On Sun, Oct 3, 2010 at 11:26 PM, ataggart alex.tagg...@gmail.com wrote: I don't see what you're seeing for the type-hinted version: ... Perhaps you need to update your 1.3 install. Just ran lein deps on the snapshot to get the latest versions and still see the warnings: -- 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
evaluation of a function via clojure ...
Hello everybody, I am trying to use clojure along with mathematica. Thanks to Clojuratica, the integration is seamless.. when I try to execute the following code (math (SetDelayed (func1 (Pattern x (Blank))) (With [f 10 g 20] (* f (+ g x) (math (func1 30)) I got (ClojurianScopes/With [f 10 g 20] (* f (+ 30 g))) and when I evaluated (math (Set (func2 (Pattern x (Blank))) (With [f 10 g 20] (* f (+ g x) (math (func2 30)) I got ... (ClojurianScopes/With [f 10 g 20] (* f (+ 30 g))) Adding N/Simplify did not make any difference.. I was expecting 500 in both of those tries.. Can anybody help? Sunil. -- 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
evaluation of a function via mathematica from clojure using the clojuratica bridge...
I am sorry for reposting .. I realized that the subject line was not very intelligible .. so I am changing the subject line and reposting the same message. Hello everybody, I am trying to use clojure along with mathematica. Thanks to Clojuratica, the integration is seamless.. when I try to execute the following code *(math (SetDelayed (func1 (Pattern x (Blank)))* *(With [f 10 g 20]* * (* f (+ g x)* *(math (func1 30))* I got *(ClojurianScopes/With [f 10 g 20] (* f (+ 30 g)))* and when I evaluated *(math (Set (func2 (Pattern x (Blank)))* *(With [f 10 g 20]* * (* f (+ g x)* * * *(math (func2 30))* I got ... *(ClojurianScopes/With [f 10 g 20] (* f (+ 30 g)))* Adding N/Simplify did not make any difference.. I was expecting 500 in both of those tries.. Can anybody help? Sunil. -- 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
International Lisp Conference 2010 - Update
With the usual apologies to those who receive multiple copies. This version contains the schedules of presentations and tutorials. ~~~ International Lisp Conference 2010 October 19-21, 2010 John Ascuaga's Nugget (Casino) Reno/Sparks, Nevada, USA (near Lake Tahoe) Collocated with SPLASH 2010 (OOPSLA DLS more) see also http://splashcon.org as well as http://www.dynamic-languages-symposium.org/dls-10/ In association with ACM SIGPLAN ~~~ The Association of Lisp Users is pleased to announce the 2010 International Lisp Conference, to be held in Reno, Nevada, in collocation with SPLASH 2010. This year's program consists of tutorials for beginners and advanced users, a selection of prominent invited speakers, an excellent technical session, lightning talks and an open forum. All ILC and other SPLASH co-located registrants have free admittance to the ILC tutorials. Note that these tutorials are double-tracked across from the early-morning SPLASH keynote addresses. Schedule: ~ See also http://www.international-lisp-conference.org/2010/schedule Tuesday, October 19 ~~~ ILC tutorial: Ernst van Waning Introduction to Common Lisp, part 1 SPLASH keynote: Stephanie Forrest The Case for Evolvable Software ILC invited speaker: Dr. Lawrence Hunter Building a Mind for Life ILC invited speaker: Jans Aasman AllegroGraph and the Linked Open Data Cloud Hannes Mehnert Extending Dylan's Type System for Better Type Inference and Error Detection Shingo Yuasa and Masahiro Yasugi Validating Low-Level Instructions for Fixnums using BDDs Roy Turner LP/Lisp: Literate Programming for Lisp Francois-Rene Rideau and Robert Goldman ASDF 2: Evolving an API to Improve Social Interactions Wednesday, October 20 ~ ILC tutorial: Ernst van Waning Introduction to Common Lisp, part 2 ILC tutorial: David Margolies AllegroGraph, Lisp for a NoSQL World SPLASH keynote: Benjamin C. Pierce Art, Science, and Fear ILC invited speaker: Marc Feeley Gambit Scheme: Inside Out ILC invited speaker: Peter Seibel Common Lisp Standardization: The Good, the Bad, and the Ugly Tomoharu Ugawa, Hideya Iwasaki, and Taiichi Yuasa Starvation-free Heap Size for Replication-Based Incremental Compacting Garbage Collection John Maraist NST: A unit testing system for Common Lisp ALU meeting Thursday, October 21 ILC tutorial: Introduction to Common Lisp, part 3 SPLASH keynote: Kenneth Stanley Searching Without Objectives ILC Invited speaker: Lowell Hawkinson Lisp for Breakthrough Products ILC Invited speaker and SPLASH keynote: Don Syme F#: Taking Succinct, Efficient, Typed Functional Programming into the Mainstream Didier Verna CLon, the Command-Line Option Nuker