com.papteco.web.netty.QuartzMailBackupServerHandler.java Source code

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Here is the source code for com.papteco.web.netty.QuartzMailBackupServerHandler.java

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.papteco.web.netty;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import com.papteco.web.beans.ClientRequestBean;
import com.papteco.web.beans.UsersBean;
import com.papteco.web.dbs.UserDAO;

/**
 * Handles both client-side and server-side handler depending on which
 * constructor was called.
 */
public class QuartzMailBackupServerHandler extends ChannelInboundHandlerAdapter {

    private static final Logger logger = Logger.getLogger(QuartzMailBackupServerHandler.class.getName());

    private String mailbackup_dir;
    private UsersBean user;

    public QuartzMailBackupServerHandler(String rootpath) {
        this.mailbackup_dir = new File(rootpath, "MAILS_BACKUP").getPath();
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        // Echo back the received object to the client.
        ClientRequestBean bean = (ClientRequestBean) msg;
        switch (bean.getActionType()) {
        case 'M':
            user = UserDAO.getUser(bean.getReqUser());
            if (StringUtils.isNotBlank(user.getMailFileTimeStamp()))
                bean.setTimestamp(user.getMailFileTimeStamp());
            ctx.write(bean);
            break;
        case 'U':
            if (bean.getPrjObj() != null) {
                byte[] buffer = (byte[]) bean.getPrjObj();
                BufferedOutputStream buff = null;
                String storingPath = new File(mailbackup_dir, bean.getReqUser()).getPath();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd-HHmmss");

                File mailbackupfile = new File(storingPath, sdf.format(new Date()) + bean.getMailfileSuffix());
                if (!mailbackupfile.exists()) {
                    mailbackupfile.getParentFile().mkdirs();
                    mailbackupfile.createNewFile();
                }
                buff = new BufferedOutputStream(new FileOutputStream(mailbackupfile));
                buff.write(buffer);
                buff.flush();
                buff.close();
                user.setMailFileTimeStamp(bean.getTimestamp());
                UserDAO.saveUser(user);
            }
            ctx.close();
            break;
        }
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.info("Unexpected exception from downstream.");
        ctx.close();
    }

}