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'restful'에 해당되는 글 1

  1. 2013.11.15 [BI Dashboard] Eclipse Juno에 Spring + Maven 환경설정 및 테스트
2013.11.15 04:42 My Projects/BI Dashboard

자바기반 서버 환경 구축을 위한 기반 기술 설정에 대하여 알아보자. 우선 빌드환경인 Maven과 Spring Framework을 설치하고 간단히 RESTful 호출 테스트를 해보자 



1. Eclipse 플러그인 설치 

  - Eclipse Juno를 다운로드하여 설치 및 JDK1.6 사용

  - Sublime text 사용에 익숙하다면 http://eclipsecolorthemes.org/ 플러그인을 설치후 에서 Sublime Theme으로 바꾸어 사용한다 

  - Eclipse Marketplace에서 

    + STS (Spring Tool Suite - juno 4.2)를 설치

    + Maven (Maven Integration for Eclipse - juno and newer)를 설치

    + Git 사용한다면 EGit - Git Team Provider를 설치

    + SVN 사용한다면 Subversive - SVN Team Provider 설치 (참조1, 참조2)

       > "Help/Install New Software..."에서 

       > SVN Connector - http://community.polarion.com/projects/subversive/download/eclipse/3.0/juno-site/ 통해 설치

          Mac의 HL 부분은 unselect 

       > SVN Kit 1.7.8 선택한다. 

      


  

2. Spring MVC 프로젝트 구성

  - Maven으로 Simple project를 만든다. jar 배포 프로젝트로 만듦

  - 프로퍼티에서 Project facets에서 "Dynamics Web Module"를 선택하고 "Further configuration available..."에서 webapp 설정

  - webapp를 설정하였으면 src/main 밑으로 강제 이동시킴 

    

  - 프로퍼티에서 Deployment Assembly에서 add... 하여 Maven Denpendencies... 라이브러리가 WEB-INF/lib에 포함되도록 설정

    (참조)

    


  - pom.xml 에서 <packaging>jar</packaging>에서  <packaging>war</packaging>로 바꾼다 

  - 하기 의존성 라이브러리를 추가한다 

    + Spring Framework : v3.2.0

    + JDK : v1.6

    + JUnit : v4.11

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>com.ysyun</groupId>

<artifactId>DashboardTest</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>war</packaging>


<properties>

<spring.version>3.2.0.RELEASE</spring.version>

<junit.version>4.11</junit.version>

<jdk.version>1.6</jdk.version>

</properties>


<dependencies>


<!-- Spring 3 dependencies -->

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>${spring.version}</version>

</dependency>


<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>


<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>${spring.version}</version>

</dependency>


<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>${junit.version}</version>

<scope>test</scope>

</dependency>

</dependencies>

<build>

<finalName>DashboardTest</finalName>

<plugins>

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<version>3.0</version>

<configuration>

<source>${jdk.version}</source>

<target>${jdk.version}</target>

</configuration>

</plugin>

</plugins>

</build>

</project>



3. RESTful 테스트 하기 

  - Controller 추가하기 : RESTful uri 설정

package com.lge.dashboard;


import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;


@Controller

@RequestMapping("/")

public class HelloController {

 

@RequestMapping(value="/welcome", method = RequestMethod.GET)

public String welcome(ModelMap model) {

 

model.addAttribute("message", "Maven Web Project + Spring 3 MVC - welcome()");

 

//Spring uses InternalResourceViewResolver and return back index.jsp

return "index";

}

 

@RequestMapping(value="/welcome/{name}", method = RequestMethod.GET)

public String welcomeName(@PathVariable String name, ModelMap model) {

 

model.addAttribute("message", "Maven Web Project + Spring 3 MVC - " + name);

return "index";

 

}

 

}

  - web.xml 설정 : spring dispatcher를 설정한다 

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

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

id="WebApp_ID" version="3.0">

<display-name>Counter Web Application</display-name>


<servlet>

<servlet-name>mvc-dispatcher</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>


<servlet-mapping>

<servlet-name>mvc-dispatcher</servlet-name>

<url-pattern>/</url-pattern>

</servlet-mapping>


<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>

</context-param>


<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

</web-app>

  - mvc-dispathcer-servlet.xml 스프링 환경설정 

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

        http://www.springframework.org/schema/beans     

        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/context 

        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

 

<context:component-scan base-package="com.lge.*" />

 

<bean

class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix">

<value>/WEB-INF/pages/</value>

</property>

<property name="suffix">

<value>.jsp</value>

</property>

</bean>

 

