com.openteach.diamond.network.waverider.slave.SlaveState.java Source code

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Here is the source code for com.openteach.diamond.network.waverider.slave.SlaveState.java

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/**
 * Copyright 2013 openteach
 *
 *  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.openteach.diamond.network.waverider.slave;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.ByteBuffer;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.openteach.diamond.network.waverider.State;
import com.openteach.diamond.network.waverider.command.Command;
import com.openteach.diamond.network.waverider.network.Packet;

/**
 * 
 * Slave ?
 * 
 * @author raoqiang
 *
 */
public class SlaveState extends State {

    private static final Log logger = LogFactory.getLog(SlaveState.class);

    private static final long serialVersionUID = 9106821624690079506L;

    private Boolean isMasterCandidate = false;

    public Boolean getIsMasterCandidate() {
        return isMasterCandidate;
    }

    public void setIsMasterCandidate(Boolean isMasterCandidate) {
        this.isMasterCandidate = isMasterCandidate;
    }

    public static SlaveState fromByteBuffer(ByteBuffer buffer) {
        ByteArrayInputStream bin = null;
        ObjectInputStream oin = null;
        try {
            bin = new ByteArrayInputStream(buffer.array(), Packet.getHeaderSize() + Command.getHeaderSize(),
                    buffer.remaining());
            oin = new ObjectInputStream(bin);
            return (SlaveState) oin.readObject();
        } catch (IOException e) {
            logger.error(e);
            throw new RuntimeException(e);
        } catch (ClassNotFoundException e) {
            logger.error(e);
            throw new RuntimeException(e);
        } finally {
            if (oin != null) {
                try {
                    oin.close();
                } catch (IOException e) {
                    logger.error(e);
                }
            }
        }
    }

    public ByteBuffer toByteBuffer() {
        ByteArrayOutputStream bout = null;
        ObjectOutputStream oout = null;
        try {
            bout = new ByteArrayOutputStream();
            oout = new ObjectOutputStream(bout);
            oout.writeObject(this);
            oout.flush();
            return ByteBuffer.wrap(bout.toByteArray());
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            try {
                if (oout != null) {
                    oout.close();
                }
                if (bout != null) {
                    bout.close();
                }
            } catch (IOException e) {
                logger.error(e);
            }
        }
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{id:");
        sb.append(id);
        sb.append(", isMasterCandidate:");
        sb.append(isMasterCandidate);
        sb.append("}");

        return sb.toString();
    }
}