spring core advanced : template method

spring-core/advanced/src/test/java/com/example/advanced/trace/template/TemplateMethodTest.java

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+package com.example.advanced.trace.template;
+
+import com.example.advanced.trace.template.code.AbstractTemplate;
+import com.example.advanced.trace.template.code.SubClassLogic1;
+import com.example.advanced.trace.template.code.SubClassLogic2;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+
+@Slf4j
+public class TemplateMethodTest {
+
+    @Test
+    void templateMethodV0() {
+        logic1();
+        logic2();
+    }
+
+    private void logic1() {
+        long startTime = System.currentTimeMillis();
+        // 비즈니스 로직 실행
+        log.info("비즈니스 로직 실행1");
+        long endTime = System.currentTimeMillis();
+        long resultTime = endTime - startTime;
+        log.info("resultTime={}", resultTime);
+    }
+
+    private void logic2() {
+        long startTime = System.currentTimeMillis();
+        // 비즈니스 로직 실행
+        log.info("비즈니스 로직 실행2");
+        long endTime = System.currentTimeMillis();
+        long resultTime = endTime - startTime;
+        log.info("resultTime={}", resultTime);
+    }
+    /**
+     * 템플릿 메서드 패턴 적용
+     */
+    @Test
+    void templateMethodV1() {
+        AbstractTemplate template1 = new SubClassLogic1();
+        template1.execute();
+
+        AbstractTemplate template2 = new SubClassLogic2();
+        template2.execute();
+    }
+
+    @Test
+    void templateMethodV2() {
+        AbstractTemplate template1 = new AbstractTemplate() {
+            @Override
+            protected void call() {
+                log.info("비즈니스 로직1 실행");
+            }
+        };
+
+        template1.execute();
+
+        AbstractTemplate template2 = new AbstractTemplate() {
+            @Override
+            protected void call() {
+                log.info("비즈니스 로직2 실행");
+            }
+        };
+
+        template2.execute();
+    }
+}

spring-core/advanced/src/test/java/com/example/advanced/trace/template/code/AbstractTemplate.java

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+package com.example.advanced.trace.template.code;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public abstract class AbstractTemplate {
+
+    public void execute() {
+        long startTime = System.currentTimeMillis();
+        // 비즈니스 로직 실행
+        call(); // 상속
+        // 비즈니스 로직 종료
+        long endTime = System.currentTimeMillis();
+        long resultTime = endTime - startTime;
+        log.info("resultTime={}", resultTime);
+    }
+
+    protected abstract void call();
+}

spring-core/advanced/src/test/java/com/example/advanced/trace/template/code/SubClassLogic1.java

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+package com.example.advanced.trace.template.code;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class SubClassLogic1 extends AbstractTemplate{
+
+    @Override
+    protected void call() {
+        log.info("비즈니스 로직1 실행");
+    }
+}

spring-core/advanced/src/test/java/com/example/advanced/trace/template/code/SubClassLogic2.java

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+package com.example.advanced.trace.template.code;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class SubClassLogic2 extends AbstractTemplate{
+
+    @Override
+    protected void call() {
+        log.info("비즈니스 로직2 실행");
+    }
+}