modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridChangeGlobalStateMessageResponse.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.cache;

import java.nio.ByteBuffer;
import java.util.UUID;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.internal.GridDirectTransient;
import org.apache.ignite.internal.util.typedef.internal.CU;
import org.apache.ignite.internal.util.typedef.internal.S;
import org.apache.ignite.internal.util.typedef.internal.U;
import org.apache.ignite.plugin.extensions.communication.MessageReader;
import org.apache.ignite.plugin.extensions.communication.MessageWriter;

/**
 *
 */
public class GridChangeGlobalStateMessageResponse extends GridCacheMessage {
    /** */
    private static final long serialVersionUID = 0L;

    /** Request id. */
    private UUID requestId;

    /** Activation error. */
    @GridDirectTransient
    private Throwable err;

    /** Serialized activation error. */
    private byte[] errBytes;

    /**
     * Default constructor.
     */
    public GridChangeGlobalStateMessageResponse() {
         /* No-op. */
    }

    /**
     *
     */
    public GridChangeGlobalStateMessageResponse(UUID requestId, Throwable err) {
        this.requestId = requestId;
        this.err = err;
    }

    /** {@inheritDoc} */
    @Override public boolean cacheGroupMessage() {
        return false;
    }

    /** {@inheritDoc} */
    @Override public int handlerId() {
        return 0;
    }

    /**
     *
     */
    public UUID getRequestId() {
        return requestId;
    }

    /**
     *
     */
    public Throwable getError() {
        return err;
    }

    /** {@inheritDoc} */
    @Override public void prepareMarshal(GridCacheSharedContext ctx) throws IgniteCheckedException {
        super.prepareMarshal(ctx);

        if (err != null && errBytes == null)
            errBytes = CU.marshal(ctx, false, err);

    }

    /** {@inheritDoc} */
    @Override public void finishUnmarshal(GridCacheSharedContext ctx, ClassLoader ldr) throws IgniteCheckedException {
        super.finishUnmarshal(ctx, ldr);

        if (errBytes != null && err == null)
            err = ctx.marshaller().unmarshal(errBytes, U.resolveClassLoader(ldr, ctx.gridConfig()));

    }

    /** {@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 3:
                if (!writer.writeByteArray("errBytes", errBytes))
                    return false;

                writer.incrementState();

            case 4:
                if (!writer.writeUuid("requestId", requestId))
                    return false;

                writer.incrementState();

        }

        return true;
    }

    /** {@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 3:
                errBytes = reader.readByteArray("errBytes");

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

                reader.incrementState();

            case 4:
                requestId = reader.readUuid("requestId");

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

                reader.incrementState();

        }

        return reader.afterMessageRead(GridChangeGlobalStateMessageResponse.class);
    }

    /** {@inheritDoc} */
    @Override public short directType() {
        return -45;
    }

    /** {@inheritDoc} */
    @Override public byte fieldsCount() {
        return 5;
    }

    /** {@inheritDoc} */
    @Override public boolean addDeploymentInfo() {
        return false;
    }

    /** {@inheritDoc} */
    @Override public String toString() {
        return S.toString(GridChangeGlobalStateMessageResponse.class, this, super.toString());
    }
}