exec/java-exec/src/main/java/org/apache/drill/exec/physical/config/UnorderedDeMuxExchange.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.drill.exec.physical.config;

import java.util.Collections;

import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.exec.physical.MinorFragmentEndpoint;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.base.Receiver;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;

/**
 * UnorderedDeMuxExchange is a version of DeMuxExchange where the incoming batches are not sorted.
 */
@JsonTypeName("unordered-demux-exchange")
public class UnorderedDeMuxExchange extends AbstractDeMuxExchange {

  public UnorderedDeMuxExchange(@JsonProperty("child") PhysicalOperator child, @JsonProperty("expr") LogicalExpression expr) {
    super(child, expr);
  }

  @Override
  public Receiver getReceiver(int minorFragmentId) {
    createSenderReceiverMapping();

    MinorFragmentEndpoint sender = receiverToSenderMapping.get(minorFragmentId);
    if (sender == null) {
      throw new IllegalStateException(String.format("Failed to find sender for receiver [%d]", minorFragmentId));
    }

    return new UnorderedReceiver(this.senderMajorFragmentId, Collections.singletonList(sender), false);
  }

  @Override
  protected PhysicalOperator getNewWithChild(PhysicalOperator child) {
    return new UnorderedDeMuxExchange(child, expr);
  }
}