Compojure by James Reeves(a British developer) is a small routing library for Ring that allows web applications to be composed of small, independent parts. (Compojure Github, 2012)
Ring is a Clojure web applications library inspired by Python's WSGI and Ruby's Rack.
Fig. a Rack app
Why Compojure?
The language I work with from day to day is Ruby, so Compojure has a lot in common with lightweight Ruby frameworks like Sinatra, and less with existing Java frameworks. It's designed for impatient, lazy people like myself, so it's quick to install and quick to start developing in.
- @James Reeves (on Google Group)
Tweets about "clojure compojure"
After installing lein, the following are the steps to get started with Clojure on Compojure :
STEP 1 install lein-newnew 0.2.6 and compojure/lein-template 0.2.0
STEP 2 create a new project using the "compojure" template
STEP 3 Make sure project is created
3.A) The dependencies are :
3.B) The structure of main is :
Change (defroutes) to the following
(defroutes app-routes
(GET "/" [] "Welcome To Rich Hickey Hotel")
(route/not-found "Not Found"))
STEP 4 start a development server using Leiningen
More On Compojure
[1] What's the “big idea” behind compojure routes?, http://stackoverflow.com/a/3490479/432903
https://docs.google.com/document/edit?id=1kKxwuPW0bkzxmbOvyMyJxfZNp71aMz4FifcVZclpTQY
[2] Is Clojure just "a Lisp syntax on the JVM"? Or is it more than that?, http://qr.ae/Ifo36
References
[1] Getting Started, https://github.com/weavejester/compojure/wiki/Getting-Started
[2] Installing Compojure from a clean Ubuntu, http://sharetheconversation.blogspot.com/2010/05/installing-compojure.html
[3] Using Leiningen to build Clojure code, http://alexott.net/en/clojure/ClojureLein.html#sec2
[4] Compojure Demystified with an example,
http://techbehindtech.com/2010/08/24/compojure-demystified-with-an-example-part-4/
Ring is a Clojure web applications library inspired by Python's WSGI and Ruby's Rack.
Why Compojure?
The language I work with from day to day is Ruby, so Compojure has a lot in common with lightweight Ruby frameworks like Sinatra, and less with existing Java frameworks. It's designed for impatient, lazy people like myself, so it's quick to install and quick to start developing in.
- @James Reeves (on Google Group)
Tweets about "clojure compojure"
After installing lein, the following are the steps to get started with Clojure on Compojure :
STEP 1 install lein-newnew 0.2.6 and compojure/lein-template 0.2.0
prayag@Prayag:~$ lein plugin install lein-newnew 0.2.6 [INFO] Unable to find resource 'lein-newnew:lein-newnew:jar:0.2.6' in repository central (http://repo1.maven.org/maven2) Downloading: stencil/stencil/0.2.0/stencil-0.2.0.pom from repository central at http://repo1.maven.org/maven2 Unable to locate resource in repository [INFO] Unable to find resource 'stencil:stencil:pom:0.2.0' in repository central (http://repo1.maven.org/maven2) Downloading: stencil/stencil/0.2.0/stencil-0.2.0.pom from repository clojars at http://clojars.org/repo/ Transferring 2K from clojars Downloading: org/clojure/clojure/1.3.0/clojure-1.3.0.pom from repository clojars at http://clojars.org/repo/ Transferring 5K from clojars Downloading: slingshot/slingshot/0.8.0/slingshot-0.8.0.pom from repository clojars at http://clojars.org/repo/ Transferring 1K from clojars Downloading: org/clojure/clojure/1.2.1/clojure-1.2.1.pom from repository clojars at http://clojars.org/repo/ Transferring 1K from clojars Downloading: bultitude/bultitude/0.1.5/bultitude-0.1.5.pom from repository central at http://repo1.maven.org/maven2 Unable to locate resource in repository [INFO] Unable to find resource 'bultitude:bultitude:pom:0.1.5' in repository central (http://repo1.maven.org/maven2) Downloading: bultitude/bultitude/0.1.5/bultitude-0.1.5.pom from repository clojars at http://clojars.org/repo/ Transferring 2K from clojars Downloading: slingshot/slingshot/0.8.0/slingshot-0.8.0.jar from repository clojars at http://clojars.org/repo/ Downloading: bultitude/bultitude/0.1.5/bultitude-0.1.5.jar from repository central at