com.yea.remote.netty.handle.PingHandler.java Source code

Introduction

Here is the source code for com.yea.remote.netty.handle.PingHandler.java

Source

/**
 * Copyright 2017 
 *
 * Licensed 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.yea.remote.netty.handle;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;

import com.yea.core.remote.constants.RemoteConstants;
import com.yea.core.remote.struct.Header;
import com.yea.core.remote.struct.Message;
import com.yea.remote.netty.handle.NettyChannelHandler;
import com.yea.remote.netty.handle.observer.ChannelInboundHandlerObservable;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;

/**
 * 
 * ?Ping?
 * @author yiyongfei
 * 
 */
public class PingHandler extends ChannelInboundHandlerObservable implements NettyChannelHandler {

    private ApplicationContext context;

    /** 
     * @see org.springframework.context.ApplicationContextAware#setApplicationContext(org.springframework.context.ApplicationContext)
     */
    public void setApplicationContext(ApplicationContext arg0) throws BeansException {
        context = arg0;
    }

    public ApplicationContext getApplicationContext() throws BeansException {
        return context;
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        Message message = (Message) msg;
        if (message.getHeader() != null
                && (message.getHeader().getType() == RemoteConstants.MessageType.PING_REQ.value()
                        || message.getHeader().getType() == RemoteConstants.MessageType.PING_RESP.value())) {
            try {
                execute(ctx, message);
            } catch (Exception ex) {
                if (RemoteConstants.MessageType.PING_RESP.value() == message.getHeader().getType()) {
                    message.getHeader().setType(RemoteConstants.MessageType.SUSPEND_RESP.value());
                    message.getHeader().setResult(RemoteConstants.MessageResult.FAILURE.value());
                    message.setBody(ex);
                } else {
                    message.getHeader().setType(RemoteConstants.MessageType.SUSPEND_REQ.value());
                    message.getHeader().setResult(RemoteConstants.MessageResult.FAILURE.value());
                    message.setBody(ex);
                }
                ctx.fireChannelRead(msg);
            }
        } else {
            ctx.fireChannelRead(msg);
        }
    }

    protected void execute(ChannelHandlerContext ctx, Message message) throws Exception {
        // TODO Auto-generated method stub
        if (message.getHeader().getType() == RemoteConstants.MessageType.PING_REQ.value()) {
            Message respMessage = new Message();
            Header header = new Header();
            header.setType(RemoteConstants.MessageType.PING_RESP.value());
            header.setSessionID(message.getHeader().getSessionID());
            header.setResult(RemoteConstants.MessageResult.SUCCESS.value());
            respMessage.setHeader(header);
            ctx.writeAndFlush(respMessage);
        } else if (message.getHeader().getType() == RemoteConstants.MessageType.PING_RESP.value()) {
            notifyObservers(message.getHeader().getSessionID(), message.getHeader(), Boolean.valueOf(true));
        } else {
            ctx.fireChannelRead(message);
        }
    }

    public ChannelHandler clone() throws CloneNotSupportedException {
        PingHandler obj = null;
        obj = (PingHandler) super.clone();
        return obj;
    }
}