com.vethrfolnir.network.ReadPacket.java Source code

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Here is the source code for com.vethrfolnir.network.ReadPacket.java

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/**
 * Copyright (C) 2013-2014 Project-Vethrfolnir
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.vethrfolnir.network;

import io.netty.buffer.ByteBuf;

import java.util.ArrayList;

import com.vethrfolnir.logging.MuLogger;
import com.vethrfolnir.services.threads.CorvusThreadPool;

import corvus.corax.Corax;

/**
 * @author Vlad
 *
 */
public abstract class ReadPacket {
    protected static final MuLogger log = MuLogger.getLogger(ReadPacket.class);

    public abstract void read(NetworkClient context, ByteBuf buff, Object... params);

    public ReadPacket() {
        Corax.process(this);
    }

    protected short readC(ByteBuf buff) {
        return buff.readUnsignedByte();
    }

    protected int readD(ByteBuf buff) {
        return buff.readInt();
    }

    protected int readSh(ByteBuf buff) {
        return buff.readUnsignedShort();
    }

    /**
     * Don't forget to release the buffer
     * @param buff
     * @return
     */
    protected ByteBuf readArray(ByteBuf buff) {
        return buff.readBytes(buff.readableBytes());
    }

    protected byte[] readByteArray(ByteBuf buff) {
        byte[] arr = new byte[buff.readableBytes()];
        buff.readBytes(arr);
        return arr;
    }

    /**
     * Don't forget to release the buffer
     * @param buff
     * @param len
     * @return
     */
    protected ByteBuf readArray(ByteBuf buff, int len) {
        return buff.readBytes(len);
    }

    /**
     * This is only for LS <-> GS Communication, do not use it for clients! Unless overriden and managed
     * @param buff
     * @return
     */
    protected String readS(ByteBuf buff) {
        try {
            ArrayList<Character> ins = new ArrayList<>();

            char in;
            while (buff.isReadable() && (in = buff.readChar()) != '\000') {
                ins.add(in);
            }

            char[] arr = new char[ins.size()];

            for (int i = 0; i < arr.length; i++) {
                arr[i] = ins.get(i);
            }
            String str = new String(arr);
            return str;
        } catch (Exception e) {
            log.warn("Failed reading string!", e);
        }

        return null;
    }

    @SuppressWarnings("unchecked")
    protected <T> T as(Object obj) {
        return (T) obj;
    }

    @SuppressWarnings("unchecked")
    protected <T> T as(Object obj, Class<T> type) {
        return (T) obj;
    }

    protected void invalidate(ByteBuf buff) {
        buff.readerIndex(buff.writerIndex());
    }

    /**
     * Execute later in the cached thread pool
     * @param run
     */
    protected final void enqueue(Runnable run) {
        Corax.fetch(CorvusThreadPool.class).executeLongRunning(run);
    }

    protected final void enqueue(final Object... buff) {
        Corax.fetch(CorvusThreadPool.class).executeLongRunning(new Runnable() {

            @Override
            public void run() {
                ReadPacket.this.invokeLater(buff);
            }
        });
    }

    /**
     * Override if enqueued
     * @param buff
     */
    protected void invokeLater(Object... buff) {
        throw new RuntimeException("ReadPacket.invokeLater() must be overriden when using an enqueue()!");
    }
}