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Getting started with Datomic and Clojure in Emacs

My project.clj file is as follows

(defproject cljs-template "0.1.0-SNAPSHOT" :description "FIXME: write this!" :url "http://example.com/FIXME" :dependencies [[org.clojure/clojure "1.4.0-beta4"] [noir-cljs "0.3.0"] [fetch "0.1.0-alpha2"] [noir "1.3.0-beta2"] [org.clojure/core.cache "0.5.0"] [com.datomic/datomic "0.1.3142" :exclusions [org.slf4j/slf4j-nop org.slf4j/slf4j-log4j12]] [ch.qos.logback/logback-classic "1.0.1"]] :plugins [[lein-swank "1.4.3"]] ;:cljsbuild {:builds [{}]} :main ^{:skip-aot true} cljs-template.server)

and my / src / cljs _template / server.clj starts like this:

 (ns cljs-template.server (:require [noir.server :as server] [noir.cljs.core :as cljs] [cljs-template.tree :as tree]) (:use [datomic.api :only [db q] :as d]))

Then I run swank, run (in-ns' cljs-template.server) inside it, move my cursor to the end of the function call (ns) and try to run the (ns) method with Ctrl-x Ctrl-e. When I do this, I get the following error.

 No message. [Thrown class java.lang.ExceptionInInitializerError] Restarts: 0: [QUIT] Quit to the SLIME top level 1: [CAUSE1] Invoke debugger on cause org.apache.lucene.index.IndexWriterConfig [Thrown class java.lang.ClassNotFoundException] Backtrace: 0: (Unknown Source) java.lang.Class.forName0 1: Class.java:247 java.lang.Class.forName 2: RT.java:2030 clojure.lang.RT.loadClassForName 3: RT.java:417 clojure.lang.RT.load 4: RT.java:398 clojure.lang.RT.load 5: core.clj:5386 clojure.core/load[fn] 6: core.clj:5385 clojure.core/load 7: RestFn.java:408 clojure.lang.RestFn.invoke 8: core.clj:5200 clojure.core/load-one 9: core.clj:5237 clojure.core/load-lib 10: RestFn.java:142 clojure.lang.RestFn.applyTo 11: core.clj:602 clojure.core/apply 12: core.clj:5271 clojure.core/load-libs 13: RestFn.java:137 clojure.lang.RestFn.applyTo 14: core.clj:602 clojure.core/apply 15: core.clj:5352 clojure.core/require 16: RestFn.java:436 clojure.lang.RestFn.invoke 17: fulltext_index.clj:4 datomic.fulltext-index/loading 18: (Unknown Source) datomic.fulltext_index__init.load 19: (Unknown Source) datomic.fulltext_index__init.<clinit> 20: (Unknown Source) java.lang.Class.forName0 21: Class.java:247 java.lang.Class.forName 22: RT.java:2030 clojure.lang.RT.loadClassForName 23: RT.java:417 clojure.lang.RT.load 24: RT.java:398 clojure.lang.RT.load 25: core.clj:5386 clojure.core/load[fn] 26: core.clj:5385 clojure.core/load 27: RestFn.java:408 clojure.lang.RestFn.invoke 28: core.clj:5200 clojure.core/load-one 29: core.clj:5237 clojure.core/load-lib 30: RestFn.java:142 clojure.lang.RestFn.applyTo 31: core.clj:602 clojure.core/apply 32: core.clj:5271 clojure.core/load-libs 33: RestFn.java:137 clojure.lang.RestFn.applyTo 34: core.clj:602 clojure.core/apply 35: core.clj:5352 clojure.core/require 36: RestFn.java:703 clojure.lang.RestFn.invoke 37: db.clj:4 datomic.db/loading 38: (Unknown Source) datomic.db__init.load 39: (Unknown Source) datomic.db__init.<clinit> 40: (Unknown Source) java.lang.Class.forName0 41: Class.java:247 java.lang.Class.forName 42: RT.java:2030 clojure.lang.RT.loadClassForName 43: RT.java:417 clojure.lang.RT.load 44: RT.java:398 clojure.lang.RT.load 45: core.clj:5386 clojure.core/load[fn] 46: core.clj:5385 clojure.core/load 47: RestFn.java:408 clojure.lang.RestFn.invoke 48: core.clj:5200 clojure.core/load-one 49: core.clj:5237 clojure.core/load-lib 50: RestFn.java:142 clojure.lang.RestFn.applyTo 51: core.clj:602 clojure.core/apply 52: core.clj:5271 clojure.core/load-libs 53: RestFn.java:137 clojure.lang.RestFn.applyTo 54: core.clj:602 clojure.core/apply 55: core.clj:5352 clojure.core/require 56: RestFn.java:703 clojure.lang.RestFn.invoke 57: query.clj:4 datomic.query/loading 58: (Unknown Source) datomic.query__init.load 59: (Unknown Source) datomic.query__init.