Masahiro Yasugi, Tsuneyasu Komiya, Tasuku Hiraishi and Seiji Umatani Managing Continuations for Proper Tail Recursion Lightning talks and open forum Conference Registration: Due to colocation, registration must be done using ILC/SPLASH'10 unified registration forms available at http://splashcon.org Please note that the registration page (page 3) has the option SPLASH (OOPSLA/Onward!) selected by default. If you are only planning to attend ILC, don't forget to deselect that option. Travel and Accommodation: ~ SouthWest Airlines offers low fares into Reno but requires booking online at www.southwest.com John Ascuaga's Nugget offers reduced rates for ILC participants; see http://splashcon.org to obtain the group code; or you can have your travel agent look for best bookings (e.g. priceline.com) Scope: ~~ Lisp is one of the greatest ideas from computer science and a major influence for almost all programming languages and all sufficiently complex software applications. The International Lisp Conference is a forum for the discussion of Lisp and, in particular, the design, implementation and application of any of the Lisp dialects. We encourage everyone interested in Lisp to participate. Organizing Committee: ~ * General Chair: JonL White - The Ginger IceCream Factory of Palo Alto, ALU * Program Chair: Antonio Leitao - Instituto Superior Tecnico/INESC-ID * Conference Treasurer: Duane Rettig - Franz, Inc., ALU Director * Publicity Chair: Daniel Herring - ALU Director * ALU Treasurer: Rusty Johnson - TASC, Inc., ALU Director Program Committee: ~~ * Antonio Leitao - Instituto Superior Tecnico/INESC-ID, Portugal * Alex Fukunaga - University of Tokyo, Japan * Charlotte
Re: big integers in 1.2 leading to parked processes? (maybe somehow, I think)
On Oct 4, 2010, at 3:58 AM, George Jahad wrote: Using the CDT I was able to confirm that one of the agents actually is generating a run time exception, trying to cast an int from a long. Could the perturb function be calling rand-int with a value that is too large? I'm including the stack trace below in case that helps. Thank you George! I think this will solve my current problem although I wonder if this points to some issues with agent error handling that deserve more attention. FWIW I had noticed that the exception you found could occur, and in my most recent code I have an alternative to rand-int that includes this: (if (= (type n) java.lang.Integer) (. thread-local-random-generator (nextInt n)) (. thread-local-random-generator (nextInt 2147483647) ;; biggest java.lang.Integer BUT I foolishly forgot to change the call to rand-int in perturb to use this alternative, so I was still calling rand-int with something that wasn't a java.lang.Integer and that seems like it is indeed the source of the trouble. I still don't understand why everything continues to chug merrily along in 1.1 when I hit this error (although other errors in agents would produce a message saying that the agent had errors -- not specific but at least something), why 1.2 hangs without comment (shouldn't the exception produce some sort of feedback?), or why I couldn't find a trace of the exception in the Eclipse debugger. Setting aside the 1.1 mystery for now -- since it's just history anyway -- is there a rationale for silencing exceptions in agents and just having calls to await hang without comment? I'm not sure what I think should happen in terms of continued processing, but it sure would be nice to know that an exception occurred and to be shown the details. I also look forward to the integration of CDT into Eclipse/ccw :-). Or maybe I need to migrate back to emacs, from whence I came (but was lured away by a couple nice features of eclipse/ccw...). Thanks George especially for running the code to diagnose this. It was tricky because the bignums only arise in certain situations, although here there is actually selection pressure for bignums since bigger arguments to perturb increase replication accuracy. -Lee -- 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
Correct place to put human understandable tests
I write a search application, and to test it I need some util functions such as test-search to run and see the result. I.e. this function cannot be created as unit test - there's just no one correct answer, and only human can understand it. So, test directory is not the place to put such functions to. Another way is to put them into source code files itself. But 1) they are not related to the file itself, and I don't want them to be compiled or loaded at runtime; 2) in these tests for simplicity I use absolute paths for resources on my disk, and if they will be included in production version, namespaces may fail to be loaded. So, the question is: what is the most appropriate place to put such human understandable tests to? -- 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