http://repo1.maven.org/maven2 Downloading: stencil/stencil/0.2.0/stencil-0.2.0.jar from repository central at http://repo1.maven.org/maven2 Downloading: org/clojure/clojure/1.3.0/clojure-1.3.0.jar from repository clojars at http://clojars.org/repo/ Transferring 6K from clojars Unable to locate resource in repository [INFO] Unable to find resource 'bultitude:bultitude:jar:0.1.5' in repository central (http://repo1.maven.org/maven2) Downloading: bultitude/bultitude/0.1.5/bultitude-0.1.5.jar from repository clojars at http://clojars.org/repo/ Unable to locate resource in repository [INFO] Unable to find resource 'stencil:stencil:jar:0.2.0' in repository central (http://repo1.maven.org/maven2) Downloading: stencil/stencil/0.2.0/stencil-0.2.0.jar from repository clojars at http://clojars.org/repo/ Transferring 3K from clojars Transferring 16K from clojars Transferring 3311K from clojars Copying 3 files to /tmp/lein-6b1bc0ca-676e-4487-810f-c017583b8a43/lib Including lein-newnew-0.2.6.jar Including stencil-0.2.0.jar Including bultitude-0.1.5.jar Including slingshot-0.8.0.jar Created lein-newnew-0.2.6.jar
prayag@Prayag:~$ lein plugin install compojure/lein-template 0.2.0 [INFO] Unable to find resource 'compojure:lein-template:jar:0.2.0' in repository central (http://repo1.maven.org/maven2) Downloading: leinjacker/leinjacker/0.2.0/leinjacker-0.2.0.pom from repository central at http://repo1.maven.org/maven2 Unable to locate resource in repository [INFO] Unable to find resource 'leinjacker:leinjacker:pom:0.2.0' in repository central (http://repo1.maven.org/maven2) Downloading: leinjacker/leinjacker/0.2.0/leinjacker-0.2.0.pom from repository clojars at http://clojars.org/repo/ Transferring 3K from clojars Downloading: trammel/trammel/0.7.0/trammel-0.7.0.pom from repository clojars at http://clojars.org/repo/ Transferring 2K from clojars [INFO] snapshot thneed:thneed:1.0.0-SNAPSHOT: checking for updates from clojars [INFO] snapshot thneed:thneed:1.0.0-SNAPSHOT: checking for updates from central Downloading: thneed/thneed/1.0.0-SNAPSHOT/thneed-1.0.0-20120330.013054-1.pom from repository clojars at http://clojars.org/repo/ Transferring 1K from clojars Downloading: leinjacker/leinjacker/0.2.0/leinjacker-0.2.0.jar from repository central at http://repo1.maven.org/maven2 Downloading: thneed/thneed/1.0.0-SNAPSHOT/thneed-1.0.0-20120330.013054-1.jar from repository clojars at http://clojars.org/repo/ Downloading: trammel/trammel/0.7.0/trammel-0.7.0.jar from repository clojars at http://clojars.org/repo/ Transferring 6K from clojars Unable to locate resource in repository [INFO] Unable to find resource 'leinjacker:leinjacker:jar:0.2.0' in repository central (http://repo1.maven.org/maven2) Downloading: leinjacker/leinjacker/0.2.0/leinjacker-0.2.0.jar from repository clojars at http://clojars.org/repo/ Transferring 9K from clojars Transferring 5K from clojars Copying 3 files to /tmp/lein-77d9ecd7-c721-46ab-8760-5a5c9c2803df/lib Including lein-template-0.2.0.jar Including thneed-1.0.0-20120330.013054-1.jar Including trammel-0.7.0.jar Including leinjacker-0.2.0.jar Created compojure-lein-template-0.2.0.jar
STEP 2 create a new project using the "compojure" template
prayag@Prayag:~$ sudo chmod 777 workspace_erujopmoc/
prayag@Prayag:~$ cd workspace_erujopmoc/
prayag@Prayag:~/workspace_erujopmoc$ lein new compojure hotel
STEP 3 Make sure project is created
prayag@Prayag:~/workspace_erujopmoc/hotel$ ls -la total 44 drwxrwxr-x 7 prayag prayag 4096 Jan 14 18:09 . drwxrwxrwx 3 root root 4096 Jan 14 18:01 .. drwxrwxr-x 2 prayag prayag 4096 Jan 14 18:09 classes -rw-rw-r-- 1 prayag prayag 109 Jan 14 18:01 .gitignore -rw-rw-r-- 1 prayag prayag 40 Jan 14 18:09 .lein-deps-sum drwxrwxr-x 2 prayag prayag 4096 Jan 14 18:07 .lein-plugins drwxrwxr-x 3 prayag prayag 4096 Jan 14 18:09 lib -rw-rw-r-- 1 prayag prayag 309 Jan 14 18:01 project.clj -rw-rw-r-- 1 prayag prayag 256 Jan 14 18:01 README.md drwxrwxr-x 3 prayag prayag 4096 Jan 14 18:01 src drwxrwxr-x 3 prayag prayag 4096 Jan 14 18:01 test
3.A) The dependencies are :
