/*
 * Copyright (c) 2012, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.messaging.jmq.jmsserver.persist.file;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import com.sun.messaging.jmq.io.SysMessageID;
import com.sun.messaging.jmq.jmsserver.core.DestinationUID;
import com.sun.messaging.jmq.jmsserver.data.BaseTransaction;
import com.sun.messaging.jmq.jmsserver.util.BrokerException;

public class MsgRemovalEvent extends TransactionEvent {

    DestinationUID destUID;
    SysMessageID sysMessageID;

    static TransactionEvent create(byte subtype) {
        TransactionEvent result = null;

        result = new MsgRemovalEvent();
        return result;
    }

    @Override
    int getType() {
        return BaseTransaction.MSG_REMOVAL_TYPE;
    }

    int getSubType() {
        return 0;
    }

    public MsgRemovalEvent() {

    }

    public MsgRemovalEvent(DestinationUID did, SysMessageID mid) {
        this.destUID = did;
        this.sysMessageID = mid;
    }

    @Override
    public byte[] writeToBytes() throws IOException {
        // Log all msgs and acks for producing and consuming txn
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(baos);

        dos.writeByte(BaseTransaction.MSG_REMOVAL_TYPE);
        dos.writeByte(0);
        dos.writeUTF(destUID.toString());
        sysMessageID.writeID(dos);

        dos.close();
        baos.close();

        byte[] data = baos.toByteArray();
        return data;

    }

    @Override
    public void readFromBytes(byte[] data) throws IOException, BrokerException {
        ByteArrayInputStream bais = new ByteArrayInputStream(data);
        DataInputStream dis = new DataInputStream(bais);

        dis.skip(2);
        String dest = dis.readUTF();
        destUID = new DestinationUID(dest);
        sysMessageID = new SysMessageID();
        sysMessageID.readID(dis);

        dis.close();
        bais.close();
    }

}