ANN: Clj-DBCP 0.1 - Database Connection Pooling
Hi, I just pushed Clj-DBCP 0.1 to Clojars. It is a Java-6/Clojure wrapper for the Apache DBCP library. Besides exposing the creation of connection-pooled datasource, the wrapper also provides API for embedding databases (in-memory, filesystem, network) such as Apache Derby, HSQLDB/HyperSQL and H2. Project page/Tutorial: http://bitbucket.org/kumarshantanu/clj-dbcp/src Clojars: http://clojars.org/org.bituf/clj-dbcp Index: http://code.google.com/p/bitumenframework/ Discussion: http://groups.google.com/group/bitumenframework Comments, feedback and contribution are welcome. Regards, Shantanu -- 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: lispy ways of handling dev mode
On Sat, Oct 2, 2010 at 22:46, Scott Jaderholm jaderh...@gmail.com wrote: On Sat, Oct 2, 2010 at 6:36 PM, Michael Ossareh ossa...@gmail.com wrote: What is the recommended manner in which to let your application know its on a dev machine? I use an environment variable that determines which config (dev, production, test) gets loaded. APPNAME_CONFIG=development lein swank I don't know if it has issues in war deployments or such, I haven't done them. If someone knows of problems with this approach I'd be curious to hear them. I ended up using (load-script) - it's the grungy solution in just the right way :) It gives me a config namespace, is read from arbitrary locations (provided by a command line argument) and it contains clojure forms. -- 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: ANN: SQLRat - A Clojure 1.2 library to access Relational Databases using DataTypes
Shantanu--- This looks great! Can you compare it to ClojureQL? Is it attempting to do more or less the same thing? (Not sure what is happening with ClojureQL right now.) Thanks, Nick. On Aug 31, 1:19 pm, Shantanu Kumar kumar.shant...@gmail.com wrote: SQLRat 0.1 GA is pushed to Clojars. Maven/Lein details here:http://clojars.org/org.bituf/sqlrat The same is also reflected here:http://code.google.com/p/bitumenframework/ # Changes and TODO ## 0.2 / planned - [TODO] Support large sized query result-sets (by adding lazy loading option) - [TODO] Optimistic locks using time stamps - [TODO] DSL for the WHERE clause - [] Add :groupby and :orderby arguments to find-xxx functions ## 0.1 / 2010-Aug-31 (GMT + 5:30) - Entity definitions, meta data, relations - CRUD (Create, Retrieve, Update, Delete) functions for entities - Small-to-medium sized query result-sets (eager-fetching is the only option) - Query by COUNT(*) function - User can specify columns, WHERE clause in retrieve functions - CRUD (Create, Retrieve, Update, Delete) functions for entity- relations - Avoid N+1 Select Feel free to kick the tires and do share your experience/impression. Regards, Shantanu On Aug 18, 11:38 pm, Shantanu Kumar kumar.shant...@gmail.com wrote: Hi, I have uploaded source code (Apache 2 license) forSQLRat- a library for Clojure 1.2 to access relational databases using DataTypes (entities). It also lets you define relations between entities and navigate them. While this is a part of what typically Object- Relational Mapping (ORM) frameworks do, it is not an ORM framework per se -- it does not implement State managent, Identity management, Lazy loading, Eager fetching etc. The code is quite rough around the edges right now and beta-quality at best (at 0.1-SNAPSHOT), but it works nevertheless. I intend to release it as GA soon after Clojure 1.2 goes GA too. The source code is here:http://bitbucket.org/kumarshantanu/sqlrat/ Discussions can be posted here:http://groups.google.com/group/bitumenframework You may also like to keep a tab at this:http://code.google.com/p/bitumenframework/ The intent of this announcement is to gather feedback, so that I can fix as many warts as I can before doing a 0.1 GA release. It is not on Clojars yet, but the GA will eventually be there. The most important parts to review would be the API it exposes, followed by the implementation details. So, I would request you to give the library a try, ask questions (I would be happy to answer), give feedback, make suggestions and if you can, fork and contribute as well. The usage can be found in the dbblog.clj file, which contains the unit tests and describes how the library can be used. Regards, Shantanu -- 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 1.3 amap/aset issue?
