com.tsc9526.monalisa.orm.datasource.DBConfig Maven / Gradle / Ivy
/*******************************************************************************************
* Copyright (c) 2016, zzg.zhou([email protected])
*
* Monalisa is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see select(String sql,Object... args){
Query query=createQuery().add(sql,args);
return query.getList();
}
public Page select(int limit, int offset,String sql,Object... args){
Query query=createQuery().add(sql,args);
return query.getPage(limit, offset);
}
public List selectList(int limit, int offset,String sql,Object... args){
Query query=createQuery().add(sql,args);
return query.getList(limit, offset);
}
public int execute(String sql,Object... args){
Query query=createQuery().add(sql,args);
return query.execute();
}
public int[] executeBatch(String[] sqls){
Query query=createQuery();
return query.executeBatch(sqls);
}
public int[] executeBatch(String sql,List args){
Query query=createQuery();
query.add(sql);
for(Object[] os:args){
query.addBatch(os);
}
return query.executeBatch();
}
public int[] batchInsert(List> models){
return batchOpModels(models, ModelEvent.INSERT);
}
public int[] batchReplace(List> models){
return batchOpModels(models, ModelEvent.REPLACE);
}
public int[] batchUpdate(List> models){
return batchOpModels(models, ModelEvent.UPDATE);
}
public int[] batchDelete(List> models){
return batchOpModels(models, ModelEvent.DELETE);
}
protected int[] batchOpModels(final List> models,final ModelEvent op){
return com.tsc9526.monalisa.orm.Tx.execute(new com.tsc9526.monalisa.orm.Tx.Atom(){
public int[] execute() throws Throwable {
int[] rs=new int[models.size()];
int i=0;
for(Model m:models){
int r=0;
if(op==ModelEvent.INSERT){
r=m.save();
}else if(op==ModelEvent.REPLACE){
r=m.saveOrUpdate();
}else if(op==ModelEvent.UPDATE){
r=m.update();
}else if(op==ModelEvent.DELETE){
r=m.delete();
}
rs[i++]=r;
}
return rs;
}
});
}
public boolean tableExist(String name){
return tableExist(name, false);
}
public boolean tableExist(String name,boolean includeView){
return getDialect().tableExist(this, name, includeView);
}
public Set getTables(){
return getTables(false);
}
public Set getTables(boolean includeView){
String[] types=includeView? new String[]{"TABLE","VIEW"} : new String[]{"TABLE"};
Connection conn=null;
ResultSet rs=null;
try{
conn=getDataSource().getConnection();
Set tables=new LinkedHashSet();
DatabaseMetaData dbm=conn.getMetaData();
rs=dbm.getTables(null, null,"%",types );
while(rs.next()){
String table=rs.getString("TABLE_NAME");
table=Dialect.getRealname(table);
tables.add(table);
}
return tables;
}catch(SQLException e){
throw new RuntimeException(e);
}finally{
MelpClose.close(rs,conn);
}
}
public static enum Level{
ONLY_READ, ONLY_WRITE, READ_AND_WRITE
}
public static DBConfig fromClass(Class clazzWithDBAnnotation){
return DataSourceManager.getInstance().getDBConfig(clazzWithDBAnnotation);
}
public DBConfig fromDB(String dbKey,DB db){
return DataSourceManager.getInstance().getDBConfig(dbKey,db,false);
}
public static DBConfig fromJdbcUrl(String jdbcUrl,String username,String password){
final String dbKey=jdbcUrl+"&username="+username+"&password="+password;
DB db=createDB(jdbcUrl,username,password);
return DataSourceManager.getInstance().getDBConfig(dbKey, db);
}
public static DB createDB(final String jdbcUrl,final String username,final String password){
final String dbKey=jdbcUrl+"&username="+username+"&password="+password;
final String driverClass=DataSourceManager.getInstance().getDialect(jdbcUrl).getDriver();
return new DB(){
public Class annotationType() {
return DB.class;
}
public String url() {
return jdbcUrl;
}
public String driver() {
return driverClass;
}
public String catalog() {
return "";
}
public String schema() {
return "";
}
public String username() {
return username;
}
public String password() {
return password;
