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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
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 * elects to include this software in this distribution under the [CDDL or GPL
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package org.shoal.adapter.store.commands;

import org.shoal.ha.cache.api.DataStoreException;
import org.shoal.ha.cache.api.ShoalCacheLoggerConstants;
import org.shoal.ha.cache.impl.command.Command;
import org.shoal.ha.cache.impl.command.ReplicationCommandOpcode;
import org.shoal.ha.cache.impl.util.*;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * @author Mahesh Kannan
 */
public class LoadResponseCommand
        extends Command {

    private static final Logger _logger = Logger.getLogger(ShoalCacheLoggerConstants.CACHE_LOAD_RESPONSE_COMMAND);

    private long version;

    private byte[] rawV;

    private long tokenId;

    private String originatingInstance;

    private String respondingInstanceName;

    public LoadResponseCommand() {
        super(ReplicationCommandOpcode.LOAD_RESPONSE);
    }

    public LoadResponseCommand(K key, long version, byte[] rawV) {
        this();
        super.setKey(key);
        this.version = version;
        this.rawV = rawV;
    }

    public void setTokenId(long tokenId) {
        this.tokenId = tokenId;
    }

    public long getVersion() {
        return version;
    }

    public void setOriginatingInstance(String originatingInstance) {
        this.originatingInstance = originatingInstance;
    }

    public byte[] getRawV() {
        return rawV;
    }

    protected boolean beforeTransmit() {
        setTargetName(originatingInstance);
        return originatingInstance != null;
    }

    private void writeObject(ObjectOutputStream out)
        throws IOException {

        out.writeLong(version);
        out.writeLong(tokenId);
        out.writeUTF(originatingInstance);
        out.writeUTF(dsc.getInstanceName());

        out.writeBoolean(rawV != null);
        if (rawV != null) {
            out.writeInt(rawV.length);
            out.write(rawV);
        }
        if (_logger.isLoggable(Level.FINE)) {
            _logger.log(Level.FINE, dsc.getInstanceName() + getName() + " sending load_response command for "
                    + getKey() + " to " + originatingInstance + "; version = " + version + "; state = "
                    + (rawV == null ? "NOT_FOUND" : rawV.length));
        }
    }

    private void readObject(ObjectInputStream ris)
        throws IOException {
        version = ris.readLong();
        tokenId = ris.readLong();
        originatingInstance = ris.readUTF();
        respondingInstanceName = ris.readUTF();
        boolean notNull = ris.readBoolean();
        if (notNull) {
            int vLen = ris.readInt();
            rawV = new byte[vLen];
            ris.readFully(rawV);
        }
    }

    @Override
    public void execute(String initiator)
        throws DataStoreException {

        ResponseMediator respMed = getDataStoreContext().getResponseMediator();
        CommandResponse resp = respMed.getCommandResponse(tokenId);
        if (resp != null) {
            if (_logger.isLoggable(Level.FINE)) {
                _logger.log(Level.FINE, dsc.getInstanceName() + " received load_response key=" + getKey() + "; version=" + version
                + "; from " + respondingInstanceName);
            }

            resp.setRespondingInstanceName(respondingInstanceName);
            resp.setResult(this);
        }
    }

    public String toString() {
        return getName() + "(" + getKey() + ")";
    }
}