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

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Here is the source code for com.papteco.web.netty.OpenFileClientHandler.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.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

import org.apache.log4j.Logger;

import com.papteco.web.beans.ClientRequestBean;
import com.papteco.web.beans.QueueItem;

/**
 * Handler implementation for the object echo client. It initiates the ping-pong
 * traffic between the object echo client and server by sending the first
 * message to the server.
 */
public class OpenFileClientHandler extends ChannelInboundHandlerAdapter {

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

    private QueueItem openfile;
    private String filepath;
    private String[] fileStructPath;

    /**
     * Creates a client-side handler.
     */
    public OpenFileClientHandler(QueueItem openfile, String filepath, String[] fileStructPath) {
        this.openfile = openfile;
        this.filepath = filepath;
        this.fileStructPath = fileStructPath;
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        // TODO Auto-generated method stub
        ctx.close();
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        // Send the first message if this handler is a client-side handler.
        File file = new File(this.filepath);
        if (file.exists()) {
            ClientRequestBean bean = new ClientRequestBean('P');
            QueueItem qItem = new QueueItem();
            qItem.setParam(this.fileStructPath);
            bean.setqItem(qItem);
            InputStream fis = new BufferedInputStream(new FileInputStream(file));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            bean.setPrjObj(buffer);
            fis.close();
            ctx.writeAndFlush(bean);
        }
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        // Echo back the received object to the server.
        ClientRequestBean bean = new ClientRequestBean('O');
        bean.setqItem(openfile);
        ctx.writeAndFlush(bean);
    }

    @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();
    }
}