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Java Web Frame: wf-support
package org.webframe.support.driver;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Vector;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.webframe.support.driver.exception.DriverNotExistException;
import org.webframe.support.driver.exception.ModulePluginConfigException;
import org.webframe.support.driver.resource.jar.JarResourcePatternResolver;
import org.webframe.support.util.SystemLogUtils;
/**
* @author 黄国庆
* @version $Id: codetemplates.xml,v 1.1 2009/09/07 08:48:12 Exp $ Create: 2011-4-5 下午04:21:54
*/
public abstract class ModulePluginUtils {
public static final String DELIMITERS = ",; \t\n";
protected static final String PREFIX_CLASSPATH = "classpath:";
private static final String CONFIG_FILE_NAME = ".#modulePluginConfig";
private static Map cacheDriverInfoMap = new HashMap();
private static List needUpdateDriverInfos = new ArrayList();
/**
* 缓存已加载的模块插件配置信息到物理文件
*
* @param realConfigDirectory 模块插件配置信息缓存文件夹路径，绝对路径
* @author 黄国庆 2011-4-30 下午01:39:24
*/
public static void cacheModulePluginConfig(String realConfigDirectory) {
if (realConfigDirectory == null || "".equals(realConfigDirectory)) {
throw new ModulePluginConfigException("模块插件配置信息缓存文件夹路径不能为空或null！");
}
File directory = new File(realConfigDirectory);
if (!directory.exists()) {
directory.mkdirs();
} else if (directory.isFile()) {
throw new ModulePluginConfigException(realConfigDirectory + "不是文件夹路径！");
}
try {
File file = new File(realConfigDirectory, CONFIG_FILE_NAME);
if (file.exists()) {
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file));
Object obj = ois.readObject();
ois.close();
Map cacheMap = new HashMap(8);
if (obj instanceof List) {
List list = (List) obj;
for (Object object : list) {
if (object instanceof SerializableDriverInfo) {
SerializableDriverInfo sdi = (SerializableDriverInfo) object;
if (sdi.inJar) {
cacheMap.put(sdi.driverClass, sdi.lastModifyTime);
}
}
}
}
Enumeration driverInfos = getDriverInfos();
while (driverInfos.hasMoreElements()) {
ModulePluginDriverInfo driverInfo = driverInfos.nextElement();
String key = driverInfo.driverClass.getName();
if (cacheMap.containsKey(key) && cacheMap.get(key) != driverInfo.lastModifyTime) {
needUpdateDriverInfos.add(driverInfo);
}
}
if (needUpdateDriverInfos.size() > 0) {
SystemLogUtils.rootPrintln("更新模块插件驱动详细信息缓存文件Begin！");
for (ModulePluginDriverInfo mpdi : needUpdateDriverInfos) {
SystemLogUtils.secondPrintln("更新" + mpdi.getDriver() + "缓存文件！");
}
serializeDriverInfos(file, false);
SystemLogUtils.rootPrintln("更新模块插件驱动详细信息缓存文件End！");
}
} else {
SystemLogUtils.rootPrintln("创建模块插件驱动详细信息缓存文件Begin！");
serializeDriverInfos(file, true);
SystemLogUtils.rootPrintln("创建模块插件驱动详细信息缓存文件End！");
}
} catch (Exception e) {
e.printStackTrace();
throw new ModulePluginConfigException(realConfigDirectory + "模块插件配置信息缓存文件写入信息失败！");
}
}
protected static List getNeedUpdateDriverInfos() {
return needUpdateDriverInfos;
}
public static Enumeration getDriverInfos() {
return ModulePluginManager.getDriverInfos();
}
/**
* 根据模块驱动类名称，获取模块驱动类详细信息
*
* @param driverClassName 模块驱动类名称，字符串（包括包路径）
* @return 如果不存在抛出异常
* @throws DriverNotExistException
* @author 黄国庆 2011-5-1 下午01:40:25
*/
public static ModulePluginDriverInfo getDriverInfo(String driverClassName) throws DriverNotExistException {
if (cacheDriverInfoMap.containsKey(driverClassName)) {
return cacheDriverInfoMap.get(driverClassName);
}
Enumeration infos = getDriverInfos();
while (infos.hasMoreElements()) {
ModulePluginDriverInfo driverInfo = infos.nextElement();
if (driverInfo.getDriverClass().getName().equals(driverClassName)) {
cacheDriverInfoMap.put(driverClassName, driverInfo);
return driverInfo;
}
}
throw new DriverNotExistException(driverClassName);
}
@SuppressWarnings("unchecked")
public static Enumeration getDrivers(Class clazz) {
Enumeration infos = getDriverInfos();
Vector drivers = new Vector();
while (infos.hasMoreElements()) {
ModulePluginDriverInfo driverInfo = infos.nextElement();
if (clazz != null && clazz.isAssignableFrom(driverInfo.getDriver().getClass())) {
drivers.add((X) driverInfo.driver);
}
}
return drivers.elements();
}
/**
* 根据ClassRelativeResourceLoader加载符合pattern的资源
*
* @param loaderClass 定位class
* @param pattern 匹配符
* @return 可能为null
* @author 黄国庆 2011-4-6 上午09:46:22
*/
protected static Resource[] getResources(ModulePluginDriverInfo driverInfo, String pattern) {
try {
JarResourcePatternResolver jarResourcePatternResolver;
if (driverInfo.isInJar()) {
jarResourcePatternResolver = new JarResourcePatternResolver(driverInfo.jarResourceLoader);
} else {
jarResourcePatternResolver = new JarResourcePatternResolver(new DefaultResourceLoader());
pattern = PREFIX_CLASSPATH + pattern;
}
return jarResourcePatternResolver.getResources(pattern);
} catch (IOException e) {
return null;
}
}
/**
* 根据指定class处理path，如果path为null，则返回null；如果path以"/"Begin，则直接返回path；
* 如果path不以"/"开始，那么返回loaderClass所在包的路径再加上path路径。
*
* @param loaderClass 指定class，根据该clas所在的包来定位path的最终路径
* @param path 包的相对路径，或者是相对于loaderClass的相对路径
* @return 可能为null
* @author 黄国庆 2011-4-6 上午09:38:57
*/
protected static String resolvePath(Class loaderClass, String path) {
if (path == null) return null;
if (path.indexOf(":") > 0) return path;
if (!path.startsWith("/")) {
String baseName = loaderClass.getName();
int index = baseName.lastIndexOf('.');
if (index != -1) {
baseName = "/" + baseName.substring(0, index);
}
if (path.length() != 0) {
path = baseName + "/" + path;
} else {
path = baseName;
}
}
return path;
}
private static void serializeDriverInfos(File file, boolean create) throws IOException, FileNotFoundException {
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file));
Enumeration driverInfos = getDriverInfos();
List