Not sure, but I suspect 'lein deps' doesn't kill your local maven cache, so you might not actually be getting the latest jar off the server. cake has a 'cake deps force' precisely to deal with this issue. On Oct 3, 11:32 pm, Sean Corfield seancorfi...@gmail.com wrote: On Sun, Oct 3, 2010 at 11:26 PM, ataggart alex.tagg...@gmail.com wrote: I don't see what you're seeing for the type-hinted version: ... Perhaps you need to update your 1.3 install. Just ran lein deps on the snapshot to get the latest versions and still see the warnings: (set! *warn-on-reflection* true) ; true (defn asum-sq [ ^floats xs] (let [^floats dbl (amap xs i ret (* (aget xs i) (aget xs i)))] (areduce dbl i ret 0 (+ ret (aget dbl i) ; Reflection warning, NO_SOURCE_PATH:2 - call to aclone can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aset can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; NO_SOURCE_FILE:2 recur arg for primitive local: ret is not matching primitive, had: Object, needed: long ; Auto-boxing loop arg: ret ; Reflection warning, NO_SOURCE_PATH:2 - call to alength can't be resolved. ; Reflection warning, NO_SOURCE_PATH:2 - call to aget can't be resolved. ; #'user/asum-sq Here's the 1.3.0 snapshot files: (! 520)- ls lib clojure-1.3.0-master-20101002.200208-12.jar dev standalone-1.3.0-20101002.230520-4.jar -- Sean A Corfield -- (904) 302-SEAN Railo Technologies, Inc. --http://getrailo.com/ An Architect's View --http://corfield.org/ If you're not annoying somebody, you're not really alive. -- Margaret Atwood -- 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: Is ClojureCLR converging toward a release?