<clinit> 60: (Unknown Source) java.lang.Class.forName0 61: Class.java:247 java.lang.Class.forName 62: RT.java:2030 clojure.lang.RT.loadClassForName 63: RT.java:417 clojure.lang.RT.load 64: RT.java:398 clojure.lang.RT.load 65: core.clj:5386 clojure.core/load[fn] 66: core.clj:5385 clojure.core/load 67: RestFn.java:408 clojure.lang.RestFn.invoke 68: core.clj:5200 clojure.core/load-one 69: core.clj:5237 clojure.core/load-lib 70: RestFn.java:142 clojure.lang.RestFn.applyTo 71: core.clj:602 clojure.core/apply 72: core.clj:5271 clojure.core/load-libs 73: RestFn.java:137 clojure.lang.RestFn.applyTo 74: core.clj:602 clojure.core/apply 75: core.clj:5352 clojure.core/require 76: RestFn.java:421 clojure.lang.RestFn.invoke 77: api.clj:6 datomic.api/loading 78: (Unknown Source) datomic.api__init.load 79: (Unknown Source) datomic.api__init.<clinit> 80: (Unknown Source) java.lang.Class.forName0 81: Class.java:247 java.lang.Class.forName 82: RT.java:2030 clojure.lang.RT.loadClassForName 83: RT.java:417 clojure.lang.RT.load 84: RT.java:398 clojure.lang.RT.load 85: core.clj:5386 clojure.core/load[fn] 86: core.clj:5385 clojure.core/load 87: RestFn.java:408 clojure.lang.RestFn.invoke 88: core.clj:5200 clojure.core/load-one 89: core.clj:5237 clojure.core/load-lib 90: RestFn.java:142 clojure.lang.RestFn.applyTo 91: core.clj:602 clojure.core/apply 92: core.clj:5271 clojure.core/load-libs 93: RestFn.java:137 clojure.lang.RestFn.applyTo 94: core.clj:604 clojure.core/apply 95: core.clj:5363 clojure.core/use 96: RestFn.java:408 clojure.lang.RestFn.invoke 97: NO_SOURCE_FILE:1 cljs-template.server/eval1941[fn] 98: NO_SOURCE_FILE:1 cljs-template.server/eval1941 99: Compiler.java:6465 clojure.lang.Compiler.eval 100: Compiler.java:6455 clojure.lang.Compiler.eval 101: Compiler.java:6431 clojure.lang.Compiler.eval 102: core.clj:2795 clojure.core/eval 103: core.clj:532 swank.core/eval782[fn] 104: MultiFn.java:163 clojure.lang.MultiFn.invoke 105: basic.clj:54 swank.commands.basic/eval-region 106: basic.clj:44 swank.commands.basic/eval-region 107: basic.clj:73 swank.commands.basic/eval968[fn] 108: Var.java:401 clojure.lang.Var.invoke 109: (Unknown Source) user/eval1937 110: Compiler.java:6465 clojure.lang.Compiler.eval 111: Compiler.java:6431 clojure.lang.Compiler.eval 112: core.clj:2795 clojure.core/eval 113: core.clj:100 swank.core/eval-in-emacs-package 114: core.clj:256 swank.core/eval-for-emacs 115: Var.java:409 clojure.lang.Var.invoke 116: AFn.java:167 clojure.lang.AFn.applyToHelper 117: Var.java:518 clojure.lang.Var.applyTo 118: core.clj:600 clojure.core/apply 119: core.clj:107 swank.core/eval-from-control 120: core.clj:330 swank.core/spawn-worker-thread[fn] 121: AFn.java:159 clojure.lang.AFn.applyToHelper 122: AFn.java:151 clojure.lang.AFn.applyTo 123: core.clj:600 clojure.core/apply 124: core.clj:326 swank.core/spawn-worker-thread[fn] 125: RestFn.java:397 clojure.lang.RestFn.invoke 126: AFn.java:24 clojure.lang.AFn.run 127: Thread.java:662 java.lang.Thread.run

Then I press 0 to close stacktrace and again press Ctrl-x Ctrl-e to call (ns), now my error is:

