compiler/frontend/spark/src/main/java/org/apache/nemo/compiler/frontend/spark/core/SparkBroadcast.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.nemo.compiler.frontend.spark.core;

import org.apache.nemo.runtime.executor.data.BroadcastManagerWorker;
import scala.reflect.ClassTag$;

/**
 * @param <T> type of the broadcast data.
 */
public final class SparkBroadcast<T> extends org.apache.spark.broadcast.Broadcast<T> {
  private final long tag;

  /**
   * Constructor.
   *
   * @param tag       broadcast id.
   * @param classType class type.
   */
  SparkBroadcast(final long tag, final Class<T> classType) {
    super(tag, ClassTag$.MODULE$.apply(classType));
    this.tag = tag;
  }

  @Override
  public T getValue() {
    return (T) BroadcastManagerWorker.getStaticReference().get(tag);
  }

  @Override
  public void doUnpersist(final boolean blocking) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void doDestroy(final boolean blocking) {
    throw new UnsupportedOperationException();
  }
}