David, Rich: any further updates on this? Mike On Sep 24, 8:24 am, dmiller dmiller2...@gmail.com wrote: Just waiting for that person's CA to be processed by Rich. -- 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: ANN: SQLRat - A Clojure 1.2 library to access Relational Databases using DataTypes
On Oct 5, 2:42 am, nchubrich nchubr...@gmail.com wrote: Shantanu--- This looks great! Can you compare it to ClojureQL? Is it attempting to do more or less the same thing? (Not sure what is happening with ClojureQL right now.) Thanks, Nick. From what I understood after reading the blog post[1] and the sources[2], ClojureQL builds a Clojure-oriented query language for doing database stuff - the ClojureQL queries you write don't need to change when you change the database. I think roughly speaking ClojureQL is like Hibernate's HQL (plus query optimization - prepared statements). On the contrary SQLRat does not try to build a common language to talk to all databases - you rather use SQL clauses that can be readily understood by the database. I guess ClojureQL is to SQLRat what Hibernate/HQL is to SpringJDBC+primitive_O/R_mapping. SQLRat uses the concept of database entities - entities can be related to other entities and SQLRat provides API around that. I created SQLRat considering the typical workflow for Domain Driven Design and I was careful to avoid the abstraction-leakiness (that's why didn't consider state management or entity-identity management). My attempt is to pick the good parts of O/R mapping (as per my experience) and put them into SQLRat. ClojureQL does not deal with entities AFAICT. So, the question is -- is SQLRat doing more or less the same thing as ClojureQL? Partly yes, but mostly no. There are big parts in both SQLRat and ClojureQL that are orthogonal, and if ClojureQL can provide database-agnostic query language at an SQL-clause level (maybe it already does, I am not sure) rather than constructing only complete queries I think SQLRat and ClojureQL can be a good combination for doing database stuff. By the way, SQLRat 0.2 (release expected very soon) will have an SQL- clause API[3] that is like Clojure DSL for SQL but then the intent is not to enable database-agnostic querying there. [1] http://www.bestinclass.dk/index.clj/2009/12/clojureql-where-are-we-going.html [2] git://gitorious.org/clojureql/clojureql.git [3] http://bitbucket.org/kumarshantanu/sqlrat/wiki/Clause Regards, Shantanu Thanks, Nick. On Aug 31, 1:19 pm, Shantanu Kumar kumar.shant...@gmail.com wrote: SQLRat 0.1 GA is pushed to Clojars. Maven/Lein details here:http://clojars.org/org.bituf/sqlrat The same is also reflected here:http://code.google.com/p/bitumenframework/ # Changes and TODO ## 0.2 / planned - [TODO] Support large sized query result-sets (by adding lazy loading option) - [TODO] Optimistic locks using time stamps - [TODO] DSL for the WHERE clause - [] Add :groupby and :orderby arguments to find-xxx functions ## 0.1 / 2010-Aug-31 (GMT + 5:30) - Entity definitions, meta data, relations - CRUD (Create, Retrieve, Update, Delete) functions for entities - Small-to-medium sized query result-sets (eager-fetching is the only option) - Query by COUNT(*) function - User can specify columns, WHERE clause in retrieve functions - CRUD (Create, Retrieve, Update, Delete) functions for entity- relations - Avoid N+1 Select Feel free to kick the tires and do share your experience/impression. Regards, Shantanu On Aug 18, 11:38 pm, Shantanu Kumar kumar.shant...@gmail.com wrote: Hi, I have uploaded source code (Apache 2 license) forSQLRat- a library for Clojure 1.2 to access relational databases using DataTypes (entities). It also lets you define relations between entities and navigate them. While this is a part of what typically Object- Relational Mapping (ORM) frameworks do, it is not an ORM framework per se -- it does not implement State managent, Identity management, Lazy loading, Eager fetching etc. The code is quite rough around the edges right now and beta-quality at best (at 0.1-SNAPSHOT), but it works nevertheless. I intend to release it as GA soon after Clojure 1.2 goes GA too. The source code is here:http://bitbucket.org/kumarshantanu/sqlrat/ Discussions can be posted here:http://groups.google.com/group/bitumenframework You may also like to keep a tab at this:http://code.google.com/p/bitumenframework/ The intent of this announcement is to gather feedback, so that I can fix as many warts as I can before doing a 0.1 GA release. It is not on Clojars yet, but the GA will eventually be there. The most important parts to review would be the API it exposes, followed by the implementation details. So, I would request you to give the library a try, ask questions (I would be happy to answer), give feedback, make suggestions and if you can, fork and contribute as well. The usage can be found in the dbblog.clj file, which contains the unit tests and describes how the library can be used. Regards, Shantanu -- 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
Re: [ANN] appengine-magic: using Clojure with Google App Engine
On 21 September 2010 07:15, Constantine Vetoshev gepar...@gmail.com wrote: I'd like to announce the release of a working version of appengine- magic, a library designed to make it easier to get started with Google App Engine using Clojure. .. chop .. I noticed it uses ring out of the box. I was wondering if this is compatible with compojure? There also seems to be a compojure-gae project floating around so I'm a little confused as to which project I should be using. Regards, Glen -- 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
