fix spring listener component modification in spring boot code analysis

ipipman · ipipman · commit 39eefb680e22 · 2021-08-09T16:05:55.000+08:00
diff --git a/springboot-source-code-analysis/pom.xml b/springboot-source-code-analysis/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.7.RELEASE</version>
+        <version>2.4.0</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.ipman.source.code.analysis.springboot</groupId>
diff --git a/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/AbstractEventMulticaster.java b/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/AbstractEventMulticaster.java
@@ -1,5 +1,8 @@
 package com.example.springboot.source.code.analysis.event;
 
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
@@ -14,10 +17,12 @@
 
 
 // 抽象的事件广播器
+@Component
 public abstract class AbstractEventMulticaster implements EventMulticaster {
 
     // 事件监听器列表
-    private List<WeatherListener> listenerList = new CopyOnWriteArrayList<>();
+    @Autowired
+    private List<WeatherListener> listenerList;
 
     @Override
     public void multicastEvent(WeatherEvent event) {
diff --git a/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/RainListener.java b/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/RainListener.java
@@ -1,5 +1,7 @@
 package com.example.springboot.source.code.analysis.event;
 
+import org.springframework.stereotype.Component;
+
 /**
  * Created by ipipman on 2021/8/3.
  *
@@ -11,6 +13,7 @@
 
 
 // 下雨监听器
+@Component
 public class RainListener implements WeatherListener {
 
     @Override
diff --git a/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/SnowListener.java b/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/SnowListener.java
@@ -1,5 +1,7 @@
 package com.example.springboot.source.code.analysis.event;
 
+import org.springframework.stereotype.Component;
+
 /**
  * Created by ipipman on 2021/8/3.
  *
@@ -10,6 +12,7 @@
  */
 
 // 下雪监听器
+@Component
 public class SnowListener implements WeatherListener {
 
     @Override
diff --git a/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/WeatherEvent.java b/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/WeatherEvent.java
@@ -15,4 +15,5 @@ public abstract class WeatherEvent {
 
     // 获取当前天气的事件
     public abstract String getWeather();
+
 }
diff --git a/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/WeatherEventMulticaster.java b/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/WeatherEventMulticaster.java
@@ -1,5 +1,7 @@
 package com.example.springboot.source.code.analysis.event;
 
+import org.springframework.stereotype.Component;
+
 /**
  * Created by ipipman on 2021/8/3.
  *
@@ -10,6 +12,7 @@
  */
 
 // 天气事件广播器
+@Component
 public class WeatherEventMulticaster extends AbstractEventMulticaster {
 
     @Override
diff --git a/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/WeatherRunListener.java b/springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/event/WeatherRunListener.java
@@ -0,0 +1,35 @@
+package com.example.springboot.source.code.analysis.event;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * Created by ipipman on 2021/8/9.
+ *
+ * @version V1.0
+ * @Package com.example.springboot.source.code.analysis.event
+ * @Description: (用一句话描述该文件做什么)
+ * @date 2021/8/9 3:46 下午
+ */
+
+@Component
+public class WeatherRunListener {
+
+    @Autowired
+    private WeatherEventMulticaster weatherEventMulticaster;
+
+    // 下雪事件
+    public void snow(){
+        weatherEventMulticaster.multicastEvent(new SnowEvent());
+    }
+
+    // 下雨事件
+    public void rain(){
+        weatherEventMulticaster.multicastEvent(new RainEvent());
+    }
+
+    // 天津监听器
+    public void addListener(WeatherListener listener){
+        weatherEventMulticaster.addListener(listener);
+    }
+}
diff --git a/springboot-source-code-analysis/src/test/java/com/example/springboot/source/code/analysis/SpringbootSourceCodeAnalysisApplicationTests.java b/springboot-source-code-analysis/src/test/java/com/example/springboot/source/code/analysis/SpringbootSourceCodeAnalysisApplicationTests.java
@@ -1,13 +1,29 @@
 package com.example.springboot.source.code.analysis;
 
-import org.junit.Test;
+import com.example.springboot.source.code.analysis.event.RainListener;
+import com.example.springboot.source.code.analysis.event.WeatherRunListener;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
 class SpringbootSourceCodeAnalysisApplicationTests {
 
+    // 引入事件监听器
+    @Autowired
+    private WeatherRunListener weatherRunListener;
+
+    // 测试事件监听器
+    @Test
+    public void testEvent(){
+        weatherRunListener.addListener(new RainListener());
+        weatherRunListener.snow();
+        weatherRunListener.rain();
+    }
+
     @Test
     void contextLoads() {
     }
 
+
 }

Original file line number	Diff line number	Diff line change
`@@ -15,4 +15,5 @@ public abstract class WeatherEvent {`
`15`	`15`
`16`	`16`	`// 获取当前天气的事件`
`17`	`17`	`public abstract String getWeather();`
	`18`	`+`
`18`	`19`	`}`