</beans>

  - WEB-INF/pages폴더를 만들고 index.jsp 파일 생성 

<html>

<body>

<h2>Hello World!</h2>

 

<h4>Message : ${message}</h1>

</body>

</html>

  - 전체 설정 정보 

    

  - Tomcat v7.0 설정이 되었다면 Run As 에서 "Run on Server"로 DashboardTest 컨텍스트 추가하여 Tomcat 기동

    /<contextName>/welcome/<value> 넣어서 호출하면 하기와 같이 나온다 

    

  - maven Goal에 대한 명령을 수행할 경우 

Goal은 ant의 target과 같은 개념으로, mvn의 경우 pre-defined goal을 가지고 있다.

mvn compile : 컴파일 수행

mvn package : jar 파일로 패키징

mvn test : JUnit 테스트 수행

mvn install : local repository (PC내의 디렉토리)에 해당 jar 파일을 저장 

mvn deploy  : remote repository (Nexus)에 jar 파일 저장

mvn clean : 컴파일 내용 모두 삭제

mvn build : 위의 예제는 일반적은 spring-java 코드로 build goal을 제공하지 않는다. 

(Eclipse에서 run as하면 나와서 헷갈리게 만드는데) build goal을 지원하는 프로젝트를 만들거나 또는 pom.xml안에 인위적으로 build goal을 지정해줘야 한다. 보통 clean install 등 여러 명령을 스페이스로 구분하여 파라미터를 줄 수 있다 

  - 만들어진 pom.xml 파일 

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>com.ysyun</groupId>

<artifactId>DashboardTest</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>war</packaging>

<url>http://maven.apache.org</url>


<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<spring.version>3.2.0.RELEASE</spring.version>

<junit.version>4.11</junit.version>

<jdk.version>1.6</jdk.version>

</properties>


<dependencies>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>${spring.version}</version>

</dependency>


<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>


<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>${spring.version}</version>

</dependency>


<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>${junit.version}</version>

<scope>test</scope>

</dependency>

</dependencies>

<build>

<finalName>DashboardTest</finalName>

<plugins>

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<version>3.0</version>

<configuration>

<source>${jdk.version}</source>

<target>${jdk.version}</target>

</configuration>

</plugin>

</plugins>

</build>

</project>



4. Spring 에 대한 Enterprise 환경 설정 원칙 

  - Enterprise Spring Best Practices

  - Bean Post Processors를 등록하는 어노테이션

RequiredAnnotationBeanPostProcessor – (@Required)

CommonAnnotationBeanPostProcessor – (@PostConstruct, @PreDestroy, @Resource, etc.)

AutowiredAnnotationBeanPostProcessor – (@Autowired, @Value, @Inject, etc.)

PersistenceAnnotationBeanPostProcessor – (@PersistenceUnit, @PersistenceContext, etc.)

  - annotation-config 지시자 설정

<context:annotation-config/>

  - 애플리케이션 컴포넌트 scanning 지시자 설정

<context:component-scan base-package="com.gordondickens.enterprisespring" use-default-filters="false">

<context:exclude-filter 

   expression="org.springframework.stereotype.Controller"

   type="annotation"/>

</context:component-scan>

  - 스캐닝 원칙 

+ Component scanning should ONLY be configured in the bootstrap config file, not in every XML config file

+ Do NOT also include the <context:annotation-config/> directive, it is automatically included by component scan

+ Do NOT start scanning from “com” and/or “org”, as this will scan ALL sub packages in all of the project and jars for candidates!

+ Be as specific as possible with the packages

+ Do NOT cross application boundaries with component-scan

  + Create an applicationContext-services.xml for scanning services

  + Create an applicationContext-persistence.xml for persistence and entity beans

  + Create an applicationContext-webmvc.xml for persistence and entity beans

  + Create an applicationContext-webservice.xml for web service beans

  + Import these references into the applicationContext-bootstrap.xml to these elements


Why separate the discovery files into layer specific configuration?

  + Unit testing is easier as discovery of beans is more specific

  + Allows the project to be separated into multiple Jar/Wars

  + Lowers risk of widely scoped discovery issues, overscanning and beans being replaced by multiple scanners



<참조>

  - Eclipse Theme 사용방법

  - STS + myBatis + RESTful 설정 및 테스트

  - Eclipse Juno기반 Spring MVC with maven으로 만드는 과정

  - Maven Console 기반 webapp RESTful 서비스 만드는 과정

  - AngularJS + SpringMVC 샘플 프로젝트

  - Eclipse에서 Maven 개발환경 설정

  - Spring에서 Enterprise 환경 설정 원칙

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