package com.iailab.module.model.mpk.common.utils;
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import com.iailab.module.model.mpk.common.MdkConstant;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.lang3.StringUtils;
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import java.io.File;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Vector;
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@Slf4j
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public class DllUtils {
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private static HashMap<String, URLClassLoader> classLoaderCache = new HashMap<>();
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/**
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* @description: 加载dll到指定class下
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* @author: dzd
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* @date: 2024/9/30 14:27
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**/
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public static void loadDll(Class<?> clazz, String dllPath) {
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try {
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Method method = Runtime.class.getDeclaredMethod("load0", Class.class, String.class);
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boolean accessible = method.isAccessible();
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method.setAccessible(true);
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method.invoke(Runtime.getRuntime(), clazz, dllPath);
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method.setAccessible(accessible);
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log.info("成功加载dll:" + dllPath);
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} catch (Exception e) {
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throw new RuntimeException("加载dll异常", e);
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}
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}
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/**
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* @description: 卸载classLoader下全部dll
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* @author: dzd
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* @date: 2024/9/30 14:31
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**/
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public static synchronized void unloadDll(URLClassLoader classLoader) {
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try {
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Field field = ClassLoader.class.getDeclaredField("nativeLibraries");
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field.setAccessible(true);
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Vector<Object> libs = (Vector<Object>) field.get(classLoader);
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Iterator<Object> it = libs.iterator();
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Object o;
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while (it.hasNext()) {
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o = it.next();
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Method method = o.getClass().getDeclaredMethod("finalize");
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boolean accessible = method.isAccessible();
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method.setAccessible(true);
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method.invoke(o);
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method.setAccessible(accessible);
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Field nameDield = o.getClass().getDeclaredField("name");
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nameDield.setAccessible(true);
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String name = (String) nameDield.get(o);
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log.info("成功卸载dll:" + name);
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}
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} catch (Exception e) {
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throw new RuntimeException("卸载dll异常", e);
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}
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}
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/**
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* @description: 从classLoader中卸载dll，如果dllName传null，则默认删除全部dll
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* @author: dzd
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* @date: 2024/9/30 14:52
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**/
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public static synchronized void unloadDllName(URLClassLoader classLoader, String dllName) {
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try {
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Field field = ClassLoader.class.getDeclaredField("nativeLibraries");
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field.setAccessible(true);
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Vector<Object> libs = (Vector<Object>) field.get(classLoader);
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Iterator<Object> it = libs.iterator();
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Object o;
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while (it.hasNext()) {
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o = it.next();
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Field nameDield = o.getClass().getDeclaredField("name");
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nameDield.setAccessible(true);
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String name = (String) nameDield.get(o);
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// dllName不为null 并且 不等于name，跳出（dllName为null默认全部删除）
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if (StringUtils.isNotEmpty(dllName) && !dllName.equals(name)) {
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return;
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}
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Method method = o.getClass().getDeclaredMethod("finalize");
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boolean accessible = method.isAccessible();
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method.setAccessible(true);
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method.invoke(o);
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method.setAccessible(accessible);
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log.info("成功卸载dll:" + name);
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}
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} catch (Exception e) {
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throw new RuntimeException("卸载dll异常", e);
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}
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}
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/**
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* @description: 加载jar到特定的URLClassLoader，并返回URLClassLoader
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* @author: dzd
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* @date: 2024/9/30 14:20
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**/
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public static synchronized URLClassLoader loadJar(String jarPath) {
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File jarFile = new File(jarPath);
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if (!jarFile.exists()) {
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throw new RuntimeException("jar沒有找到！"+jarPath);
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} else {
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try {
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// 设置classloader的patent为null，限制使用双亲委派，防止其他classloader找到class，导致dll加载到其他classloader
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URLClassLoader urlClassLoader = new URLClassLoader(new URL[]{jarFile.toURI().toURL()},null,null);
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log.info("成功加载jar包:" + jarFile.getAbsolutePath());
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return urlClassLoader;
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} catch (Exception e) {
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throw new RuntimeException("加载jar异常", e);
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}
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}
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}
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public static synchronized void unloadJar(URLClassLoader urlClassLoader) {
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try {
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urlClassLoader.close();
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log.info("成功卸载jar包。");
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} catch (Exception e) {
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throw new RuntimeException("卸载jar异常", e);
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}
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}
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public static synchronized void addClassLoaderCache(String projectId, URLClassLoader urlClassLoader) {
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classLoaderCache.put(projectId, urlClassLoader);
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}
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public static synchronized URLClassLoader getClassLoader(String projectId) {
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return classLoaderCache.get(projectId);
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}
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public static synchronized void removeClassLoaderCache(String projectId) {
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if (classLoaderCache.containsKey(projectId)) {
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URLClassLoader urlClassLoader = classLoaderCache.get(projectId);
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unloadDll(urlClassLoader);
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unloadJar(urlClassLoader);
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classLoaderCache.remove(projectId);
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}
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}
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public static void removeOldFile(String bakPath,String projectId) {
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File dir = new File(bakPath);
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if (dir.exists() && dir.isDirectory()) {
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File[] files = dir.listFiles();
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if (null != files && files.length > 0) {
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for (File file : files) {
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if (file.getName().startsWith(projectId)) {
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file.delete();
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}
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}
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}
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}
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}
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/**
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* @description: 项目启动加载已发布的dll和jar
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* @author: dzd
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* @date: 2024/10/10 11:58
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**/
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public static void loadProjectPublish(String bakPath) {
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File dir = new File(bakPath);
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if (dir.exists() && dir.isDirectory()) {
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File[] files = dir.listFiles();
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if (null != files && files.length > 0) {
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for (File file : files) {
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String fileName = file.getName();
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if (fileName.endsWith(".jar")) {
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String[] split = fileName.substring(0,fileName.length() - 4).split(MdkConstant.SPLIT);
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String projectId = split[0];
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String historyId = split[1];
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String jarFilePath = bakPath + File.separator + projectId + MdkConstant.SPLIT + historyId + ".jar";
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String dllFilePath = bakPath + File.separator + projectId + MdkConstant.SPLIT + historyId + ".dll";
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URLClassLoader urlClassLoader = null;
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try {
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// 加载新的jar
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urlClassLoader = DllUtils.loadJar(jarFilePath);
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} catch (Exception e) {
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throw new RuntimeException("加载jar异常",e);
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}
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try {
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// 加载新的dll
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DllUtils.loadDll(urlClassLoader.loadClass("iail.mdk.model.common.Environment"),dllFilePath);
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} catch (Exception e) {
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DllUtils.unloadJar(urlClassLoader);
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throw new RuntimeException("加载dll异常",e);
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}
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// 都加载成功后加入缓存
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DllUtils.addClassLoaderCache(projectId,urlClassLoader);
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}
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}
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}
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}
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}
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}
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