A Clojure library designed to render velocity template for ring in clojure.

Usage

Adds dependency in leiningen project.clj:

  [ring.velocity "0.1.0-SNAPSHOT"] 

Create a directory named templates in your project directory to keep all velocity templates.

Create a template templates/test.vm:

  hello,$name,your age is $age. 

Use ring.velocity in your namespace:

  (use '[ring.velocity.core :only [render]]) 

Use render function to render template with vars:

  (render "test.vm" :name "dennis" :age 29) 

The test.vm will be interpreted equals to:

  hello,dennis,your age is 29. 

Use ring.velocity in compojure:

  (defroutes app-routes      
    (GET "/" [] (render "test.vm" :name "dennis" :age 29))   
    (route/not-found "Not Found")) 

Use ring.velocity in ring:

  (use '[ring.util.response])   
  (response (render "test.vm" :name "dennis" :age 29)) 

Custom velocity properties,just put a file named ring-velocity.properties to your classpath or resource paths.The default velocity properties is in src/default/velocity.properties.

License

Copyright © 2012 dennis zhuang[killme2008@gmail.com]

Distributed under the Eclipse Public License, the same as Clojure.

Home: https://github.com/killme2008/ring.velocity

• Type hint官方指南
• invokevirtual指令
• Clojure源码

• ssh and scp both have a new option :sudo  to be executed as root on remote machines,for example:
  

  (ssh "/etc/init.d/ssh restart" :sudo true)

• scp has a new  option :mode to change file modes copied from local: 
  

  (scp "start.sh" "/etc/init.d/start.sh" :sudo true :mode 755)

• A  new function "exists?" to test if a file exists on remote machines:  
  

  (if (not (exists? (str "/home/deploy/.ssh")))
        (ssh (sudo (str "mkdir -p /home/deploy/.ssh"))))

• Call other task in deftask with "call" function:

  (deftask :ps "A task to grep process" [process]
          (ssh (str "ps aux | grep " process)))
  (deftask :start_ha []
          (ssh "/etc/init.d/haproxy start")
          (call :ps "haproxy"))

• A new function "append" to append a line to a file on remote machines:
  

  (ssh (append "/etc/hosts" "192.168.1.100 web" :sudo true))

• A new function "sed" to replace lines in a file on remote machines,and comm/uncomm to comment/uncomment a line in a file:
  

        (sed <file> <before> <after> :flags <flags> :limit <limit> :backup <backup>)
  

  Equivalent to

        sed -i<backup> -r -e "<limit> s/<before>/<after>/<flags>g <filename>"

• Limits max output line to 10000.

• Adds more documents in wiki: https://github.com/killme2008/clojure-control/wiki 

clj-xmemcached

    Clj-xmemcached is an opensource memcached client for clojure wrapping xmemcached. Xmemcached is an opensource high performance memcached client for java.

Leiningen Usage

To include clj-xmemcached,add:

     [clj-xmemcached "0.1.1"]

to your project.clj.

Usage

Create a client

Then we create a memcached client using binary protocol to talk with memcached servers host1:port1 and host2:port2. Valid options including:

  :name       Client's name
  :protocol  Protocol to talk with memcached,a string value in text,binary or kestrel,default is text protocol.
  :hash          Hash algorithm,a string value in consistent or standard,default is standard hash.
  :timeout    Operation timeout in milliseconds,default is five seconds.
  :pool          Connection pool size,default is one.

Store items

The value 100 is the expire time for the item in seconds.Store functions include xset,xadd,xreplace,xappend and xprepend.Please use doc to print documentation for these functions.

Get items

xgets returns a value including a cas value,for example:

And bulk get returns a HashMap contains existent items.

Increase/Decrease numbers

Above codes try to increase/decrease a number in memcached with key "num",and if the item is not exists,then set it to zero.

Delete items

Compare and set

We use inc function to increase the current value in memcached and try to compare and set it at most Integer.MAX_VALUE times. xcas can be called as:


The cas-fn is a function to return a new value,set the new value to

Shutdown

Flush

Statistics

Example

Please see the example code in example/demo.clj

License

Copyright (C) 2011-2014 dennis zhuang[killme2008@gmail.com]

Distributed under the Eclipse Public License, the same as Clojure.

    The idea came from node-control.
    Define clusters and tasks for system administration or code deployment, then execute them on one or many remote machines.
    Clojure-control depends only on OpenSSH and clojure on the local control machine.Remote machines simply need a standard sshd daemon.

2.Quick example

Get the current date from the two machines listed in the 'mycluster'  config with a single command:

    If saved in a file named "controls.clj",run with   

    Each machine execute "date" command ,and the output form the remote machine is printed to the console.Exmaple console output

    Each line of output is labeled with the address of the machine the command was executed on. The actual command sent and the user used to send it is displayed. stdout and stderr output of the remote process is identified as well as the final exit code of the local ssh command.

3.How to scp files?
    Let's define a new task named deploy

    Then it will copy release1.tar.gz and release2.tar.gz to remote machine's /home/alogin directory.

4.Where is it?