Spring Basic Qualifier Autowired Annotation Project

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This is Instrument.java file having the source code to execute business logic.

package com.cv.spring.basic; /**  * @author Chandra Vardhan  */ public interface Instrument {   void play(); }

This is Instrumentalist.java file having the source code to execute business logic.

package com.cv.spring.basic; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import com.cv.spring.basic.model.City; /**  * @author Chandra Vardhan  */ public class Instrumentalist implements Performer {      private final static Logger LOGGER = Logger.getLogger(Instrumentalist.class);      @Autowired   @Qualifier("string2")   private String song;      @Autowired   private Instrument instrument;     private int age;     private City city;      public Instrumentalist() {   }   public int getAge() {     return age;   }   public void setAge(int age) {     this.age = age;   }   public Instrumentalist(Instrument instrument) {     this.instrument = instrument;   }   public Instrument getInstrument() {     return instrument;   }   public void setInstrument(Instrument instrument) {     this.instrument = instrument;   }   public String getSong() {     return song;   }   public void setSong(String song) {     this.song = song;   }   public City getCity() {     return city;   }   public void setCity(City city) {     this.city = city;   }   public void perform() {     LOGGER.info("Instrument is");     instrument.play();     LOGGER.info("Song : " + song);   } }

This is City.java file having the source code to execute business logic.

package com.cv.spring.basic.model; /**  * @author Chandra Vardhan  *  */ public class City {      private String name;   private String state;      private int population;   public String getName() {     return name;   }      public void setName(String name) {     this.name = name;   }      public String getState() {     return state;   }      public void setState(String state) {     this.state = state;   }      public int getPopulation() {     return population;   }      public void setPopulation(int population) {     this.population = population;   } }

This is Piano.java file having the source code to execute business logic.

package com.cv.spring.basic.model; import org.apache.log4j.Logger; import com.cv.spring.basic.Instrument; /**  * @author Chandra Vardhan  */ public class Piano implements Instrument {      private final static Logger LOGGER = Logger.getLogger(Piano.class);   public Piano() {   }   public void play() {     LOGGER.info("Piano :::: PLINK PLINK");   } }

This is Saxophone.java file having the source code to execute business logic.

package com.cv.spring.basic.model; import org.apache.log4j.Logger; import com.cv.spring.basic.Instrument; /**  * @author Chandra Vardhan  */ public class Saxophone implements Instrument {   private final static Logger LOGGER = Logger.getLogger(Saxophone.class);   public Saxophone() {   }   public void play() {     LOGGER.info("Saxophone ::: TOOT TOOT TOOT");   } }

This is Performer.java file having the source code to execute business logic.

package com.cv.spring.basic; /**  * @author Chandra Vardhan  */ public interface Performer {      public void perform(); }

This is Test.java file having the source code to execute business logic.

package com.cv.spring.basic; import org.springframework.context.ConfigurableApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; /**  * @author Chandra Vardhan  */ public class Test {      /**    *     */   public Test() {   }   /**    * @param args    */   public static void main(String[] args) {     ConfigurableApplicationContext applicationContext = new ClassPathXmlApplicationContext(         "spring-config.xml");     Performer performer = (Performer) applicationContext.getBean("instrumentalist");     performer.perform();   } }

This is pom.xml file having the entries of dependency jars and information to build the application .

<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">.0" encoding="UTF-8"?> <modelVersion>4.0.0</modelVersion> <groupId>com.cv.spring.annotation</groupId> <artifactId>SpringBasciQualifierAutowiredAnnotation</artifactId> <name>SpringBasciQualifierAutowiredAnnotation</name> <packaging>jar</packaging> <version>1.0</version> <properties> <java-version>1.8</java-version> <log4j-version>1.2.16</log4j-version> <org.springframework-version>4.1.6.RELEASE</org.springframework-version> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${org.springframework-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${org.springframework-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${org.springframework-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${org.springframework-version}</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>

This is spring-config.xml file having the spring configuration properties.

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" 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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd" default-init-method="make" default-destroy-method="breakVal"> <context:annotation-config></context:annotation-config> <bean id="instrumentalist" class="com.cv.spring.basic.Instrumentalist" /> <bean id="saxophone" class="com.cv.spring.basic.model.Saxophone" /> <bean id="string" class="java.lang.String"> <constructor-arg value="Chic chic chic..." /> </bean> <bean id="string2" class="java.lang.String"> <constructor-arg value="Chic buk chic buk..." /> </bean> </beans>

This is log4j.properties file having the entries for logging the information into the console/file.

#By default enabling Console appender # Root logger option log4j.rootLogger=INFO, stdout # Redirect log messages to console log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target=System.out log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%-5p [%c]:%L -->> %m%n # Redirect log messages to a log file #log4j.appender.file=org.apache.log4j.RollingFileAppender #log4j.appender.file.File=C:\servlet-application.log #log4j.appender.file.MaxFileSize=5MB #log4j.appender.file.MaxBackupIndex=10 #log4j.appender.file.layout=org.apache.log4j.PatternLayout #log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n