com.wabacus.config.database.datasource.JNDIDataSource.java Source code

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Here is the source code for com.wabacus.config.database.datasource.JNDIDataSource.java

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/* 
 * Copyright (C) 2010---2014 (wuweixing)<349446658@qq.com>
 * 
 * This file is part of Wabacus 
 * 
 * Wabacus 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 <http://www.gnu.org/licenses/>.
 */
package com.wabacus.config.database.datasource;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.dom4j.Element;

import com.wabacus.exception.WabacusConfigLoadingException;

public class JNDIDataSource extends AbsDataSource {
    private static Log log = LogFactory.getLog(JNDIDataSource.class);

    private String jndi;

    private DataSource ds;

    public String getJndi() {
        return jndi;
    }

    public void setJndi(String jndi) {
        this.jndi = jndi;
    }

    public Connection getConnection() {
        Connection conn = null;
        try {
            log.debug("??" + this.getName() + "??");
            conn = getDataSource().getConnection();
        } catch (SQLException e) {
            log.error("????", e);
        }
        return conn;
    }

    public DataSource getDataSource() {
        Context context = null;
        try {
            if (ds != null) {
                return ds;
            }
            context = new InitialContext();
            ds = (DataSource) context.lookup(jndi);
            return ds;
        } catch (Exception e) {
            log.error("????", e);
            return null;
        } finally {
            try {
                if (context != null) {
                    context.close();
                }
            } catch (Exception ex) {
                log.error("????", ex);
            }
        }

    }

    public void loadConfig(Element eleDataSource) {
        super.loadConfig(eleDataSource);
        List lstEleProperties = eleDataSource.elements("property");
        if (lstEleProperties == null || lstEleProperties.size() == 0) {
            throw new WabacusConfigLoadingException("??" + this.getName() + "?jndi?");
        }
        Element eleChild;
        String name;
        String value;
        for (int i = 0; i < lstEleProperties.size(); i++) {
            eleChild = (Element) lstEleProperties.get(i);
            name = eleChild.attributeValue("name");
            value = eleChild.getText();
            name = name == null ? "" : name.trim();
            value = value == null ? "" : value.trim();
            if (name.equals("jndi")) {
                jndi = value;
                break;
            }
        }
        if (jndi == null || jndi.trim().equals("")) {
            throw new WabacusConfigLoadingException("??" + this.getName() + "?jndi");
        }
    }
}