fix: #40342 Add static locations for livereload

Author: itsAkshayDubey

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/DevToolsProperties.java

@@ -30,6 +30,7 @@
  *
  * @author Phillip Webb
  * @author Stephane Nicoll
+ * @author Akshay Dubey
  * @since 1.3.0
  */
 @ConfigurationProperties(prefix = "spring.devtools")
@@ -198,6 +199,22 @@ public static class Livereload {
 		 */
 		private int port = 35729;
 
+		/**
+		 * Additional paths to watch for changes.
+		 */
+		private List<File> additionalPaths = new ArrayList<>();
+
+		/**
+		 * Amount of time to wait between polling for classpath changes.
+		 */
+		private Duration pollInterval = Duration.ofSeconds(1);
+
+		/**
+		 * Amount of quiet time required without any classpath changes before a reload is
+		 * triggered.
+		 */
+		private Duration quietPeriod = Duration.ofMillis(400);
+
 		public boolean isEnabled() {
 			return this.enabled;
 		}
@@ -214,6 +231,30 @@ public void setPort(int port) {
 			this.port = port;
 		}
 
+		public List<File> getAdditionalPaths() {
+			return this.additionalPaths;
+		}
+
+		public void setAdditionalPaths(List<File> additionalPaths) {
+			this.additionalPaths = additionalPaths;
+		}
+
+		public Duration getPollInterval() {
+			return this.pollInterval;
+		}
+
+		public void setPollInterval(Duration pollInterval) {
+			this.pollInterval = pollInterval;
+		}
+
+		public Duration getQuietPeriod() {
+			return this.quietPeriod;
+		}
+
+		public void setQuietPeriod(Duration quietPeriod) {
+			this.quietPeriod = quietPeriod;
+		}
+
 	}
 
 }

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java

@@ -23,6 +23,7 @@
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
+import org.springframework.beans.factory.DisposableBean;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
@@ -57,6 +58,7 @@
  * @author Phillip Webb
  * @author Andy Wilkinson
  * @author Vladimir Tsanev
+ * @author Akshay Dubey
  * @since 1.3.0
  */
 @AutoConfiguration
@@ -89,6 +91,21 @@ LiveReloadServerEventListener liveReloadServerEventListener(OptionalLiveReloadSe
 			return new LiveReloadServerEventListener(liveReloadServer);
 		}
 
+		@Bean
+		LiveReloadForAdditionalPaths liveReloadForAdditionalPaths(LiveReloadServer liveReloadServer,
+				DevToolsProperties properties, FileSystemWatcher fileSystemWatcher) {
+			return new LiveReloadForAdditionalPaths(liveReloadServer,
+    				properties.getLivereload().getAdditionalPaths(),fileSystemWatcher);
+		}
+
+		@Bean
+ 		FileSystemWatcher fileSystemWatcher(DevToolsProperties properties) {
+   			return new FileSystemWatcher(true,
+     				properties.getLivereload().getPollInterval(),
+    				properties.getLivereload().getQuietPeriod()
+   			);
+		}
+
 	}
 
 	/**
@@ -216,4 +233,27 @@ public void onApplicationEvent(ClassPathChangedEvent event) {
 
 	}
 
+		static class LiveReloadForAdditionalPaths implements DisposableBean {
+
+		private final FileSystemWatcher fileSystemWatcher;
+
+		@Override
+  		public void destroy() throws Exception {
+   			if(this.fileSystemWatcher!=null)
+    			this.fileSystemWatcher.stop();
+  		}
+
+  		public LiveReloadForAdditionalPaths( LiveReloadServer liveReloadServer, List<File> staticLocations, FileSystemWatcher fileSystemWatcher) {
+   			this.fileSystemWatcher = fileSystemWatcher;
+
+   			for (File path : staticLocations) {
+   		 		this.fileSystemWatcher.addSourceDirectory(path.getAbsoluteFile());
+   			}
+
+   			this.fileSystemWatcher.addListener(__ -> liveReloadServer.triggerReload());
+
+   			this.fileSystemWatcher.start();
+  		}
+	}
+
 }