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/**
* 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.beans.Transient;
import java.util.List;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.exec.physical.base.AbstractExchange;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.base.Receiver;
import org.apache.drill.exec.physical.base.Sender;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
@JsonTypeName("hash-to-random-exchange")
public class HashToRandomExchange extends AbstractExchange{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(HashToRandomExchange.class);
private final LogicalExpression expr;
//ephemeral for setup tasks.
private List<DrillbitEndpoint> senderLocations;
private List<DrillbitEndpoint> receiverLocations;
@JsonCreator
public HashToRandomExchange(@JsonProperty("child") PhysicalOperator child, @JsonProperty("expr") LogicalExpression expr) {
super(child);
this.expr = expr;
}
@Override
public int getMaxSendWidth() {
return Integer.MAX_VALUE;
}
@Override
protected void setupSenders(List<DrillbitEndpoint> senderLocations) {
this.senderLocations = senderLocations;
}
@Override
protected void setupReceivers(List<DrillbitEndpoint> receiverLocations) {
this.receiverLocations = receiverLocations;
}
@Override
public Sender getSender(int minorFragmentId, PhysicalOperator child) {
return new HashPartitionSender(receiverMajorFragmentId, child, expr, receiverLocations);
}
@Override
public Receiver getReceiver(int minorFragmentId) {
return new UnorderedReceiver(senderMajorFragmentId, senderLocations);
}
@Override
protected PhysicalOperator getNewWithChild(PhysicalOperator child) {
return new HashToRandomExchange(child, expr);
}
@JsonProperty("expr")
public LogicalExpression getExpression(){
return expr;
}
}
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