Spring Framework - @Scope Examples

    @Bean
    @Scope(WebApplicationContext.SCOPE_SESSION)
    public Visitor visitor(HttpServletRequest request){
         return new Visitor(request.getRemoteAddr());
    }

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class MyPrototypeBean {

    @Autowired
    @Qualifier("basic-service")
    private MyService myService;

    public void doSomething(){
        System.out.println(myService.getMessage());
    }
}

@Configuration
public class AppConfig {

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public MyPrototypeBean prototypeBean() {
        return new MyPrototypeBean();
    }

    @Bean
    public MySingletonBean singletonBean() {
        return new MySingletonBean();
    }

    public static void main(String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);
        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
        Thread.sleep(1000);

        bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
    }
}

@Configuration
public class AppConfig {

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public MyPrototypeBean prototypeBean() {
        return new MyPrototypeBean();
    }

    @Bean
    public MySingletonBean singletonBean() {
        return new MySingletonBean();
    }

    public static void main(String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);
        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
        Thread.sleep(1000);

        bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
    }
}

@Configuration
@ComponentScan(basePackageClasses = MySingletonBean.class)
public class AppConfig {

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public MyPrototypeBean prototypeBean() {
        return new MyPrototypeBean();
    }

    public static void main(String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);

        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();

        Thread.sleep(1000);

        bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
    }
}

import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

@Configuration
public class AppConfig {

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public MyPrototypeBean prototypeBean() {
        return new MyPrototypeBean();
    }

    @Bean
    public MySingletonBean singletonBean() {
        return new MySingletonBean();
    }

    public static void main(String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);

        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
        Thread.sleep(1000);

        bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
    }
}

@Configuration
public class AppConfig {

    @Bean
    @Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE,
                        proxyMode = ScopedProxyMode.TARGET_CLASS)
    public MyPrototypeBean prototypeBean () {
        return new MyPrototypeBean();
    }

    @Bean
    public MySingletonBean singletonBean () {
        return new MySingletonBean();
    }

    public static void main (String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                            new AnnotationConfigApplicationContext(AppConfig.class);
        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
        Thread.sleep(1000);

        bean.showMessage();
    }
}

@Configuration
public class AppConfig {

    @Bean
    @Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE,
                        proxyMode = ScopedProxyMode.INTERFACES)
    public IPrototype prototypeBean () {
        return new MyPrototypeBean();
    }

    @Bean
    public MySingletonBean singletonBean () {
        return new MySingletonBean();
    }

    public static void main (String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                            new AnnotationConfigApplicationContext(AppConfig.class);
        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
        Thread.sleep(1000);

        bean.showMessage();
    }
}

import com.logicbig.example.bean.UserRegistrationBean;
import com.logicbig.example.bean.UserRegistrationBeanImpl;
import com.logicbig.example.bean.UserRegistrationValidator;
import com.logicbig.example.service.RegistrationService;
import com.logicbig.example.service.RegistrationServiceImpl;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;


@Configuration
public class Config {

    @Bean
    public UserRegistrationValidator validator () {
        return new UserRegistrationValidator();
    }

    @Bean
    public RegistrationService registrationService () {
        return new RegistrationServiceImpl();
    }

    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    @Bean
    public UserRegistrationBean userRegistrationBean () {
        return new UserRegistrationBeanImpl();
    }
}

package com.logicbig.example;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import org.springframework.web.context.WebApplicationContext;
import java.io.Serializable;

@Component
@Scope(WebApplicationContext.SCOPE_REQUEST)
public class EmployeeDetails implements Serializable {
    private Employee employee;
    private int lastYearSalary;

    public void setEmployee(Employee employee) {
        this.employee = employee;
    }

    public Employee getEmployee() {
        return employee;
    }

    public int getLastYearSalary() {
        return lastYearSalary;
    }

    public void setLastYearSalary(int lastYearSalary) {
        this.lastYearSalary = lastYearSalary;
    }
}

package com.logicbig.example;

import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;
import org.springframework.stereotype.Component;
import org.springframework.web.context.WebApplicationContext;
import java.io.Serializable;
import java.time.LocalDateTime;

@Component
@Scope(value = WebApplicationContext.SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)
public class VisitorInfo implements Serializable {
    private String name;
    private int visitCounter;
    private LocalDateTime firstVisitTime;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getVisitCounter() {
        return visitCounter;
    }

    public void setVisitCounter(int visitCounter) {
        this.visitCounter = visitCounter;
    }

    public LocalDateTime getFirstVisitTime() {
        return firstVisitTime;
    }

    public void setFirstVisitTime(LocalDateTime firstVisitTime) {
        this.firstVisitTime = firstVisitTime;
    }

    public void increaseVisitorCounter() {
        visitCounter++;
    }
}

package com.logicbig.example.app1;

import com.logicbig.example.AppLevelPreference;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@EnableWebMvc
@Configuration
public class MyWebConfig {

    @Bean
    public MyController myController() {
        return new MyController();
    }

    @Bean
    @Scope(value = WebApplicationContext.SCOPE_APPLICATION)
    public AppLevelPreference pref() {
        return new AppLevelPreference();
    }

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
}

@Configuration
public class AppConfig {

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public MyPrototypeBean prototypeBean() {
        return new MyPrototypeBean();
    }

    @Bean
    public MySingletonBean singletonBean() {
        return new MySingletonBean();
    }

    public static void main(String[] args) throws InterruptedException {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);
        MySingletonBean bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
        Thread.sleep(1000);

        bean = context.getBean(MySingletonBean.class);
        bean.showMessage();
    }
}