orgunitcache.java

java实现的可配置的工作流引擎,采用jsp+javabean实现

package com.hongsoft.res.database;

import java.util.HashMap;
import java.util.List;

import org.hibernate.Session;

import com.hongsoft.agile.Global;
import com.hongsoft.res.pojo.OrgUnitElement;
import com.hongsoft.res.pojo.ResException;
import com.hongsoft.res.pojo.ResObjectElement;

public class OrgUnitCache {
    private static final Object lock = new Object();

    private static OrgUnitElement globalOUElem = null;

    private static HashMap ouCache = new HashMap();

    private static void load(Session session) {
        if (globalOUElem == null) {
            synchronized (lock) {
                if (globalOUElem == null) {
                    try {
                        reload(session);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }
            }
        }
    }

    public static OrgUnitElement getGlobalOrgUnitElem(Session session) {
        load(session);
        return globalOUElem;
    }

    public static OrgUnitElement getOrgUnitElem(Session session, long rootID) {
        load(session);
        return (OrgUnitElement) ouCache.get(new Long(rootID));
    }

    public static synchronized void reload(Session session) {
        try {
            globalOUElem = ResHibernateFactory.createOrgUnitHibernate().getOUElement(session, Global.TOP_ORG_UNIT);
            ouCache.put(new Long(globalOUElem.getID()), globalOUElem);
            putChildOrgUnitElem(globalOUElem);
        } catch (ResException re) {
            globalOUElem = null;
        }
    }

    private static void putChildOrgUnitElem(OrgUnitElement rootOUElem) {
        List children = rootOUElem.getChildren();
        if (children != null) {
            int size = children.size();
            for (int i = 0; i < size; i++) {
                OrgUnitElement child = new OrgUnitElement((ResObjectElement) children.get(i));
                ouCache.put(new Long(child.getID()), child);
                putChildOrgUnitElem(child);
            }
        }
    }
}