BAEL-4290: tracking down cause of Spring's “not eligible for auto-proxying” (#10593)

2021-03-30 17:53:35 +02:00
parent eb35265244
commit ac33d1d438
9 changed files with 258 additions and 0 deletions
@@ -0,0 +1,12 @@
+package com.baeldung.component.autoproxying;
+
+import lombok.Getter;
+import org.springframework.stereotype.Component;
+
+@Getter
+@Component
+public class DataCache {
+    @RandomInt(min = 2, max = 10)
+    private int group;
+    private String name;
+}
@@ -0,0 +1,33 @@
+package com.baeldung.component.autoproxying;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.util.ReflectionUtils;
+
+import java.lang.reflect.Field;
+
+public class EligibleForAutoProxyRandomIntProcessor implements BeanPostProcessor {
+    private final RandomIntGenerator randomIntGenerator;
+
+    @Lazy
+    public EligibleForAutoProxyRandomIntProcessor(RandomIntGenerator randomIntGenerator) {
+        this.randomIntGenerator = randomIntGenerator;
+    }
+
+    @Override
+    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+        Field[] fields = bean.getClass().getDeclaredFields();
+        for (Field field : fields) {
+            RandomInt injectRandomInt = field.getAnnotation(RandomInt.class);
+            if (injectRandomInt != null) {
+                int min = injectRandomInt.min();
+                int max = injectRandomInt.max();
+                int randomValue = randomIntGenerator.generate(min, max);
+                field.setAccessible(true);
+                ReflectionUtils.setField(field, bean, randomValue);
+            }
+        }
+        return bean;
+    }
+}
@@ -0,0 +1,31 @@
+package com.baeldung.component.autoproxying;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.util.ReflectionUtils;
+
+import java.lang.reflect.Field;
+
+public class NotEligibleForAutoProxyRandomIntProcessor implements BeanPostProcessor {
+    private final RandomIntGenerator randomIntGenerator;
+
+    public NotEligibleForAutoProxyRandomIntProcessor(RandomIntGenerator randomIntGenerator) {
+        this.randomIntGenerator = randomIntGenerator;
+    }
+
+    @Override
+    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+        Field[] fields = bean.getClass().getDeclaredFields();
+        for (Field field : fields) {
+            RandomInt injectRandomInt = field.getAnnotation(RandomInt.class);
+            if (injectRandomInt != null) {
+                int min = injectRandomInt.min();
+                int max = injectRandomInt.max();
+                int randomValue = randomIntGenerator.generate(min, max);
+                field.setAccessible(true);
+                ReflectionUtils.setField(field, bean, randomValue);
+            }
+        }
+        return bean;
+    }
+}
@@ -0,0 +1,11 @@
+package com.baeldung.component.autoproxying;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(RetentionPolicy.RUNTIME)
+public @interface RandomInt {
+    int min();
+
+    int max();
+}
@@ -0,0 +1,21 @@
+package com.baeldung.component.autoproxying;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+
+@Slf4j
+@Component
+public class RandomIntGenerator {
+    private final Random random = new Random();
+    private final DataCache dataCache;
+
+    public RandomIntGenerator(DataCache dataCache) {
+        this.dataCache = dataCache;
+    }
+
+    public int generate(int min, int max) {
+        return random.nextInt(max - min) + min;
+    }
+}