}
public String dbs(){
return "";
}
public String dbsAuthUsers(){
return "";
}
public String tables() {
return "%";
}
public String partitions() {
return null;
}
public String mapping() {
return null;
}
public String modelClass() {
return null;
}
public String modelListener() {
return null;
}
public String datasourceClass() {
return null;
}
public String key() {
return dbKey;
}
public String configName() {
return null;
}
public String configFile() {
return null;
}
public Class configClass() {
return null;
}
public String[] properties(){
return null;
}
};
}
public class Host{
public String NAME;
public Level LEVEL = Level.READ_AND_WRITE;
public String HOST_PORT;
public String URL;
private DBConfig dbcfg;
private Host(String host,String prefix,String suffix){
host=host.trim();
int x=host.indexOf("@");
if(x>0){
NAME=host.substring(0,x);
host=host.substring(x+1);
}
if(host.startsWith("+")){
LEVEL=Level.ONLY_WRITE;
host=host.substring(1);
}else if(host.startsWith("-")){
LEVEL=Level.ONLY_READ;
host=host.substring(1);
}
HOST_PORT=host;
URL=prefix+HOST_PORT+suffix;
initDBConfig();
}
private void initDBConfig(){
dbcfg=new DBConfig();
MelpClass.copy(DBConfig.this._cfg, dbcfg._cfg);
dbcfg.owner=DBConfig.this;
dbcfg._cfg.url=URL;
String x=DBConfig.this._cfg.key;
if(LEVEL==Level.ONLY_READ){
x="-"+x;
}else if(LEVEL==Level.ONLY_WRITE){
x="+"+x;
}
if(NAME!=null){
x=NAME+"@"+x;
}
dbcfg._cfg.key="#"+x;
dbcfg.initialized=true;
DataSourceManager.getInstance().putDBConfig(dbcfg._cfg.key, dbcfg);
}
public DBConfig getConfig(){
return dbcfg;
}
}
public class CFG{
protected String cfgBasePath =null;
private Class annotationClass;
private DB db;
private String key;
private String modelClass;
private String datasourceClass;
private String url;
private String driver;
private String catalog;
private String schema;
private String username;
private String password;
private String dbs;
private String dbsAuthUsers;
private String tables;
private String partitions;
private String modelListener;
private String mapping;
private String configFile;
private String configName;
private Properties p=new Properties();
private List dbHosts=new ArrayList();
private CfgFile cfgFile;
private CfgFile cfgFileLocal;
private List metaPartitions;
private ConfigClass configClass;
private Map cacheModels=new ConcurrentHashMap();
private String cacheTables;
synchronized void init(){
loadProperties();
if(configName==null){
configName=db.configName();
}
if(configName!=null && configName.trim().length()>0){
if(configName.equals(CFG_DEFAULT_NAME)){
throw new RuntimeException("Invalid property configName: cfg! \"cfg\" is the common config for all databases. ");
}
prefixs=new String[]{PREFIX_DB+"."+configName.trim(), PREFIX_DB+"."+CFG_DEFAULT_NAME};
}
this.url = getValue(p,DbProp.PROP_DB_URL.getKey(), db.url(), prefixs);
this.driver = getValue(p,DbProp.PROP_DB_DRIVER.getKey(), db.driver(), prefixs);
this.catalog = getValue(p,DbProp.PROP_DB_CATALOG.getKey(), db.catalog(), prefixs);
this.schema = getValue(p,DbProp.PROP_DB_SCHEMA.getKey(), db.schema(), prefixs);
this.username = getValue(p,DbProp.PROP_DB_USERNAME.getKey(), db.username(), prefixs);
this.password = getValue(p,DbProp.PROP_DB_PASSWORD.getKey(), db.password(), prefixs);
this.dbs = getValue(p,DbProp.PROP_DB_DBS.getKey(), db.dbs(), prefixs);
this.dbsAuthUsers = getValue(p,DbProp.PROP_DB_DBS_AUTH_USERS.getKey(), db.dbsAuthUsers(), prefixs);
this.tables = getValue(p,DbProp.PROP_DB_TABLES.getKey(), db.tables(), prefixs);
this.partitions = getValue(p,DbProp.PROP_DB_PARTITIONS.getKey(), db.partitions(), prefixs);
this.mapping = getValue(p,DbProp.PROP_DB_MAPPING.getKey(), db.mapping(), prefixs);
this.datasourceClass = getValue(p,DbProp.PROP_DB_DATASOURCE_CLASS.getKey(), db.datasourceClass(),prefixs);
this.modelClass = getValue(p,DbProp.PROP_TABLE_MODEL_CLASS.getKey(), db.modelClass(), prefixs);
