I found out the reason why CDT 1.4.0a startup failed on Windows 7 but encountered yet another problem

[philos99]

First of all, the following is my clojure programming environment on Windows 7.

C:\work\lab\myproject> lein version
Leiningen 1.6.3-SNAPSHOT on Java 1.7.0_01 Java HotSpot(TM) Client VM

My first project.clj is as follows.

(defproject myproject "1.0.0-SNAPSHOT"
  :description "FIXME: write description"
  :dependencies [[org.clojure/clojure "1.3.0"]]
  :dev-dependencies [[swank-clojure "1.4.0-SNAPSHOT"]
                     [clojure-source "1.3.0-alpha5"]]
  :jvm-opts ["-agentlib:jdwp=transport=dt_socket,server=y,suspend=n"]
  :extra-classpath-dirs ["C:\\usr\\lang\\java\\jdk\\lib\\tools.jar"])

I typed the next command on the console.

C:\work\lab\myproject> lein swank
Listening for transport dt_socket at address: 50649
Connection opened on localhost port 4005.

The following is the content of src/myproject/core.clj.

;; src/myproject/core.clj
(ns myproject.core)

(defn my-add [a b]
  (+ a b))

After typing M-x slime-connect on Emacs, I tried the following.

user> (use 'myproject.core)
nil

user> (my-add 10 20)
30

user> (use 'swank.cdt)
warning: unabled to add tools.jar to classpath. This may cause CDT initialization to fail.
CDT  1.4.0a startup failed:  #<RuntimeException java.lang.RuntimeException: java.io.IOException: no providers installed>
nil

At this time, my console shows the next message.

C:\work\lab\myproject> lein swank
Listening for transport dt_socket at address: 50649
Connection opened on localhost port 4005.
java.util.ServiceConfigurationError: com.sun.tools.attach.spi.AttachProvider: Pr
ovider sun.tools.attach.WindowsAttachProvider could not be instantiated: java.la
ng.UnsatisfiedLinkError: no attach in java.library.path

I searched the Internet for the solution hint and found the clue on the site http://www.coderanch.com/t/377174/java/java/java-library-path

So I inserted the next newly added line on the project.clj, because the attach.dll was in the folder C:\usr\lang\java\jdk\jre\bin.

(defproject myproject "1.0.0-SNAPSHOT"
  :description "FIXME: write description"
  :dependencies [[org.clojure/clojure "1.3.0"]]
  :dev-dependencies [[swank-clojure "1.4.0-SNAPSHOT"]
                     [clojure-source "1.3.0-alpha5"]]
  :jvm-opts ["-agentlib:jdwp=transport=dt_socket,server=y,suspend=n"
             "-Djava.library.path=C:\\usr\\lang\\java\\jdk\\jre\\bin"] ;; <== newly added line
  :extra-classpath-dirs ["C:\\usr\\lang\\java\\jdk\\lib\\tools.jar"])

And then I restarted lein swank and had the next result.

user> (use 'myproject.core)
nil

user> (my-add 10 20)
30

user> (use 'swank.cdt)
warning: unabled to add tools.jar to classpath. This may cause CDT initialization to fail.
Clearing CDT event requests and continuing.
Swank CDT release 1.4.0a started
nil

And I confirmed on the console that swank.cdt successfully started on Windows 7.

C:\work\lab\myproject> lein swank
Listening for transport dt_socket at address: 53044
Connection opened on localhost port 4005.
CDT ready

This is the solution I found out about the Swank startup failure on Windows 7.

However I met another unexpected problem.

;; This doesn't work
user> (set-bp my-add)
No message.
  [Thrown class java.lang.NullPointerException]

user> (print-bps)
nil


;; This seems to work, but I'm not sure of it
;; because of the next message on Minibuffer.
user> (set-bp myproject.core/my-add)
nil
nil

;; The message on Minibuffer at this time
;; error in process filter: Wrong number of arguments: nil, 2

user> (print-bps)
0 myproject.core/my-add
nil

Anyway I continues my experiment as follows.

user> (my-add 20 30)

And then the next window titled sldb clojure/2 showed up.

CDT BreakpointEvent in thread Swank REPL Thread
From here you can: e/eval, v/show source, s/step, x/next, o/exit func

