package com.ourlinc.helloworld;
import java.io.File;
import java.util.HashMap;
import com.ourlinc.omni.persistence.MappedAnnotation;
import com.ourlinc.omni.persistence.Persistence;
import com.ourlinc.omni.persistence.Persister;
import com.ourlinc.omni.persistence.PersisterSet;
import com.ourlinc.omni.persistence.PersisterStorage;
import com.ourlinc.omni.search.Searcher;
import com.ourlinc.omni.search.quick.QuickSearcher;
import com.ourlinc.omni.storage.Storage;
import com.ourlinc.omni.storage.StorageManager;
import com.ourlinc.swift.Flusher;
import com.ourlinc.swift.Shutdown;
import com.ourlinc.swift.ThreadFlusher;
import com.ourlinc.swift.exception.NotFindException;
import com.ourlinc.swift.exception.TransactionException;
import com.ourlinc.swift.util.Misc;
/**
* 用于统一管理系统的各种数据源，减少配置文件的信息量，同时也提供了一个集中的数据管理中心
*
* @author liangyi
*
*/
public class DataSource extends PersisterSet {
public static final String TICKER_COUNTER = "ticker"; // 用于临时存储的计数器
final StorageManager m_StorageManager;
final HashMap<String, Searcher> m_Searchrs;
final ThreadFlusher m_Flusher; // 基于线程的刷写器（在每个页面请求结束后统一执行）
/*final DataProvider m_dpTrafficPlanIndexer;
final DataProvider m_dpCarpoolIndexer;
final DelayFlusher m_DelayFlusher = new DelayFlusher(); // 延时刷写缓存对象
final DataProvider m_dpCounter; // 计数器数据库*/
final String m_dbPath;
public DataSource(StorageManager sm, ThreadFlusher flusher, String dbPath) {
m_StorageManager = sm;
m_Flusher = flusher;
m_Searchrs = new HashMap<String, Searcher>();
if (null == dbPath) {
dbPath = "";
} else if (dbPath.length() > 0 && File.separatorChar != dbPath.charAt(dbPath.length() - 1)) {
dbPath += File.separatorChar;
}
m_dbPath = dbPath;
}
public Flusher getFlusher() {
return m_Flusher;
}
public <E extends Persistence> PersisterStorage<E> newPersister(Class<E> classOf, PodiBase podi) {
return newPersister(getStorage(classOf.getSimpleName()), classOf, podi);
}
synchronized public <E extends Persistence> PersisterStorage<E> newPersister(Storage storage,
Class<E> classOf, PodiBase podi) {
Persister<E> check = getPersister(classOf);
if (null != check) {
throw new TransactionException("已有同名的存储器：" + check);
}
PersisterStorage<E> persister = new PersisterStorage<E>(storage, MappedAnnotation
.getInstance(classOf, this, podi), classOf);
persister.setFlusher(m_Flusher);
regsiter(persister);
return persister;
}
/*
public <E extends ObjectBase<? extends PodiBase>> PersisterStorage<E> getPersister(
Class<E> classOf) {
return (PersisterStorage<E>) super.getPersister(classOf);
}
*/
// 取得存储器
public Storage getStorage(String name) {
return m_StorageManager.getStorage(name.toLowerCase());
}
// 取得搜索器
public Searcher getSearcher(String name) {
Searcher p = m_Searchrs.get(name);
if (null != p)
return p;
throw new NotFindException("没能找到名为'" + name + "'的查询器");
}
// 取得持久器
public PersisterSet getPersisters() {
return this;
}
// 在关闭系统时安全地执行清除缓存等处理
public void shutdown() {
Shutdown.shutdown();
}
/**
* 创建指定名称的查询器
*
* @param name
* 查询器名
* @return 查询器
*/
synchronized public Searcher newSearcher(String name) {
Searcher check = m_Searchrs.get(name);
if (null != check) {
// throw new TransactionException("已有同名的查询器：" + check);
if (Misc.DebugEnabled) {
Misc.getLogger().debug("已有同名的查询器：" + check, new Throwable());
}
return check;
}
QuickSearcher searcher = new QuickSearcher(m_dbPath + name + "_index.db");
m_Searchrs.put(name, searcher);
return searcher;
}
}