this.modelListener = getValue(p,DbProp.PROP_TABLE_MODEL_LISTENER.getKey(), db.modelListener(), prefixs);
this.cacheTables = getValue(p,DbProp.PROP_DB_CACHE_TABLES.getKey(), "", prefixs);
if(this.url==null || this.url.trim().length()<1){
if(cfgFile!=null || cfgFileLocal!=null){
throw new RuntimeException("DBCfg: "+key+", missing property: "+prefixs[0]+".url, annotationClass: "+annotationClass
+ ( cfgFile!=null ?("\r\nfile: "+cfgFile.cfgFile.getAbsolutePath()): "")
+ ( cfgFileLocal!=null?("\r\nfile: "+cfgFileLocal.cfgFile.getAbsolutePath()): "")
);
}else{
throw new RuntimeException("DBCfg: "+key+", missing property: url, annotationClass: "+annotationClass);
}
}
processUrlHosts();
}
public void setProperty(String key,String value){
p.setProperty(key, value);
}
public void resetProperties(Properties p){
this.p.clear();
this.p.putAll(p);
}
private void loadProperties(){
if(cfgBasePath!=null){
loadCfgFromFile();
}else{
Class clazz=DBGeneratorProcessing.getDBConfigClass(db);
String cff=db.configFile();
if(clazz!=null && clazz != ConfigClass.class){
try{
configClass=clazz.newInstance();
this.p=configClass.getConfigProperties();
}catch(Exception e){
throw new RuntimeException("Load config exception, class: "+clazz.getName()+", "+e, e);
}
}else if(cff!=null && cff.startsWith("classpath:")){
String resource=cff.substring("classpath:".length());
loadCfgFromClassResource(clazz,resource);
}else{
loadCfgFromFile();
}
}
String[] props=db.properties();
if(props!=null){
for(String pv:props){
if(pv!=null){
int x=pv.indexOf("=");
if(x>0){
String name=pv.substring(0,x).trim();
String value=pv.substring(x+1).trim();
if(!p.containsKey(name)){
p.put(name, value);
}
}
}
}
}
}
protected void processUrlHosts() {
int x1=url.indexOf("[");
if(x1>0){
int x2=url.indexOf("]",x1);
String prefix=url.substring(0,x1);
String suffix=url.substring(0,x2+1);
String[] hosts=url.substring(x1+1,x2).split(",");
for(String h:hosts){
Host dbh=new Host(h,prefix,suffix);
dbHosts.add(dbh);
}
this.url=dbHosts.get(0).URL;
}
}
protected void loadCfgFromClassResource(Class clazz,String resource) {
try{
InputStream in=clazz.getResourceAsStream(resource);
if(in==null && annotationClass!=null){
in=annotationClass.getResourceAsStream(resource);
}
//try: /resource
if(in==null && !resource.startsWith("/")){
resource="/"+resource;
in=clazz.getResourceAsStream(resource);
if(in==null && annotationClass!=null){
in=annotationClass.getResourceAsStream(resource);
}
}
InputStreamReader reader=new InputStreamReader(in,"utf-8");
Properties prop=new Properties();
prop.load(reader);
reader.close();
this.p=prop;
}catch(Exception e){
throw new RuntimeException("Failed to load classpath resource: "+resource,e);
}
}
protected void loadCfgFromFile() {
configFile=db.configFile();
boolean definedCfgFile= configFile!=null && configFile.trim().length()>0;
if(definedCfgFile){
configFile=configFile.trim();
if(configFile.startsWith("file:")){
configFile=configFile.substring("file:".length());
}
if(configFile.startsWith("classpath:")){
configFile=configFile.substring("classpath:".length());
}
}else{
configFile=key+".cfg";
}
configFile=findConfigFile(configFile);
Properties prop=new Properties();
cfgFile=new CfgFile(configFile);
if(!loadCfg(cfgFile,prop)){
cfgFile=null;
}
cfgFileLocal=new CfgFile(configFile+".local");
if(!loadCfg(cfgFileLocal,prop)){
cfgFileLocal=null;
}
if(definedCfgFile && (cfgFile==null && cfgFileLocal==null) ){
throw new RuntimeException("DB config file: "+new File(configFile).getAbsolutePath()+" not found!");
}
this.p=prop;
}
protected String findConfigFile(String configFile){
if(cfgBasePath!=null){
configFile=MelpFile.combinePath(cfgBasePath,configFile);
logger.info("find("+key+") cfg base path by cfgBasePath: "+cfgBasePath+", file: "+configFile);
}else{
if(configFile.startsWith("/")==false){
if(configFile.length()>1 && configFile.charAt(1)==':'){
//Windows ROOT C: D: E: ...
