com.papteco.client.netty.DownMailClientHandler.java Source code

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Here is the source code for com.papteco.client.netty.DownMailClientHandler.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.client.netty;

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

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;

import org.apache.log4j.Logger;

import com.papteco.client.ui.EnvConstant;
import com.papteco.web.beans.ClientRequestBean;

public class DownMailClientHandler extends ChannelInboundHandlerAdapter {

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

    private ClientRequestBean req = new ClientRequestBean(NettyConstant.DOWN_MAIL_FILE);

    /**
     * Creates a client-side handler.
     */
    public DownMailClientHandler(String username, String mailfile) {
        req.setReqUser(username);
        req.setAdditional1(mailfile);
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        // Send the first message if this handler is a client-side handler.
        ctx.writeAndFlush(req);
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        // TODO Auto-generated method stub
        logger.info("Download Handler Stop!");
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        // Echo back the received object to the server.
        ClientRequestBean bean = (ClientRequestBean) msg;
        if (bean.getPrjObj() != null) {
            File file = new File(this.combineFolderPath(EnvConstant.LCL_STORING_PATH, "MAILS_BACKUP"),
                    bean.getAdditional1());
            logger.info("Writing local file: " + file.getPath());
            if (!file.exists()) {
                logger.info("File not existing: " + file.getPath());
            }
            byte[] buffer = (byte[]) bean.getPrjObj();
            BufferedOutputStream buff = null;
            buff = new BufferedOutputStream(new FileOutputStream(file));
            buff.write(buffer);
            buff.flush();
            buff.close();
        } else {
            logger.info("Cannot find the specific file.");
        }
        ctx.close();
    }

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

    protected String combineFolderPath(String path1, String path2) {
        File f = new File(path1, path2);
        if (!f.exists()) {
            f.mkdirs();
            f.setExecutable(true, false);
            f.setReadable(true, false);
            f.setWritable(true, false);
        }
        return f.getPath();
    }
}