com.netty.game.server.handler.ExtHandler.java Source code

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Here is the source code for com.netty.game.server.handler.ExtHandler.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.netty.game.server.handler;

import com.netty.game.server.config.ServerConfigData;
import com.netty.game.server.msg.ServerCustomMsg;
import com.netty.game.server.msg.ServerCustomMsg.CustomMsg;
import com.netty.game.server.msg.ServerCustomMsg.CustomMsg.CustomParam;
import com.netty.game.server.msg.ServerCustomMsg.CustomMsg.ParamValue;
import com.netty.game.server.util.StringUtils;

import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;

public class ExtHandler extends ChannelHandlerAdapter {

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ctx.channel().pipeline().writeAndFlush(msg);
        ServerCustomMsg.CustomMsg req = (ServerCustomMsg.CustomMsg) msg;
        System.out.println("received msg: \n" + req);
        if (req.getCmd() != ServerConfigData.CMD_EXT) {
            ctx.writeAndFlush(resp(ServerConfigData.CMD_EXT, "subCmd", null, -1, ""));
            ctx.close();
            throw new IllegalArgumentException("<ExtHandler>cmd error! must be ext cmd!");
        }
        String subCmd = req.getParamValueByKey(ServerConfigData.KEY_SUB_CMD);
        String subCmdParam = req.getParamValueByKey(ServerConfigData.KEY_SUBCMD_PARAM);
        if (StringUtils.isBlank(subCmd)) {
            ctx.writeAndFlush(resp(ServerConfigData.CMD_EXT, "subCmd", null, -2, "?"));
            ctx.close();
            throw new IllegalArgumentException("<ExtHandler>subCmd param empty!");
        }
        ctx.writeAndFlush(resp(ServerConfigData.CMD_EXT, subCmd, subCmdParam, 1, "ext??"));
    }

    private ServerCustomMsg.CustomMsg resp(int cmd, String subCmd, String mySubCmdParam, int result, String desc) {
        ParamValue.Builder subCmdParam = ParamValue.newBuilder();
        subCmdParam.addValue(subCmd);
        CustomParam.Builder subCmdCustomParam = CustomParam.newBuilder();
        subCmdCustomParam.setParamKey(ServerConfigData.KEY_SUB_CMD);
        subCmdCustomParam.setParamValues(subCmdParam);

        ParamValue.Builder resultParam = ParamValue.newBuilder();
        resultParam.addValue(String.valueOf(result));
        CustomParam.Builder resultCustomParam = CustomParam.newBuilder();
        resultCustomParam.setParamKey("r");
        resultCustomParam.setParamValues(resultParam);

        ParamValue.Builder descParam = ParamValue.newBuilder();
        descParam.addValue(desc);
        CustomParam.Builder descCustomParam = CustomParam.newBuilder();
        descCustomParam.setParamKey("desc");
        descCustomParam.setParamValues(descParam);

        CustomMsg.Builder msgBuild = CustomMsg.newBuilder();
        msgBuild.setCmd(cmd);
        msgBuild.addParams(subCmdCustomParam);
        if (!StringUtils.isBlank(mySubCmdParam)) {
            ParamValue.Builder _mySubCmdParam = ParamValue.newBuilder();
            subCmdParam.addValue(mySubCmdParam);
            CustomParam.Builder mySubCmdCustomParam = CustomParam.newBuilder();
            mySubCmdCustomParam.setParamKey(ServerConfigData.KEY_SUBCMD_PARAM);
            mySubCmdCustomParam.setParamValues(_mySubCmdParam);
            msgBuild.addParams(mySubCmdCustomParam);
        }
        msgBuild.addParams(resultCustomParam);
        msgBuild.addParams(descCustomParam);

        return msgBuild.build();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
        System.err.println("<ExtHandler catch case>");
        ctx.close();
    }
}