PF4J+SpringBoot

plugin-common

pom.xml相关配置

<groupId>pub.qingyun</groupId>
<artifactId>plugin-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
<description>插件配置类</description><dependency><groupId>org.pf4j</groupId><artifactId>pf4j</artifactId><version>3.12.0</version>
</dependency><!--插件打包时使用的Maven插件,插件ID:Plugin-Id,使用mvn clean package 打出*jar-with-dependencies.jar的插件包-->
<build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-assembly-plugin</artifactId><configuration><archive><manifest><addClasspath>true</addClasspath></manifest><manifestEntries><Plugin-Id>common-impl</Plugin-Id><Plugin-Version>0.0.1</Plugin-Version></manifestEntries></archive><descriptorRefs><descriptorRef>jar-with-dependencies</descriptorRef></descriptorRefs></configuration><executions><execution><id>make-assembly</id><phase>package</phase><goals><goal>single</goal></goals></execution></executions></plugin></plugins>
</build>

插件服务接口

pub.qingyun.service.IExtensionHandler

public interface IExtensionHandler extends Runnable, ExtensionPoint {String execute(String param);
}

实现类

import org.pf4j.Extension;
import pub.qingyun.service.IExtensionHandler;@Extension
public class TestExtensionHandler implements IExtensionHandler {@Overridepublic void run() {System.out.println("TestExtensionHandler run...");}@Overridepublic String execute(String param) {System.out.println("TestExtensionHandler.execute...param=" + param);return param;}
}

plugin-spring-boot

pom.xml相关配置

<groupId>pub.qingyun</groupId>
<artifactId>plugin-spring-boot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>plugin-spring-boot</name>
<description>plugin-spring-boot</description><properties><java.version>1.8</java.version><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><spring-boot.version>2.6.13</spring-boot.version>
</properties>
<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>pub.qingyun</groupId><artifactId>plugin-common</artifactId><version>1.0-SNAPSHOT</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency>...
</dependencies>
<dependencyManagement><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring-boot.version}</version><type>pom</type><scope>import</scope></dependency></dependencies>
</dependencyManagement>

spring-boot

@Configuration
public class PluginConfig {// 插件目录,对应插件jar包/zip@Value("${pf4j.pluginPath}")private String pf4jPluginPath;@Beanpublic PluginManager initPluginManager() {Path pluginPath = Paths.get(pf4jPluginPath);PluginManager pluginManager = new JarPluginManager(pluginPath);//加载所有插件pluginManager.loadPlugins();//开启所有插件pluginManager.startPlugins();//启动指定插件
//        pluginManager.startPlugin("demo-plugin");//卸载插件
//        pluginManager.unloadPlugin("demo-plugin");return pluginManager;}
}

控制层实现

package pub.qingyun.controller;import lombok.extern.slf4j.Slf4j;
import org.pf4j.PluginManager;
import org.pf4j.PluginState;
import org.pf4j.PluginWrapper;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import pub.qingyun.service.impl.TestExtensionHandler;import javax.annotation.Resource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;/*** @author CQY* @version 1.0* @date 2024/7/17 14:19**/
@Slf4j
@RestController
public class PluginController {@Resourceprivate PluginManager pluginManager;/*** 打印所有插件信息** @return List<Map < String, Object>>*/@GetMapping(value = "/printAllPlugin")public ResponseEntity<List<Map<String, Object>>> printAllPlugin() {List<PluginWrapper> plugins = pluginManager.getPlugins();List<Map<String, Object>> collect = plugins.stream().map((item) -> {Map<String, Object> map = new HashMap<>();map.put("pluginId", item.getPluginId());map.put("pluginDescription", item.getDescriptor());map.put("pluginPath", item.getPluginPath());map.put("pluginState", item.getPluginState());map.put("pluginClassLoader", item.getPluginClassLoader());return map;}).collect(Collectors.toList());return ResponseEntity.ok(collect);}/*** 启动插件** @param pluginId 插件id* @return PluginState*/@GetMapping(value = "/startPluginById")public ResponseEntity<String> startPluginById(String pluginId) {PluginState pluginState = pluginManager.startPlugin(pluginId);return ResponseEntity.ok(pluginState.toString());}/*** 停止插件** @param pluginId 插件id* @return PluginState*/@GetMapping(value = "/stopPluginById")public ResponseEntity<String> stopPluginById(String pluginId) {PluginState pluginState = pluginManager.stopPlugin(pluginId);return ResponseEntity.ok(pluginState.toString());}/*** 禁用插件** @param pluginId 插件id* @return boolean true表示成功*/@GetMapping(value = "/disablePluginById")public ResponseEntity<Boolean> disablePluginById(String pluginId) {boolean result = pluginManager.disablePlugin(pluginId);return ResponseEntity.ok(result);}/*** 启用插件** @param pluginId 插件id* @return boolean true表示成功*/@GetMapping(value = "/enablePluginById")public ResponseEntity<Boolean> enablePluginById(String pluginId) {boolean result = pluginManager.enablePlugin(pluginId);return ResponseEntity.ok(result);}/*** 卸载插件** @param pluginId 插件id* @return boolean true表示成功*/@GetMapping(value = "/unloadPluginById")public ResponseEntity<Boolean> unloadPluginById(String pluginId) {boolean result = pluginManager.unloadPlugin(pluginId);return ResponseEntity.ok(result);}/*** 加载插件** @return String*/@GetMapping(value = "/loadPlugins")public ResponseEntity<String> loadPlugins() {pluginManager.loadPlugins();//开启所有插件pluginManager.startPlugins();return ResponseEntity.ok("SUCCESS");}/*** 执行插件中的扩展点** @param pluginId 插件id* @return String 执行结果*/@GetMapping(value = "/executePluginExtensionHandlerById")public ResponseEntity<String> executePluginExtensionHandlerById(String pluginId) {List<Class<?>> extensionClasses = pluginManager.getExtensionClasses(pluginId);for (Class<?> extensionClass : extensionClasses) {if (extensionClass.getName().equals("pub.qingyun.service.impl.TestExtensionHandler")) {try {Class<?> clz = Class.forName("pub.qingyun.service.impl.TestExtensionHandler", true, Thread.currentThread().getContextClassLoader());TestExtensionHandler extensionHandler = (TestExtensionHandler) clz.newInstance();String execute = extensionHandler.execute("hello");extensionHandler.run();} catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {throw new RuntimeException(e);}}}return ResponseEntity.ok("SUCCESS");}
}