/**
* 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 java.util.List;
import org.apache.drill.common.exceptions.PhysicalOperatorSetupException;
import org.apache.drill.exec.physical.EndpointAffinity;
import org.apache.drill.exec.physical.OperatorCost;
import org.apache.drill.exec.physical.base.AbstractStore;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.base.PhysicalVisitor;
import org.apache.drill.exec.physical.base.Root;
import org.apache.drill.exec.physical.base.Size;
import org.apache.drill.exec.physical.base.Store;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.google.common.base.Preconditions;
@JsonTypeName("screen")
public class Screen extends AbstractStore {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(Screen.class);
private final DrillbitEndpoint endpoint;
public Screen(@JsonProperty("child") PhysicalOperator child, @JacksonInject DrillbitEndpoint endpoint) {
super(child);
this.endpoint = endpoint;
}
@Override
public List<EndpointAffinity> getOperatorAffinity() {
return Collections.singletonList(new EndpointAffinity(endpoint, 1000000000000l));
}
@Override
public int getMaxWidth() {
return 1;
}
@Override
public void applyAssignments(List<DrillbitEndpoint> endpoints) throws PhysicalOperatorSetupException {
// we actually don't have to do anything since nothing should have changed. we'll check just check that things
// didn't get screwed up.
if (endpoints.size() != 1) throw new PhysicalOperatorSetupException("A Screen operator can only be assigned to a single node.");
DrillbitEndpoint endpoint = endpoints.iterator().next();
// logger.debug("Endpoint this: {}, assignment: {}", this.endpoint, endpoint);
if (!endpoint.equals(this.endpoint)) {
throw new PhysicalOperatorSetupException(String.format(
"A Screen operator can only be assigned to its home node. Expected endpoint %s, Actual endpoint: %s",
this.endpoint, endpoint));
}
}
@Override
public Store getSpecificStore(PhysicalOperator child, int minorFragmentId) {
return new Screen(child, endpoint);
}
@JsonIgnore
public DrillbitEndpoint getEndpoint() {
return endpoint;
}
@Override
public String toString() {
return "Screen [endpoint=" + endpoint + ", getChild()=" + getChild() + "]";
}
@Override
public OperatorCost getCost() {
return new OperatorCost(0, 0, 1000, child.getSize().getRecordCount());
}
@Override
protected PhysicalOperator getNewWithChild(PhysicalOperator child) {
return new Screen(child, endpoint);
}
@Override
public <T, X, E extends Throwable> T accept(PhysicalVisitor<T, X, E> physicalVisitor, X value) throws E {
return physicalVisitor.visitScreen(this, value);
}
}