BAEL-4871 Spring Conditional Annotations

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

@@ -0,0 +1,16 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@Conditional(IsDevEnvCondition.class)
+public class DevEnvLoggingConfiguration {
+
+    @Bean
+    @Conditional(IsDevEnvCondition.class)
+    LoggingService loggingService() {
+        return new LoggingService();
+    }
+}

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

@@ -0,0 +1,13 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+public class IsDevEnvCondition implements Condition {
+
+    @Override
+    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+        return System.getProperty("env").equals("dev");;
+    }
+}

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

@@ -0,0 +1,15 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.apache.commons.lang3.SystemUtils;
+
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+public class IsWindowsCondition implements Condition {
+
+    @Override
+    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+        return SystemUtils.IS_OS_WINDOWS;;
+    }
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/conditional/Java8Condition.java

@@ -0,0 +1,14 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnJava;
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+public class Java8Condition implements Condition {
+
+    @Override
+    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+        return ConditionalOnJava.JavaVersion.getJavaVersion().equals(ConditionalOnJava.JavaVersion.EIGHT);
+    }
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/conditional/Java8DependedService.java

@@ -0,0 +1,9 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.context.annotation.Conditional;
+import org.springframework.stereotype.Service;
+
+@Service
+@Conditional(Java8Condition.class)
+public class Java8DependedService {
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/conditional/Java8OrJava9.java

@@ -0,0 +1,18 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
+import org.springframework.context.annotation.Conditional;
+
+public class Java8OrJava9 extends AnyNestedCondition  {
+    Java8OrJava9() {
+        super(ConfigurationPhase.REGISTER_BEAN);
+    }
+
+    @Conditional(Java8Condition.class)
+    static class Java8 {
+    }
+
+    @Conditional(Java9Condition.class)
+    static class Java9 {
+    }
+}

spring-boot-modules/spring-boot-annotations/src/main/java/com/baeldung/annotations/conditional/Java9Condition.java

@@ -0,0 +1,14 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnJava;
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+public class Java9Condition implements Condition {
+
+    @Override
+    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+        return ConditionalOnJava.JavaVersion.getJavaVersion().equals(ConditionalOnJava.JavaVersion.NINE);
+    }
+}

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

@@ -0,0 +1,20 @@
+package java.com.baeldung.annotations.conditional;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnJava;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.stereotype.Service;
+
+@Service
+@Conditional(IsDevEnvCondition.class)
+@ConditionalOnProperty(
+        value = "logging.enabled",
+        havingValue = "true",
+        matchIfMissing = true)
+@ConditionalOnExpression("${logging.enabled:true} and ${logging.level:DEBUG}")
+@ConditionalOnJava(ConditionalOnJava.JavaVersion.EIGHT)
+@Conditional(IsWindowsCondition.class)
+@Conditional(Java8Condition.class)
+public class LoggingService {
+}