官术网_书友最值得收藏!

Developing Spark applications in Eclipse with Maven

Maven as a build tool has become the de-facto standard over the years. It's not surprising if we look little deeper into the promise Maven brings. Maven has two primary features and they are:

  • Convention over configuration: Build tools prior to Maven gave developers freedom about where to put source files, where to put test files, where to put compiled files, and so on. Maven takes away that freedom. With this freedom, all the confusion about locations also goes. In Maven, there is a specific directory structure for everything. The following table shows a few of the most common locations:

In pom.xml (the configuration file that tells Maven all the information about a project), dependencies are declared in the form of these three coordinates. There is no need to search over the Internet and download, unpack, and copy libraries. All you need to do is to provide three coordinates of the dependency JAR you need and Maven will do the rest for you. The following is an example of using a JUnit dependency:

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.12</version>
</dependency>

This makes dependency management including transitive dependencies very easy. Build tools that came after Maven such as SBT and Gradle also follow these two rules as-is and provide enhancements in other aspects.

Getting ready

From this recipe onwards, this chapter assumes you have installed Eclipse. Please visit http://www.eclipse.org for details.

How to do it...

Let's see how to install the Maven plugin for Eclipse:

  1. Open Eclipse and navigate to Help | Install New Software.
  2. Click on the Work with drop-down menu.
  3. Select the <eclipse version> update site.
  4. Click on Collaboration tools.
  5. Check Maven's integration with Eclipse, as in the following screenshot:
  6. Click on Next and then click on Finish.

    There will be a prompt to restart Eclipse and Maven will be installed after the restart.

Now let's see how we can install the Scala plugin for Eclipse:

  1. Open Eclipse and navigate to Help | Install New Software.
  2. Click on the Work with drop-down menu.
  3. Select the <eclipse version> update site.
  4. Type http://download.scala-ide.org/sdk/helium/e38/scala210/stable/site.
  5. Press Enter.
  6. Select Scala IDE for Eclipse:
  7. Click on Next and then click on Finish. You will be prompted to restart Eclipse and Scala will be installed after the restart.
  8. Navigate to Window | Open Perspective | Scala.

Eclipse is now ready for Scala development!

主站蜘蛛池模板: 叙永县| 金湖县| 扎兰屯市| 西安市| 安康市| 望奎县| 依安县| 深泽县| 陆良县| 邵武市| 泸水县| 天津市| 会同县| 晋中市| 辉南县| 曲靖市| 贵溪市| 安福县| 德惠市| 台北市| 兴宁市| 临湘市| 台南市| 仙游县| 庐江县| 黎平县| 牟定县| 韶山市| 津市市| 巨鹿县| 马尔康县| 门源| 吴忠市| 景宁| 齐河县| 万年县| 应城市| 卓资县| 雷山县| 广昌县| 鹤山市|