Restarts:
 0: [QUIT] Quit to the SLIME top level

Backtrace:
  0: myproject.core$my_add.invoke(core.clj:3)
  1: user$eval2732.invoke(NO_SOURCE_FILE:1)
  2: clojure.lang.Compiler.eval(Compiler.java:6465)
  3: clojure.lang.Compiler.eval(Compiler.java:6431)
  4: clojure.core$eval.invoke(core.clj:2795)
  5: swank.core$eval680$fn__681.invoke(core.clj:409)
  6: clojure.lang.MultiFn.invoke(MultiFn.java:163)
  7: swank.commands.basic$eval_region.invoke(basic.clj:48)
  8: swank.commands.basic$eval_region.invoke(basic.clj:38)
  9: swank.commands.basic$eval901$listener_eval__902.invoke(basic.clj:72)
 10: clojure.lang.Var.invoke(Var.java:401)
 11: user$eval2730.invoke(NO_SOURCE_FILE)
 12: clojure.lang.Compiler.eval(Compiler.java:6465)
 13: clojure.lang.Compiler.eval(Compiler.java:6431)
 14: clojure.core$eval.invoke(core.clj:2795)
 15: swank.core$eval_in_emacs_package.invoke(core.clj:94)
 16: swank.core$eval_for_emacs.invoke(core.clj:241)
 17: clojure.lang.Var.invoke(Var.java:409)
 18: clojure.lang.AFn.applyToHelper(AFn.java:167)
 19: clojure.lang.Var.applyTo(Var.java:518)
 20: clojure.core$apply.invoke(core.clj:600)
 21: swank.core$eval_from_control.invoke(core.clj:101)
 22: swank.core$eval_loop.invoke(core.clj:106)
 23: swank.core$spawn_repl_thread$fn__639$fn__640.invoke(core.clj:320)
 24: clojure.lang.AFn.applyToHelper(AFn.java:159)
 25: clojure.lang.AFn.applyTo(AFn.java:151)
 26: clojure.core$apply.invoke(core.clj:600)
 27: swank.core$spawn_repl_thread$fn__639.doInvoke(core.clj:317)
 28: clojure.lang.RestFn.invoke(RestFn.java:397)
 29: clojure.lang.AFn.run(AFn.java:24)
 30: java.lang.Thread.run(Unknown Source)

I didn't have any choice but to do type 0 here.

And then I encountered the new empty window titled myproject%5ccore.clj, where %5c seems to mean the ascii 0x5c backslash character code in my opinion. And then I returned to simple-repl-clojure buffer and found the answer 50 (the result of excuting (my-add 20 30)).

and then I retried the following experiment, adding the namespace 'myproject.core' to 'my-add' function.

user> (myproject.core/my-add 20 30)

I encountered again the next sldb clojure/3 window which had

CDT BreakpointEvent in thread Swank REPL Thread
From here you can: e/eval, v/show source, s/step, x/next, o/exit func

Restarts:
 0: [QUIT] Quit to the SLIME top level

Backtrace:
  0: myproject.core$my_add.invoke(core.clj:3)
  1: user$eval2744.invoke(NO_SOURCE_FILE:1)
  2: clojure.lang.Compiler.eval(Compiler.java:6465)
  3: clojure.lang.Compiler.eval(Compiler.java:6431)
  4: clojure.core$eval.invoke(core.clj:2795)
  5: swank.core$eval680$fn__681.invoke(core.clj:409)
  6: clojure.lang.MultiFn.invoke(MultiFn.java:163)
  7: swank.commands.basic$eval_region.invoke(basic.clj:48)
  8: swank.commands.basic$eval_region.invoke(basic.clj:38)
  9: swank.commands.basic$eval901$listener_eval__902.invoke(basic.clj:72)
 10: clojure.lang.Var.invoke(Var.java:401)
 11: user$eval2742.invoke(NO_SOURCE_FILE)
 12: clojure.lang.Compiler.eval(Compiler.java:6465)
 13: clojure.lang.Compiler.eval(Compiler.java:6431)
 14: clojure.core$eval.invoke(core.clj:2795)
 15: swank.core$eval_in_emacs_package.invoke(core.clj:94)
 16: swank.core$eval_for_emacs.invoke(core.clj:241)
 17: clojure.lang.Var.invoke(Var.java:409)
 18: clojure.lang.AFn.applyToHelper(AFn.java:167)
 19: clojure.lang.Var.applyTo(Var.java:518)
 20: clojure.core$apply.invoke(core.clj:600)
 21: swank.core$eval_from_control.invoke(core.clj:101)
 22: swank.core$eval_loop.invoke(core.clj:106)
 23: swank.core$spawn_repl_thread$fn__639$fn__640.invoke(core.clj:320)
 24: clojure.lang.AFn.applyToHelper(AFn.java:159)
 25: clojure.lang.AFn.applyTo(AFn.java:151)
 26: clojure.core$apply.invoke(core.clj:600)
 27: swank.core$spawn_repl_thread$fn__639.doInvoke(core.clj:317)
 28: clojure.lang.RestFn.invoke(RestFn.java:397)
 29: clojure.lang.AFn.run(AFn.java:24)
 30: java.lang.Thread.run(Unknown Source)

And the next message on the Minibuffer showed up.

File C:/work/lab/myproject/src/myproject%5ccore.clj no longer exists!

To sum up, in my guess, the first problem is that swank-clojure doesn't process the backslash character code properly.

And the second problem is that swank-cdt doesn't recognize src/myproject/core.clj unless I specifiy it explicitly, as in the case (myproject.core/my-add 20 30) in my experiment.