(defproject hotel "0.1.0-SNAPSHOT" :description "FIXME: write description" :url "http://example.com/FIXME" :dependencies [[org.clojure/clojure "1.4.0"] [compojure "1.1.1"]] :plugins [[lein-ring "0.7.1"]] :ring {:handler hotel.handler/app} :dev-dependencies [[ring-mock "0.1.2"]])
3.B) The structure of main is :
prayag@Prayag:~/workspace_erujopmoc/hotel$ ls -l src/hotel/
total 4
-rw-rw-r-- 1 prayag prayag 252 Jan 14 18:01 handler.clj
The src/hotel/handler.clj reads as follws :
(ns hotel.handler (:use compojure.core) (:require [compojure.handler :as handler] [compojure.route :as route])) (defroutes app-routes (GET "/" [] "Hello World") (route/not-found "Not Found")) (def app (handler/site app-routes))
Change (defroutes) to the following
(defroutes app-routes
(GET "/" [] "Welcome To Rich Hickey Hotel")
(route/not-found "Not Found"))
STEP 4 start a development server using Leiningen
prayag@Prayag:~/workspace_erujopmoc/hotel$ lein ring server Downloading: lein-ring/lein-ring/0.7.1/lein-ring-0.7.1.pom from repository central at http://repo1.maven.org/maven2 Unable to locate resource in repository [INFO] Unable to find resource 'lein-ring:lein-ring:pom:0.7.1' in repository central (http://repo1.maven.org/maven2) Downloading: lein-ring/lein-ring/0.7.1/lein-ring-0.7.1.pom from repository clojars at http://clojars.org/repo/ Transferring 2K from clojars Downloading: org/clojure/data.xml/0.0.3/data.xml-0.0.3.pom from repository clojars at http://clojars.org/repo/ Unable to locate resource in repository [INFO] Unable to find resource 'org.clojure:data.xml:pom:0.0.3' in repository clojars (http://clojars.org/repo/) Downloading: org/clojure/data.xml/0.0.3/data.xml-0.0.3.pom from repository central at http://repo1.maven.org/maven2 Transferring 1K from central Downloading: org/clojure/pom.contrib/0.0.25/pom.contrib-0.0.25.pom from repository sonatype-oss-snapshots at https://oss.sonatype.org/content/repositories/snapshots Unable to locate resource in repository [INFO] Unable to find resource 'org.clojure:pom.contrib:pom:0.0.25' in repository sonatype-oss-snapshots (https://oss.sonatype.org/content/repositories/snapshots) Downloading: org/clojure/pom.contrib/0.0.25/pom.contrib-0.0.25.pom from repository clojars at http://clojars.org/repo/ Unable to locate resource in repository [INFO] Unable to find resource 'org.clojure:pom.contrib:pom:0.0.25' in repository clojars (http://clojars.org/repo/) Downloading: org/clojure/pom.contrib/0.0.25/pom.contrib-0.0.25.pom from repository central at http://repo1.maven.org/maven2 Transferring 5K from central Downloading: org/clojure/data.xml/0.0.3/data.xml-0.0.3.jar from repository clojars at http://clojars.org/repo/ Downloading: lein-ring/lein-ring/0.7.1/lein-ring-0.7.1.jar from repository central at http://repo1.maven.org/maven2 Unable to locate resource in repository [INFO] Unable to find resource 'lein-ring:lein-ring:jar:0.7.1' in repository central (http://repo1.maven.org/maven2) Downloading: lein-ring/lein-ring/0.7.1/lein-ring-0.7.1.jar from repository clojars at http://clojars.org/repo/ [...] Copying 1 file to /home/prayag/workspace_erujopmoc/hotel/lib/dev 2013-01-14 18:09:24.142:INFO:oejs.Server:jetty-7.6.1.v20120215 Started server on port 3000 2013-01-14 18:09:24.218:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:3000
STEP 5 Hit http://localhost:3000/ and scream
Welcome To Rich Hickey Hotel
More On Compojure
[1] What's the “big idea” behind compojure routes?, http://stackoverflow.com/a/3490479/432903
https://docs.google.com/document/edit?id=1kKxwuPW0bkzxmbOvyMyJxfZNp71aMz4FifcVZclpTQY
[2] Is Clojure just "a Lisp syntax on the JVM"? Or is it more than that?, http://qr.ae/Ifo36
References
[1] Getting Started, https://github.com/weavejester/compojure/wiki/Getting-Started
[2] Installing Compojure from a clean Ubuntu, http://sharetheconversation.blogspot.com/2010/05/installing-compojure.html
[3] Using Leiningen to build Clojure code, http://alexott.net/en/clojure/ClojureLein.html#sec2
[4] Compojure Demystified with an example,
http://techbehindtech.com/2010/08/24/compojure-demystified-with-an-example-part-4/
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