Merge pull request #4542 from eugenp/prototype-bean-function

add prototype bean ex with function

spring-core/src/main/java/com/baeldung/config/scope/AppConfigFunctionBean.java

@@ -0,0 +1,31 @@
+package com.baeldung.config.scope;
+
+import java.util.function.Function;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Scope;
+
+import com.baeldung.scope.prototype.PrototypeBean;
+import com.baeldung.scope.singletone.SingletonFunctionBean;
+
+@Configuration
+public class AppConfigFunctionBean {
+
+    @Bean
+    public Function<String, PrototypeBean> beanFactory() {
+        return name -> prototypeBeanWithParam(name);
+    } 
+
+    @Bean
+    @Scope(value = "prototype")
+    public PrototypeBean prototypeBeanWithParam(String name) {
+       return new PrototypeBean(name);
+    }
+    
+    @Bean
+    public SingletonFunctionBean singletonFunctionBean() {
+        return new SingletonFunctionBean();
+    }
+    
+}

spring-core/src/main/java/com/baeldung/scope/AppConfig.java

@@ -40,4 +40,5 @@ public class AppConfig {
     public SingletonObjectFactoryBean singletonObjectFactoryBean() {
         return new SingletonObjectFactoryBean();
     }
+    
 }

spring-core/src/main/java/com/baeldung/scope/AppProxyScopeConfig.java

@@ -2,6 +2,7 @@ package com.baeldung.scope;
 
 import com.baeldung.scope.prototype.PrototypeBean;
 import com.baeldung.scope.singletone.SingletonBean;
+
 import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.context.annotation.*;
 
@@ -19,4 +20,5 @@ public class AppProxyScopeConfig {
     public SingletonBean singletonBean() {
         return new SingletonBean();
     }
+    
 }

spring-core/src/main/java/com/baeldung/scope/prototype/PrototypeBean.java

@@ -9,4 +9,20 @@ public class PrototypeBean {
     public PrototypeBean() {
         logger.info("Prototype instance created");
     }
+    
+    private String name;
+    
+    public PrototypeBean(String name) {
+        this.name = name;
+        logger.info("Prototype instance " + name + " created");
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+    
 }

spring-core/src/main/java/com/baeldung/scope/singletone/SingletonFunctionBean.java

@@ -0,0 +1,19 @@
+package com.baeldung.scope.singletone;
+
+import java.util.function.Function;
+
+import org.springframework.beans.factory.annotation.Autowired;
+
+import com.baeldung.scope.prototype.PrototypeBean;
+
+public class SingletonFunctionBean {
+    
+    @Autowired
+    private Function<String, PrototypeBean> beanFactory;
+    
+    public PrototypeBean getPrototypeInstance(String name) {
+        PrototypeBean bean = beanFactory.apply(name);
+        return bean;
+    }
+
+}

spring-core/src/test/java/com/baeldung/scope/PrototypeBeanInjectionIntegrationTest.java

@@ -1,6 +1,7 @@
 package com.baeldung.scope;
 
 import com.baeldung.scope.prototype.PrototypeBean;
+import com.baeldung.scope.singletone.SingletonFunctionBean;
 import com.baeldung.scope.singletone.SingletonLookupBean;
 import com.baeldung.scope.singletone.SingletonObjectFactoryBean;
 import com.baeldung.scope.singletone.SingletonProviderBean;
@@ -58,4 +59,5 @@ public class PrototypeBeanInjectionIntegrationTest {
 
         Assert.assertTrue("New instance expected", firstInstance != secondInstance);
     }
+    
 }

spring-core/src/test/java/com/baeldung/scope/PrototypeFunctionBeanIntegrationTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.scope;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.support.AbstractApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import com.baeldung.config.scope.AppConfigFunctionBean;
+import com.baeldung.scope.prototype.PrototypeBean;
+import com.baeldung.scope.singletone.SingletonFunctionBean;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(loader = AnnotationConfigContextLoader.class, classes = AppConfigFunctionBean.class)
+public class PrototypeFunctionBeanIntegrationTest {
+
+    @Test
+    public void givenPrototypeInjection_WhenFunction_ThenNewInstanceReturn() {
+
+        AbstractApplicationContext context = new AnnotationConfigApplicationContext(AppConfigFunctionBean.class);
+
+        SingletonFunctionBean firstContext = context.getBean(SingletonFunctionBean.class);
+        SingletonFunctionBean secondContext = context.getBean(SingletonFunctionBean.class);
+
+        PrototypeBean firstInstance = firstContext.getPrototypeInstance("instance1");
+        PrototypeBean secondInstance = secondContext.getPrototypeInstance("instance2");
+
+        Assert.assertTrue("New instance expected", firstInstance != secondInstance);
+    }
+    
+}