GridH2CacheObject.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 org.apache.ignite.internal.processors.query.h2.twostep.msg;

import java.nio.ByteBuffer;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.internal.GridKernalContext;
import org.apache.ignite.internal.processors.cache.CacheObject;
import org.apache.ignite.internal.processors.cache.GridCacheContext;
import org.apache.ignite.internal.processors.query.h2.opt.GridH2ValueCacheObject;
import org.apache.ignite.plugin.extensions.communication.MessageReader;
import org.apache.ignite.plugin.extensions.communication.MessageWriter;
import org.h2.value.Value;

/**
 * H2 Cache object message.
 */
public class GridH2CacheObject extends GridH2ValueMessage {
    /** */
    private int cacheId;

    /** */
    private CacheObject obj;

    /**
     *
     */
    public GridH2CacheObject() {
        // No-op.
    }

    /**
     * @param v Value.
     * @throws IgniteCheckedException If failed.
     */
    public GridH2CacheObject(GridH2ValueCacheObject v) throws IgniteCheckedException {
        this.obj = v.getCacheObject();

        GridCacheContext<?,?> cctx = v.getCacheContext();

        if (cctx != null) {
            this.cacheId = cctx.cacheId();

            obj.prepareMarshal(cctx.cacheObjectContext());
        }
    }

    /** {@inheritDoc} */
    @Override public Value value(GridKernalContext ctx) throws IgniteCheckedException {
        GridCacheContext<?,?> cctx = null;

        if (ctx != null) {
            cctx = ctx.cache().context().cacheContext(cacheId);

            obj.finishUnmarshal(cctx.cacheObjectContext(), cctx.deploy().globalLoader());
        }

        return new GridH2ValueCacheObject(cctx, obj);
    }

    /** {@inheritDoc} */
    @Override public boolean readFrom(ByteBuffer buf, MessageReader reader) {
        reader.setBuffer(buf);

        if (!reader.beforeMessageRead())
            return false;

        if (!super.readFrom(buf, reader))
            return false;

        switch (reader.state()) {
            case 0:
                cacheId = reader.readInt("cacheId");

                if (!reader.isLastRead())
                    return false;

                reader.incrementState();

            case 1:
                obj = reader.readMessage("obj");

                if (!reader.isLastRead())
                    return false;

                reader.incrementState();

        }

        return reader.afterMessageRead(GridH2CacheObject.class);
    }

    /** {@inheritDoc} */
    @Override public boolean writeTo(ByteBuffer buf, MessageWriter writer) {
        writer.setBuffer(buf);

        if (!super.writeTo(buf, writer))
            return false;

        if (!writer.isHeaderWritten()) {
            if (!writer.writeHeader(directType(), fieldsCount()))
                return false;

            writer.onHeaderWritten();
        }

        switch (writer.state()) {
            case 0:
                if (!writer.writeInt("cacheId", cacheId))
                    return false;

                writer.incrementState();

            case 1:
                if (!writer.writeMessage("obj", obj))
                    return false;

                writer.incrementState();

        }

        return true;
    }

    /** {@inheritDoc} */
    @Override public short directType() {
        return -22;
    }

    /** {@inheritDoc} */
    @Override public byte fieldsCount() {
        return 2;
    }

    /** {@inheritDoc} */
    @Override public String toString() {
        return String.valueOf(obj);
    }
}