GridTaskNameHashKey.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;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import org.apache.ignite.internal.processors.cache.GridCacheInternal;

/**
 * Keys for task name hashing.
 */
public class GridTaskNameHashKey implements Externalizable, GridCacheInternal {
    /** Serial version UID. */
    private static final long serialVersionUID = 0L;

    /** Task name hash. */
    private int taskNameHash;

    /**
     * Empty constructor required by {@link Externalizable}.
     */
    public GridTaskNameHashKey() {
        // No-op.
    }

    /**
     * @param taskNameHash Task name hash.
     */
    public GridTaskNameHashKey(int taskNameHash) {
        this.taskNameHash = taskNameHash;
    }

    /** {@inheritDoc} */
    @Override public void writeExternal(ObjectOutput out) throws IOException {
        out.writeInt(taskNameHash);
    }

    /** {@inheritDoc} */
    @Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        taskNameHash = in.readInt();
    }

    /** {@inheritDoc} */
    @Override public boolean equals(Object o) {
        if (this == o)
            return true;

        if (!(o instanceof GridTaskNameHashKey))
            return false;

        GridTaskNameHashKey that = (GridTaskNameHashKey)o;

        return taskNameHash == that.taskNameHash;
    }

    /** {@inheritDoc} */
    @Override public int hashCode() {
        return taskNameHash;
    }
}