 Could not initialize class datomic.api__init [Thrown class java.lang.NoClassDefFoundError] Restarts: 0: [QUIT] Quit to the SLIME top level Backtrace: 0: (Unknown Source) java.lang.Class.forName0 1: Class.java:247 java.lang.Class.forName 2: RT.java:2030 clojure.lang.RT.loadClassForName 3: RT.java:417 clojure.lang.RT.load 4: RT.java:398 clojure.lang.RT.load 5: core.clj:5386 clojure.core/load[fn] 6: core.clj:5385 clojure.core/load 7: RestFn.java:408 clojure.lang.RestFn.invoke 8: core.clj:5200 clojure.core/load-one 9: core.clj:5237 clojure.core/load-lib 10: RestFn.java:142 clojure.lang.RestFn.applyTo 11: core.clj:602 clojure.core/apply 12: core.clj:5271 clojure.core/load-libs 13: RestFn.java:137 clojure.lang.RestFn.applyTo 14: core.clj:604 clojure.core/apply 15: core.clj:5363 clojure.core/use 16: RestFn.java:408 clojure.lang.RestFn.invoke 17: NO_SOURCE_FILE:1 cljs-template.server/eval6292[fn] 18: NO_SOURCE_FILE:1 cljs-template.server/eval6292 19: Compiler.java:6465 clojure.lang.Compiler.eval 20: Compiler.java:6455 clojure.lang.Compiler.eval 21: Compiler.java:6431 clojure.lang.Compiler.eval 22: core.clj:2795 clojure.core/eval 23: core.clj:532 swank.core/eval782[fn] 24: MultiFn.java:163 clojure.lang.MultiFn.invoke 25: basic.clj:54 swank.commands.basic/eval-region 26: basic.clj:44 swank.commands.basic/eval-region 27: basic.clj:73 swank.commands.basic/eval968[fn] 28: Var.java:401 clojure.lang.Var.invoke 29: (Unknown Source) cljs-template.server/eval6288 30: Compiler.java:6465 clojure.lang.Compiler.eval 31: Compiler.java:6431 clojure.lang.Compiler.eval 32: core.clj:2795 clojure.core/eval 33: core.clj:100 swank.core/eval-in-emacs-package 34: core.clj:256 swank.core/eval-for-emacs 35: Var.java:409 clojure.lang.Var.invoke 36: AFn.java:167 clojure.lang.AFn.applyToHelper 37: Var.java:518 clojure.lang.Var.applyTo 38: core.clj:600 clojure.core/apply 39: core.clj:107 swank.core/eval-from-control 40: core.clj:330 swank.core/spawn-worker-thread[fn] 41: AFn.java:159 clojure.lang.AFn.applyToHelper 42: AFn.java:151 clojure.lang.AFn.applyTo 43: core.clj:600 clojure.core/apply 44: core.clj:326 swank.core/spawn-worker-thread[fn] 45: RestFn.java:397 clojure.lang.RestFn.invoke 46: AFn.java:24 clojure.lang.AFn.run 47: Thread.java:662 java.lang.Thread.run

What am I doing wrong? How to get datomic working in emacs using swank / slime.

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2 answers

Turns out I was executing the wrong command.

I ran lein faults and get the following error.

 ... Try downloading the file manually from the project website. Then, install it using the command: mvn install:install-file -DgroupId=com.datomic -DartifactId=datomic -Dversion=0.1.3157 -Dpackaging=jar -Dfile=/path/to/file Alternatively, if you host your own repository you can deploy the file there: mvn deploy:deploy-file -DgroupId=com.datomic -DartifactId=datomic -Dversion=0.1.3157 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id] Path to dependency: 1) org.apache.maven:super-pom:pom:2.0 2) com.datomic:datomic:jar:0.1.3157

I saw that the README file in the downloaded digital code also contained a mention of adding datomic to my mvn. Naturally (the stupid part goes here), I assumed that they say the same thing.

lein will tell you what you must follow

 mvn install:install-file -DgroupId=com.datomic -DartifactId=datomic -Dversion=0.1.3157 -Dpackaging=jar -Dfile=/path/to/file

README says you should follow

 mvn install:install-file -DgroupId=com.datomic -DartifactId=datomic -Dfile=datomic-${DATOMIC-VERSION}.jar -DpomFile=pom.xml

Did you notice that README instructions also contain a pom.xml file? I, too! Yes, it is important.

In any case, be sure to specify the pom.xml file. If you tried to add datomic 0.1.3157 to your mvn repository, you should do the following in the data directory that you downloaded.

 mvn install:install-file -DgroupId=com.datomic -DartifactId=datomic -Dfile=datomic-0.1.3157.jar -DpomFile=pom.xml
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I posted a working draft here

My usual suspect for debugging problems:

  • updated actual
  • lein-swank version
  • version of emacs (Emacs 24, I found it much more reliable).
  • remaining old dependencies in the lib directory

EDIT: The correct way to get bytes of data, as Stephen Cagle says, copied his comment below:

  mvn install:install-file -DgroupId=com.datomic -DartifactId=datomic -Dfile=datomic-${DATOMIC-VERSION}.jar
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Source: https://habr.com/ru/post/1414002/

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