BAEL-5864 - Getting the Current ApplicationContext in Spring (#13433)

spring-core-6/src/main/java/com/baeldung/applicationcontext/ApplicationContextProvider.java

@@ -0,0 +1,20 @@
+package com.baeldung.applicationcontext;
+
+import org.springframework.beans.BeansException;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ApplicationContextProvider implements ApplicationContextAware {
+    private static ApplicationContext applicationContext;
+
+    @Override
+    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
+        ApplicationContextProvider.applicationContext = applicationContext;
+    }
+
+    public static ApplicationContext getApplicationContext() {
+        return applicationContext;
+    }
+}

spring-core-6/src/main/java/com/baeldung/applicationcontext/ItemService.java

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+package com.baeldung.applicationcontext;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class ItemService {
+
+    public String getItem(){
+        return "New Item";
+    }
+}

spring-core-6/src/main/java/com/baeldung/applicationcontext/MyBean.java

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+package com.baeldung.applicationcontext;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.stereotype.Component;
+
+@Component
+public class MyBean {
+
+    @Autowired
+    private ApplicationContext applicationContext;
+
+    public ApplicationContext getApplicationContext() {
+        return applicationContext;
+    }
+
+}

spring-core-6/src/test/java/com/baeldung/applicationcontext/ApplicationContextProviderUnitTest.java

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+package com.baeldung.applicationcontext;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@ContextConfiguration(classes = TestContextConfig.class)
+@ExtendWith(SpringExtension.class)
+class ApplicationContextProviderUnitTest {
+
+    @Test
+    void whenGetApplicationContext_thenReturnApplicationContext() {
+        ApplicationContext context = ApplicationContextProvider.getApplicationContext();
+        assertNotNull(context);
+        System.out.printf("ApplicationContext has %d beans %n", context.getBeanDefinitionCount());
+    }
+
+    @Test
+    void whenGetBean_thenReturnItemServiceReference() {
+        ApplicationContext context = ApplicationContextProvider.getApplicationContext();
+        assertNotNull(context);
+
+        ItemService itemService = context.getBean(ItemService.class);
+        assertNotNull(context);
+
+        System.out.println(itemService.getItem());
+    }
+}

spring-core-6/src/test/java/com/baeldung/applicationcontext/MyBeanUnitTest.java

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+package com.baeldung.applicationcontext;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@ContextConfiguration(classes = TestContextConfig.class)
+@ExtendWith(SpringExtension.class)
+class MyBeanUnitTest {
+
+    @Autowired
+    MyBean myBean;
+
+    @Test
+    void whenGetApplicationContext_thenReturnApplicationContext() {
+        assertNotNull(myBean);
+        ApplicationContext context = myBean.getApplicationContext();
+        assertNotNull(context);
+
+        System.out.printf("ApplicationContext has %d beans %n", context.getBeanDefinitionCount());
+    }
+
+}

spring-core-6/src/test/java/com/baeldung/applicationcontext/TestContextConfig.java

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+package com.baeldung.applicationcontext;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("com.baeldung.applicationcontext")
+public class TestContextConfig {
+
+
+}