logger.info("find("+key+") cfg base path by win-root config file: "+configFile);
}else{
configFile=MelpFile.combinePath(findCfgBasePath(configFile),configFile);
}
}else{
logger.info("find("+key+") cfg base path by root config file: "+configFile);
}
}
return configFile;
}
protected String findCfgBasePath(String configFile){
String basepath=System.getProperty("DB@"+key);
if(basepath==null){
String defpath=MelpFile.combinePath(DbProp.CFG_ROOT_PATH,configFile);
if(new File(defpath).exists()==false && annotationClass!=null){
basepath=MelpEclipse.findCfgBasePathByClass(annotationClass,configFile);
if(basepath!=null){
logger.info("Search("+key+") base path from class: "+annotationClass.getName()+", path: "+basepath+", file: "+configFile);
return basepath;
}else{
logger.info("Search("+key+") base path use default path: "+DbProp.CFG_ROOT_PATH+", file: "+configFile);
return DbProp.CFG_ROOT_PATH;
}
}else{
logger.info("Search("+key+") base path by default path: "+DbProp.CFG_ROOT_PATH+", file: "+configFile);
return DbProp.CFG_ROOT_PATH;
}
}else{
logger.info("Search("+key+") base path by system property: DB@"+key+", path: "+basepath+", file: "+configFile);
return basepath;
}
}
protected boolean loadCfg(CfgFile cf,Properties prop){
if(cf.cfgFile.exists()){
logger.info("Found ("+key+") base path from: "+cf.cfgFile.getAbsolutePath());
try{
cf.lastModified=cf.cfgFile.lastModified();
InputStreamReader reader=new InputStreamReader(new FileInputStream(cf.cfgFile),"utf-8");
prop.load(reader);
reader.close();
return true;
}catch(IOException e){
throw new RuntimeException("Load db config file: "+cf.cfgFile.getAbsolutePath()+", exception: "+e,e);
}
}
return false;
}
protected String getValue(Properties p,String key,String defaultValue,String[] prefixs){
String r=null;
if(prefixs.length>0){
for(String prefix:prefixs){
String v=p.getProperty(prefix+"."+key);
if(v!=null){
r=v;
break;
}
}
}
if(r==null){
r= p.getProperty(key, defaultValue);
}
if(r!=null){
r=r.trim();
}
return r;
}
public String getProperty(String key){
return this.getValue(p, key, null, prefixs);
}
public String parseFilePath(String path){
VarTemplate vt=new VarTemplate(getVarProperties());
vt.setThrowExceptionOnVarNotFound(true);
return vt.getValue(path);
}
public String getProperty(String key,String defaultValue){
return this.getValue(p, key, defaultValue, prefixs);
}
public int getProperty(String key,int defaultValue){
String v=getProperty(key);
if(v==null || v.trim().length()==0){
return defaultValue;
}else{
return Integer.parseInt(v.trim());
}
}
public String getPropertyOfDB(String key){
return this.getValue(p, key, null, prefixs.length>1?new String[]{prefixs[0]}:prefixs);
}
public String getPropertyOfDB(String key,String defaultValue){
return this.getValue(p, key, defaultValue, prefixs.length>1?new String[]{prefixs[0]}:prefixs);
}
public int getPropertyOfDB(String key,int defaultValue){
String v=getPropertyOfDB(key);
if(v==null || v.trim().length()==0){
return defaultValue;
}else{
return Integer.parseInt(v.trim());
}
}
public Properties getPoolProperties(){
return getPropertiesByPrefix("pool");
}
public Properties getVarProperties(){
return getPropertiesByPrefix("var");
}
public Properties getPropertiesByPrefix(String prefix){
Properties dbps=new Properties();
for(Object o:p.keySet()){
String key=o.toString();
for(String px:prefixs){
String flag=px+"."+prefix+".";
if(key.startsWith(flag)){
dbps.put(key.substring(flag.length()), p.get(key));
}
}
}
return dbps;
}
