scopes examples

spring-all/src/main/java/org/baeldung/scopes/HelloMessageGenerator.java

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+package org.baeldung.scopes;
+
+public class HelloMessageGenerator {
+
+	private String message;
+
+	public String getMessage() {
+		return message;
+	}
+
+	public void setMessage(final String message) {
+		this.message = message;
+	}
+
+}

spring-all/src/main/java/org/baeldung/scopes/Person.java

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+package org.baeldung.scopes;
+
+public class Person {
+	private String name;
+	private int age;
+
+	public Person() {
+	}
+
+	public Person(final String name, final int age) {
+		super();
+		this.name = name;
+		this.age = age;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(final String name) {
+		this.name = name;
+	}
+
+	public int getAge() {
+		return age;
+	}
+
+	public void setAge(final int age) {
+		this.age = age;
+	}
+
+	@Override
+	public String toString() {
+		return "Person [name=" + name + ", age=" + age + "]";
+	}
+
+}

spring-all/src/main/java/org/baeldung/scopes/ScopesController.java

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+package org.baeldung.scopes;
+
+import javax.annotation.Resource;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+public class ScopesController {
+
+	@Resource(name = "requestMessage")
+	HelloMessageGenerator firstRequestMessage;
+
+	@Resource(name = "requestMessage")
+	HelloMessageGenerator secondRequestMessage;
+
+	@Resource(name = "sessionMessage")
+	HelloMessageGenerator firstSessionMessage;
+
+	@Resource(name = "sessionMessage")
+	HelloMessageGenerator secondSessionMessage;
+
+	@RequestMapping("/scopes")
+	public String getScopes() {
+		return "scopesExample";
+	}
+
+	@RequestMapping("/scopes/firstRequest")
+	public String getFirstRequest(final Model model) {
+		firstRequestMessage.setMessage("Good morning!");
+		firstSessionMessage.setMessage("Good afternoon!");
+		model.addAttribute("requestMessage", firstRequestMessage.getMessage());
+		model.addAttribute("sessionMessage", firstSessionMessage.getMessage());
+		return "scopesFirstRequest";
+	}
+
+	@RequestMapping("/scopes/secondRequest")
+	public String getSecondRequest(final Model model) {
+		secondRequestMessage.setMessage("Good evening!");
+		model.addAttribute("requestMessage", secondRequestMessage.getMessage());
+		model.addAttribute("sessionMessage", secondSessionMessage.getMessage());
+		return "scopesSecondRequest";
+	}
+
+}

spring-all/src/main/java/org/baeldung/spring/config/ScopesConfig.java

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+package org.baeldung.spring.config;
+
+import org.baeldung.scopes.HelloMessageGenerator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Scope;
+import org.springframework.context.annotation.ScopedProxyMode;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.view.JstlView;
+import org.springframework.web.servlet.view.UrlBasedViewResolver;
+
+@Configuration
+@ComponentScan("org.baeldung.scopes")
+@EnableWebMvc
+public class ScopesConfig {
+	@Bean
+	public UrlBasedViewResolver setupViewResolver() {
+		final UrlBasedViewResolver resolver = new UrlBasedViewResolver();
+		resolver.setPrefix("/WEB-INF/view/");
+		resolver.setSuffix(".jsp");
+		resolver.setViewClass(JstlView.class);
+		return resolver;
+	}
+
+	@Bean
+	@Scope(value = WebApplicationContext.SCOPE_REQUEST, proxyMode = ScopedProxyMode.TARGET_CLASS)
+	public HelloMessageGenerator requestMessage() {
+		return new HelloMessageGenerator();
+	}
+
+	@Bean
+	@Scope(value = WebApplicationContext.SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)
+	public HelloMessageGenerator sessionMessage() {
+		return new HelloMessageGenerator();
+	}
+
+}