Add dependency injection to the AspectJ interceptor

src/main/java/com/madadipouya/sample/aspectj/interceptor/LoggingInterceptor.java

@@ -1,22 +1,21 @@
 package com.madadipouya.sample.aspectj.interceptor;
 
+import com.madadipouya.sample.aspectj.service.LoggingService;
 import org.aspectj.lang.annotation.Aspect;
 import org.aspectj.lang.annotation.Before;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.stereotype.Component;
+import org.springframework.beans.factory.annotation.Autowired;
 
 import java.time.ZoneOffset;
 import java.time.ZonedDateTime;
 
 @Aspect
-@Component
 public class LoggingInterceptor {
 
-    private static final Logger logger = LoggerFactory.getLogger(LoggingInterceptor.class);
+    @Autowired
+    private LoggingService loggingService;
 
     @Before(value = "execution(* com.madadipouya.sample.aspectj.controller.UserController.getUsersInternal(..))")
     public void addCommandDetailsToMessage() throws Throwable {
-        logger.info("User controller getUsers method called at {}", ZonedDateTime.now(ZoneOffset.UTC));
+        loggingService.log(String.format("User controller getUsers method called at %s", ZonedDateTime.now((ZoneOffset.UTC))));
     }
 }

src/main/java/com/madadipouya/sample/aspectj/interceptor/config/LoggingInterceptorConfig.java

@@ -0,0 +1,15 @@
+package com.madadipouya.sample.aspectj.interceptor.config;
+
+import com.madadipouya.sample.aspectj.interceptor.LoggingInterceptor;
+import org.aspectj.lang.Aspects;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class LoggingInterceptorConfig {
+
+    @Bean
+    public LoggingInterceptor getAutowireCapableLoggingInterceptor() {
+        return Aspects.aspectOf(LoggingInterceptor.class);
+    }
+}

src/main/java/com/madadipouya/sample/aspectj/service/LoggingService.java

@@ -0,0 +1,6 @@
+package com.madadipouya.sample.aspectj.service;
+
+public interface LoggingService {
+
+    void log(String message);
+}

src/main/java/com/madadipouya/sample/aspectj/service/impl/DefaultLoggingService.java

@@ -0,0 +1,22 @@
+package com.madadipouya.sample.aspectj.service.impl;
+
+import com.madadipouya.sample.aspectj.service.LoggingService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+
+/**
+ * A dummy implementation of logging service,
+ * just to inject it in {@link com.madadipouya.sample.aspectj.interceptor.LoggingInterceptor}
+ * that's managed by AspectJ
+ */
+@Service
+public class DefaultLoggingService implements LoggingService {
+
+    private static final Logger logger = LoggerFactory.getLogger("sample-spring-aspectj");
+
+    @Override
+    public void log(String message) {
+        logger.info(message);
+    }
+}