public Properties getDbsProperties(){
Properties dbps=new Properties();
if(!MelpString.isEmpty(dbs)){
dbps.put("name", dbs);
dbps.put("auth.users", dbsAuthUsers);
for(Object o:p.keySet()){
String key=o.toString();
for(String px:prefixs){
String flag=px+".dbs.";
if(key.startsWith(flag)){
dbps.put(key.substring(flag.length()), p.get(key));
}
}
}
}
return dbps;
}
public boolean isCfgFileChanged(){
if(configClass!=null){
return configClass.isCfgChanged();
}else if(configFile!=null){
if(cfgFile!=null && cfgFile.lastModified>0){
if( cfgFile.lastModified < cfgFile.cfgFile.lastModified()){
return true;
}
}else if(cfgFile==null && new File(configFile).exists()){
return true;
}
if(cfgFileLocal!=null && cfgFileLocal.lastModified>0){
if( cfgFileLocal.lastModified < cfgFileLocal.cfgFile.lastModified()){
return true;
}
}else if(cfgFileLocal==null && new File(configFile+".local").exists()){
return true;
}
}
return false;
}
public synchronized List getMetaPartitions(){
if(metaPartitions==null){
String pts=getPartitions();
metaPartitions=MetaPartition.parsePartitions(pts);
}
return metaPartitions;
}
public MetaPartition getPartition(String tablePrefix){
for(MetaPartition p:getMetaPartitions()){
if(p.getTablePrefix().equalsIgnoreCase(tablePrefix)){
return p;
}
}
return null;
}
public MetaPartition getPartition(Model m){
Table table=m.getClass().getAnnotation(Table.class);
if(table!=null){
String tablePrefix=table.name();
return getPartition(tablePrefix);
}else{
throw new RuntimeException("Model class: "+m.getClass().getName()+" without annotation Table");
}
}
public Cache getCache(Model m){
if(cacheTables!=null && cacheTables.trim().length()>0 && cacheModels.size()==0){
for(String name:MelpString.splits(cacheTables)){
String ckey=name.trim();
String cname=DbProp.PROP_TABLE_CACHE_NAME.getValue(DBConfig.this, ckey);
ckey=getDialect().getTableName(ckey).toLowerCase();
cacheModels.put(ckey, cname);
}
}
String tableName=m.table().name();
String cacheName=getDialect().getTableName(tableName).toLowerCase();
if(cacheModels.containsKey(cacheName)){
String name=cacheModels.get(cacheName);
String cacheClass=DbProp.PROP_TABLE_CACHE_CLASS.getValue(DBConfig.this, tableName);
String eviction =DbProp.PROP_TABLE_CACHE_EVICTION.getValue(DBConfig.this, tableName);
return CacheManager.getInstance().getCache(cacheClass,eviction,name);
}else{
return null;
}
}
public Cache getCache(){
String cacheClass=DbProp.PROP_TABLE_CACHE_CLASS.getValue(DBConfig.this);
String eviction =DbProp.PROP_TABLE_CACHE_EVICTION.getValue(DBConfig.this);
String name =DbProp.PROP_TABLE_CACHE_NAME.getValue(DBConfig.this);
return CacheManager.getInstance().getCache(cacheClass,eviction,name);
}
public Cache getCache(String name){
String cacheClass=DbProp.PROP_TABLE_CACHE_CLASS.getValue(DBConfig.this);
String eviction =DbProp.PROP_TABLE_CACHE_EVICTION.getValue(DBConfig.this);
return CacheManager.getInstance().getCache(cacheClass,eviction,name);
}
public Class getAnnotationClass(){
return annotationClass;
}
public DB getDb() {
return db;
}
public String getKey() {
return key;
}
public String getModelClass() {
return modelClass;
}
public String getDatasourceClass() {
return datasourceClass;
}
public String getUrl() {
return url;
}
public String getDriver() {
if(driver==null||driver.length()<1){
driver=getDialect().getDriver();
}
return driver;
}
public String getCatalog() {
return catalog;
}
public String getSchema() {
return schema;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public String getDbs(){
