General Blogs: 2013

Saturday, October 19, 2013

Basic web application with SBT for Netbeans from scratch

If you haven't read my previous post SBT application for Netbeans from scratch, you will find it helpful to read it.
This post will illustrate how to create a webapplication from scratch. We will assume some knowledge of setting up a basic scala application with sbt. We won't be creating any scala code. Instead we will try to render a basic index.html page.

Create a project directory and name it what you want. cd into the project directory.
Create the following directories

mkdir -p src/main/resources src/main/scala src/main/webapp src/main/webapp/WEB-INF src/main/webapp/META-INF src/test/scala src/test/resources project

Application build, dependencies, plugins setup

Create build.sbt inside the project root directory and copy the text below into the file.

 name := "scalatra-sbt-1"

 version := "1.0"

 scalaVersion := "2.10.2"

 sbtVersion := "0.12.4"

 seq(webSettings :_*)

 libraryDependencies ++= Seq(
    "ch.qos.logback" % "logback-classic" % "1.0.6" % "runtime",
    "org.mortbay.jetty" % "jetty" % "6.1.22" % "container"
  )

Make sure that each setting is separated by an empty line.

Create a new file inside the project directory and name it build.properties. Copy the text below into the build.properties file.

sbt.version=0.12.4

Create another file plugins.sbt inside the project directory. Copy the text blow into that file.

// you can also add multiple repositories at the same time
resolvers ++= Seq(
  "Scala Tools Releases" at "http://scala-tools.org/repo-releases/",
  "Java.net Maven2 Repository" at "http://download.java.net/maven/2/"
)

addSbtPlugin("com.earldouglas" % "xsbt-web-plugin" % "0.4.2")

addSbtPlugin("com.mojolly.scalate" % "xsbt-scalate-generator" % "0.4.2")

addSbtPlugin("org.scalatra.sbt" % "scalatra-sbt" % "0.3.2")

addSbtPlugin( "org.netbeans.nbsbt" % "nbsbt-plugin" % "1.0.2" )

Once again, make sure each sbt task above is followed by an empty line, other wise sbt will complain.

web application setup

Create a new file src/main/webapp/index.html and copy the following text into it.

<html>
   <head>
      <title> First Scala WebApp</title>
   </head>
   <body>
      <h1>Hello, world from Scala webapp</h1>
   </body>
</html>

Create a new file src/main/webapp/WEB-INF/web.xml file and add the following lines into it.

  <xml version="1.0" encoding="UTF-8">

 <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

 <web-app>

 </web-app>

At this point you should be good to run the application. Use the following commands.

 > sbt clean compile
 >
 > sbt container:start

Now go to app by clicking on the link.
Bingo ! you got your first scala webapp running.

SBT application for Netbeans from scratch

mkdir NetbeansSBT
mkdir NetbeansSBT
Create a new file called build.sbt in the NetbeansSBT directory and add the following lines to it.

name := "netbeans-sbt-1"

version := "1.0"

scalaVersion := "2.10.2"

sbtVersion := "0.12.4"

Don't forget to seperate them with empty lines

Create a directory called project in the root project directory.
Create two files build.properties and plugins.sbt.
Open project/build.properties and add the following line

sbt.version=0.12.4

Open project/plugins.sbt and add the following line to it.

addSbtPlugin( "org.netbeans.nbsbt" % "nbsbt-plugin" % "1.0.2" )

Notice how the sbt version inside the build.sbt and build.properties match. This is needed.

Run the following command from the root directory.

mkdir -p src/main/scala src/main/resources src/test/scala src/test/resources

At this point you should have your project setup. You can now run the following command to compile the project.

sbt clean compile publish-local

We still have to generate netbeans project files so that it can be opened in Netbeans for editing. Use the following commands to do that.

Run sbt

sbt

If you are able to run sbt command ok, you should see output similar to this.

[info] Loading global plugins from /home/venkat/.sbt/plugins

[info] Loading project definition from /home/venkat/Documents/Scala/Scalatra/scalatra-sbt-1/project

[info] Set current project to scalatra-sbt-1 (in build file:/home/venkat/Documents/Scala/Scalatra/scalatra-sbt-1/)`

From sbt prompt run the netbeans command. This should generate netbeans files.

> netbeans

[info] About to create NetBeans project files for your project(s).

[info] Successfully created NetBeans project files for project(s):

[info] scalatra-sbt-1

Bingo ! Open the project up in Netbeans. Rant and rave in the comment section.

Friday, August 9, 2013

Perforce Command line tips

How to search changelists by user.

p4 changes -u vakkive -L

How to apply a patch ?

There is no perforce way to do this. However, IntelliJ has a way to apply patches . Look inside the VCS drop down menu.

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