Initial classes

spring-all/src/main/java/org/baeldung/profiles/DatasourceConfig.java

@@ -1,5 +1,5 @@
 package org.baeldung.profiles;
 
 public interface DatasourceConfig {
-    public void setup();
+    void setup();
 }

spring-all/src/main/java/org/baeldung/startup/InitializingBeanExampleBean.java

@@ -0,0 +1,12 @@
+package org.baeldung.startup;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.context.annotation.Scope;
+
+@Scope(value = "prototype")
+public class InitializingBeanExampleBean implements InitializingBean {
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+    }
+}

spring-all/src/main/java/org/baeldung/startup/LogicInConstructorExampleBean.java

@@ -0,0 +1,18 @@
+package org.baeldung.startup;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope(value = "prototype")
+public class LogicInConstructorExampleBean {
+
+    @Autowired
+    private Environment environment;
+
+    public LogicInConstructorExampleBean() {
+        environment.getActiveProfiles();
+    }
+}

spring-all/src/main/java/org/baeldung/startup/OnStartupApplicationListenerExampleBean.java

@@ -0,0 +1,4 @@
+package org.baeldung.startup;
+
+public class OnStartupApplicationListenerExampleBean {
+}

spring-all/src/main/java/org/baeldung/startup/PostConstructExampleBean.java

@@ -0,0 +1,15 @@
+package org.baeldung.startup;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+public class PostConstructExampleBean {
+
+    @Autowired
+    private Environment environment;
+
+    public PostConstructExampleBean() {
+    }
+}

spring-all/src/main/java/org/baeldung/startup/SpringStartupConfig.java

@@ -0,0 +1,10 @@
+package org.baeldung.startup;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("org.baeldung.startup")
+public class SpringStartupConfig {
+
+}

spring-all/src/test/java/org/baeldung/startup/SpringStartupTest.java

@@ -0,0 +1,25 @@
+package org.baeldung.startup;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.BeanCreationException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { SpringStartupConfig.class }, loader = AnnotationConfigContextLoader.class)
+public class SpringStartupTest {
+
+    @Autowired
+    private ApplicationContext ctx;
+
+    @Test(expected = BeanCreationException.class)
+    public void whenInstantiating_shouldThrowNPE() throws Exception {
+        ctx.getBean(LogicInConstructorExampleBean.class);
+    }
+
+
+}