sync source code with article

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/ConditionalBeanConfiguration.java

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+package com.baeldung.annotations;
+
+import java.util.Properties;
+
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ConditionalBeanConfiguration {
+
+    @Conditional(HibernateCondition.class)
+    Properties additionalProperties() {
+        // application specific properties
+        return new Properties();
+    }
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/HealthCheckController.java

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+package com.baeldung.annotations;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HealthCheckController {
+
+    private static final String STATUS = "UP";
+    
+    @GetMapping("/health")
+    public ResponseEntity<String> healthCheck() {
+        return ResponseEntity.ok(STATUS);
+    }
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/HibernateCondition.java

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+package com.baeldung.annotations;
+
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+public class HibernateCondition implements Condition {
+
+    @Override
+    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+        // application specific condition check
+        return true;
+    }
+
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/MySQLAutoconfiguration.java

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+package com.baeldung.annotations;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+import javax.sql.DataSource;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnResource;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+import org.springframework.orm.jpa.JpaVendorAdapter;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+
+@Configuration
+@ConditionalOnClass(DataSource.class)
+public class MySQLAutoconfiguration {
+
+    @Bean
+    @ConditionalOnBean(name = "dataSource")
+    LocalContainerEntityManagerFactoryBean entityManagerFactory() throws IOException {
+      final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
+      em.setDataSource(dataSource());
+      em.setPackagesToScan(new String[] { "com.baeldung.persistence.model" });
+ 
+      final JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
+      em.setJpaVendorAdapter(vendorAdapter);
+      em.setJpaProperties(additionalProperties());
+      return em;
+    }
+    
+    @Bean
+    @ConditionalOnProperty(name = "usemysql", havingValue = "local")
+    DataSource dataSource() {
+        DriverManagerDataSource dataSource = new DriverManagerDataSource();
+        dataSource.setDriverClassName("org.hsqldb.jdbcDriver");
+        dataSource.setUrl("jdbc:hsqldb:mem:testdb");
+        dataSource.setUsername( "sa" );
+        dataSource.setPassword( "" );
+        return dataSource;
+    }
+    
+    @ConditionalOnResource(resources = "classpath:mysql.properties")
+    Properties additionalProperties() throws IOException {
+        final Properties additionalProperties = new Properties();
+        
+        try (InputStream inputStream = new ClassPathResource("classpath:mysql.properties").getInputStream()) {
+            additionalProperties.load(inputStream);
+        }
+        
+        return additionalProperties;
+    }
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/WebApplicationSpecificConfiguration.java

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+package com.baeldung.annotations;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class WebApplicationSpecificConfiguration {
+
+    @ConditionalOnWebApplication
+    HealthCheckController healthCheckController() {
+        return new HealthCheckController();
+    }
+}