[I] Add load profile estimators [incubator-wayang]

["github-actions[bot] (via GitHub)" <gi...@apache.org>]

github-actions[bot] opened a new issue, #371:
URL: https://github.com/apache/incubator-wayang/issues/371

   Add load profile estimators
   
   https://github.com/apache/incubator-wayang/blob/f68bf88d8cf86f826771ffc74b171d82fcb23f23/wayang-platforms/wayang-jdbc-template/src/main/java/org/apache/wayang/jdbc/operators/SqlToRddOperator.java#L100
   
   ```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.wayang.jdbc.operators;
   
   import org.apache.spark.api.java.JavaRDD;
   import org.apache.wayang.basic.data.Record;
   import org.apache.wayang.core.optimizer.OptimizationContext;
   import org.apache.wayang.core.plan.wayangplan.UnaryToUnaryOperator;
   import org.apache.wayang.core.platform.ChannelDescriptor;
   import org.apache.wayang.core.platform.ChannelInstance;
   import org.apache.wayang.core.platform.lineage.ExecutionLineageNode;
   import org.apache.wayang.core.types.DataSetType;
   import org.apache.wayang.core.util.JsonSerializable;
   import org.apache.wayang.core.util.Tuple;
   import org.apache.wayang.core.util.json.WayangJsonObj;
   import org.apache.wayang.jdbc.channels.SqlQueryChannel;
   import org.apache.wayang.jdbc.platform.JdbcPlatformTemplate;
   import org.apache.wayang.spark.channels.RddChannel;
   import org.apache.wayang.spark.execution.SparkExecutor;
   import org.apache.wayang.spark.operators.SparkExecutionOperator;
   
   import java.sql.Connection;
   import java.util.Collection;
   import java.util.Collections;
   import java.util.Iterator;
   import java.util.List;
   import java.util.stream.Collectors;
   import java.util.stream.StreamSupport;
   
   public class SqlToRddOperator extends UnaryToUnaryOperator<Record, Record> implements SparkExecutionOperator, JsonSerializable {
   
       private final JdbcPlatformTemplate jdbcPlatform;
   
       public SqlToRddOperator(JdbcPlatformTemplate jdbcPlatform) {
           this(jdbcPlatform, DataSetType.createDefault(Record.class));
       }
   
       public SqlToRddOperator(JdbcPlatformTemplate jdbcPlatform, DataSetType<Record> dataSetType) {
           super(dataSetType, dataSetType, false);
           this.jdbcPlatform = jdbcPlatform;
       }
   
       protected SqlToRddOperator(SqlToRddOperator that) {
           super(that);
           this.jdbcPlatform = that.jdbcPlatform;
       }
   
       @Override
       public List<ChannelDescriptor> getSupportedInputChannels(int index) {
           return Collections.singletonList(this.jdbcPlatform.getSqlQueryChannelDescriptor());
       }
   
       @Override
       public List<ChannelDescriptor> getSupportedOutputChannels(int index) {
           return Collections.singletonList(RddChannel.UNCACHED_DESCRIPTOR);
       }
   
       @Override
       public Tuple<Collection<ExecutionLineageNode>, Collection<ChannelInstance>> evaluate(
               ChannelInstance[] inputs,
               ChannelInstance[] outputs,
               SparkExecutor executor,
               OptimizationContext.OperatorContext operatorContext) {
           // Cast the inputs and outputs.
           final SqlQueryChannel.Instance input = (SqlQueryChannel.Instance) inputs[0];
           final RddChannel.Instance output = (RddChannel.Instance) outputs[0];
   
           JdbcPlatformTemplate producerPlatform = (JdbcPlatformTemplate) input.getChannel().getProducer().getPlatform();
           final Connection connection = producerPlatform
                   .createDatabaseDescriptor(executor.getConfiguration())
                   .createJdbcConnection();
   
           Iterator<Record> resultSetIterator = new SqlToStreamOperator.ResultSetIterator(connection, input.getSqlQuery());
           Iterable<Record> resultSetIterable = () -> resultSetIterator;
   
           // Convert the ResultSet to a JavaRDD.
           JavaRDD<Record> resultSetRDD = executor.sc.parallelize(
                   StreamSupport.stream(resultSetIterable.spliterator(), false).collect(Collectors.toList()),
                   executor.getNumDefaultPartitions()
           );
   
           output.accept(resultSetRDD, executor);
   
           // TODO: Add load profile estimators
           ExecutionLineageNode queryLineageNode = new ExecutionLineageNode(operatorContext);
           queryLineageNode.addPredecessor(input.getLineage());
           ExecutionLineageNode outputLineageNode = new ExecutionLineageNode(operatorContext);
           output.getLineage().addPredecessor(outputLineageNode);
   
           return queryLineageNode.collectAndMark();
       }
   
       @Override
       public boolean containsAction() {
           return false;
       }
   
       @Override
       public WayangJsonObj toJson() {
           return null;
       }
   }
   
   ```
   
   62397f497b5acae872a796cd27739ccd938d6efe


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Re: [I] Add load profile estimators [wayang]

["github-actions[bot] (via GitHub)" <gi...@apache.org>]

github-actions[bot] closed issue #371: Add load profile estimators
URL: https://github.com/apache/wayang/issues/371


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Re: [I] Add load profile estimators [wayang]

["github-actions[bot] (via GitHub)" <gi...@apache.org>]

github-actions[bot] commented on issue #371:
URL: https://github.com/apache/wayang/issues/371#issuecomment-5506125478

   Closed in 769658d7d87dd1a1075f1c6b0b83a42909924c55


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