return dbs;
}
public String getDbsAuthUsers(){
return dbsAuthUsers;
}
public String getTables() {
return tables;
}
public String getPartitions() {
return partitions;
}
public String getModelListener() {
return modelListener;
}
public String getMapping() {
return mapping;
}
public String getConfigFile() {
return configFile;
}
public String getConfigName() {
return configName;
}
public Properties getProperties() {
return p;
}
public List getDbHosts() {
return dbHosts;
}
public File[] getCfgFiles() {
List fs=new ArrayList();
if(cfgFile!=null){
fs.add(cfgFile.cfgFile);
}
if(cfgFileLocal!=null){
fs.add(cfgFileLocal.cfgFile);
}
return fs.toArray(new File[]{});
}
}
class DSI{
private DataSource ds=null;
private String datasourceClass;
private String validationgQuery;
private String driver;
private String password;
private String url;
private String username;
private Properties poolProps=new Properties();
public DSI(){
CFG cfg=getCfg();
datasourceClass=cfg.getDatasourceClass();
if(datasourceClass!=null && datasourceClass.trim().length()>0){
datasourceClass=datasourceClass.trim();
if(datasourceClass.indexOf(".")<0){
datasourceClass=PkgNames.ORM_DATASOURCE+"."+datasourceClass;
}
}
validationgQuery=getDialect().getIdleValidationQuery();
driver = cfg.getDriver();
password = cfg.getPassword();
url = cfg.getUrl();
username = cfg.getUsername();
poolProps.putAll(cfg.getPoolProperties());
}
public boolean equals(Object other){
return toString().equals(other.toString());
}
public String toString(){
StringBuilder sb=new StringBuilder();
sb.append("datasourceClass:").append(datasourceClass);
sb.append(",validationgQuery:").append(validationgQuery);
sb.append(",driver:").append(driver);
sb.append(",password:").append(password);
sb.append(",url:").append(url);
sb.append(",username:").append(username);
TreeMap tree=new TreeMap();
for(Object key:poolProps.keySet()){
tree.put(key, poolProps.get(key));
}
for(Object key:tree.keySet()){
sb.append(","+key+":").append(tree.get(key));
}
return sb.toString();
}
public DataSource getDataSource(){
if(ds==null){
if(!DbProp.ProcessingEnvironment){
ds=getDataSourceFromConfigClass();
}
if(ds==null){
ds=new SimpleDataSource(DBConfig.this);
}
}
return ds;
}
private DataSource getDataSourceFromConfigClass(){
String cc=datasourceClass;
if(cc!=null && cc.trim().length()>0){
cc=cc.trim();
if(cc.indexOf(".")<0){
cc=PkgNames.ORM_DATASOURCE+"."+cc;
}
try{
Object obj=instanceDataSource(cc);
if(obj instanceof PooledDataSource){
PooledDataSource pds=(PooledDataSource)obj;
if(validationgQuery!=null && validationgQuery.trim().length()>0){
pds.setIdleValidationQuery(DbProp.CFG_CONNECT_IDLE_INTERVALS,validationgQuery.trim());
}
pds.setProperties(poolProps);
pds.setDriver(driver);
pds.setPassword(password);
pds.setUrl(url);
pds.setUsername(username);
return pds;
}else if(obj instanceof DataSource){
return(DataSource)obj;
}
}catch(Exception e){
throw new RuntimeException("Create datasource exception: "+e,e);
}
}
return null;
}
protected Object instanceDataSource(String clazz)throws Exception{
if(clazz.equals(PkgNames.ORM_DS_C3p0)){
return MelpLib.createC3p0DataSource();
}else if(clazz.equals(PkgNames.ORM_DS_Durid)){
return MelpLib.createDruidDataSource();
}else{
return MelpClass.forName(clazz).newInstance();
}
}
}
private static class CfgFile{
private File cfgFile;
private long lastModified;
CfgFile(String filePath){
cfgFile=new File(filePath);
}
}
}
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